2022

BUILDING ENERGY EFFICIENCY STANDARDS FOR RESIDENTIAL
AND NONRESIDENTIAL BUILDINGS

FOR THE 2022 BUILDING ENERGY EFFICIENCY STANDARDS

TITLE 24, PART 6, AND ASSOCIATED ADMINISTRATIVE REGULATIONS
IN PART 1

AUGUST 2022
CEC-400-2022-010-CMF

CALIFORNIA ENERGY COMMISSION
Gavin Newsom, Governor

California Energy Commission
David Hochschild
Chair
Commissioners
Karen Douglas, J.D.
Siva Gunda
J. Andrew McAllister, Ph.D.
Patty Monahan
Payam Bozorgchami, P.E.
Project Manager
Will Vicent
Office Manager
Building Standards Office
Michael J. Sokol
Deputy Director Efficiency Division
Drew Bohan
Executive Director

DISCLAIMER
Staff members of the California Energy Commission prepared this report. As such, it does not necessarily represent the views of the Energy Commission, its employees, or the State of California. The Energy Commission, the State of California, its employees, contractors and subcontractors make no warrant, express or implied, and assume no legal liability for the information in this report; nor does any party represent that the uses of this information will not infringe upon privately owned rights. This report has not been approved or disapproved by the Energy Commission nor has the Commission passed upon the accuracy or adequacy of the information in this report.

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ACKNOWLEGMENTS
We would like to acknowledge the following staff and leaders:
Leadership - Commissioner Andrew McAllister and his advisor, Bill Pennington, for unwavering leadership throughout the standards development process; Payam Bozorgchami, P.E., senior engineer and overall project manager; Maziar Shirakh, P.E., senior engineer and building decarbonization lead; Haile Bucaneg, senior engineer and lead for mechanical measures; Javier Perez, senior specialist and lead for multifamily measures; Peter Strait, supervisor of the Standards Development Unit and interim acting manager of the Building Standards Office; Che Geisler, supervisor of the Standards Tools Unit; Chris Olvera, supervisor of the Outreach & Education Unit; and Will Vicent, manager of the Building Standards Office.
Legal Counsel - Under the leadership of the chief counsel, Linda Barrera, the following staff provided legal counsel: James Qaqundah; Matt Chalmers; Michael Murza; Justin Delacruz; and Josephine Crosby.
Efficiency Division Staff - In the Building Standards Office: Thao Chau, P.E.; Cheng Moua, P.E.; Simon Lee, P.E.; Jeff Miller, P.E.; Ronald Balneg; Danuta Drozdowicz, Adrian Ownby; Michael Shewmaker; Alexis Markstrum; Danny Tam; RJ Wichert; Haider Alhabibi; Amie Brousseau; and Allen Wang. In the Standards Compliance Office: Lorraine White, Joe Loyer; Matthew Haro, P.E.; and Daniel Wong, P.E. The following staff provided administrative support and editing: Christine Collopy; Corrine Fishman; Amber Beck; Tajanee Ford-Whelan; and Mary Trojan.
Energy Commission Consultants - Key consultants include NORESCO, Bruce Wilcox, the California Statewide Codes and Standards Program – which is funded by California utility customers and administered by Pacific Gas and Electric Company, Southern California Edison Company, San Diego Gas and Electric Company, Los Angeles Department of Water and Power, and Sacramento Metropolitan Utility District, under the auspices of the California Public Utilities Commission – and their consultants. We would also like to acknowledge the California Energy Alliance for the submission of their code change proposal relating to lighting in existing buildings.

ABSTRACT
Serving as a precursor to the first generation of building standards, the Department of Housing and Community Development adopted rudimentary energy conservation standards under their State Housing Law authority in 1975. However, the Warren-Alquist Act was passed one year earlier with explicit direction to the California Energy Commission (CEC, formally titled the State Energy Resources Conservation and Development Commission) to adopt and implement standards.
The Building Energy Efficiency Standards (Energy Code) were first adopted in 1976 by the CEC and have been updated periodically since then, as directed by statute. The CEC’s statute created separate authority and specific direction regarding what the standards are to address, development criteria, and provided implementation tools, aids, and technical assistance.
The Energy Code contains energy and water efficiency requirements (and indoor air quality requirements) for newly constructed buildings, additions to existing buildings, and alterations to existing buildings. Public Resources Code Sections 25402 subdivisions (a)-(b) and 25402.1 emphasize the importance of building design and construction flexibility by requiring the CEC to establish performance standards, in the form of an “energy budget” in terms of the energy consumption per square foot of floor space. For this reason, the Energy Code includes both a prescriptive option, allowing builders to comply by using methods known to be efficient, and a performance option, allowing builders complete freedom in their designs provided the building achieves the same overall efficiency as an equivalent building using the prescriptive option. Reference Appendices are adopted along with the Energy Code that contain data and other information that helps builders comply.
The 2022 Energy Code development and adoption process continues a long-standing practice of combining technical rigor, challenging but achievable design and construction practices, public engagement, and full consideration of the views of stakeholders.
The 2022 Energy Code builds on California’s technology innovations, encouraging energy efficient approaches to encourage building decarbonization, emphasizing in particular on heat pumps for space heating and water heating. This set of Energy Codes also extends the benefits of photovoltaic and battery storage systems and other demand flexible technology to work in combinations with heat pumps to enable California buildings to be responsive to climate change. This Energy code also strengthens ventilation standards to improve indoor air quality. This update provides crucial steps in the state’s progress toward 100 percent clean carbon neutrality by midcentury.
Public Resources Code Section 25402.1 also requires the CEC to support the performance standards with compliance tools for builders and building designers. The Alternative Calculation Method (ACM) Approval Manual adopted by regulation as an appendix of the Energy Code establishes requirements for input, output, and calculational uniformity in the computer programs used to demonstrate compliance. From this, the CEC develops and makes publicly available free, public domain building modeling software in order to enable compliance based on modeling of building efficiency and performance. The ACM Approval Manual also includes provisions for private entities seeking to develop compliance software for approval by the CEC, which further encourages flexibility and innovation.
The Energy Code is conceptually divided into three basic sets. First, there is a basic set of mandatory requirements that apply to all buildings. Second, there is a set of performance standards – the energy budgets – that vary by climate zone (of which there are 16 in California) and building type; thus the Energy Code are tailored to local conditions, and provide flexibility in how energy efficiency in buildings can be achieved. Finally, the third set constitutes an alternative to the performance standards, which is a set of prescriptive packages that provide a recipe or a checklist compliance approach.

Keywords:

California Energy Commission	Performance	HVAC	
California Building Code	Time Dependent	Building Commissioning	
California Building Energy Efficiency Standards	Valuation	Process Load	
Title 24, Part 6	TDV	Refrigeration	
Building Energy Efficiency Standards	Ducts in Conditioned Spaces	Data Center	
Residential	High Performance Attics	Exhaust	
Nonresidential	High Performance Walls	Compressed Air	
Newly Constructed	High Efficacy Lighting	Acceptance Testing	
Additions and Alterations to Existing Buildings	Water Heating	Data Collection	
Mandatory	Windows	Cool Roof	
Prescriptive	Envelope Insulation	On-site Renewable	
Source Energy	Controlled Environment Horticulture (CEH)	Fan Energy Index (FEI)	

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Table of Contents
ADMINISTRACTIVE REGULATIONS	1
CALIFORNIA CODE OF REGULATIONS TITLE 24, PART1	1
ARTICLE 1 – ENERGY BUILDING REGULATIONS	2
10‐101 – SCOPE	2
10‐102 – DEFINITIONS	2
10‐103 – PERMIT, CERTIFICATE, INFORMATIONAL, AND ENFORCEMENT REQUIREMENTS FOR DESIGNERS, INSTALLERS, BUILDERS, MANUFACTURERS, AND SUPPLIERS	6
10‐103.1 – NONRESIDENTIAL LIGHTING CONTROLS ACCEPTANCE TEST TRAINING AND CERTIFICATION	16
10‐103.2 – NONRESIDENTIAL MECHANICAL ACCEPTANCE TEST TRAINING AND CERTIFICATION	23
10‐104 – EXCEPTIONAL DESIGNS	29
10‐105 – ENFORCEMENT BY THE COMMISSION	30
10‐106 – LOCALLY ADOPTED ENERGY STANDARDS	31
10‐107 – INTERPRETATIONS	32
10‐108 – EXEMPTION	33
10‐109 – COMPLIANCE SOFTWARE, ALTERNATIVE COMPONENT PACKAGES, EXCEPTIONAL METHODS, DATA REGISTRIES AND RELATED EXTERNAL DIGITAL DATA SOURCES, ALTERNATIVE RESIDENTIAL FIELD VERIFICATION PROTOCOLS, ELECTRONIC DOCUMENT REPOSITORIES, PHOTOVOLTAIC, AND BATTERY STORAGE SYSTEM REQUIREMENT DETERMINATIONS	34
10‐110 – PROCEDURES FOR CONSIDERATION OF APPLICATIONS UNDER SECTIONS 10‐104, 10‐106, 10‐108, AND 10‐
109	37
10‐111 – CERTIFICATION AND LABELING OF FENESTRATION PRODUCT AND EXTERIOR DOOR U‐FACTORS, SOLAR HEAT GAIN COEFFICIENTS, VISIBLE TRANSMITTANCE AND AIR LEAKAGE	38
10‐112 – CRITERIA FOR DEFAULT TABLES	41
10‐113 – RATING AND LABELING OF ROOFING PRODUCT REFLECTANCE AND EMITTANCE	42
10‐114 – DETERMINATION OF OUTDOOR LIGHTING ZONES AND ADMINISTRATIVE RULES FOR USE	44
10‐115 – COMMUNITY SHARED SOLAR ELECTRIC GENERATION SYSTEM OR COMMUNITY SHARED BATTERY STORAGE SYSTEM COMPLIANCE OPTION FOR ON‐SITE SOLAR ELECTRIC GENERATION OR BATTERY STORAGE REQUIREMENTS	49
BUILDING ENERGY EFFICIENCY STANDARDS	49
CALIFORNIA CODE OF REGULATIONS TITLE 24, PART 6	49
SUBCHAPTER 1	49
SECTION 100.0 – SCOPE	49
SECTION 100.1 – DEFINITIONS AND RULES OF CONSTRUCTION	55
SECTION 100.2 – CALCULATION OF TIME DEPENDENT VALUATION (TDV) ENERGY	98
SUBCHAPTER 2 ALL OCCUPANCIES—MANDATORY REQUIREMENTS FOR THE MANUFACTURE, CONSTRUCTION AND INSTALLATION OF SYSTEMS, EQUIPMENT AND BUILDING COMPONENTS
.	100

SECTION 110.0 – SYSTEMS AND EQUIPMENT—GENERAL	100
SECTION 110.1 – MANDATORY REQUIREMENTS FOR APPLIANCES	102
SECTION 110.2 – MANDATORY REQUIREMENTS FOR SPACE‐CONDITIONING EQUIPMENT	103
SECTION 110.3 – MANDATORY REQUIREMENTS FOR SERVICE WATER‐HEATING SYSTEMS AND EQUIPMENT	133
SECTION 110.4 – MANDATORY REQUIREMENTS FOR POOL AND SPA SYSTEMS AND EQUIPMENT	135
SECTION 110.5 – NATURAL GAS CENTRAL FURNACES, COOKING EQUIPMENT, POOL AND SPA HEATERS, AND FIREPLACES: PILOT LIGHTS PROHIBITED	136
SECTION 110.6 – MANDATORY REQUIREMENTS FOR FENESTRATION PRODUCTS AND EXTERIOR DOORS	137
SECTION 110.7 – MANDATORY REQUIREMENTS TO LIMIT AIR LEAKAGE	141
SECTION 110.8 – MANDATORY REQUIREMENTS FOR INSULATION, ROOFING PRODUCTS AND RADIANT BARRIERS
.	142
SECTION 110.9 – MANDATORY REQUIREMENTS FOR LIGHTING CONTROLS	145
SECTION 110.10 – MANDATORY REQUIREMENTS FOR SOLAR READINESS	148
SECTION 110.11 – MANDATORY REQUIREMENTS FOR ELECTRICAL POWER DISTRIBUTION SYSTEM	151
SECTION 110.12 – MANDATORY REQUIREMENTS FOR DEMAND MANAGEMENT	152
SUBCHAPTER 3 NONRESIDENTIAL, HOTEL/MOTEL OCCUPANCIES, AND COVERED PROCESSES—MANDATORY REQUIREMENTS	154
SECTION 120.0— GENERAL	154
SECTION 120.1 – REQUIREMENTS FOR VENTILATION AND INDOOR AIR QUALITY	155
SECTION 120.2 – REQUIRED CONTROLS FOR SPACE‐CONDITIONING SYSTEMS	167
SECTION 120.3 – REQUIREMENTS FOR PIPE INSULATION	172
SECTION 120.4 – REQUIREMENTS FOR AIR DISTRIBUTION SYSTEM DUCTS AND PLENUMS	175
SECTION 120.5 – REQUIRED NONRESIDENTIAL MECHANICAL SYSTEM ACCEPTANCE	178
SECTION 120.6 – MANDATORY REQUIREMENTS FOR COVERED PROCESSES	180
SECTION 120.7 – MANDATORY INSULATION REQUIREMENTS	194
SECTION 120.8 – NONRESIDENTIAL BUILDING COMMISSIONING	196
SECTION 120.9 – MANDATORY REQUIREMENTS FOR COMMERCIAL BOILERS	199
SECTION 120.10 – MANDATORY REQUIREMENTS FOR FANS	200
SUBCHAPTER 4 NONRESIDENTIAL AND HOTEL/MOTEL OCCUPANCIES—MANDATORY REQUIREMENTS FOR LIGHTING SYSTEMS AND EQUIPMENT, AND ELECTRICAL POWER DISTRIBUTION SYSTEMS	201
SECTION 130.0 – LIGHTING SYSTEMS AND EQUIPMENT, AND ELECTRICAL POWER DISTRIBUTION SYSTEMS — GENERAL	201
SECTION 130.1 – MANDATORY INDOOR LIGHTING CONTROLS	204
SECTION 130.2 – OUTDOOR LIGHTING CONTROLS AND EQUIPMENT	211
SECTION 130.3 – SIGN LIGHTING CONTROLS	213
SECTION 130.4 –LIGHTING CONTROL ACCEPTANCE AND INSTALLATION CERTIFICATE REQUIREMENTS	214
SECTION 130.5 –ELECTRICAL POWER DISTRIBUTION SYSTEMS	216

SUBCHAPTER 5 NONRESIDENTIAL AND HOTEL/MOTEL OCCUPANCIES—PERFORMANCE AND PRESCRIPTIVE COMPLIANCE APPROACHES FOR ACHIEVING ENERGY EFFICIENCY	219
SECTION 140.0 – PERFORMANCE AND PRESCRIPTIVE COMPLIANCE APPROACHES	219
SECTION 140.1 – PERFORMANCE APPROACH: ENERGY BUDGETS	220
SECTION 140.2 – PRESCRIPTIVE APPROACH	221
SECTION 140.3 – PRESCRIPTIVE REQUIREMENTS FOR BUILDING ENVELOPES	222
SECTION 140.4 – PRESCRIPTIVE REQUIREMENTS FOR SPACE CONDITIONING SYSTEMS	239
SECTION 140.5 – PRESCRIPTIVE REQUIREMENTS FOR SERVICE WATER HEATING SYSTEMS	263
SECTION 140.6 – PRESCRIPTIVE REQUIREMENTS FOR INDOOR LIGHTING	264
SECTION 140.7 – PRESCRIPTIVE REQUIREMENTS FOR OUTDOOR LIGHTING	281
SECTION 140.8 – PRESCRIPTIVE REQUIREMENTS FOR SIGNS	286
SECTION 140.9 – PRESCRIPTIVE REQUIREMENTS FOR COVERED PROCESSES	288
SECTION 140.10 – PRESCRIPTIVE REQUIREMENTS FOR PHOTOVOLTAIC AND BATTERY STORAGE SYSTEMS	294
SUBCHAPTER 6 NONRESIDENTIAL, AND HOTEL/MOTEL OCCUPANCIES—ADDITIONS, ALTERATIONS, AND REPAIRS	297
SECTION 141.0 – ADDITIONS, ALTERATIONS, AND REPAIRS TO EXISTING NONRESIDENTIAL, AND HOTEL/MOTEL BUILDINGS, TO EXISTING OUTDOOR LIGHTING, AND TO INTERNALLY AND EXTERNALLY ILLUMINATED SIGNS	297
SECTION 141.1 – REQUIREMENTS FOR COVERED PROCESSES IN ADDITIONS, ALTERATIONS TO EXISTING NONRESIDENTIAL, AND HOTEL/MOTEL BUILDINGS	308
SUBCHAPTER 7 SINGLE-FAMILY RESIDENTIAL BUILDINGS – MANDATORY FEATURES AND DEVICES	307
SECTION 150.0 – MANDATORY FEATURES AND DEVICES	307
SUBCHAPTER 8 SINGLE-FAMILY RESIDENTIAL BUILDINGS - PERFORMANCE AND PRESCRIPTIVE COMPLIANCE APPROACHES	331
SECTION 150.1 – PERFORMANCE AND PRESCRIPTIVE COMPLIANCE APPROACHES FOR SINGLE‐FAMILY RESIDENTIAL BUILDINGS	331
SUBCHAPTER 9 SINGLE-FAMILY RESIDENTIAL BUILDINGS - ADDITIONS AND ALTERATIONS TO EXISTING RESIDENTIAL BUILDINGS	346
SECTION 150.2 – ENERGY EFFICIENCY STANDARDS FOR ADDITIONS AND ALTERATIONS TO EXISTING SINGLE‐ FAMILY RESIDENTIAL BUILDINGS	346
SUBCHAPTER 10 MULTIFAMILY BUILDINGS—MANDATORY REQUIREMENTS	360
SECTION 160.0 – GENERAL	360
SECTION 160.1 – MANDATORY REQUIREMENTS FOR BUILDING ENVELOPES	361
SECTION 160.2 – MANDATORY REQUIREMENTS FOR VENTILATION AND INDOOR AIR QUALITY	364
SECTION 160.3 – MANDATORY REQUIREMENTS FOR SPACE CONDITIONING SYSTEMS IN MULTIFAMILY BUILDINGS
.	381
SECTION 160.4 – MANDATORY REQUIREMENTS FOR WATER HEATING SYSTEMS	397
SECTION 160.5 – MANDATORY LIGHTING REQUIREMENTS FOR INDOOR AND OUTDOOR SPACES	399
SECTION 160.6 – MANDATORY REQUIREMENTS FOR ELECTRIC POWER DISTRIBUTION SYSTEMS	413
SECTION 160.7 – MANDATORY REQUIREMENTS FOR COVERED PROCESSES	416

SECTION 160.8 – MANDATORY REQUIREMENTS FOR SOLAR READY BUILDINGS	417
SECTION 160.9 – MANDATORY REQUIREMENTS FOR ELECTRIC READY BUILDINGS	418
SUBCHAPTER 11 MULTIFAMILY BUILDINGS - PERFORMANCE AND PRESCRIPTIVE COMPLIANCE APPROACHES	420
SECTION 170.0 – GENERAL	420
SECTION 170.1 – PERFORMANCE APPROACH	421
SECTION 170.2 – PRESCRIPTIVE APPROACH…	423
SUBCHAPTER 12 MULTIFAMILY BUILDINGS - ADDITIONS, ALTERATIONS, AND REPAIRS TO EXISTING MULTIFAMILY BUILDINGS	480
SECTION 180.0 – GENERAL	480
SECTION 180.1 – ADDITIONS	481
SECTION 180.2 – ALTERATIONS	484
SECTION 180.3 – REPAIRS	502
SECTION 180.4 – WHOLE BUILDING	503
CALIFORNIA MECHANICAL CODE, CALIFORNIA CODE OF REGULATIONS, TITLE 24, PART 4 CHAPTER 6, DUCT SYSTEMS	504
APPENDIX 1‐A STANDARDS AND DOCUMENTS REFERENCED IN THE ENERGY CODE	505
APPENDIX 1‐B ENERGY COMMISSION DOCUMENTS INCORPORATED BY REFERENCE IN THEIR ENTIRETY	516

ADMINISTRACTIVE REGULATIONS
CALIFORNIA CODE OF REGULATIONS TITLE 24, PART1

ARTICLE 1 – ENERGY BUILDING REGULATIONS

– SCOPE
This article contains administrative regulations relating to the energy building regulations in Title 24, Part 6. This article applies to all residential and nonresidential buildings.
Nothing in this article lessens any necessary qualifications or responsibilities of licensed or registered building professionals or other designers or builders, or the duties of enforcement agencies that exist under state or local law.
If any provision of the regulations in this article or the Building Energy Efficiency Standards, Title 24, Part 6, of the California Code of Regulations is found invalid by a court of competent jurisdiction, the remainder of these regulations shall remain in effect.
NOTE: Authority: Sections 25402 and 25402.1, Public Resources Code. Reference: Sections 25402 and 25402.1, Public Resources Code.

– DEFINITIONS
In this article the following definitions apply:
ACCEPTANCE REQUIREMENTS are "acceptance requirements for code compliance" as defined in Section 100.1(b) of Part 6.
ACCEPTANCE TEST TECHNICIAN (ATT) is a Field Technician as defined in Section 10-102 who is certified by an authorized Acceptance Test Technician Certification Provider to perform acceptance testing of either lighting controls or mechanical systems pursuant to the requirements of Sections 10-103.1 or 10-103.2, respectively. ATTs are authorized to perform only those acceptance tests for which they are certified by an ATTCP; ATTs certified to perform acceptance testing of lighting controls are sometimes referred to as “lighting control ATTs”, and ATTs certified to perform acceptance testing of mechanical systems are sometimes referred to as “mechanical ATTs”. (See “Field Technician” and “Acceptance Test Technician Certification Provider”.)
ACCEPTANCE TEST EMPLOYER (ATE) is a person or entity who employs an Acceptance Test Technician and is certified by an authorized Acceptance Test Technician Certification Provider pursuant to the requirements of Sections 10-103.1 or 10-103.2. ATEs are authorized to employ only those ATTs for which they are certified by an ATTCP; ATEs certified to employ ATTs that perform acceptance testing of lighting controls are sometimes referred to as “lighting control ATEs”, and ATEs certified to employ ATTs that perform acceptance testing of mechanical systems are sometimes referred to as “mechanical ATEs”. (See “Acceptance Test Technician” and “Acceptance Test Technician Certification Provider”.)
ACCEPTANCE TEST TECHNICIAN CERTIFICATION PROVIDER (ATTCP) is an agency, organization or entity approved by the Energy Commission to train, certify and oversee ATTs and ATEs relating to either lighting controls or mechanical systems according to the requirements of Sections 10-103.1 or 10-103.2, respectively. ATTCPs are authorized to certify only those ATTs and ATEs for which they are approved by the Energy Commission; ATTCPs approved to certify ATTs and ATEs relating to the acceptance testing of lighting controls are sometimes referred to as “lighting control ATTCPs”, and ATTCPs approved to certify ATTs and ATEs relating to the acceptance testing of mechanical systems are sometimes referred to as “mechanical ATTCPs”. (See “Acceptance Test Technician” and “Acceptance Test Employer”.)

ACM means ALTERNATIVE CALCULATION METHOD are compliance software, or alternative component packages, or exceptional methods approved by the Commission under Section 10-109. ACMs are also referred to as Compliance Software.
ACM APPROVAL MANUALS are the documents establishing the requirements for Energy Commission approval of Compliance Software used to demonstrate compliance with the Building Energy Efficiency Standards for Residential and Nonresidential Buildings currently adopted by the Energy Commission.
ACM REFERENCE MANUAL is the document establishing the procedures required to implement Sections 140.1 and 150.1 of Title 24, Part 6 of the California Code of Regulations in Compliance Software.
ADDITIONALITY is a property of solar offsets whereby the offset causes additional benefits beyond what would occur as a result of all other actions, and which would exclusively benefit the building or property for which the offset substitutes for compliance obligations that would otherwise be required for that building or property, and those benefits would not ever be transferred to other buildings or property.
ALTERNATIVE COMPONENT PACKAGE is a set of building measures whose aggregate calculated energy use is less than or equal to the maximum allowed Energy Budget.
APPLIANCE EFFICIENCY REGULATIONS are the regulations in Title 20, Section 1601 et. seq. of the California Code of Regulations.
APPROVED CALCULATION METHOD is compliance software, or alternative component packages, or exceptional methods approved under Section 10-109.
BUILDING ENERGY EFFICIENCY STANDARDS are those regulations contained in Title 24, Part 6 of the California Code of Regulations.
BUILDING PERMIT is an electrical, plumbing, mechanical, building, or other permit or approval, that is issued by an enforcement agency, and that authorizes any construction that is subject to Part 6.
CALIFORNIA ENERGY COMMISSION is the California State Energy Resources Conservation and Development Commission.
COMMISSION is the California State Energy Resources Conservation and Development Commission.
COMPLEX MECHANICAL SYSTEM is defined here for the purposes of complying with the Design Phase Review component of Section 10-103(a)1. Complex Mechanical Systems are systems that include 1) fan systems each serving multiple thermostatically controlled zones, or 2) built-up air handler systems (non-unitary or nonpackaged HVAC equipment), or 3) hydronic or steam heating systems, or 4) hydronic cooling systems.
Complex systems are NOT the following: unitary or packaged equipment listed in Tables 110.2-A, 110.2-B, 110.2- C, and 110.2-E, that each serve one zone, or two-pipe, heating only systems serving one or more zones.
COMPLIANCE APPROACH is any one of the allowable methods by which the design and construction of a building may be demonstrated to be in compliance with Part 6. The compliance approaches are the performance compliance approach and the prescriptive compliance approach. The requirements for each compliance approach are set forth in Section 100.0(e)2 of Part 6.
COMPLIANCE DATA EXCHANGE FILE is an Extensible Markup Language (XML) file that contains compliance data used to populate a Compliance Document. The Compliance Data Exchange File is part of the Compliance Registration Package.
COMPLIANCE DOCUMENT is any of the documents specified in Section 10-103(a) utilized to demonstrate compliance with Part 6 (i.e., Certificate of Compliance, Certificate of Installation, Certificate of Acceptance, and Certificate of Verification).
COMPLIANCE REGISTRATION PACKAGE means digitally signed or encrypted digital data that is transmitted to or from a Data Registry that contains the data required for registering a Compliance Document with a Data Registry, including the Compliance Data Exchange File. A commonly used method is the Zip file format, a data compression and archiving specification that is in the public domain. Files transmitted to or from a Data Registry using the Zip file format shall be password protected as described in JA7.6.3.2.7.

COMPLIANCE SOFTWARE is software that has been approved pursuant to Section 10-109 of Part 1. CONDITIONED FLOOR AREA is the “conditioned floor area” as defined in Section 100.1(b) of Part 6. CRRC-1 is the Cool Roof Rating Council document titled “Product Rating Program”.
DATA REGISTRY is a web service with a user interface and database maintained by a Registration Provider that complies with the applicable requirements in Reference Joint Appendix JA7, with guidance from the Data Registry Requirements Manual, and provides for registration of residential or nonresidential compliance documentation used for demonstrating compliance with Part 6.
RESIDENTIAL DATA REGISTRY is a data registry that is maintained by a HERS Provider that provides for registration, when required by Part 6 of all residential compliance documentation and the nonresidential Certificate of Verification, and complies with the Data Maintenance requirements of Title 20, Chapter 4, Article 8, Section 1670 et seq.
NONRESIDENTIAL DATA REGISTRY is a data registry that is maintained by a Registration Provider approved by the Commission that provides for registration, when required by Part 6 of all nonresidential compliance documentation, excluding all Certificates of Acceptance recorded by an acceptance test technician certification provider (10-103.1 and 10-103.2). However, nonresidential data registries may not provide for registration of nonresidential Certificates of Verification.
DATA REGISTRY REQUIREMENTS MANUAL is a document that provides additional detailed guidance regarding the functional and technical aspects of the data registry requirements given in Joint Appendix JA7.
DOCUMENTATION AUTHOR is a person who prepares a Title 24 Part 6 compliance document that must subsequently be reviewed and signed by a responsible person in order to certify compliance with Part 6.
ENERGY BUDGET is the “energy budget” as defined in Section 100.1(b) of Part 6.
ENERGY COMMISSION is the California State Energy Resources Conservation and Development Commission.
ENFORCEMENT AGENCY is the city, county, or state agency responsible for issuing a building permit.
EXCEPTIONAL METHOD is a method for estimating the energy performance of building features that cannot be adequately modeled using existing Compliance Software and that is approved by the Executive Director.
EXECUTIVE DIRECTOR is the executive director of the Commission.
FIELD TECHNICIAN is a person who performs acceptance tests in accordance with the specifications in Reference Nonresidential Appendix NA7, and reports the results of the acceptance tests on the Certificate of Acceptance in accordance with the requirements of Section 10-103(a)4.
HERS is the California Home Energy Rating System as described in Title 20, Chapter 4, Article 8, Section 1670.
HERS PROVIDER is an organization that administers a home energy rating system as described in Title 20, Chapter 4, Article 8, Section 1670.
HERS PROVIDER DATA REGISTRY is a data registry maintained by a HERS provider in compliance with requirements per Title 20, Chapter 4, Article 8, Section 1670 et seq.
HERS RATER is a person who has been trained, tested, and certified by a HERS Provider to perform the field verification and diagnostic testing required for demonstrating compliance with the Part 6 as described in Title 20, Chapter 4, Article 8, Section 1670(i).
HVAC SYSTEM is the “HVAC system” as defined in Section 100.1(b) of Part 6.
MANUFACTURED DEVICE is the “manufactured device” as defined in Section 100.1(b) of Part 6.
NFRC 100 is the National Fenestration Rating Council document titled “NFRC 100: Procedure for Determining Fenestration Product U-factors.” (2017) NFRC 100 includes procedures for the Component Modeling Approach (CMA) and site-built fenestration formerly included in a separate document, NFRC 100-SB.
NFRC 200 is the National Fenestration Rating Council document titled “NFRC 200: Procedure for Determining Fenestration Product Solar Heat Gain Coefficients and Visible Transmittance at Normal Incidence.” (2017),

NFRC 202 is the National Fenestration Rating Council document titled “NFRC 202: Procedures for Determining Translucent Fenestration Product Visible Transmittance at Normal Incidence.” (2017).
NFRC 203 is the National Fenestration Rating Council document titled “NFRC 203: Procedure for Determining Visible Transmittance of Tubular Daylighting Devices.” (2017),
NFRC 400 is the National Fenestration Rating Council document titled “NFRC 400: Procedure for Determining Fenestration Product Air Leakage.” (2017).
PART 6 is Title 24, Part 6 of the California Code of Regulations.
PUBLIC ADVISER is the Public Adviser of the Commission.
R-VALUE is the measure of the thermal resistance of insulation or any material or building component expressed in ft²-hr-°F/Btu.
RECORD DRAWINGS are drawings that document the as installed location and performance data on all lighting and space conditioning system components, devices, appliances and equipment, including but not limited to wiring sequences, control sequences, duct and pipe distribution system layout and sizes, space conditioning system terminal device layout and airflow rates, hydronic system and flow rates, and connections for the space conditioning system. Record drawings are sometimes referred to as “as built” drawings.
REFERENCE APPENDICES are the support document for the Building Energy Efficiency Standards and the ACM Approval Manuals. The document consists of three sections: the Reference Joint Appendices (JA), the Reference Residential Appendices (RA), and the Reference Nonresidential Appendices (NA) currently adopted by the Energy Commission.
REFERENCE JOINT APPENDICES are the Reference Joint Appendices currently adopted by the Energy Commission.
REFERENCE NONRESIDENTIAL APPENDICES are the Reference Nonresidential Appendices currently adopted by the Energy Commission.
REFERENCE RESIDENTIAL APPENDICES are the Reference Residential Appendices currently adopted by the Energy Commission.
REGISTERED COMPLIANCE DOCUMENT is a compliance document that has been submitted to a residential or nonresidential Data Registry for retention, verified as valid with an XML schema approved by the Commission, and has gone through the registration process so that the Registered Document displays all applicable electronic signatures as well as the Registration Provider's digital certificate and the document's unique registration number. The image of the registered document is accessible for printing or viewing by authorized users of the Data Registry. The registered document’s unique visible registration number is appended onto the document image by the Data Registry.
REGISTRATION PROVIDER is an organization that administers a data registry service that conforms to the requirements in Reference Joint Appendix JA7.
STANDARD DESIGN BUILDING is a “Standard Design Building” as defined in Section 100.1(b) of Part 6.

NOTE: Authority: Sections 25402 and 25402.1, and 25213, Public Resources Code. Reference: Sections 25007, 25008, 25218.5, 25310, 25402 and 25402.1, 25402.4, 25402.5, 25402.8 and 25943, Public Resources Code.

– PERMIT, CERTIFICATE, INFORMATIONAL, AND ENFORCEMENT REQUIREMENTS FOR DESIGNERS, INSTALLERS, BUILDERS, MANUFACTURERS, AND SUPPLIERS
Documentation. For all buildings other than healthcare facilities, the following documentation is required to demonstrate compliance with Part 6. This documentation shall meet the requirements of Section 10-103(a) or alternatives approved by the Executive Director. Healthcare facilities shall instead comply with the applicable provisions of Chapter 7.
Certificate of Compliance. For all buildings, the Certificate of Compliance described in Section 10-103 shall be signed by the person who is eligible under Division 3 of the Business and Professions Code to accept responsibility for the building design (responsible person); and submitted in accordance with Sections 10- 103(a)1 and 10-103(a)2 to certify conformance with Part 6. If more than one person has responsibility for the building design, each person shall sign the Certificate of Compliance document(s) applicable to that portion of the design for which the person is responsible. Alternatively, the person with chief responsibility for the building design shall prepare and sign the Certificate of Compliance document(s) for the entire building design. Subject to the requirements of Sections 10-103(a)1 and 10-103(a)2, persons who prepare Certificate of Compliance documents (documentation authors) shall sign a declaration statement on the documents they prepare to certify the information provided on the documentation is accurate and complete. In accordance with applicable requirements of 10-103(a)1, the signatures provided by responsible persons and documentation authors shall be original signatures on paper documents or electronic signatures on electronic documents conforming to the electronic signature specifications in Reference Joint Appendix JA7.
For all Nonresidential buildings, the Design Review Kickoff Certificate(s) of Compliance and the Construction Document Design Review Checklist Certificate(s) of Compliance shall be reviewed and signed by a licensed professional engineer or licensed architect, or a licensed contractor representing services performed by or under the direct supervision of a licensed engineer or architect, as specified in the provisions of Division 3 of the Business and Professions Code. For buildings less than 10,000 square feet, this signer may be the engineer or architect of record. For buildings greater than 10,000 square feet but less than 50,000 square feet, this signer shall be a qualified in-house engineer or architect with no other project involvement or a third-party engineer, architect, or contractor. For buildings greater than 50,000 square feet and all buildings with complex mechanical systems serving more than 10,000 square feet, this signer shall be a third-party engineer, architect, or contractor.
All Certificate of Compliance documentation shall conform to a format and informational order and content approved by the Energy Commission.
These documents shall:
Identify the energy features, performance specifications, materials, components, and manufactured devices required for compliance with Part 6.
Identify the building project name and location. The building project name and location identification on the Certificate of Compliance shall be consistent with the building project name and location identification given on the other applicable building design plans and specifications submitted to the enforcement agency for approval with the building permit application.
Display the unique registration number assigned by the data registry if Section 10-103(a)1 requires the document to be registered.
Include a declaration statement to the effect that the building energy features, performance specifications, materials, components, and manufactured devices for the building design identified on the Certificate of Compliance indicate the building is in compliance with the

requirements of Title 24, Parts 1 and 6, and the building design features identified on the Certificate of Compliance are consistent with the building design features identified on the other applicable compliance documents, worksheets, calculations, plans, and specifications submitted to the enforcement agency for approval with the building permit application.
Be signed by the documentation author to certify the documentation is accurate and complete. When document registration is required by Section 10-103(a)1, the signature shall be an electronic signature on an electronic document in accordance with the electronic signature specifications in Reference Joint Appendix JA7.
Be signed by the responsible person eligible under Division 3 of the Business and Professions Code to accept responsibility for the design to certify conformance with Part 6. When document registration is required by Section 10-103(a)1, the signature shall be an electronic signature on an electronic document in accordance with the electronic signature specifications in Reference Joint Appendix JA7.
For all low-rise residential buildings for which compliance requires HERS field verification, the person(s) responsible for the Certificate(s) of Compliance shall submit the Certificate(s) and their associated Compliance Registration Packages for registration and retention to a HERS provider data registry in compliance with Title 20, Chapter 4, Article 8, Section 1670 et seq. The submittals to the HERS provider data registry shall be made electronically in accordance with the specifications in Reference Joint Appendix JA7.
Contingent upon availability and approval of an electronic document repository by the Executive Director, Certificate of Compliance documents and their associated Compliance Registration Packages that are registered and retained by a HERS provider data registry shall also be automatically transmitted by the data registry in compliance with Title 20, Chapter 4, Article 8, Section 1670 et seq, to an electronic document repository for retention in accordance with the specifications in Reference Joint Appendix JA7.
For alterations to existing residential buildings for which HERS field verification is not required, including but not limited to water heater and window replacements, and for additions to existing residential buildings that are less than 300 square feet for which HERS field verification is not required, the enforcement agencies may at their discretion not require any Certificate of Compliance documentation, or may develop simplified Certificate of Compliance documentation for demonstrating compliance with the Standards.
Exemptions from submitting compliance documentation shall not be deemed to grant authorization for any work to be done in any manner in violation of this code or other provisions of law.
Contingent upon approval of data registry(s) by the Commission, all nonresidential buildings, high-rise residential buildings, and hotels and motels, when designated to allow use of an occupancy group or type regulated by Part 6 the person(s) responsible for the Certificate(s) of Compliance shall submit the Certificate(s) and their associated Compliance Registration Packages for registration and retention to a data registry approved by the Commission. The submittals to the approved data registry shall be made electronically in accordance with the specifications in Reference Joint Appendix JA7.
Contingent upon availability and approval of an electronic document repository by the Executive Director, Certificate of Compliance documents and their associated Compliance Registration Packages that are registered and retained by an approved data registry shall also be automatically transmitted by the data registry to an electronic document repository for retention in accordance with the specifications in Reference Joint Appendix JA7.
Application for a building permit. Each application for a building permit subject to Part 6 shall contain at least one copy of the documents specified in Sections 10-103(a)2A, 10-103(a)2B, and 10-103(a)2C.
For all newly constructed buildings, additions, alterations, or repairs regulated by Part 6 the applicant shall submit the applicable Certificate(s) of Compliance to the enforcement agency for approval. The

certificate(s) shall conform to the requirements of Section 10-103(a)1, and shall be approved by the local enforcement agency, in accordance with all applicable requirements of Section 10-103(d), by stamp or authorized signature prior to issuance of a building permit. A copy of the Certificate(s) of Compliance shall be included with the documentation the builder provides to the building owner at occupancy as specified in Section 10-103(b).
For alterations to existing residential buildings for which HERS field verification is required, and when the enforcement agency does not require building design plans to be submitted with the application for a building permit, the applicable Certificate of Compliance documentation specified in Section 10- 103(a)1 is not required to be approved by the enforcement agency prior to issuance of a building permit, but shall be approved by the enforcement agency prior to final inspection of the dwelling unit, and shall be made available to the enforcement agency for all applicable inspections, or made available for viewing on an approved data registry.
When the enforcement agency requires building design plans to be submitted with the application for a building permit, the applicable Certificate of Compliance documents shall be incorporated into the building design plans. When Section 10-103(a)1 requires document registration, the certificate(s) that are incorporated into the building design plans shall be copies of the registered Certificate of Compliance documents from a HERS provider data registry, or a data registry approved by the Commission.
When the enforcement agency requires building design plans and specifications to be submitted with the application for a building permit, the plans shall conform to the specifications for the features, materials, components, and manufactured devices identified on the Certificate(s) of Compliance, and shall conform to all other applicable requirements of Part 6. Plans and specifications shall be submitted to the enforcement agency for any other feature, material, component, or manufactured device that Part 6 requires be indicated on the building design plans and specifications. Plans and specifications submitted with each application for a building permit for Nonresidential buildings, High- rise Residential buildings and Hotels and Motels shall provide acceptance requirements for code compliance of each feature, material, component or manufactured device when acceptance requirements are required under Part 6. Plans and specifications for Nonresidential buildings, High- rise Residential buildings and Hotels and Motels shall require, and indicate with a prominent note on the plans, that within 90 days after the Enforcement Agency issues a permanent final occupancy permit, record drawings be provided to the building owner.
For all buildings, if the specification for a building design feature, material, component, or manufactured device is changed before final construction or installation, such that the building may no longer comply with Part 6 the building must be brought back into compliance, and so indicated on amended plans, specifications, and Certificate(s) of Compliance that shall be submitted to the enforcement agency for approval. Such characteristics shall include the efficiency (or other characteristic regulated by Part 6) of each building design feature, material, component, or device.
The enforcement agency shall have the authority to require submittal of any supportive documentation that was used to generate the Certificate(s) of Compliance, including but not limited to the electronic input file for the compliance software tool that was used to generate performance method Certificate(s) of Compliance; or any other supportive documentation that is necessary to demonstrate that the building design conforms to the requirements of Part 6.
Certificate of Installation. For all buildings, the person in charge of the construction or installation, who is eligible under Division 3 of the Business and Professions Code to accept responsibility for the construction or installation of features, materials, components, or manufactured devices regulated by Part 6 or the Appliance Efficiency Regulations (responsible person) shall sign and submit Certificate of Installation documentation as specified in Section 10-103(a)3 to certify conformance with Part 6. If more than one person has responsibility for the construction or installation, each person shall sign and submit the Certificate of Installation documentation applicable to the portion of the construction or installation for which they are responsible; alternatively, the person with chief responsibility for the construction or

installation shall sign and submit the Certificate of Installation documentation for the entire construction or installation scope of work for the project. Subject to the requirements of Section 10-103(a)3, persons who prepare Certificate of Installation documentation (documentation authors) shall sign a declaration statement on the documents they prepare to certify the information provided on the documentation is accurate and complete. In accordance with applicable requirements of 10-103(a)3, the signatures provided by responsible persons and documentation authors shall be original signatures on paper documents or electronic signatures on electronic documents conforming to the electronic signature specifications in Reference Joint Appendix JA7.
Delegation of Signature Authority. Except where prohibited by law, including but not limited to any requirements under Division 3 of the Business and Professions Code, the Responsible Person may delegate signature authority to third parties (Authorized Representatives) provided that there is a written agreement:
Between the Responsible Person and the person to be designated as the Authorized Representative.
Specifying that the Authorized Representative may sign Certificates of Installation on behalf of the
Responsible Person.
Specifying that the legal responsibility for construction or installation in the applicable classification for the scope of work specified on the Certificate of Installation document(s) remains with the Responsible Person.
That is signed by both the Responsible Person and the Authorized Representative.
That is retained by the HERS Provider to which all compliance documents are submitted for the building to which the Certificate of Installation documentation pertains.
That is maintained in the HERS Provider Data Registry such that it is accessible for verification by, included but not limited to, the Energy Commission and enforcement agencies.
Format. All Certificate of Installation documentation shall conform to a format and informational order and content approved by the Energy Commission.
These documents shall:
Identify the features, materials, components, manufactured devices, and system performance diagnostic results required to demonstrate compliance with Part 6 and the Appliance Efficiency Regulations.
State the number of the building permit under which the construction or installation was performed.
Display the unique registration number assigned by the data registry if Section 10-103(a)3 requires the document to be registered.
Include a declaration statement indicating that the constructed or installed features, materials, components or manufactured devices (the installation) identified on the Certificate of Installation conforms to all applicable codes and regulations, and the installation conforms to the requirements given on the plans and specifications approved by the enforcement agency.
Be signed by the documentation author to certify the documentation is accurate and complete. When document registration is required by Section 10-103(a)3, the signature shall be an electronic signature on an electronic document in accordance with the electronic signature specifications in Reference Joint Appendix JA7.
Be signed by the Responsible Person eligible under Division 3 of the Business and Professions Code to accept responsibility for construction or installation in the applicable classification for the scope of work specified on the Certificate of Installation document(s), or shall be signed by their Authorized Representative. When document registration is required by Section 10-103(a)3, the

signature shall be an electronic signature on an electronic document in accordance with the electronic signature specifications in Reference Joint Appendix JA7.
For all low-rise residential buildings, the person(s) responsible for the Certificate(s) of Installation, or their Authorized Representative(s), shall submit the following Certificate of Installation documentation and their associated Compliance Registration Packages that is applicable to the building to a HERS provider data registry for registration and retention in accordance with Title 20, Chapter 4, Article 8, Section 1670 et. seq. and procedures specified in Reference Residential Appendix RA2:
All Certificates of Installation for which compliance requires HERS field verification.
All other Certificates of Installation, except those exempted by the Energy Commission.
The submittals to the HERS provider data registry shall be made electronically in accordance with the specifications in Reference Joint Appendix JA7.
Contingent upon availability and approval of an electronic document repository by the Executive Director, Certificate of Installation documents and their associated Compliance Registration Packages that are registered and retained by a HERS provider data registry in compliance with Title 20, Chapter 4, Article 8, Section 1670 et seq shall also be automatically transmitted by the data registry to an electronic document repository for retention in accordance with the specifications in Reference Joint Appendix JA7.
For alterations to existing residential buildings for which HERS field verification is not required, including but not limited to water heater and window replacements, and for additions to existing residential buildings that are less than 300 square feet for which HERS field verification is not required, the enforcement agencies may, at their discretion, not require any Certificate of Installation documentation, or may develop simplified Certificate of Installation documentation for demonstrating compliance with the Standards.
Exemptions from submitting compliance documentation shall not be deemed to grant authorization for any work to be done in any manner in violation of this code or other provisions of law.
Contingent upon approval of data registry(s) by the Commission, all nonresidential buildings, high-rise residential buildings, and hotels and motels, when designated to allow use of an occupancy group or type regulated by Part 6 the person(s) responsible for the Certificate(s) of Installation, except those documents exempted by the Energy Commission, shall submit the Certificate(s) and their associated Compliance Registration Packages for registration and retention to a data registry approved by the Commission. The submittals to the approved data registry shall be made electronically in accordance with the specifications in Reference Joint Appendix JA7.
Contingent upon availability and approval of an electronic document repository by the Executive Director, Certificate of Installation documents and their associated Compliance Registration Packages that are registered and retained by an approved data registry shall also be automatically transmitted by the data registry to an electronic document repository for retention in accordance with the specifications in Reference Joint Appendix JA7.
Availability. For all buildings, a copy of the Certificate(s) of Installation shall be posted, or made available with the building permit(s) issued for the building, or made available for viewing on an approved data registry, and shall be made available to the enforcement agency for all applicable inspections. When document registration is required by Section 10-103(a)3, registered copies of the Certificate(s) of Installation from a HERS provider data registry or a data registry approved by the Commission shall be posted or made available with the building permit(s) issued for the building, and shall be made available to the enforcement agency for all applicable inspections. If construction on any portion of the building subject to Part 6 will be impossible to inspect because of subsequent construction, the enforcement agency may require the Certificate(s) of Installation to be posted upon completion of that portion. A copy of the Certificate(s) of Installation shall be included with the

documentation the builder provides to the building owner at occupancy as specified in Section 10- 103(b).
Certificate of Acceptance. For all nonresidential buildings, high-rise residential buildings, and hotels and motels, when designated to allow use of an occupancy group or type regulated by Part 6 the person in charge of the acceptance testing, who is eligible under Division 3 of the Business and Professions Code to accept responsibility for the applicable scope of system design, or construction, or installation of features, materials, components, or manufactured devices regulated by Part 6 or the Appliance Efficiency Regulations (responsible person), shall sign and submit all applicable Certificate of Acceptance documentation in accordance with Section 10-103(a)4 and Reference Nonresidential Appendix NA7 to certify conformance with Part 6. If more than one person has responsibility for the acceptance testing, each person shall sign and submit the Certificate of Acceptance documentation applicable to the portion of the construction or installation, for which they are responsible; alternatively, the person with chief responsibility for the system design, construction or installation, shall sign and submit the Certificate of Acceptance documentation for the entire construction or installation scope of work for the project. Subject to the requirements of Section 10-103(a)4, persons who prepare Certificate of Acceptance documentation (documentation authors) shall sign a declaration statement on the documents they prepare to certify the information provided on the documentation is accurate and complete. Persons who perform acceptance test procedures in accordance with the specifications in Reference Nonresidential Appendix NA7, and report the results of the acceptance tests on the Certificate of Acceptance (field technicians) shall sign a declaration statement on the documents they submit to certify the information provided on the documentation is true and correct. In accordance with applicable requirements of Section 10-103(a)4, the signatures provided by responsible persons, field technicians, and documentation authors shall be original signatures on paper documents or electronic signatures on electronic documents conforming to the electronic signature specifications in Reference Joint Appendix JA7.
All Certificate of Acceptance documentation shall conform to a format and informational order and content approved by the Energy Commission.
These documents shall:
Identify the features, materials, components, manufactured devices, and system performance diagnostic results required to demonstrate compliance with the acceptance requirements to which the applicant must conform as indicated in the plans and specifications submitted under Section 10-103(a)2, and as specified in Reference Nonresidential Appendix NA7.
State the number of the building permit under which the construction or installation was performed.
Display the unique registration number assigned by the data registry if Section 10-103(a)4 requires the document to be registered.
Include a declaration statement indicating that the features, materials, components or manufactured devices identified on the Certificate of Acceptance conform to the applicable acceptance requirements as indicated in the plans and specifications submitted under Section 10- 103(a), and with applicable acceptance requirements and procedures specified in the Reference Nonresidential Appendix NA7, and confirms that Certificate(s) of Installation described in Section 10-103(a)3 has been completed and is posted or made available with the building permit(s) issued for the building, or made available for viewing on an approved data registry.
Be signed by the documentation author to certify the documentation is accurate and complete. When document registration is required by Section 10-103(a)4, the signature shall be an electronic signature on an electronic document in accordance with the electronic signature specifications in Reference Joint Appendix JA7.
Be signed by the field technician who performed the acceptance test procedures and reported the results on the Certificate of Acceptance. When document registration is required by Section

10-103(a)4, the signature shall be an electronic signature on an electronic document in accordance with the electronic signature specifications in Reference Joint Appendix JA7.
Be signed by the responsible person in charge of the acceptance testing who is eligible under Division 3 of the Business and Professions Code to accept responsibility for the system design, construction or installation in the applicable classification for the scope of work identified on the Certificate of Acceptance, or shall be signed by their authorized representative. When document registration is required by Section 10-103(a)4, the signature shall be an electronic signature on an electronic document in accordance with the electronic signature specifications in Reference Joint Appendix JA7.
Contingent upon approval of data registry(s) by the Commission, for all nonresidential buildings, high- rise residential buildings, and hotels and motels, when designated to allow use of an occupancy group or type regulated by Part 6 the person(s) responsible for the Certificate(s) of Acceptance shall submit the Certificate(s) and their associated Compliance Registration Packages for registration and retention to a data registry approved by the Commission, excluding all Certificates of Acceptance recorded by an acceptance test technician certification provider (10-103.1 and 10-103.2). The submittals to the approved data registry shall be made electronically in accordance with the specifications in Reference Joint Appendix JA7.
Contingent upon availability and approval of an electronic document repository by the Executive Director, Certificate of Acceptance documents and their associated Compliance Registration Packages that are registered and retained by an approved data registry shall also be automatically transmitted by the data registry, to an electronic document repository for retention in accordance with the specifications in Reference Joint Appendix JA7.
A copy of the Certificate(s) of Acceptance shall be posted, or made available with the building permit(s) issued for the building, and shall be made available to the enforcement agency for all applicable inspections. If construction on any portion of the building subject to Part 6 will be impossible to inspect because of subsequent construction, the enforcement agency may require the Certificate(s) of Acceptance to be posted upon completion of that portion. A copy of the Certificate(s) of Acceptance shall be included with the documentation the builder provides to the building owner at occupancy as specified in Section 10-103(b).
Certificate of Field Verification and Diagnostic Testing (Certificate of Verification). For all buildings for which compliance requires HERS field verification, a certified HERS Rater shall conduct all required HERS field verification and diagnostic testing in accordance with applicable procedures specified in Reference Appendices RA2, RA3, NA1, and NA2. All applicable Certificate of Verification documentation shall be completed, signed, and submitted by the certified HERS Rater who performed the field verification and diagnostic testing services (responsible person) in accordance with the requirements of Section 10-103(a)5, and Reference Appendices RA2, and NA1, to certify conformance with Part 6. If more than one rater has responsibility for the HERS verification for the building, each rater shall sign and submit the Certificate of Verification documentation applicable to the portion of the building for which they are responsible. Subject to the requirements of Section 10-103(a)5, persons who prepare Certificate of Verification documentation (documentation authors) shall sign a declaration statement on the documents they prepare to certify the information provided on the documentation is accurate and complete. The signatures provided by responsible persons and documentation authors shall be electronic signatures on electronic documents.
Format. All Certificate of Verification documentation shall conform to a format and informational order and content approved by the Energy Commission.
These documents shall:
Identify the installed features, materials, components, manufactured devices, or system performance diagnostic results that require HERS verification for compliance with Part 6 as specified on the Certificate(s) of Compliance for the building.

State the number of the building permit under which the construction or installation was performed,
Display the unique registration number assigned by the HERS provider data registry, and provide any additional information required by Reference Appendices RA2, RA3, NA1, and NA2.
Include a declaration statement indicating that the installed features, materials, components or manufactured devices requiring HERS verification conform to the applicable requirements in Reference Appendices RA2, RA3, NA1, NA2, and the requirements specified on the Certificate(s) of Compliance approved by the local enforcement agency, and confirms the same features, materials, components or manufactured devices are identified on the applicable Certificate(s) of Installation signed and submitted by the person(s) responsible for the construction or installation as described in Section 10-103(a)3.
Be signed by the documentation author to certify the documentation is accurate and complete. The signatures shall be electronic signatures on electronic documents in accordance with the electronic signature specifications in Reference Joint Appendix JA7.
Be signed by the HERS Rater who performed the field verification and diagnostic testing services (responsible person). The signatures shall be electronic signatures on electronic documents in accordance with the electronic signature specifications in Reference Joint Appendix JA7.
For all buildings for which compliance requires HERS field verification, the certified HERS Rater responsible for the Certificate(s) of Verification shall submit the Certificates and their associated Compliance Registration Packages for registration and retention to a HERS provider data registry in accordance with the applicable procedures in Reference Appendices RA2 and NA1, and in compliance with Title 20, Chapter 4, Article 8, Section 1670 et seq.
The submittals to the HERS provider data registry shall be made electronically in accordance with the specifications in Reference Joint Appendix JA7.
Contingent upon availability and approval of an electronic document repository by the Executive Director, Certificate of Verification documents and their associated Compliance Registration Packages that are registered and retained by a HERS provider data registry in accordance with Title 20, Chapter 4, Article 8, Section 1670 et. seq shall also be automatically transmitted by the data registry, to an electronic document repository for retention in accordance with the specifications in Reference Joint Appendix JA7.
Availability. For all buildings, a copy of the registered Certificate(s) of Verification shall be posted, or made available with the building permit(s) issued for the building, or made available for viewing on an approved data registry, and shall be made available to the enforcement agency for all applicable inspections. If construction on any portion of the building subject to Part 6 will be impossible to inspect because of subsequent construction, the enforcement agency may require the Certificate(s) of Verification to be posted upon completion of that portion. A copy of the registered Certificate(s) of Verification shall be included with the documentation the builder provides to the building owner at occupancy as specified in Section 10-103(b).
EXCEPTION to Section 10-103(a): Enforcing agencies may exempt nonresidential buildings that have no more than 1,000 square feet of conditioned floor area in the entire building and an occupant load of 49 persons or less from the documentation requirements of Section 10-103(a), provided a statement of compliance with Part 6 is submitted and signed by a licensed engineer or the licensed architect with chief responsibility for the design.
Compliance, Operating, Maintenance, and Ventilation Information to be provided by Builder.
Compliance information.
For low-rise residential buildings, at final inspection, the enforcement agency shall require the builder to leave in the building, copies of the completed, signed, and submitted compliance documents for

the building owner at occupancy. For low-rise residential buildings, such information shall, at a minimum, include copies of all Certificate of Compliance, Certificate of Installation, and Certificate of Verification documentation submitted. These documents shall be in paper or electronic format and shall conform to the applicable requirements of Section 10-103(a).
For nonresidential buildings, high-rise residential buildings and hotels and motels, at final inspection, the enforcement agency shall require the builder to leave in the building, copies of the completed, signed, and submitted compliance documents for the building owner at occupancy. For nonresidential buildings, high-rise residential buildings and hotels and motels, such information shall include copies of all Certificate of Compliance, Certificate of Installation, Certificate of Acceptance and Certificate of Verification documentation submitted. These documents shall be in paper or electronic format and shall conform to the applicable requirements of Section 10-103(a).
Operating information. At final inspection, the enforcement agency shall require the builder to leave in the building, for the building owner at occupancy, operating information for all applicable features, materials, components, and mechanical devices installed in the building. Operating information shall include instructions on how to operate the features, materials, components, and mechanical devices correctly and efficiently. The instructions shall be consistent with specifications set forth by the Executive Director. For low-rise residential buildings, such information shall be contained in a folder or manual which provides all information specified in Section 10-103(b). This operating information shall be in paper or electronic format.
For dwelling units, buildings or tenant spaces that are not individually owned and operated, or are centrally operated, such information shall be provided to the person(s) responsible for operating the feature, material, component or mechanical device installed in the building. This operating information shall be in paper or electronic format.
Maintenance information. At final inspection, the enforcement agency shall require the builder to leave in the building, for the building owner at occupancy, maintenance information for all features, materials, components, and manufactured devices that require routine maintenance for efficient operation. Required routine maintenance actions shall be clearly stated and incorporated on a readily accessible label. The label may be limited to identifying, by title and/or publication number, the operation and maintenance manual for that particular model and type of feature, material, component or manufactured device. For low-rise residential buildings, this information shall include a schedule of all interior luminaires and lamps installed to comply with Section 150.0(k).
For dwelling units, buildings or tenant spaces that are not individually owned and operated, or are centrally operated, such information shall be provided to the person(s) responsible for maintaining the feature, material, component or mechanical device installed in the building. This information shall be in paper or electronic format.
Ventilation information.
For low-rise and high-rise residential buildings, the enforcement agency shall require the builder to leave the following information in the building, for the building owner at occupancy:
	A description of the quantities of outdoor air that the whole-dwelling unit ventilation system(s) are designed to provide to the building’s conditioned space, and instructions for proper operation and maintenance of the ventilation system.
Instructions for proper operation and maintenance of local exhaust systems, including instructions for conditions for which any occupant-controlled systems such as kitchen range hoods and bathroom exhaust fans should be used.
For systems in buildings or tenant spaces that are not individually owned and operated by the dwelling unit occupants, the building’s owner or their representative shall provide a copy of the ventilation system information to dwelling occupants at the beginning of their occupancy. For systems in buildings or tenant spaces that are centrally operated, all applicable ventilation system

information shall be provided to the person(s) responsible for operating and maintaining the feature, material, component or mechanical ventilation device installed in the building. This information shall be in paper or electronic format.
For nonresidential buildings, hotels, and motels, the enforcement agency shall require the builder to provide the building owner at occupancy a description of the quantities of outdoor and recirculated air that the ventilation systems are designed to provide to each area. For buildings or tenant spaces that are not individually owned and operated, or are centrally operated, such information shall be provided to the person(s) responsible for operating and maintaining the feature, material, component or mechanical device installed in the building. This information shall be in paper or electronic format.
Equipment Information to be Provided by Manufacturer or Supplier. The manufacturer or supplier of any manufactured device shall, upon request, provide to building designers and installers information about the device. The information shall include the efficiency (and other characteristics regulated by Part 6). This information shall be in paper or electronic format.
Enforcement Agency Requirements.
Permits. An enforcement agency shall not issue a building permit for any construction unless the enforcement agency determines in writing that the construction is designed to comply with the requirements of Part 6 that are in effect on the date the building permit was applied for. The enforcement agency determination shall confirm that the documentation requirements of Sections 10-103(a)1 and 10- 103(a)2 have been met.
If a building permit has been previously issued, there has been no construction under the permit, and the permit has expired, the enforcement agency shall not issue a new permit unless the enforcement agency determines in writing that the construction is designed to comply with the requirements of Part 6 in effect on the date the new permit is applied for. The enforcement agency determination shall confirm that the documentation requirements of Sections 10-103(a)1 and 10-103(a)2 have been met.
“Determines in writing” includes, but is not limited to, approval of a building permit with a stamp normally used by the enforcement agency.
Inspection. The enforcement agency shall inspect newly constructed buildings and additions, and alterations to existing buildings to determine whether the construction or installation is consistent with the agency's approved plans and specifications, and complies with Part 6. Final certificate of occupancy shall not be issued until such consistency and compliance is verified. For Occupancy Group R-3, final inspection shall not be complete until such consistency and compliance is verified.
Such verification shall include determination that:
All installed features, materials, components or manufactured devices, regulated by the Appliance Efficiency Regulations or Part 6 are indicated, when applicable, on the Certificate(s) of Installation, Certificate(s) of Acceptance and Certificate(s) of Verification, and are consistent with such features, materials, components or manufactured devices given in the plans and specifications and the Certificate(s) of Compliance approved by the local enforcement agency.
All required Certificates of Installation are posted, or made available with the building permit(s) issued for the building, or made available for viewing on an approved data registry, and are made available to the enforcement agency for all applicable inspections, and that all required Certificates of Installation conform to the specifications of Section 10-103(a)3.
All required Certificates of Acceptance are posted, or made available with the building permit(s) issued for the building, and are made available to the enforcement agency for all applicable inspections, and that all required Certificates of Acceptance conform to the specifications of Section 10-103(a)4.
All required Certificates of Verification are posted, or made available with the building permit(s) issued for the building, or made available for viewing on an approved data registry, and are made

available to the enforcement agency for all applicable inspections, and that all required Certificates of Verification conform to the specifications of Section 10-103(a)5.
NOTE: Authority: Section 25402, 25402.1, Public Resources Code. Reference: Section 25402, Public Resources Code.

10-103.1 – NONRESIDENTIAL LIGHTING CONTROLS ACCEPTANCE TEST TRAINING AND CERTIFICATION
Scope. The requirements of this section apply to Acceptance Test Technicians (ATTs), Acceptance Test Employers (ATEs), and Acceptance Test Technician Certification Providers (ATTCPs) that perform work relating to the acceptance testing of nonresidential lighting systems and controls.
Industry Certification Threshold. ATT and ATE certification requirements shall take effect when the Energy Commission finds that each of the following conditions are met. Until such time that Sections 10-103.1(b)1 and 10-103.1(b)2 are met, or if, subsequent to being met, they cease to be maintained, Field Technicians may complete acceptance testing as specified in Part 6, Section 130.4 and 160.5(e) without meeting the certification requirements specified in Part 1, Section 10-103.1.
Number of Certified ATTs. There shall be no less than 300 ATTs certified to perform the lighting acceptance tests in Building Energy Efficiency Standards, Section 130.4 and 160.5(e). The number of certified ATTs shall be submitted to the Energy Commission in the annual reports prepared by ATTCPs, as specified in Section 10-103.1(d)1.
Industry Coverage by ATTCPs. ATTCPs approved by the Energy Commission, in their entirety, shall provide reasonable access to certification to the following industry groups: electrical contractors, certified general electricians, licensed architects, professional engineers, controls installation and startup contractors and certified commissioning professionals who have verifiable training, experience and expertise in lighting controls and electrical systems. The Energy Commission will determine whether reasonable access to certification is provided by considering factors such as certification costs commensurate with the complexity of the training being provided, certification marketing materials, prequalification criteria, class location and availability, and curriculum.
Qualifications and Approval of ATTCPs. ATTCPs shall submit a written application to the Energy Commission with a summary and the related background documents to explain how the following criteria and procedures have been met:
Organizational Structure. ATTCPs shall provide written explanations of the organization type, by-laws, and ownership structure. ATTCPs shall explain in writing how their certification program meets the qualification requirements of Title 24, Part 1, Section 10-103.1(c). ATTCPs shall explain in their application to the Energy Commission their organizational structure and their procedures for independent oversight, quality assurance, supervision and support of the acceptance test training and certification processes.
Certification of ATEs. The ATTCPs shall provide written explanations of their certification and oversight of ATEs. This explanation shall document how the ATTCP ensures that ATEs are providing quality control and appropriate supervision and support for their ATTs.
Recertification. The ATTCP shall recertify all ATEs prior to the implementation of each adopted update to the Building Energy Efficiency Standards as these updates affect the acceptance test requirements. Recertification requirements and procedures shall only apply to those specific elements that are new or modified in future updates to Building Energy Efficiency Standards.
Training and Certification Procedures. ATTCPs shall include with their application a complete copy of all training and testing procedures, manuals, handbooks and materials. ATTCPs shall explain in writing how their training and certification procedures include, but are not limited to, the following:

Training Scope. The scope of the training shall include both hands-on experience and theoretical training to certify competency in the technologies and skills necessary to perform the acceptance tests.

ATT Training.
Curricula. ATTCP training curricula for ATTs shall include, but not be limited to, the analysis, theory, and practical application of the following:
Lamp and ballast systems;
Line voltage switching controls;
Low voltage switching controls;
Dimming controls;
Occupancy sensors;
Photosensors;
Demand responsive signal inputs to lighting control systems;
Building Energy Efficiency Standards required lighting control systems;
Building Energy Efficiency Standards required lighting control system-specific analytical/problem solving skills;
Integration of mechanical and electrical systems for Building Energy Efficiency Standards required lighting control installation and commissioning;
Safety procedures for low-voltage retrofits (<50 volts) to control line voltage systems (120 to 480 volts);
Accurate and effective tuning, calibration, and programming of Building Energy Efficiency Standards required lighting control systems;
Measurement of illuminance according to the Illuminating Engineering Society’s measurement procedures as provided in the IES Lighting Handbook, 10th Edition, 2011;
Building Energy Efficiency Standards lighting controls acceptance testing procedures; and
Building Energy Efficiency Standards acceptance testing compliance documentation for lighting controls.
Hands-on training. The ATTCP shall describe in its application the design and technical specifications of the laboratory boards, equipment and other elements that will be used to meet the hands-on requirements of the training and certification.
Prequalification. Participation in the certification program shall be limited to persons who have at least three years of professional experience and expertise in lighting controls and electrical systems as determined by the Lighting Controls ATTCPs.
NOTE: ATTCPs may specify additional qualifications for participation in their programs, such as limiting participation to persons that are not currently listed as “decertified” by another ATTCP.
Instructor to Trainee Ratio. The ATTCP shall document in its application to the Energy Commission why its instructor to trainee ratio is sufficient to ensure the integrity and efficacy of the curriculum and program based on industry standards and other relevant information.
Tests. The ATTCP shall describe the written and practical tests used to demonstrate each certification applicant’s competence in all specified subjects. The ATTCPs shall retain all results of these tests for five years from the date of the test.

Recertification. The ATTCP shall recertify all ATTs prior to the implementation of each adopted update to the Building Energy Efficiency Standards when these updates affect the acceptance test requirements. Recertification requirements and procedures shall only apply to those specific elements that are new or modified in future updates to Building Energy Efficiency Standards. The ATTCP shall develop recertification training curricula for ATTs consistent with training requirements in Sections 10-103.1(c)3A and 10-103.1(c)3B, and shall submit the proposed recertification training curricula to the Energy Commission for review and approval in the update report required under Section 10-103.1(d)2.
ATE Training. Training for ATEs shall consist of a single class or webinar consisting of at least four hours of instruction that covers the scope and process of the acceptance tests in Building Energy Efficiency Standards, Section 130.4 and 160.5(e).
Complaint Procedures. The ATTCP shall describe in its applications to the Energy Commission procedures for accepting and addressing complaints regarding the performance of any ATT or ATE certified by the ATTCP, and explain how building departments and the public will be notified of these proceedings.
Decertification Procedures. The ATTCP shall describe in its applications to the Energy Commission procedures for revoking their certification of ATTs and ATEs based upon poor quality or ineffective work, failure to perform acceptance tests, falsification of documents, failure to comply with the documentation requirements of these regulations or other specified actions that justify decertification. The ATTCP shall also describe its general procedures for decertified ATTs or ATEs seeking to regain their certification status, including eligibility requirements for recertification (if any).
Quality Assurance and Accountability. The ATTCP shall describe in its application to the Energy Commission its procedures for conducting quality assurance and accountability activities, including but not limited to the following:
The ATTCP shall include quality assurance and accountability measures, including but not limited to independent oversight of the certification materials, processes and procedures, visits to building sites where certified technicians are completing acceptance tests, certification process evaluations, building department surveys to determine acceptance testing effectiveness, and expert review of the training curricula developed for Building Energy Efficiency Standards, Section 130.4 and 160.5(e).
The ATTCP shall review a random sample of no less than 1 percent of each ATT’s completed compliance forms, and shall perform randomly selected on-site audits of no less than 1 percent of each ATT’s completed acceptance tests. Independent oversight may be demonstrated by accreditation under the ISO/IEC 17024 standard.
Certification Identification Number and Verification of ATT and ATE Certification Status. The ATTCP shall describe in its application to the Energy Commission its procedures for recording, tracking, and communicating certification status, including but not limited to the following:
Upon certification of an ATT or ATE, the ATTCP shall issue a unique certification identification number to the ATT or ATE.
The ATTCP shall maintain an accurate public record of the certification status for all ATTs and ATEs that the ATTCP has certified, including any ATTs or ATEs who have been decertified as specified in Section 10-103.1(c)3E.
The ATTCP shall provide verification of current ATT certification status upon request to authorized document Registration Provider personnel or enforcement agency personnel to determine the ATT's eligibility to sign Certificate of Acceptance documentation according to all applicable requirements in Sections 10-103.1, 10-102, 10-103(a)4, and the Reference Joint Appendix JA7.

Electronic Database System. The ATTCP shall maintain, or by suitable contractual requirements cause to be maintained, an electronic database system approved by the Energy Commission. The electronic database system shall be capable of all the following:
Support all activities for the ATTCP to comply with its quality assurance program as required by Section 10-103.1(c)3F.
For no less than five years, record and preserve all certificates of acceptance offered for certification by the ATTCP and as performed by its own certified ATTs.
Allow the transmission of electronic copies of each completed certificate of acceptance to the ATT that performed the test, the ATE associated with that ATT, or both.
Each page of each certificate of acceptance shall bear the logo of the ATTCP or other identifying insignia as approved by the Energy Commission.
The electronic copy shall be capable of being printed.
The ATTCP may apply to the Energy Commission for approval to use alternative compliance documents that differ from those approved for use by the Energy Commission but must demonstrate that these alternative compliance documents do not differ in format, informational order, or content from approved compliance documents.
Provide a means of verifying any certificate of acceptance to the enforcement agency having jurisdiction as identified on the certificate of acceptance.
Provide the Energy Commission with any of the following project data or documents upon request: project address, permit numbers, acceptance test technician and acceptance test employee certification numbers, certificates of acceptance, compliance forms, installation forms, and record of quality assurance review. The Energy Commission may adopt an Application Programming Interface (API) for providing data electronically. Within one year of development of an API, the ATTCP’s electronic database system shall have the ability to transfer project data to the Energy Commission through the API upon completion of the project or at established intervals no longer than monthly.
Compliance Document Recording and Repository Reporting Requirement:
The ATTCP shall record all certificates of compliance (Section 10-103(a)1), certificates of installation (Section 10-103(a)3), and certificates of acceptance (Section 10-103(a)4) associated with any acceptance test specified in Part 6, Section 130.4 and 160.5(e).
Contingent upon Energy Commission approval of the threshold (Section 10-103.1(b)) and upon availability and approval of an electronic document repository by the Executive Director, the ATTCP shall submit monthly data transfer packets to the Energy Commission to an electronic document repository for retention consistent with Energy Commission instructions.
Requirements for ATTCPs to Provide Regular Reports. The ATTCP shall provide the following regular reports to the Energy Commission:
Annual Report. The ATTCP shall provide an annual report to the Energy Commission that includes the following:
A summary of the certification services provided over the reporting period, including the total number of Acceptance Test Technicians and Employers certified by the ATTCP during the reporting period and to date.
A summary of all actions taken against any ATT or ATE as a result of the complaint or quality assurance procedures described by the ATTCP as required under Section 10-103.1(c)3D and 10- 103.1(c)3F.

A summary of the quality assurance and accountability activities conducted over the reporting period, including the compliance forms reviewed and the on-site audits performed as required under Section 10-103.1(c)3Fii during the reporting period and to date.
A summary of the number and type of acceptance tests performed in each local jurisdiction over the reporting period and to date.
A signed certification to the Energy Commission that the ATTCP continues to meet the requirements of Section 10-103.1.
Update Report. The ATTCP shall have no less than six months following the adoption of an update to the Building Energy Efficiency Standards to prepare an Update Report. The ATTCP shall submit an Update Report to the Energy Commission no less than six months prior to the effective date of any newly adopted update to the Building Energy Efficiency Standards. The ATTCP shall report to the Energy Commission what application amendments are proposed, to address changes to the Building Energy Efficiency Standards or to ensure training is reflective of the variety of lighting controls that are currently encountered in the field. All required update reports shall contain a signed certification that the ATTCP continues to meet the requirements of Section 10-103.1. Update reports shall be approved through the Amendment Process provided under Section 10-103.1(f).
All required reports shall contain a signed certification that the ATTCP has met all requirements for this program.
Application Review and Determination. The Energy Commission shall review ATTCP applications according to the criteria and procedures in Section 10-103.1(c) to determine if such providers meet the specified requirements for providing acceptance testing certification services.
Energy Commission staff will review and validate all information received on ATTCP applications, and determine whether the application is complete and contains sufficient information to be evaluated by staff. Complete applications shall be evaluated by staff based on their contents.
The Executive Director may require that the applicant provide additional information as required by staff to fully evaluate the ATTCP application.
The Executive Director shall provide a copy of the staff evaluation to interested persons and provide a reasonable opportunity for public comment.
The Executive Director shall issue a written recommendation that the Energy Commission designate the applicant as an authorized ATTCP or deny the application.
The Energy Commission shall make a final decision on the application at a publicly noticed hearing.
Amendment Process.
The ATTCP may amend a submitted or approved application, as follows:
Amendment Scope.
Nonsubstantive Changes. A nonsubstantive change is a change that does not substantively alter the requirements of the application materials for the ATTCP, ATT, or ATE. For amendments making only nonsubstantive changes, the ATTCP shall submit the following:
A letter describing the change to the Energy Commission as an addendum to the application;
A replacement copy of the affected sections of the ATTCP application with the changes incorporated; and
A copy of the affected sections of the ATTCP application showing the changes in underline and strikeout format.
Substantive Changes. A substantive change is a change that substantively alters the requirements of the application materials for the ATTCP, ATT, or ATE. For amendments making any substantive changes, the ATTCP shall submit the following:

A document describing the scope of the change to the application, the reason for the change and the potential impact to the ATTCP, ATT, and ATE as an addendum to the application;
A replacement copy of the affected sections of the ATTCP application with the changes incorporated; and
A copy of the affected sections of the ATTCP application showing the changes in underline and strikeout format.
Amendment Review. Amendments submitted prior to approval of an ATTCP application shall be included in the application’s Application Review and Determination process specified in Section 10-103.1(e).
Amendments submitted after approval of an ATTCP’s application that contain only nonsubstantive changes shall be reviewed by the Executive Director for consistency with Section 10-103.1. Amendments determined to be consistent with this Section shall be incorporated into the approval as errata.
Amendments submitted after approval of an ATTCP’s application that contain any substantive changes shall be subject to the Application Review and Determination process specified in Section 10-103.1(e). If the Energy Commission finds that the amended application does not meet the requirements of Section 10- 103.1, then the ATTCP shall either abide by the terms of their previously approved application or have their approval suspended.
Review by the Energy Commission.
If the Energy Commission determines there is a violation of these regulations or that an ATTCP is no longer providing adequate certification services, the Energy Commission may revoke the authorization of the ATTCP pursuant to Section 1230 et seq. of Title 20 of the California Code of Regulations.

NOTE: Authority: Sections 25402, 25402.1, 25213, Public Resources Code. Reference: Sections 25007, 25008,
25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8 and 25943, Public Resources Code.

10-103.2 – NONRESIDENTIAL MECHANICAL ACCEPTANCE TEST TRAINING AND CERTIFICATION
Scope. The requirements of this section apply to Acceptance Test Technicians (ATTs), Acceptance Test Employers (ATEs), and Acceptance Test Technician Certification Providers (ATTCPs) that perform work relating to the acceptance testing of nonresidential mechanical systems and controls.
Industry Certification Threshold. ATT and ATE certification requirements shall take effect when the Energy Commission finds that each of the following conditions are met. Until such time that Sections 10-103.2(b)1 and 10-103.2(b)2 are met, or if, subsequent to being met, they cease to be maintained, Field Technicians may complete acceptance testing as specified in Section 120.5 and 160.3(d) without completing certification requirements specified in Part 1, Section 10-103.2.
Number of Certified ATTs.
There shall be no less than 300 ATTs certified to perform the complete set of mechanical acceptance tests in Building Energy Efficiency Standards, Section 120.5 and 160.3(d), except as provided in Subsection 10-103.2(b)1B. The number of certified ATTs shall be submitted to the Energy Commission in the annual reports prepared by ATTCPs, as specified in Section 10-103.2(d)1.
If there are less than 300 ATTs certified to perform all of the acceptance tests in Building Energy Efficiency Standards, Section 120.5 and 160.3(d), then there shall be at least 300 ATTs certified to complete the following tests:
NA7.5.1 Outdoor Air Ventilation Systems
NA7.5.2 Constant Volume, Single Zone Unitary Air Conditioners and Heat Pumps
NA7.5.4 Air Economizer Controls
NA7.5.5 Demand Control Ventilation Systems
NA 7.5.6 Supply Fan Variable Flow Controls
NA7.5.7, NA7.5.9 Hydronic System Variable Flow Controls
NA7.5.10 Automatic Demand Shed Controls
Industry Coverage by ATTCPs. ATTCPs approved by the Energy Commission, in their entirety, provide reasonable access to certification to the following industry groups: Professional engineers, licensed architects, HVAC installers, mechanical contractors, Testing and Balancing (TAB) certified technicians, controls installation and startup contractors and certified commissioning professionals who have verifiable training, experience and expertise in HVAC systems. The Energy Commission will determine reasonable access by considering factors such as certification costs commensurate with the complexity of the training being provided, certification marketing materials, prequalification criteria, class availability and curriculum.
Qualifications and Approval of ATTCPs. ATTCPs shall submit a written application to the Energy Commission with a summary and the necessary background documents to explain how the following criteria and procedures have been met:
Organizational Structure. ATTCPs shall provide written explanations of the organization type, by-laws, and ownership structure. ATTCPs shall explain in writing how their certification program meets the qualifications of Building Energy Efficiency Standards, Section 10-103.2(c). ATTCPs shall explain in their application to the Energy Commission their organizational structure and their procedures for independent oversight, quality assurance, supervision and support of the acceptance test training and certification processes.
Certification of ATEs. The ATTCPs shall provide written explanations of their certification and oversight of ATEs. This explanation shall document how the ATTCP ensures that ATEs are providing quality control and appropriate supervision and support for their ATTs.

A. Recertification. The ATTCP shall recertify all ATEs prior to the implementation of each adopted update to the Building Energy Efficiency Standards as these updates affect the acceptance test requirements. Recertification requirements and procedures shall only apply to those specific elements that are new or modified in future updates to Building Energy Efficiency Standards.
Requirements for Applicant ATTCPs to Document Training and Certification Procedures. ATTCPs shall include with their application a complete copy of all training and testing procedures, manuals, handbooks and materials. ATTCPs shall explain in writing how their training and certification procedures include, but are not limited to, the following:
Training Scope. The scope of the training shall include both hands-on experience and theoretical training to certify competency in the technologies and skills necessary to perform the acceptance tests.
ATT Training.
Curricula. ATTCP training curricula for ATTs shall include, but not be limited to, the analysis, theory, and practical application of the following:
Constant volume system controls;
Variable volume system controls;
Air-side economizers;
Air distribution system leakage;
Demand controlled ventilation with CO2 sensors;
Demand controlled ventilation with occupancy sensors;
Automatic demand shed controls;
Hydronic valve leakage;
Hydronic system variable flow controls;
Supply air temperature reset controls;
Condenser water temperature reset controls;
Outdoor air ventilation systems;
Supply fan variable flow controls;
Boiler and chiller isolation controls;
Fault detection and diagnostics for packaged direct-expansion units;
Automatic fault detection and diagnostics for air handling units and zone terminal units;
Distributed energy storage direct-expansion air conditioning systems;
Thermal energy storage systems;
Building Energy Efficiency Standards mechanical acceptance testing procedures; and
Building Energy Efficiency Standards acceptance testing compliance documentation for mechanical systems.
Hands-on training. The ATTCP shall describe in its application the design and technical specifications of the laboratory boards, equipment and other elements that will be used to meet the hands-on requirements of the training and certification.
Prequalification. Participation in the certification program shall be limited to persons who have at least three years of professional experience and expertise in mechanical controls and systems as determined by the Mechanical ATTCPs.

NOTE: ATTCPs may specify additional qualifications for participation in their programs, such as limiting participation to persons that are not currently listed as “decertified” by another ATTCP.
Instructor to Trainee Ratio. The ATTCP shall document in its application to the Energy Commission why its instructor to trainee ratio is sufficient to ensure the integrity and efficacy of the curriculum and program based on industry standards and other relevant information.
Tests. The ATTCP shall describe the written and practical tests used to demonstrate each certification applicant’s competence in all specified subjects. The ATTCPs shall retain all results of these tests for five years from the date of the test.
Recertification. The ATTCP shall recertify all ATTs prior to the implementation of each adopted update to the Building Energy Efficiency Standards as these updates affect the acceptance test requirements. Recertification requirements and procedures shall only apply to those specific elements that are new or modified in future updates to Building Energy Efficiency Standards.
ATE Training. Training for ATEs shall consist of a single class or webinar consisting of at least four hours of instruction that covers the scope and process of the acceptance tests in Building Energy Efficiency Standards, Section 120.5 and 160.3(d).
Complaint Procedures. Procedures described in writing for notifying building departments and the public that the ATTCP will accept complaints regarding the performance of any certified ATT or ATE, and procedures for how the ATTCP will address these complaints.
Decertification Procedures. The ATTCP shall describe in its application to the Energy Commission procedures for revoking their certification of ATTs and ATEs based upon poor quality or ineffective work, failure to perform acceptance tests, falsification of documents, failure to comply with the documentation requirements of these regulations or other specified actions that justify decertification. The ATTCP shall also describe its general procedures for decertified ATTs or ATEs seeking to regain their certification status, including eligibility requirements for recertification (if any).
Quality Assurance and Accountability. The ATTCP shall describe in its applications to the Energy Commission procedures for conducting quality assurance and accountability activities, including but not limited to the following:
The ATTCPs shall include quality assurance and accountability measures, including but not limited to independent oversight of the certification materials, processes and procedures, visits to building sites where certified technicians are completing acceptance tests, certification process evaluations, building department surveys to determine acceptance testing effectiveness, and expert review of the training curricula developed for Building Energy Efficiency Standards, Section 120.5 and 160.3(d).
The ATTCP shall review a random sample of no less than 1 percent of each ATT’s completed compliance forms. The ATTCP shall also randomly select and shadow audit no less than 1 percent of each ATE’s overseen projects, following the assigned ATT and observing their performance on the job site. Independent oversight may be demonstrated by accreditation under the ISO/IEC 17024 standard.
Certification Identification Number and Verification of ATT and ATE Certification Status. The ATTCP shall describe in its applications to the Energy Commission procedures for recording, tracking, and communicating certification status, including but not limited to the following:
Upon certification of an ATT or ATE, the ATTCP shall issue a unique certification identification number to the ATT or ATE.

The ATTCP shall maintain an accurate public record of the certification status for all ATTs and ATEs that the ATTCP has certified, including any ATTs or ATEs who have been decertified as specified in 10-103.2(c)3E.
The ATTCP shall provide verification of current ATT certification status upon request to authorized document Registration Provider personnel or enforcement agency personnel to determine the ATT's eligibility to sign Certificate of Acceptance documentation according to all applicable requirements in Sections 10-103.2, 10-102, 10-103(a)4, and Reference Joint Appendix JA7.
Electronic Database System. The ATTCP shall maintain, or by suitable contractual requirements cause to be maintained, an electronic database system approved by the Energy Commission. The electronic database system shall be capable of all the following:
Support all activities for the ATTCP to comply with its quality assurance program as required by Section 10-103.2(c)3F.
For no less than five years, record and preserve all certificates of acceptance offered for certification by the ATTCP and as performed by its own certified ATTs.
Allow the transmission of electronic copies of each completed certificate of acceptance to the ATT that performed the test, the ATE associated with that ATT, or both.
Each page of each certificate of acceptance shall bear the logo of the ATTCP or other identifying insignia as approved by the Energy Commission.
The electronic copy shall be capable of being printed.
The ATTCP may apply to the Energy Commission for approval to use alternative compliance documents that differ from those approved for use by the Energy Commission but must demonstrate that these alternative compliance documents do not differ in format, informational order, or content from approved compliance documents.
Provide a means of verifying any certificate of acceptance to the enforcement agency having jurisdiction as identified on the certificate of acceptance.
Provide the Energy Commission with any of the following project data or documents upon request: project address, permit numbers, acceptance test technician and acceptance test employee certification numbers, certificates of acceptance, compliance forms, installation forms, and record of quality assurance review. The Energy Commission may adopt an Application Programming Interface (API) for providing data electronically. Within one year of development of an API, the ATTCP’s electronic database system shall have the ability to transfer project data to the Energy Commission through the API upon completion of the project or at established intervals no longer than monthly.
Compliance Document Recording and Repository Reporting Requirement:
The ATTCP shall record all certificates of compliance (Section 10-103(a)1), certificates of installation (Section 10-103(a)3), and certificates of acceptance (Section 10-103(a)4) associated with any acceptance test specified in Part 6, Section 120.5 and 160.3(d).
Contingent upon Energy Commission approval of the threshold (Section 10-103.2(b)) and upon availability and approval of an electronic document repository by the Executive Director, the ATTCP shall submit monthly data transfer packets to the Energy Commission to an electronic document repository for retention consistent with Energy Commission instructions.

Requirements for ATTCPs to Provide Regular Reports. The ATTCP shall provide the following regular reports to the Energy Commission:
Annual Report. The ATTCP shall provide an annual report to the Energy Commission that includes the following:
A summary of the certification services provided over the reporting period, including the total number of Acceptance Test Technicians and Employers certified by the agency during the reporting period and to date.
A summary of all actions taken against any ATT or ATE as a result of the complaint or quality assurance procedures described by the ATTCP as required under Section 10-103.2(c)3D and 10- 103.2(c)3F.
A summary of the quality assurance and accountability activities conducted over the reporting period, including the compliance forms reviewed and the on-site audits performed as required under Section 10-103.2(c)3Fii during the reporting period and to date.
A summary of the number and type of acceptance tests performed in each local jurisdiction over the reporting period and to date.
A signed certification to the Energy Commission that the ATTCP continues to meet the requirements of Section 10-103.2.
Update Report. The ATTCP shall have no less than six months following the adoption of an update to the Building Energy Efficiency Standards to prepare an Update Report. The ATTCP shall submit an Update Report to the Energy Commission no less than six months prior to the effective date of any newly adopted update to the Building Energy Efficiency Standards, The ATTCP shall report to the Energy Commission what application amendments are proposed to address changes to the Building Energy Efficiency Standards or to ensure training is reflective of the variety of mechanical equipment and systems currently encountered in the field. All required update reports shall contain a signed certification that the ATTCP continues to meet all the requirements of Section 10-103.2(c). Update reports shall be approved through the Amendment Process provided under Section 10-103.2(f).
All required reports shall contain a signed certification that the ATTCP has met all requirements for this program.
Application Review and Determination. The Energy Commission shall review ATTCP applications according to the criteria and procedures in Section 10-103.2(c) to determine if such providers meet the specified requirements for providing acceptance testing certification services.
Energy Commission staff will review and validate all information received on ATTCP applications, and determine whether the application is complete and contains sufficient information to be evaluated by staff. Complete applications shall be evaluated by staff based on their contents.
The Executive Director may require that the applicant provide additional information as required by staff to fully evaluate the ATTCP application.
The Executive Director shall provide a copy of the staff evaluation to interested persons and provide an opportunity for public comment.
The Executive Director shall issue a written recommendation that the Energy Commission designate the applicant as an authorized ATTCP or deny the Provider application.
The Energy Commission shall make a final decision on the application at a publicly noticed hearing.

Amendment Process.
The ATTCP may amend a submitted or approved application, as follows:
Amendment Scope.
Nonsubstantive Changes. A nonsubstantive change is a change that does not substantively alter the requirements of the application materials for the ATTCP, ATT, or ATE. For amendments making only nonsubstantive changes, the ATTCP shall submit the following:
a letter describing the change to the Energy Commission as an addendum to the application;
A replacement copy of the affected sections of the ATTCP application with the changes incorporated; and
A copy of the affected sections of the ATTCP application showing the changes in underline and strikeout format.
Substantive Changes. A substantive change is a change that substantively alters the requirements of the application materials for the ATTCP, ATT, or ATE. For amendments making any substantive changes, the ATTCP shall submit the following:
A document describing the scope of the change to the application, the reason for the change and the potential impact to the ATTCP, ATT, and ATE as an addendum to the application;
A replacement copy of the affected sections of the ATTCP application with the changes incorporated; and
A copy of the affected sections of the ATTCP application showing the changes in underline and strikeout format.
Amendment Review. Amendments submitted prior to approval of an ATTCP application shall be included in the application’s Application Review and Determination process specified in Section 10-103.2(e).
Amendments submitted after approval of an ATTCP’s application that contain only nonsubstantive changes shall be reviewed by the Executive Director for consistency with Section 10-103.2. Amendments determined to be consistent with this Section shall be incorporated into the approval as errata.
Amendments submitted after approval of an ATTCP’s application that contain any substantive changes shall be subject to the Application Review and Determination process specified in Section 10-103.2(e). If the Energy Commission finds that the amended application does not meet the requirements of Section 10- 103.2, then the ATTCP shall either abide by the terms of their previously approved application or have their approval suspended.
Review by the Energy Commission.
If the Energy Commission determines there is a violation of these regulations or that an ATTCP is no longer providing adequate certification services, the Energy Commission may revoke the authorization of the ATTCP pursuant to Section 1230 et. seq. of Title 20 of the California Code of Regulations.
NOTE: Authority: Sections 25402, 25402.1, 25213, Public Resources Code. Reference: Sections 25007, 25008,
25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8 and 25943, Public Resources Code.

– EXCEPTIONAL DESIGNS
NOTE: See Section 10-109 for approval of calculation methods and Alternative Component Packages.
Requirements. If a building permit applicant proposes to use a performance compliance approach, and the building designs cannot be adequately modeled by an approved calculation method, an applicant shall be granted a building permit if the Commission finds:
That the design cannot be adequately modeled with an approved calculation method;
Using an alternative evaluation technique, that the design complies with Part 6; and
That the enforcement agency has determined that the design complies with all other legal requirements.
Applications. The applicant shall submit four copies of a signed application with the following materials to the Executive Director:
A copy of the plans and documentation required by Section 10-103(a)2;
A statement explaining why meeting the energy budget cannot be demonstrated using an approved calculation method;
Documentation from the enforcement agency stating that:
Meeting the energy budget requirements cannot be demonstrated using an approved calculation method; and
The design complies with all other legal requirements; and
A detailed evaluation of the energy consumption of the proposed building and the building's materials, components, and manufactured devices proposed to be installed to meet the requirements of Part 6 using an alternative evaluation technique. The evaluation shall include a copy of the technique, instructions for its use, a list of all input data, and all other information required to replicate the results.
NOTE: Authority: Sections 25402 and 25402.1, Public Resources Code. Reference: Sections 25007, 25008, 25218.5,
25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8 and 25943, Public Resources Code.

– ENFORCEMENT BY THE COMMISSION
Where there is No Local Enforcement Agency. Before new construction may begin in an area where there is no local enforcement agency, the Executive Director shall determine in writing that the building design conforms to the requirements of Part 6. The person proposing to construct the building shall submit the information described in Sections 10-103(a)1 and 10-103(a)2 to the Executive Director when such a determination is sought.
Where building construction is under the jurisdiction of a State agency. Pursuant to Public Resources Code Section 25402.1(g)(5), no construction of any State building shall commence until the Department of General Services or the State agency that otherwise has jurisdiction over the property determines that the construction is designed to comply with the requirements of Part 6, and confirms that the documentation requirements of Sections 10-103(a)1 and 10-103(a)2 have been met and that the plans indicate the features and performance specifications needed to comply with Part 6. The responsible state agency shall notify the Commission’s Executive Director of its determination.
Where the Enforcement Agency Fails to Enforce. If an enforcement agency fails to enforce the requirements of this article or of Part 6 the Commission, after furnishing 10 days written notice, may condition building permit issuance on submission of the information described in Sections 10-103(a)1 and 10-103(a)2 to the Executive Director and on his or her written determination that proposed construction conforms to the requirements of Part 6.
NOTE: Authority: Code Section 25402.1, Public Resources Code. Reference: Section 25402.1, Public Resources Code.

– LOCALLY ADOPTED ENERGY STANDARDS
Requirements. Local governmental agencies may adopt and enforce energy standards for newly constructed buildings, additions, alterations, and repairs to existing buildings provided the following two requirements are met prior to any enforcement of the standards:
A determination that the standards are cost effective is adopted by the local agency at a public meeting and subsequently filed with the Energy Commission; and
The Energy Commission finds that the standards will require buildings to be designed to consume less energy than permitted by Title 24, Part 6.
Documentation Application. Local governmental agencies wishing to enforce energy standards subject to Section10-106(a) shall submit an application with the following materials to the Executive Director:
The proposed energy standards;
The local governmental agency's findings and supporting analyses on the energy savings and cost effectiveness of the proposed energy standards;
A statement or finding by the local governmental agency that the proposed energy standards will require buildings to be designed to consume less energy than permitted by Part 6; and
Any findings, determinations, declarations or reports, including any negative declaration or environmental impact report, required pursuant to the California Environmental Quality Act, Pub. Resources Code Section 21000 et seq.
NOTE: Authority: Section 25402.1, Public Resources Code. Reference: Sections 25402.1, 21080.4, 21153, Public Resources Code.

– INTERPRETATIONS
The Commission may make a written determination as to the applicability or interpretation of any provision of this article or of Part 6 upon written application, if a dispute concerning a provision arises between an applicant for a building permit and the enforcement agency, and the dispute has been heard by the local board of permit appeals or other highest local review body. Notice of any such appeal, including a summary of the dispute and the section of the regulations involved, shall if possible be sent to the Commission by the enforcing agency 15 days before the appeal is heard, and the result of the appeal shall be sent to the Commission within 15 days after the decision is made. Either party to the dispute may apply for a determination but shall concurrently deliver a copy of the application to the other party. The determinations are binding on the parties.
The Executive Director may, upon request, give written advice concerning the meaning of any provision of this article or of Part 6. Such advice is not binding on any person.
NOTE: Authority: Section 25402.1, Public Resources Code. Reference: Section 25218.5 and 25402.1, Public Resources Code.

– EXEMPTION
Requirements. The Commission may exempt any building from any provision of Part 6 if it finds that:
Substantial funds had been expended in good faith on planning, designing, architecture, or engineering of the building before the adoption date of the provision; and
Compliance with the requirements of the provision would be impossible without both substantial delays and substantial increases in costs of construction above the reasonable costs of the measures required to comply with the provision.
Application. The applicant shall submit four copies of a signed application with the following materials to the Executive Director:
A summary of the claimant's contracts for the project;
A summary of internal financial reports on the project;
Dated schedules of design activities; and
A progress report on project completion.
NOTE: Authority: Section 25402.1, Public Resources Code. Reference: Section 25402.1, Public Resources Code.

– COMPLIANCE SOFTWARE, ALTERNATIVE COMPONENT PACKAGES, EXCEPTIONAL METHODS, DATA REGISTRIES AND RELATED EXTERNAL DIGITAL DATA SOURCES, ALTERNATIVE RESIDENTIAL FIELD VERIFICATION PROTOCOLS, ELECTRONIC DOCUMENT REPOSITORIES, PHOTOVOLTAIC, AND BATTERY STORAGE SYSTEM REQUIREMENT DETERMINATIONS

Compliance software, alternative component packages, exceptional methods, data registries and related data input software, alternative residential field verification protocols or electronic document repositories must be approved by the Commission in order to be used to demonstrate compliance with Part 6.
Application. Applications for approval of compliance software, alternative component packages, exceptional methods, data registries and related data input software, and alternative field verification protocols must be made as follows:
An applicant shall submit four copies of a signed application form specified by the Executive Director.
The application shall include the following materials:
A description of the functional or analytical capabilities of the compliance software, alternative component package, calculation method, exceptional method, data registry or related data input software, and alternative field verification protocol; and
A demonstration that the criteria in Section 10-109 are met; and
An initial fee of one thousand dollars ($1,000). The total fee shall cover the Commission's cost of reviewing and analyzing the application. Within 75 days of receipt of an application, the Commission will provide an estimate of the total maximum cost to review and analyze the application and make a determination as to the completeness of the application. Consideration of the application will be delayed until the applicant submits requested additional information. After the Commission determines the total cost, if the cost exceeds the initial fee, the Commission shall assess an additional fee to cover the total cost. If the actual cost is less than the initial, or any estimated maximum, fee the Commission shall refund the difference to the applicant.
Compliance Software.
Public Domain Computer Programs. In addition to the public domain computer programs that are approved pursuant to Public Resources Code Section 25402.1, the Commission may, upon written application or its own motion, approve additional public domain computer programs that may be used to demonstrate that proposed building designs meet energy budgets.
The Commission shall ensure that users' manuals or guides for each approved program are available.
The Commission shall approve a program only if it predicts energy consumption substantially equivalent to that predicted by the above-referenced public domain computer program, when it models building designs or features.

10-109 – COMPLIANCE SOFTWARE, ALTERNATIVE COMPONENT PACKAGES, EXCEPTIONAL METHODS, DATA REGISTRIES AND RELATED EXTERNAL DIGITAL DATA SOURCES, ALTERNATIVE RESIDENTIAL FIELD VERIFICATION PROTOCOLS, ELECTRONIC DOCUMENT REPOSITORIES, PHOTOVOLTAIC, AND BATTERY STORAGE SYSTEM

Alternative Calculation Methods (All Occupancies). The Commission may approve non-public domain computer programs as an alternative calculation method that building permit applicants may then use to demonstrate compliance with the performance standards (energy budgets) in Part 6. In addition to the application requirements of subdivision (b) above, an application for approval of compliance software must include documentation demonstrating that the compliance software meets the requirements, specifications, and criteria set forth in the Residential or Nonresidential ACM Approval Manual, as appropriate.
NOTE: Copies of the ACM Approval Manuals may be obtained from the Commission's website at: www.energy.ca.gov/title24.
Alternative Component Packages. In addition to the application requirements of subdivision (b) above, an application for approval of an alternative component package must include documentation that demonstrates that the package:
Will meet the applicable energy budgets; and
Is likely to apply to a significant percentage of newly constructed buildings or to a significant segment of the building construction and design community.
Exceptional Methods. The Commission may approve an exceptional method that analyzes a design, material, or device that cannot be adequately modeled using the public domain computer programs. Applications for approval of exceptional methods shall include all information needed to verify the method's accuracy.
Commission Action. The Commission may take the following actions on an application submitted pursuant to this section:
Approve the application unconditionally;
Restrict approval to specified occupancies, designs, materials, or devices; or
Reject the application.
Resubmittal. An applicant may resubmit a rejected application or may request modification of a restricted approval. Such application shall include the information required pursuant to this section, and, if applicable, shall indicate how the proposed compliance software, alternative component package, exceptional method, data registry or related data input software has been changed to enhance its accuracy or capabilities.
Modification. Whenever an approved compliance software, alternative component package, exceptional method, data registry or related data input software is changed in any way, it must be resubmitted under this section for approval.
The Commission may modify or withdraw approval of compliance software, an alternative component package, an exceptional method, or a data registry or related data input software based on its approval of other programs, methods, registries or data input software that are more suitable.
In addition to the procedures and protocols identified in the Alternative Calculation Method Approval Manuals and the Reference Appendices, the Commission may authorize alternative procedures or protocols that demonstrate compliance with Part 6.
Data Registries And Related External Digital Data Sources, And Electronic Document Repositories.
Data Registries and Related External Digital Data Sources.
Data registries and related external digital data sources shall conform to the requirements specified in Reference Joint Appendix JA7.
The Commission may approve residential data registries that provide for compliance document and their associated Compliance Registration Packages registration and retention, when required by Part 6 of all residential compliance documentation and the nonresidential Certificates of Verification.

10-109 – COMPLIANCE SOFTWARE, ALTERNATIVE COMPONENT PACKAGES, EXCEPTIONAL METHODS, DATA REGISTRIES AND RELATED EXTERNAL DIGITAL DATA SOURCES, ALTERNATIVE RESIDENTIAL FIELD VERIFICATION PROTOCOLS, ELECTRONIC DOCUMENT REPOSITORIES, PHOTOVOLTAIC, AND BATTERY STORAGE SYSTEM

Nonresidential Data Registry Approval Thresholds.
The Commission may approve nonresidential data registries that provide for compliance document and their associated Compliance Registration Packages registration, when required by Part 6 of all nonresidential compliance documentation, excluding all Certificates of Acceptance recorded by an acceptance test technician certification provider (10-103.1 and 10-103.2). However, nonresidential data registries may not provide for registration of nonresidential Certificates of Verification.
As a prerequisite to reviewing and/or approving nonresidential data registries for use, on or after January 1, 2023, the Commission shall first make all of the following findings:
The Commission has approved data schema capable of utilization in the development of any nonresidential data registry.
The Commission will not lose access to information necessary to support the enforcement and development of current and future building code cycles.
The procedures for consideration and approval of applications enumerated in 10-110 shall not apply to applications for nonresidential data registries until the Commission makes the findings specified in 10-109(i)1Bii.
Nothing in this or any other section, including 10-110, shall be construed as requiring the Commission to make the findings specified in 10-109(i)1Biia by any set date, regardless of pending applications.
The Registration Provider shall only use data schema approved by the Commission in a nonresidential data registry.
The Commission may approve external digital data sources used for data input to various data registries for registering, when required by Part 6 residential or nonresidential compliance documentation.
Electronic Document Repositories.
The Commission may approve electronic document repositories that retain for the Commission electronic compliance documentation and their associated Compliance Registration Packages generated by residential and nonresidential data registries when registration is required by Part 6.
Alternative Residential Field Verification Protocols.
Alternative residential field verification protocols shall comply with the application requirements of Section 10- 109(b) and any applicable requirements of Reference Residential Appendices RA1.
Photovoltaic System and Battery Storage System Requirement Determinations.
The Commission may, upon written application or its own motion, determine that the photovoltaic or battery storage requirements in Section 150.1(a)3, Section 140.0(c), Section 170.0(a)3 shall not apply, if the Commission finds that the implementation of public agency rules regarding utility system costs and revenue requirements, compensation for customer-owned generation, interconnection fees, or other factors, causes the Commission’s cost effectiveness conclusions, made pursuant to Public Resources Code 25402(b)(3), to not hold for particular buildings.
Applications shall include full information regarding the differences between public agency rules and Energy Commission cost effectiveness determinations, including all information requested by the Commission to enable full review of the application. Applications shall also include specific recommended limitations to the scope of the determination that is requested, and specific eligibility criteria to determine what buildings would qualify for the determination. Applications from public agencies shall be submitted to the Energy Commission only after public review within the jurisdiction of the public entity or service area of the utility.
NOTE: Authority: Sections 25402 and 25402.1, Public Resources Code. Reference: Sections 25007, 25008, 25218.5,
25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8,25605, 25910, and 25943, Public Resources Code.

– COMPLIANCE SOFTWARE, ALTERNATIVE COMPONENT PACKAGES, EXCEPTIONAL METHODS, DATA REGISTRIES AND RELATED EXTERNAL DIGITAL DATA SOURCES, ALTERNATIVE RESIDENTIAL FIELD VERIFICATION PROTOCOLS, ELECTRONIC DOCUMENT REPOSITORIES, PHOTOVOLTAIC, AND BATTERY STORAGE SYSTEM

10-110 – PROCEDURES FOR CONSIDERATION OF APPLICATIONS UNDER SECTIONS 10-104, 10-106, 10-108, AND 10-109
Within 75 days of receipt of an application, the Executive Director shall determine if the application is complete with all the supporting information required pursuant to Sections 10-104, 10-106, 10-108, or 10-109 (the complete application package).
Once the application is determined to be complete, the Executive Director shall make the complete application package available to interested parties for review and comment. Comments from interested parties must be submitted within a time period set by the Executive Director, which shall be no less than 15 and no greater than 60 days after the complete application package is made available.
Within 75 days of the date the application is determined to be complete, the Executive Director may request any additional information needed to evaluate the application. Consideration of the application will be delayed until the applicant submits the requested additional information.
Within 75 days of the date the application is determined to be complete, the Executive Director may convene a workshop to gather additional information from the applicant and other interested parties. Interested parties will have 15 days after the workshop to submit additional comments or information regarding the application.
Within 90 days of the date the application is determined to be complete, or within 30 days after receipt of complete additional information requested under Section 10-110(c), or within 60 days after the receipt of additional information submitted by interested parties under Section 10-110(d), whichever is later, the Executive Director shall submit to the Commission a written recommendation on the application.
The complete application package, any additional information considered by the Executive Director, and the Executive Director's recommendation shall be placed on the consent calendar and considered at the next business meeting after submission of the recommendation. The matter may be removed from the consent calendar at the request of any person.
The Executive Director may charge a fee to recover the costs of processing and reviewing applications, with the exception of Section 10-106 applications.
All applicants have the burden of proof to establish that their applications should be granted.
NOTE: Authority: Section 25402.1, Public Resources Code. Reference: Section 25402.1, Public Resources Code.

– PROCEDURES FOR CONSIDERATION OF APPLICATIONS UNDER SECTIONS 10-104, 10-106, 10-108, AND 10-

– CERTIFICATION AND LABELING OF FENESTRATION PRODUCT AND EXTERIOR DOOR U-FACTORS, SOLAR HEAT GAIN COEFFICIENTS, VISIBLE TRANSMITTANCE AND AIR LEAKAGE
This section establishes rules for implementing labeling and certification requirements relating to U-factors, solar heat gain coefficients (SHGCs), visible transmittance (VT) and air leakage for fenestration products and exterior doors under Section 110.6(a) of Part 6. This section also provides for designation of the National Fenestration Rating Council (NFRC) as the supervisory entity responsible for administering the state's certification program for fenestration products and exterior doors, provided NFRC meets specified criteria.
Labeling Requirements.
Temporary labels.
Every manufactured fenestration product and exterior door shall have attached to it a clearly visible temporary label that lists the U-factor, the solar heat gain coefficient (SHGC) and Visible Transmittance (VT) and that certifies compliance with the air leakage requirements of Section 110.6(a)1. Temporary labels for manufactured fenestration products and exterior doors are to incorporate the values determined by Section 10-111(a)1B and shall comply with the labeling requirements of NFRC 700. No other values for U-factor, SHGC, VT and Air Leakage are allowed on the temporary label attached to the manufactured fenestration product or exterior door. Component Modeling Approach (CMA) and site-built fenestration products shall have an NFRC label certificate that lists the U-factor, the Solar Heat Gain Coefficient (SHGC), and the Visible Transmittance (VT) and shall comply with the labeling requirements of NFRC 705 for the Computer Modeling Approach or NFRC 700 for site-built fenestration products.
U-factor, SHGC, VT and Air Leakage shall be determined by either:
Fenestration products and exterior doors rated and certified using NFRC 100, NFRC 200, NFRC 202 NFRC 203 or NFRC 400 Rating Procedures. The manufacturer shall stipulate that the ratings were determined in accordance with applicable NFRC procedures. For manufactured fenestration products and exterior doors, a temporary label certificate approved by the supervisory entity (NFRC) meets the requirements of this section. For component modeling and site-built fenestration products, a label certificate approved by the supervisory entity (NFRC) meets the requirements of this section.
For manufactured or site-built fenestration products and exterior doors not rated by NFRC, a temporary label with the words “CEC Default U-factor,” followed by the appropriate default U- factor specified in Section 110.6(a)2 and with the words “CEC Default SHGC,” followed by the appropriate default SHGC specified in Section 110.6(a)3 and with the words "CEC Default VT," followed by the appropriate VT as specified in Section 110.6(a)4, meets the requirements of this Subsection B.
Temporary labels shall also certify that the manufactured fenestration product or exterior door complies with the air leakage requirements of Section 110.6(a)1 of the Standards.
Permanent labels. Rated products shall have a permanent label consistent with their rating and certification that is either a stand-alone label, an extension or tab of an existing permanent certification label being used by the manufacturer/responsible party, or a series of marks or etchings on the product. The permanent label coupled with observable product characteristics, shall be usable to trace the product to certification information on file with the supervisory entity or to a directory of certified products, published by the supervisory entity. For CMA and site-built fenestration products, a label certificate approved by the supervisory entity meets the requirements of this section.
EXCEPTION to Section 10-111(a): Field-fabricated fenestration products.

Certification Requirements.
Certification to default ratings. The manufacturer shall certify on the Default Label that the product's U- factor, SHGC and VT meets the default criteria in Sections 110.6(a)2, 110.6(a)3 and 110.6(a)4; and
A temporary label, affixed to the product, that meets the requirements of Section 10-111(a)1B meets this requirement.
If the product claims the default U-factor for a thermal break product, the manufacturer shall also certify on the label that the product meets the thermal break product criteria, specified on the default table, on which the default value is based. Placing the terms “Meets Thermal Break Default Criteria” on the default temporary label or default label certificate meets this requirement.
Certification to NFRC rating procedure. If a product's U-factor, SHGC or VT is based on the NFRC Rating Procedure, the U-factor, SHGC or VT shall be certified by the manufacturer according to the procedures of an independent certifying organization approved by the Commission.
A temporary label, affixed to the product or label certificate for CMA and site-built fenestration, meeting the requirements of Section 10-111(a) certified by the independent certifying organization complies with this requirement.
An “independent certifying organization approved by the Commission” means any organization authorized by the supervisory entity to certify U-factor ratings, Solar Heat Gain Coefficient and Visible Transmittance ratings in accordance with the NFRC Rating Procedure. If the Commission designates the NFRC as the supervisory entity, any independent certification and inspection agency (IA) licensed by NFRC shall be deemed to be an “independent certifying organization approved by the Commission.”
The “supervisory entity” means the NFRC, except as provided in Section 10-111(c)1.
EXCEPTION to Section 10-111(b): Field-fabricated fenestration products.
Designation of Supervisory Entity. The NFRC shall be the supervisory entity to administer the certification program relating to U-factors, SHGC, and VT ratings for fenestration products and exterior doors, provided the Commission determines that the NFRC meets the criteria in Section 10-111(d).
The Commission may consider designating a supervisory entity other than NFRC only if the Commission determines that the NFRC cannot meet the criteria in Section 10-111(d). Such other supervisory entity shall meet the criteria in Section 10-111(d) prior to being designated.
The Commission shall periodically review, at least annually, the structure and operations of the supervisory entity to ensure continuing compliance with the criteria in Section 10-111(d).
Criteria for Supervisory Entity.
Membership in the entity shall be open on a nondiscriminatory basis to any person or organization that has an interest in uniform thermal performance ratings for fenestration products and exterior doors, including, but not limited to, members of the fenestration industry, glazing infill industry, building industry, design professionals, specifiers, utilities, government agencies, and public interest organizations. The membership shall be composed of a broad cross section of those interested in uniform thermal performance ratings for fenestration products.
The governing body of the entity shall reflect a reasonable cross section of the interests represented by the membership.
The entity shall maintain a program of oversight of product manufacturers, laboratories, and independent certifying organizations that ensures uniform application of the NFRC Rating Procedures, labeling and certification, and such other rating procedures for other factors affecting energy performance as the NFRC and the Commission may adopt.

The entity shall require manufacturers and independent certifying organizations within its program to use laboratories accredited by the supervisory entity to perform simulations and tests under the NFRC Rating Procedure or by an NFRC Approved Calculation Entity (ACE) under the Component Modeling Approach (CMA) Product Certification Program (PCP).
The entity shall maintain appropriate guidelines for testing and simulation laboratories, manufacturers, and certifying agencies, including requirements for adequate:
Possession and calibration of equipment;
Education, competence, and training of personnel;
Quality control;
Record keeping and reporting;
Periodic review (including, but not limited to, blind testing by laboratories; inspections of products; and inspections of laboratories, manufacturing facilities, and certifying agencies);
Challenges to certified ratings; and
Guidelines to maintain the integrity of the program, including, but not limited to, provisions to avoid conflicts of interest within the rating and certification process.
The entity shall be a nonprofit organization and shall maintain reasonable, nondiscriminatory fee schedules for the services it provides and shall make its fee schedules, the financial information on which fees are based, and financial statements available to its members for inspection.
The entity shall provide hearing processes that give laboratories, manufacturers, and certifying agencies a fair review of decisions that adversely affect them.
The entity shall maintain a certification policy committee whose procedures are designed to avoid conflicts of interest in deciding appeals, resolving disputes, and setting policy for the certifying organizations within its program.
The entity shall publish at least annually a directory of products certified and decertified within its program.
The entity itself shall be free from conflict-of-interest ties or to undue influence from any particular manufacturing interest(s), testing or simulation lab(s), or independent certifying organization(s).
The entity shall provide or authorize the use of labels and label certificates for Component Modeling Approach and site-built fenestration products that can be used to meet the requirements of Sections 110.6(a)2, 110.6(a)3 and 110.6(a)4, and this section.
The entity's certification program shall allow for multiple participants in each aspect of the program to provide for competition between manufacturers, testing labs, simulation labs, and independent certifying organizations.
Certification for Other Factors. Nothing in this section shall preclude any entity, whether associated with a U- factor, SHGC or VT certification program or not, from providing certification services relating to factors other than U-factors, SHGCs and VTs for fenestration products and exterior doors.
NOTE: Authority: Section 25402 and 25402.1, Public Resources Code. Reference: Sections 25007, 25008, 25218.5,
25310, 25402, 25402.1, 25402.4, 25402.8, and 25943, Public Resources Code.

– CRITERIA FOR DEFAULT TABLES
The Commission shall maintain tables of default U-factors and SHGCs for use as an alternative to U-factors and SHGCs derived based on the NFRC Rating Procedure. The default values shall meet the following criteria:
The values shall be derived from simulations of products using the same computer simulation program(s) used in the NFRC Rating Procedure.
The default values shall be set so that they do not provide to any significant number of products a lower U-factor or SHGC than those products would obtain if they were rated using the full NFRC Rating Procedure.
The Commission shall periodically review and revise the default tables as necessary to ensure that the criteria are met.
NOTE: Authority: Sections 25402 and 25402.1, Public Resources Code. Reference: Sections 25007, 25008, 25218.5,
25310, 25402, 25402.1, 25402.4, 25402.8, 25910 and 25943, Public Resources Code.

– RATING AND LABELING OF ROOFING PRODUCT REFLECTANCE AND EMITTANCE
This section establishes rules for implementing labeling and rating requirements relating to reflectance and emittance for roofing products for showing compliance with Sections 140.1, 140.2, 140.3(a)1, 141.0(b)2B, 150.1(c)11, 150.2(b)1H, and 150.2(b)2 of Title 24, California Code of Regulations, Part 6. This section also provides for designation of the Cool Roof Rating Council (CRRC) as the supervisory entity responsible for administering the state's rating program for roofing products, provided CRRC meets specified criteria.
Labeling Requirements.
Every roofing product installed in construction to take compliance credit or meet the prescriptive requirements for reflectance and emittance under Sections 140.1, 140.2, 140.3(a)1, 141.0(b)2B, 150.1(c)11, 150.2(b)1I or 150.2(b)2 shall have a clearly visible packaging label that lists the emittance and the initial and aged solar reflectance, or a CRRC Rapid Rating for solar reflectance, tested in accordance with CRRC-1.
Packaging for liquid-applied roof coatings shall state the product meets the requirements specified in Section 110.8(i)4.
Certification Requirements.
Every roofing product installed in construction to take compliance credit or meet the prescriptive requirements for reflectance and emittance under Sections 140.1, 140.2, 140.3(a)1, 141.0(b)2B, 150.1(c)11, 150.2(b)1I or 150.2(b)2 shall be rated by CRRC or another supervisory entity approved by the Commission pursuant to Section 10-113(c).
Designation of Supervisory Entity. The CRRC shall be the supervisory entity to administer the rating program relating to reflectance and emittance ratings for roofing products, provided the Commission determines that the CRRC meets the criteria in Section 10-113(d).
The Commission may consider designating a supervisory entity other than CRRC if the Commission determines that the CRRC is not meeting the criteria in Section 10-113(d). Such other supervisory entity shall meet the criteria in Section 10-113(d) prior to being designated.
The Commission shall periodically review, at least annually, the structure and operations of the supervisory entity to ensure continuing compliance with the criteria in Section 10-113(d). The supervisory entity shall provide an annual report to the Commission explaining all of the measures it has taken to comply with the criteria in Section 10-113(d).
Criteria for Supervisory Entity.
Membership in the entity shall be open on a nondiscriminatory basis to any person or organization that has an interest in uniform performance ratings for roofing products, including, but not limited to, members of the roofing industry, building industry, design professionals, specifiers, utilities, government agencies, and public interest organizations. The membership shall be composed of a broad cross section of those interested in uniform thermal performance ratings for roofing products.
The governing body of the entity shall reflect a reasonable cross-section of the interests represented by the membership.
The entity shall maintain a program of oversight of product manufacturers, laboratories, and independent certifying organizations that ensures uniform application of the CRRC testing and rating procedures, labeling and rating, and such other rating procedures for other factors that improves the accuracy of properties of roofing products affecting energy performance as the CRRC and the Commission may adopt.
The entity shall require manufacturers and independent certifying organizations within its program to use only laboratories accredited by the supervisory entity to perform tests in accordance with CRRC-1.

The entity shall maintain appropriate guidelines for testing laboratories and manufacturers, including requirements for adequate:
Possession and calibration of equipment;
Education, competence, and training of personnel;
Quality control;
Record keeping and reporting;
Periodic review including but not limited to, blind testing by laboratories; inspections of products; and inspections of laboratories and manufacturing facilities;
Challenges to ratings; and
Guidelines to maintain the integrity of the program, including, but not limited to, provisions to avoid conflicts of interest within the rating process.
The entity shall be a nonprofit organization and shall maintain reasonable, nondiscriminatory fee schedules for the services it provides, and shall make its fee schedules, the financial information on which fees are based, and financial statements available to its members for inspection.
The entity shall provide hearing processes that give laboratories, manufacturers and certifying agencies a fair review of decisions that adversely affect them.
The entity shall maintain a policy committee or similar body whose procedures are designed to avoid conflicts of interest in deciding appeals, resolving disputes and setting policy for the certifying organizations in its program.
The entity shall publish at least annually a directory of rated products and products that are no longer rated by the CRRC.
The entity itself shall be free from conflict-of-interest ties or to undue influence from any particular roofing product manufacturing interest(s), testing or independent certifying organization(s).
The entity shall provide or authorize the use of labels that can be used to meet the requirements for showing compliance with the requirements of Sections 140.1, 140.2, 140.3(a)1, 141.0(b)2B, 150.1(c)11, 150.2(b)1I and 150.2(b)2, and this section.
The entity's rating program shall allow for multiple participants in each aspect of the program to provide for competition between manufacturers and between testing labs.
NOTE: Authority: Sections 25402 and 25402.1, Public Resources Code. Reference: Sections 25007, 25008, 25218.5,
25310, 25402, 25402.1, 25402.4, 25402.8, 25910 and 25943, Public Resources Code.

– DETERMINATION OF OUTDOOR LIGHTING ZONES AND ADMINISTRATIVE RULES FOR USE
This section establishes rules for implementing outdoor lighting zones to show compliance with Section 140.7 of Title 24, California Code of Regulations, Part 6.
Lighting Zones. Exterior lighting allowances in California vary by Lighting Zones (LZ).
Lighting Zone Characteristics. TABLE 10-114-A specifies the relative ambient illumination level and the statewide default location for each lighting zone.
Amending the Lighting Zone Designation. A local jurisdiction may officially adopt changes to the lighting zone designation of an area by following a public process that allows for formal public notification, review, and comment about the proposed change. The local jurisdiction may determine areas where Lighting Zone 4 is applicable and may increase or decrease the lighting zones for areas that are in State Default Lighting Zones 1, 2 and 3, as specified in TABLE 10-114-A.
TABLE 10-114-A LIGHTING ZONE CHARACTERISTICS AND RULES FOR AMENDMENTS BY LOCAL JURISDICTIONS
Zone	Ambient Illumination	State wide Default Location	Moving Up to Higher Zones	Moving Down to Lower Zones	
LZ0	Very Low	Undeveloped areas of government designated parks, recreation areas, and wildlife preserves.	Undeveloped areas of government designated parks, recreation areas, and wildlife preserves can be designated as LZ1 or LZ2 if they are contained within such a zone.	Not applicable	
LZ1	Low	Rural areas, as defined by the 2010 U.S. Census. These areas include: single or dual family residential areas, parks, and agricultural zone districts, developed portion of government designated parks, recreation areas, and wildlife preserves. Those that are wholly contained within a higher lighting zone may be considered by the local government as part of that lighting zone.	Developed portion of a government designated park, recreation area, or wildlife preserve, can be designated as LZ2 or LZ3 if they are contained within such a zone.
Retail stores, located in a residential neighborhood, and rural town centers, as defined by the 2010 U.S. Census, can be designated as LZ2 if the business operates during hours of darkness.	Not applicable.	
LZ2	Moderate	Urban clusters, as defined by the 2010 U.S. Census.
The following building types may occur here: multifamily housing, mixed use residential neighborhoods, religious facilities, schools, and light commercial business districts or industrial zoning districts.	Special districts within a default LZ2 zone may be designated as LZ3 or LZ4 by a local jurisdiction.
Examples include special commercial districts or areas with special security considerations located within a mixed-use residential area or city center.	Special districts may be designated as LZ1 by the local jurisdiction, without any size limits.	
LZ3	Moderately High	Urban areas, as defined by the 2010 U.S. Census.
The following building types may occur here: high intensity commercial corridors, entertainment centers, and heavy industrial or manufacturing zone districts.	Special districts within a default LZ3 may be designated as a LZ4 by local jurisdiction for high intensity nighttime use, such as entertainment or commercial districts or areas with special security considerations requiring very high light levels.	Special districts may be designated as LZ1 or LZ2 by the local jurisdiction, without any size limits.	
LZ4	High	None.	Not applicable.	Not applicable.	
NOTE: Authority: Sections 25402 and 25402.1, Public Resources Code. Reference: Sections 25007, 25008, 25218.5,
25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and 25943, Public Resources Code.

– COMMUNITY SHARED SOLAR ELECTRIC GENERATION SYSTEM OR COMMUNITY SHARED BATTERY STORAGE SYSTEM COMPLIANCE OPTION FOR ON-SITE SOLAR ELECTRIC GENERATION OR BATTERY STORAGE REQUIREMENTS
Community Shared Solar Electric Generation System or Battery Storage System Offset. If approved by the commission, a community shared solar system, other community shared renewable system, community shared battery storage system, or combination of the aforementioned systems (hereinafter referred to as a community shared solar or battery storage system) may be used as a compliance option to partially or totally meet the on-site solar electric generation system and/or battery storage system that is otherwise required by Section 140.0(c), 150.1(a)3, or 170.0(a)3 of Title 24, California Code of Regulations, Part 6. To be approved, the community shared solar electric generation or community shared battery storage system must demonstrate, to the Commission’s satisfaction, that all the following requirements will be met:
Enforcement Agency. The community shared solar electric generation system and/or community shared battery storage system shall be installed and available for enforcement agency site inspection, no later than the point in time the enforcement agency must physically verify compliance of the building, which would otherwise be required to have an on-site solar electric generation and/or battery storage system, and shall not cause delay in the process of enforcement agency review and approval of that building. The enforcement agency shall have jurisdiction and facilitated access to make site inspections. All documentation for the community solar electric generation system and/or community solar battery storage system that is required to demonstrate compliance for the building shall be completed prior to building permit application.
Energy Performance. The community shared solar electric generation system and/or community shared battery storage system shall be demonstrated to provide the same or better energy performance equal to the partial or total compliance with the energy performance of the on-site solar electric generation and/or battery storage system that would otherwise have been required for the building, computed by compliance software certified for use by the Commission.
Participating Building Energy Savings Benefits. The community shared solar electric generation system and/or community shared battery storage system shall provide energy saving benefits directly to the building. The energy savings benefits allocated to the building shall be in the form of:
actual reductions in the energy consumption of the participating building;
energy reduction credits that will result in virtual reductions in the building’s energy consumption that is subject to energy bill payments; or
payments to the building that will have an equivalent effect as energy bill reductions.
The reduction in the building’s energy bill resulting from A, B, or C above shall be greater than the added cost to the building resulting from the building’s share in the community shared solar and/or battery storage system.
Durability, Participation, and Building Opt-out.
Durability. The community shared solar electric generation system and/or community shared battery storage system shall be designed and installed to provide the energy savings benefits to the participating building(s) specified in Section 10-115(a)3 for a period of no less than 20 years.
Participation. The Administrator(s) approved by the Energy Commission pursuant to Section 10- 115(b)1 shall ensure that all participating buildings, which use the community shared solar and/or community shared battery storage system to comply with Section 140.0(c), 150.1(a)3, or 170.0(a)3, remain participating buildings for no less than a 20-year period (“Participation Period”), regardless of who owns or occupies the participating building, unless the building owner discontinues participation after causing the on-site solar electric generation system to be installed and interconnected pursuant

10-115 – COMMUNITY SHARED SOLAR ELECTRIC GENERATION SYSTEM OR COMMUNITY SHARED BATTERY STORAGE SYSTEM COMPLIANCE OPTION FOR ON-SITE SOLAR ELECTRIC GENERATION OR BATTERY STORAGE

to the Opt-Out Requirements. For purposes of this Section, "Opt-Out Requirements" shall mean installation and interconnection of an on-site solar electric generation system that meets or exceeds. the requirements of Section 140.0(c), 150.1(a)3, or 170.0(a)3 in effect at the time the builder applied for the original building permit for the participating building. To demonstrate compliance, the Administrator shall require either:
Equitable Servitude. As a condition for a building to participate, participating builders shall impose an equitable servitude through a properly recorded declaration of covenants, conditions and restrictions (“CC&Rs”) or other properly recorded covenant, deed restriction or other legally binding method referenced in each deed transferring title for each participating building. This equitable servitude shall run with the land and obligate the original owner(s)/tenant(s) and all subsequent owner(s)/tenant(s) of the participating building to maintain the building’s participation in the community shared solar and/or community shared battery storage system for the Participation Period, or ensure installation and interconnection of an on-site solar electric generation system that satisfies the Opt-Out Requirements. The equitable servitude shall specify that in order to discontinue participation in the community shared solar and/or battery system, the building owner must satisfy the Opt-Out Requirements. The builder shall ensure that the equitable servitude provides the Administrator approved by the Commission the right to enforce the above provisions. The equitable servitude shall remain in force for a period of 20 years from the date of first participation of the building in the community shared solar and/or battery system. The equitable servitude shall not be revocable. The equitable servitude shall be delivered to all responsible parties through transfer disclosure statements.
Other system. The Commission may approve another program, structure, or system by which an Administrator (or other entity approved by the Commission) ensures the requirements of this Section 10-115(a)4B will be satisfied for a Participation Period of no less than 20 years.
Compliance Documentation. The Administrator shall maintain record(s) of the compliance documentation that determined the requirements for the on-site solar electric generation system and/or battery storage system to comply with the standards in effect at the time the builder applied for the original building permit, and which establishes participants’ obligations to meet the Opt-Out Requirements. The Administrator shall provide a copy of this compliance documentation upon a participating building owner’s request, to every new owner of a participating building when the Administrator is notified that title has transferred, and to any participating building owner who requests to Opt-Out.
Building Opt-Out. At any time during the Participation Period, a participating building owner shall have the option to discontinue the participation of the building in the community shared solar and/or battery storage system (“Opt-Out”) if the building satisfies the Opt-Out Requirement.
Prior to Opt-Out, the building owner shall demonstrate that they have installed such an on-site solar electric generation system and met the Opt-Out Requirements by providing documentation from the installer of the on-site solar system or an attestation of the building owner with supporting documentation. The building owner shall be responsible for all costs associated with documenting that the on-site solar generation system satisfies the Opt-Out Requirements.
Upon receiving documentation regarding Opt-Out from a building owner, the Administrator shall compare the documentation to the compliance documentation specified in Section 10-115(a)4C and confirm whether, based on the documentation, the installed solar system meets or exceeds the Opt- Out Requirements. Within 30 days of a building owner providing documentation, the Administrator shall provide written confirmation to the building owner whether, based on the Administrator’s review of that documentation, the on-site solar generation system satisfies the Opt-Out Requirements. The Administrator may, at its discretion, verify the documentation through a physical inspection. The Administrator shall maintain record of the documentation that demonstrates and confirms the on-site solar generation system met the Opt-Out requirements for the remainder of the Participation Period.

10-115 – COMMUNITY SHARED SOLAR ELECTRIC GENERATION SYSTEM OR COMMUNITY SHARED BATTERY STORAGE SYSTEM COMPLIANCE OPTION FOR ON-SITE SOLAR ELECTRIC GENERATION OR BATTERY STORAGE

Upon a building owner’s exercise of the Opt-Out, all costs and benefits associated with participation in the community shared solar and/or battery storage system shall cease. If any balance of costs or benefits is owed to either party at the time of Opt-Out, such balance shall be paid to that party.
The Administrator (or other entity approved by the Commission pursuant to Section 10-115(a)4Bii) shall not impose any penalty related to a participating building’s Opt-Out, or charge participants for recuperation of unrealized revenue that would have been expected to accrue beyond the end of participation. If the Administrator (or other entity approved by the Commission) plans to charge any other fees at the time of building Opt-Out, the Application for Commission Approval shall explain the purpose of those fees.
	Additionality. The community shared solar electric generation system and/or community shared battery storage system shall provide the energy savings benefits specified in Section 10-115(a)3 exclusively to the participating building(s). Those energy savings benefits shall in no way be attributed to other purposes or transferred to other buildings or property.
The participating building(s) shall be served primarily by renewable resources developed specifically for the community solar electric generation system.
Other renewable resources may be used when participating buildings are permitted before the renewable resources developed for the program start operating or after they cease operating. During these times, other renewable resources may be used to meet the requirements of Section 10-115(a)4 for each participating building.
The renewable resources, including those developed primarily to serve participating buildings and those utilized to serve participating buildings during the time periods described in Section 10-115(a)5B for the purpose of meeting the requirements of Section 10-115(a)4, shall meet the following requirement:
For each renewable resource used to serve participating buildings, bundled Renewable Energy Credits (RECs), which satisfy the criteria of Portfolio Content Category 1, shall be retired and tracked in the Western Renewable Energy Generation Information System (WREGIS) on the behalf of program participants, to ensure that they will not be allocated to or used for any other purpose, including Renewable Performance Standard (RPS) compliance, resale of RECs or renewable generation to any other person or entity, or any other mandatory or voluntary renewable electricity program requirement or claim.
Renewable resources developed to serve participating buildings may also be used to serve other loads when there is excess generation beyond what is needed to serve participating buildings. Any excess generation used for such other loads shall be isolated from the generation serving participating buildings and shall not result in violation of Section 10-115(a)5C.
Location. The community shared solar electric generation system and/or community shared battery storage system shall be located on a distribution system of the load serving entity providing service to the participating buildings.
Size. The community shared solar electric generation system and/or community shared battery storage system shall not be served by any individual source larger than 20 MW.
Accountability and Recordkeeping. Applicants for Commission approval of community shared solar electric generation systems and/or community shared battery storage systems shall be accountable to all parties who relied on these systems for partial or total compliance with the on-site solar electric generation and/or battery storage system that would otherwise be required, including but not limited to builders of the buildings, owners of the buildings, enforcement agencies, and the Commission.
Each year beginning twelve months after initial approval, the Administrator shall provide to the Commission a report demonstrating the previous year’s compliance with each requirement of Section 10-115.

10-115 – COMMUNITY SHARED SOLAR ELECTRIC GENERATION SYSTEM OR COMMUNITY SHARED BATTERY STORAGE SYSTEM COMPLIANCE OPTION FOR ON-SITE SOLAR ELECTRIC GENERATION OR BATTERY STORAGE

Recordkeeping regarding compliance with the requirements in Sections 10-115(a) shall be maintained over the period of time specified in Section 10-115(a)4 for each building for which the community shared solar electric generation or battery storage system is used to demonstrate partial or total compliance. Access to these records shall be provided to any entity approved by the Commission for auditing compliance with these requirements.
Application for Commission Approval. Any entity may apply to the Commission for approval to administer a community shared solar electric generation or community shared battery storage system to provide partial or total compliance with the on-site solar electric generation system and/or battery storage system required by Section 150.1 of Title 24, California Code of Regulations, Part 6. Once approved, the entity shall be the Administrator of the community shared solar electric generation or community shared battery storage system.
The application shall demonstrate to the Commission’s satisfaction that each of the requirements specified in Section 10-115(a) will be met and shall include detailed explanation of the actions that will be taken by the applicant to ensure that each requirement is met over the period of time specified in Section 10-115(a)4 for each building for which a partial or total offset is used to demonstrate compliance.
All applicants have the burden of proof to establish that their application should be granted.
Applications from public agencies shall be submitted to the Energy Commission only after public review through at least one public meeting within the jurisdiction of the public entity or service area of the load- serving entity and adoption by the public agency. The Commission shall have the authority to not approve any application that the Commission determines to be inconsistent with the requirements of
Section 10-115.
Executive Director Approval of Revised Applications. The Administrator of an approved community shared solar electric generation system and/or community shared battery storage system shall submit a revised application demonstrating compliance with the Section 10-115 requirements to the Executive Director for approval, when:
A new renewable resource is proposed to be added to a community shared solar electric generation system and/or community shared battery storage system, and/or
The Commission modifies the requirements of Section 10-115 in a building standards rulemaking. Such modified requirements would not apply retroactively to the buildings for which building permit applications are submitted prior to the effective date of the modified standards or to the continued use of previously approved renewable resources developed to serve a community shared solar electric generation system and/or community shared battery storage system.
Within 60 days of receiving a revised application, the Executive Director may either: approve the revised application by letter if the Executive Director concludes that the requirements of Section 10-115 will be met, request the Administrator to resubmit their revised application with changes, or disapprove the application. If the Executive Director disapproves the application, the applicant may request that the Commission review the Executive Director’s determination. The petition must be filed in writing in accordance with Title 20, California Code of Regulations, Section 1208 within 15 days of the date of the filing of the Executive Director's determination and must state the basis for requesting review of the Executive Director's determination. Within 45 days of receiving a request for review, the Commission shall issue a written decision affirming or modifying the Executive Director's determination. If the Commission does not issue a written decision within 45 days, the request for review shall be deemed denied. The Administrator shall have the burden of proof to establish that its revised application should be approved.

NOTE: Authority: Sections 25213, 25218, 25218.5, 25402, 25402.1, and 25605, Public Resources Code. Reference:
Sections 25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.8, 25605, and 25943, Public Resources
Code.

10-115 – COMMUNITY SHARED SOLAR ELECTRIC GENERATION SYSTEM OR COMMUNITY SHARED BATTERY STORAGE SYSTEM COMPLIANCE OPTION FOR ON-SITE SOLAR ELECTRIC GENERATION OR BATTERY STORAGE

BUILDING ENERGY EFFICIENCY STANDARDS CALIFORNIA CODE OF REGULATIONS
TITLE 24, PART 6

SUBCHAPTER 1
ALL OCCUPANCIES—GENERAL PROVISIONS

SECTION 100.0 – SCOPE
Buildings Covered. The provisions of Part 6 apply to all buildings:
That are of Occupancy Group A, B, E, F, H, I, M, R, S, or U; and
For which an application for a building permit or renewal of an existing permit is filed (or is required by law to be filed) on or after the effective date of the provisions, or which are constructed by a governmental agency; and
That are:
Unconditioned; or
Indirectly or directly conditioned, or process spaces.
Exception 1 to Section 100.0(a): Qualified historic buildings, as regulated by the California Historic Building Code (Title 24, Part 8). Lighting in qualified historic buildings shall comply with the applicable requirements in Section 140.6(a)3Q.
Exception 2 to Section 100.0(a): Building departments, at their discretion, may exempt temporary buildings, temporary outdoor lighting or temporary lighting in an unconditioned building, or structures erected in response to a natural disaster. Temporary buildings or structures shall be completely removed upon the expiration of the time limit stated in the permit.
Exception 3 to Section 100.0(a): Buildings in Occupancy Group I-3 and I-4.
Parts of Buildings Regulated. The provisions of Part 6 apply to the building envelope, space-conditioning systems, water-heating systems, pool and spas, solar ready buildings, indoor lighting systems of buildings, outdoor lighting systems, electrical power distribution systems, and signs located either indoors or outdoors, in buildings that are:
Covered by Section 100.0(a); and
Set forth in TABLE 100.0-A.
Habitable stories.
All conditioned space in a story shall comply with Part 6 whether or not the story is a habitable space.
All unconditioned space in a story shall comply with the lighting requirements of Part 6 whether or not the story is a habitable space.
Outdoor lighting and indoor and outdoor signs. The provisions of Part 6 apply to outdoor lighting systems and to signs located either indoors or outdoors as set forth in TABLE 100.0-A.
Sections applicable to particular buildings. TABLE 100.0-A and this subsection list the provisions of Part 6 that are applicable to different types of buildings covered by Section 100.0(a).
All buildings. Sections 100.0 through 110.12 apply to all buildings.
Exception to Section 100.0(e)1: Spaces or requirements not listed in TABLE 100.0-A.
Newly constructed buildings.

All newly constructed buildings. Sections 110.0 through 110.12 apply to all newly constructed buildings within the scope of Section 100.0(a). In addition, newly constructed buildings shall meet the requirements of Subsections B, C, D or E, as applicable.
Nonresidential and hotel/motel buildings that are mechanically heated or mechanically cooled.
Sections applicable. Sections 120.0 through 140.8 apply to newly constructed nonresidential buildings and hotels/motels that are mechanically heated or mechanically cooled.
Compliance approaches. In order to comply with Part 6, newly constructed nonresidential buildings and hotels/motels that are mechanically heated or mechanically cooled must meet the requirements of:
Mandatory measures: The applicable provisions of Sections 120.0 through 130.5; and
Either:
Performance approach: Section 140.1; or
Prescriptive approach: Sections 140.2 through 140.10.
Unconditioned nonresidential buildings and process space. Sections 110.9, 110.10, 120.6, 130.0
through 130.5, 140.3(c), 140.6, 140.7, and 140.8 apply to all newly constructed unconditioned buildings and 140.1, and 140.3(c), for process spaces within the scope of Section 100.0(a).
Single-family buildings.
Sections applicable. Sections 150.0 through 150.1 apply to newly constructed single-family buildings.
Compliance approaches. In order to comply with Part 6 newly constructed single-family buildings must meet the requirements of:
Mandatory measures: The applicable provisions of Sections 110.0 through 110.10, and 150.0; and
Either:
Performance approach: Sections 150.1(a) and (b); or
Prescriptive approach: Sections 150.1(a) and (c).
Exception to Section 100.0(e)2Diib: Seasonally occupied agricultural housing limited by state or federal agency contract to occupancy not more than 180 days in any calendar year.
Multifamily Buildings.
Sections applicable. Sections 160.0 through 170.2 apply to newly constructed multifamily buildings.
Compliance approaches. In order to comply with Part 6 newly constructed multifamily buildings must meet the requirements of:
Mandatory measures: The applicable provisions of Sections 110.0 through 110.10, and 160.0; and
Either:
Performance approach: Section 170.1; or
Prescriptive approach: Section 170.2(a) through (f).
Covered processes.
Sections applicable. Sections 110.2, 120.6 and 140.9 apply to covered processes.

Compliance approaches. In order to comply with Part 6, covered processes must meet the requirements of:
The applicable mandatory measures in Section 120.6; and
Either:
The performance approach requirements of Section 140.1; or
The prescriptive approach requirements of Section 140.9.
Note: If covered processes do not have prescriptive requirements, then only the applicable mandatory measures in Section 120.6 must be met.
New construction in existing buildings (additions, alterations and repairs).
Nonresidential and hotel/motel buildings. Section 141.0 applies to new construction in existing nonresidential, high-rise residential, and hotel/motel buildings. New construction in existing buildings includes additions, alterations and repairs. Section 141.0 specifies requirements that uniquely apply to additions, alterations or repairs to existing buildings, and specify which requirements in other sections also apply. For alterations that change the occupancy classification of the building, the requirements specified in Section 141.0 apply to the occupancy after the alterations.
Single-family buildings. Section 150.2 applies to new construction in existing single-family buildings. New construction in existing buildings includes additions, alterations and repairs. Section 150.2 specifies requirements that uniquely apply to additions, alterations or repairs to existing buildings, and specifies which requirements in other sections also apply. For alterations that change the occupancy classification of the building, the requirements specified in Section 150.2 apply to the occupancy after the alterations.
Multifamily buildings. Section 180.0 applies to new construction in existing multifamily buildings. New construction in existing buildings includes additions, alterations and repairs. Section 180.0 specifies requirements that uniquely apply to additions, alterations or repairs to existing buildings, and specifies which requirements in other sections also apply. For alterations that change the occupancy classification of the building, the requirements specified in Section 180.0 apply to the occupancy after the alterations.
Installation of insulation in existing buildings. Section 110.8(d) applies to buildings in which insulation is being installed in existing attics, or on existing water heaters, or existing space conditioning ducts.
Outdoor lighting. Sections 110.9, 130.0, 130.2, 130.4, 140.7, and 150.0 apply to newly constructed outdoor lighting systems, and Section 141.0 applies to outdoor lighting that is either added or altered.
Signs. Sections 130.0, 130.3 and 140.8 apply to newly constructed signs located either indoors or outdoors and Section 141.0 applies to sign alterations located either indoors or outdoors.
Mixed occupancy. When a building is designed and constructed for more than one type of occupancy (residential and nonresidential), the space for each occupancy shall meet the provisions of Part 6 applicable to that occupancy.
Exception 1 to Section 100.0(f): If one occupancy constitutes at least 80 percent of the conditioned floor area of the building, the entire building envelope, HVAC, and water heating may be designed to comply with the provisions of Part 6 applicable to that occupancy, provided that the applicable lighting requirements in Sections 140.6 through 140.8, 150.0(k), or 160.5 and 170.2(e) are met for each occupancy and space, and mandatory measures in Sections 110.0 through 130.5, 150.0, and 160.0 through 160.9 are met for each occupancy and space.
Exception 2 to Section 100.0(f): If one occupancy constitutes at least 90 percent of the combined conditioned plus unconditioned floor area of the building, the entire building indoor lighting may be designed to comply with only the lighting provisions of Part 6 applicable to that occupancy.

Administrative requirements. Administrative requirements relating to permit requirements, enforcement by the Commission, locally adopted energy standards, interpretations, claims of exemption, approved calculation methods, rights of appeal, and certification and labeling requirements of fenestration products and roofing products are specified in California Code of Regulations, Title 24, Part 1, Sections 10-101 to 10-114.
Certification Requirements for Manufactured Equipment, Products, and Devices. Part 6 limits the installation of manufactured equipment, products, and devices to those that have been certified as specified by sections
110.0 and 110.1. Requirements for manufactured equipment, products, and devices, when not specified in Title 24 Part 6, are specified in California Code of Regulations, Title 20, Sections 1601-1609.

TABLE 100.0-A APPLICATION OF STANDARDS

Occupancies	
Application	
Mandatory	
Prescriptive	
Performance	
Additions/Alterations	

All Buildings	
General	
100.0, 100.1, 100.2,
110.0	
100.0, 100.1, 100.2,
110.0	
100.0, 100.1, 100.2,
110.0	
100.0, 100.1, 100.2,
110.0	

Nonresidential, And Hotels/Motels	
General	
120.0	
140.0, 140.2	
140.0, 140.1	
141.0	

Nonresidential, And Hotels/Motels	
Envelope (conditioned)	
110.6, 110.7,
110.8,120.7	
140.3	
140.0, 140.1	
141.0	

Nonresidential, And Hotels/Motels	
Envelope (unconditioned
process spaces)	
N.A.	
140.3(c)	
140.0, 140.1	
141.0	

Nonresidential, And Hotels/Motels	
HVAC (conditioned)	
110.2, 110.5, 120.1,
120.2, 120.3, 120.4,
120.5, 120.8	
140.4	
140.0, 140.1	
141.0	

Nonresidential, And Hotels/Motels	
Water Heating	
110.3, 120.3, 120.8,
120.9	
140.5	
140.0, 140.1	
141.0	

Nonresidential, And Hotels/Motels	
Indoor Lighting (conditioned,
process spaces)	
110.9, 120.8, 130.0,
130.1, 130.4	
140.3(c), 140.6	
140.0, 140.1	
141.0	

Nonresidential, And Hotels/Motels	
Indoor Lighting (unconditioned and
parking garages)	
110.9, 120.8, 130.0,
130.1, 130.4	
140.3(c), 140.6	
N.A.	
141.0	

Nonresidential, And Hotels/Motels	
Outdoor Lighting	
110.9, 130.0, 130.2,
130.4	
140.7	
N.A.	
141.0	

Nonresidential, And Hotels/Motels	
Electrical Power Distribution	
110.11, 130.5	
N.A.	
N.A.	
141.0	

Nonresidential, And Hotels/Motels	
Pool and Spa Systems	
110.4, 110.5,
150.0(p)	
N. A.	
N.A.	
141.0	

Nonresidential, And Hotels/Motels	
Solar Ready Buildings	
110.10	
N.A.	
N.A.	
141.0(a)	

Nonresidential, And Hotels/Motels	
Solar PV and Battery Storage Systems	
N.A.	
140.10	
140.0, 140.1	
N.A.	

Covered Processes1	
Envelope, Ventilation, Process Loads	
110.2, 120.6	
140.9	
140.1	
120.6, 140.9, 141.1	

Signs	
Indoor and Outdoor	
110.9, 130.0, 130.3	
140.8	
N.A.	
141.0, 141.0(b)2H	

Single-Family	
General	
150.0	
150.1(a, c)	
150.1(a), 150.1(b)	
150.2(a), 150.2(b)	

Single-Family	
Envelope (conditioned)	
110.6, 110.7, 110.8,
150(a), 150.0(b),
150.0(c), 150.0(d),
150.0(e), 150.0(g),
150.0(q)	
150.1(a, c)	
150.1(a), 150.1(b)	
150.2(a), 150.2(b)	

Occupancies	Application	Mandatory	Prescriptive	Performance	Additions/Alterations	
Single-Family	HVAC (conditioned)	110.2, 110.5,
150.0(h), 150.0(i),
150.0(j), 150.0(m),
150.0(o)	150.1(a, c)	150.1(a), 150.1(b)	150.2(a), 150.2(b)	
Single-Family	Water Heating	110.3, 150.0(j, n)	150.1(a, c)	150.1(a), 150.1(b)	150.2(a), 150.2(b)	
Single-Family	Indoor Lighting (conditioned, unconditioned and parking garages)	110.9, 130.0,
150.0(k)	150.1(a, c)	150.1(a), 150.1(b)	150.2(a), 150.2(b)	
Single-Family	Outdoor Lighting	110.9,
130.0,150.0(k)	150.1(a, c)	150.1(a), 150.1(b)	150.2(a), 150.2(b)	
Single-Family	Pool and Spa Systems	110.4, 150.0(p)	N. A.	N.A.	150.2(a), 150.2(b)	
Single-Family	Solar Ready Buildings	110.10	N. A.	N.A.	N.A.	
Single-Family	Electric Ready	150.0(s), 150.0(t),
150.0(u), 150.0(v)	N.A.	N.A.	N.A.	
Single-Family	Solar PV Systems	N.A.	150.1(c)14	150.1(a), 150.1(b)	N.A.	
Multifamily	General	160.0	170.2	170.1	180.0	
Multifamily	Envelope (conditioned)	110.6, 110.7,
110.8, 160.1	170.1(a)	170.1	180.0	
Multifamily	Ventilation and Indoor Air Quality	160.2	N.A.	170.1	180.0	
Multifamily	HVAC (conditioned)	110.2, 110.5,
160.3	170.2(c)	170.1	180.0	
Multifamily	Water Heating	110.3, 160.4	170.2(d)	170.1	180.0	
Multifamily	Indoor Lighting	110.9, 160.5	170.2(e)	170.1	180.0	
Multifamily	Outdoor Lighting	110.9, 160.5	170.2(e)	170.1	180.0	
Multifamily	Electrical Power Distribution	110.11, 160.6	N.A.	N.A.	180.0	
Multifamily	Pool and Spa Systems	110.4, 110.5,
160.7	N.A.	N.A.	180.0	
Multifamily	Solar Ready Buildings	110.10, 160.8	N.A.	N.A.	180.0	
Multifamily	Electric Ready	160.9	N.A.	N.A.	N.A.	
Multifamily	Solar PV and Battery Storage Systems	N.A.	170.2(f), (g),
(h)	170.1	N.A.	
1 Nonresidential and hotel/motel buildings that contain covered processes may conform to the applicable requirements of both occupancy types listed in this table.
NOTE: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and 25943, Public Resources Code.

SECTION 100.1 – DEFINITIONS AND RULES OF CONSTRUCTION
Rules of Construction.
Where the context requires, the singular includes the plural and the plural includes the singular.
The use of "and" in a conjunctive provision means that all elements in the provision must be complied with, or must exist to make the provision applicable. Where compliance with one or more elements suffices, or where existence of one or more elements makes the provision applicable, "or" (rather than "and/or") is used.
"Shall" is mandatory and "may" is permissive.
Definitions. Terms, phrases, words and their derivatives in Part 6 shall be defined as specified in Section 100.1. Terms, phrases, words and their derivatives not found in Section 100.1 shall be defined as specified in the “Definitions” chapters of Title 24, Parts 1 through 5 of the California Code of Regulations. Where terms, phrases, words and their derivatives are not defined in any of the references above, they shall be defined as specified in Webster's Third New International Dictionary of the English Language, Unabridged (1961 edition, through the 2002 addenda), unless the context requires otherwise.
AAMA/WDMA/CSA 101/ I.S.2/A440-17 are the American Architectural Manufacturers Association/ Window and Door Manufacturers Association/ Canadian Standards Association document titled “North American Fenestration Standard/Specification for windows, doors, and skylights” (2017).
ACCA is the Air Conditioning Contractors of America.
ACCA MANUAL J is the Air Conditioning Contractors of America document titled “Manual J - Residential Load Calculation” (ANSI/ACCA 2 Manual J – 2016).
ACCEPTANCE REQUIREMENTS FOR CODE COMPLIANCE is a description of test procedures in the Reference Nonresidential Appendices that includes equipment and systems to be tested, functions to be tested, conditions under which the test shall be performed, the scope of the tests, results to be obtained, and measurable criteria for acceptable performance.
ACCESSIBLE is having access thereto, but which first may require removal or opening of access panels, doors, or similar obstructions.
ADDITION is any change to a building that increases conditioned floor area and conditioned volume. See also “newly conditioned space.” Addition is also any change that increases the floor area and volume of an unconditioned building of an occupancy group or type regulated by Part 6. Addition is also any change that increases the illuminated area of an outdoor lighting application regulated by Part 6.
ADIABATIC PAD is a material located before the heat transfer surface of an adiabatic condenser, which precools the ambient air by becoming fully wetted during precool mode operation.
AGRICULTURAL BUILDING is a structure designed and constructed to house farm implements, hay, grain, poultry, livestock or other horticultural products. It is not a structure that is a place of human habitation, a place of employment where agricultural products are processed, treated or packaged, or a place used by the public.
AHAM is the Association of Home Appliance Manufacturers.
AHAM HRH-2 is the Association of Home Appliance Manufacturers document titled "Residential Kitchen Range Hood Performance Test Procedures," 2020 (AHAM HRH-2).
AHAM RKRH-CPPG is the Association of Home Appliance Manufacturers document titled "Residential Kitchen Range Hood Certification Program Procedural Guide" 2020 (version 3).
AHRI is the Air-Conditioning, Heating, and Refrigeration Institute.
AHRI 210/240 is the Air-Conditioning, Heating, and Refrigeration Institute document titled “Performance Rating of Unitary Air-Conditioning and Air-Source Heat Pump Equipment,” 2017 (AHRI Standard 210/240-2017 with Addenda 1).

AHRI 310/380 is the Air-Conditioning, Heating, and Refrigeration Institute document titled “Packaged Terminal Air- Conditioners and Heat Pumps (CSA-C744-17),” 2004 (AHRI 310/380-2017).
AHRI 340/360 is the Air-Conditioning, Heating, and Refrigeration Institute document titled “Performance Rating of Commercial and Industrial Unitary Air-Conditioning and Heat Pump Equipment,” 2019 (AHRI Standard 340/360-(I-P)- 2019).
AHRI 365 is the Air-Conditioning, Heating, and Refrigeration Institute document titled " Performance Rating of Commercial and Industrial Unitary Air-Conditioning Condensing Units," 2009 (ANSI/AHRI Standard 365 (I-P)-2009).
ANSI/AHRI 390 is the Air-Conditioning, Heating, and Refrigeration Institute document titled "Performance Rating of Single Package Vertical Air-Conditioners and Heat Pumps," 2003 (ANSI/AHRI Standard 390 (I-P)-2003).
AHRI 400 is the Air-Conditioning, Heating, and Refrigeration Institute document titled " Performance Rating of Liquid to Liquid Heat Exchangers," 2015 (ANSI/AHRI Standard 400 (I-P)-2015).
AHRI 430 is the Air-Conditioning, Heating and Refrigeration Institute document titled “Performance Rating of Central Station Air-handling Unit Supply Fans”. 2020 (AHRI Standard 430 (I-P)-2020)
AHRI 440 is the Air-Conditioning, Heating and Refrigeration Institute document titled “Performance Rating of Fan-coil Units”. 2019 (AHRI Standard 440 (I-P)-2019)
AHRI 460 is the Air-Conditioning, Heating, and Refrigeration Institute document titled “Performance Rating of Remote Mechanical-Draft Air-Cooled Refrigerant Condensers,” 2005 (ANSI/AHRI Standard 460-2005).
AHRI 550/590 is the Air-Conditioning, Heating, and Refrigeration Institute document titled “Performance Rating of Water Chilling and Heat Pump Water-heating Packages Using the Vapor Compression Cycle,” 2020 (AHRI Standard 550/590 (I-P)- 2020).
AHRI 560 is the Air-Conditioning, Heating, and Refrigeration Institute document titled “Absorption Water Chilling and Water Heating Packages,” 2000 (AHRI Standard 560-2000).
AHRI 680 is the Air-Conditioning, Heating, and Refrigeration Institute document titled “Performance Rating of Residential Air Filter Equipment,” 2017 (AHRI Standard 680 2017).
AHRI 920 is the Air-Conditioning, Heating, and Refrigeration Institute document titled “Performance Rating of Direct Expansion-Dedicated Outdoor Air System Units” 2020 (AHRI Standard 920 (I-P)-2020).
AHRI 1060 is the Air-Conditioning, Heating, and Refrigeration Institute document titled “Performance Rating of Air-to-Air Exchangers for Energy Recovery Ventilation Equipment,” 2018 (AHRI Standard 1060 (I-P)-2018).
AHRI 1230 is the Air-Conditioning, Heating, and Refrigeration Institute document titled “Performance Rating of Variable Refrigerant Flow (VRF) Multi-Split Air-Conditioning and Heat Pump Equipment,” 2014 (AHRI Standard 1230-2014) with Addendum 1.
AHRI 1360 is the Air-Conditioning, Heating, and Refrigeration Institute document titled “Performance Rating of Computer and Data Processing Room Air Conditioners,” 2017 (AHRI Standard 1360 (I-P)-2017).
AIR, AVAILABLE TRANSFER is that portion of total outdoor ventilation air that is not required to satisfy other exhaust needs or to maintain pressurization of other spaces and that is transferable according to Section 120.1(g).
AIR, INFILTRATION is outdoor air that enters a building or space through openings in the building or space envelope due to negative pressure in the space or building relative to the exterior of the building envelope.
AIR, MAKEUP, or COMPENSATING OUTDOOR AIR is outdoor air that is intentionally conveyed by openings or ducts into the building from the outside; is supplied to the vicinity of an exhaust hood; and replaces air, vapor and contaminants being exhausted by the exhaust hood. Makeup air is generally filtered and fan-forced, and it may be heated or cooled. Makeup air may be delivered through openings or ducts integral to the exhaust hood.
AIR, REPLACEMENT is air that is used to replace air removed from a building through an exhaust system. Replacement air may be derived from one or more of the following: makeup air, portions of supply air, transfer air, or infiltration air.

AIR, SUPPLY is air entering a space from an air-conditioning, heating, or ventilating system for the purpose of comfort conditioning. Supply air is generally filtered, fan-forced, and heated, cooled, humidified or dehumidified as necessary to maintain specified temperature and humidity conditions.
AIR, TRANSFER is air transferred, whether actively by fans or passively by pressure differentials, from one room to another within a building through openings in the room envelope.
AIR BARRIER is a combination of interconnected materials and assemblies joined and sealed together to provide a continuous barrier to air leakage through the building envelope that separates conditioned from unconditioned space, or that separates adjoining conditioned spaces of different occupancies or uses.
AIR CONDITIONER is an appliance that supplies cooled and dehumidified air to a space for the purpose of cooling objects within the space.
AIR-COOLED AIR CONDITIONER is an air conditioner using an air-cooled condenser.
AIR CURTAIN UNIT means equipment providing a directionally-controlled stream of air moving across the entire height and width of an opening that reduces the infiltration or transfer of air from one side of the opening.
AIR FILTER, AIR FILTER EQUIPMENT, or AIR FILTER DEVICE is air-cleaning equipment used for removing particulate matter from the air.
AIR FILTER MEDIA is the part of the air filter equipment which is the actual particulate removing agent.
AIR-HANDLING UNIT or AIR HANDLER is a blower or fan that distributes supply air to a room, space, or area.
AIR-SOURCE HEAT PUMP is an appliance that consists of one or more factory-made assemblies, that includes an indoor conditioning coil, a compressor, and a refrigerant-to-air heat exchanger, and that provides heating and cooling functions.
AIR-TO-AIR HEAT EXCHANGER is a device which will reduce the heat losses or gains that occur when a building is mechanically ventilated, by transferring heat between the conditioned air being exhausted and outside air being supplied.
ALTERATION is any change to a building's water-heating system, space-conditioning system, lighting system, electrical power distribution system, or envelope that is not an addition. Alteration is also any change that is regulated by Part 6 to an outdoor lighting system that is not an addition. Alteration is also any change that is regulated by Part 6 to signs located either indoors or outdoors. Alteration is also any change that is regulated by Part 6 to a covered process that is not an addition. (See also “fenestration alteration”.)
ALTERED COMPONENT is a component that has undergone an alteration.
ALTERNATING CURRENT-OUTPUT UNINTERRUPTIBLE POWER SUPPLY (AC-OUTPUT UPS) is a combination of convertors,
switches, and energy storage devices, such as batteries, constituting a power system for maintaining continuity of load power in case of input power failure. Input power failure occurs when voltage and frequency are outside rated steady- state and transient tolerance bands or when distortion or interruptions are outside the limits specified for the uninterruptible power supply. An AC-output UPS is an uninterruptible power supply that supplies power with a continuous flow of electric charge that periodically reverses direction.
ALTERNATIVE CALCULATION METHODS (ACM) are compliance software, or alternative component packages, or exceptional methods approved by the Commission under Section 10-109. ACMs are also referred to as Compliance Software.
ALTERNATIVE CALCULATION METHODS (ACM) APPROVAL MANUAL are the documents establishing the requirements for Energy Commission approval of Compliance Software used to demonstrate compliance with the Building Energy Efficiency Standards for Residential and Nonresidential Buildings currently adopted by the Energy Commission.
AMCA is the Air Movement and Control Association.
ANNUAL FUEL UTILIZATION EFFICIENCY (AFUE) is a measure of the percentage of heat from the combustion of gas or oil which is transferred to the space being heated during a year, as determined using the applicable test method in the Appliance Efficiency Regulations or Section 110.2.
ANNUNCIATED is a type of visual signaling device that indicates the on, off, or other status of a load.

ANSI is the American National Standards Institute.
ANSI/AMCA 208 is the Air Movement and Control Association document titled “Calculation of the Fan Energy Index”. 2018 (ANSI/AMCA 208-18)
ANSI/AMCA 210 is the Air Movement and Control Association document titled “Laboratory Methods of Testing Fans for Certified Aerodynamic Performance Rating”. 2016 (ANSI/AMCA 210-16)
ANSI/AMCA STANDARD 500-D is the American National Standards Institute / Air Movement and Control Association document titled “Laboratory Methods of Testing Dampers for Rating.” 2018 (ANSI/AMCA 500-D-2018).
ANSI/ASABE S640 is the American National Standards Institute/American Society of Agricultural and Biological Engineers document titled “Quantities and Units of Electromagnetic Radiation for Plants (Photosynthetic Organisms),” 2017 (ANSI/ASABE S640 JUL2017).
ANSI/ASSPE Z9.5 is the American National Standards Institute document titled “Laboratory Ventilation,” 2012 (ANSI/AIHA/ASSPE Z9.5-2012).
ANSI C82.6 is the American National Standards Institute document titled “AMERICAN NATIONAL STANDARD FOR LAMP BALLASTS – Ballasts For High-Intensity Discharge Lamps – Methods of Measurement,” 2020 (ANSI C82.6-2015 (R2020)).
ANSI/CTA-2045-B is the American National Standards Institute document titled "Modular Communications Interface for Energy Management," 2021 (ANSI/CTA-2045-B-2021).
ANSI/NEMA WD 6 is the National Electrical Manufacturers Association Document titled, “American National Standard for Wiring Devices – Dimensional Specification,” 2016 (ANSI/NEMA WD 6-2016).
ANSI Z21.40.4a is the American National Standards Institute document titled “Performance Testing and Rating of Gas- Fired, Air Conditioning and Heat Pump Appliances,” 2017 (ANSI Z21.40.4a-1996 (R2017)/CGA 2.94a-M96(R2017)).
ANSI Z21.47 is the American National Standards Institute document titled “Gas-Fired Central Furnaces,” 2021 (ANSI Z21.47-2021/CSA 2.3-2021).
ANSI Z83.8 is the American National Standards Institute document titled “Gas Unit Heaters, Gas Packaged Heaters, Gas Utility Heaters and Gas-Fired Duct Furnaces,” 2016 (ANSI Z83.8 -2016/CSA 2.6-2016 (R2021)).
APPLIANCE EFFICIENCY REGULATIONS are the regulations in Title 20, Sections 1601 et seq. of the California Code of Regulations.
APPROVED CALCULATION METHOD (See “alternative calculation methods.”)
ASCE 7-16 is the American Society of Civil Engineers Standard 7-16.
ASHRAE is the American Society of Heating, Refrigerating, and Air-Conditioning Engineers.
ASHRAE CLIMATIC DATA FOR REGION X is the American Society of Heating, Refrigerating and Air-Conditioning Engineers document titled "ASHRAE Climatic Data for Region X, Arizona, California, Hawaii and Nevada,” Publication SPCDX, 1982 and “Supplement,” 1994.
ASHRAE HANDBOOK, APPLICATIONS VOLUME is the American Society of Heating, Refrigerating and Air-Conditioning Engineers document titled "ASHRAE Handbook: Heating, Ventilating, and Air-Conditioning Applications" (I-P) (2019).
ASHRAE HANDBOOK, FUNDAMENTALS VOLUME is the American Society of Heating, Refrigerating and Air-Conditioning Engineers document titled "ASHRAE Handbook: Fundamentals" (I-P) (2017).
ASHRAE HANDBOOK, SYSTEMS AND EQUIPMENT VOLUME is the American Society of Heating, Refrigerating and Air- Conditioning Engineers document titled "ASHRAE Handbook: Heating, Ventilating, and Air-Conditioning Systems and Equipment" (I-P) (2020).
ASHRAE STANDARD 52.2 is the American Society of Heating, Refrigerating and Air-Conditioning Engineers document titled "Method of Testing General Ventilation Air-Cleaning Devices for Removal Efficiency by Particle Size,” 2017 (ANSI/ASHRAE Standard 52.2-2017).
ASHRAE STANDARD 55 is the American Society of Heating, Refrigerating and Air-Conditioning Engineers document titled " Thermal Environmental Conditions for Human Occupancy,” 2020 (ANSI/ASHRAE Standard 55-2020).

ASHRAE STANDARD 62.1 is the American Society of Heating, Refrigerating and Air-Conditioning Engineers document titled “Ventilation for Acceptable Indoor Air Quality,” 2019 (ANSI/ASHRAE Standard 62.1-2019, including Addenda y, ao, P, B).
ASHRAE STANDARD 62.2 is the American Society of Heating, Refrigerating and Air-Conditioning Engineers document titled "Ventilation and Acceptable Indoor Air Quality in Residential Buildings,” 2019 (ANSI/ASHRAE Standard 62.2-2019 including ANSI/ASHRAE Addenda v and d - published in the 2020).
ASHRAE STANDARD 84 is the American National Standards Institute/American Society of Heating, Refrigerating and Air- Conditioning Engineers document titled “Method of Testing Air-to-Air Heat/Energy Exchangers”. 2020 (ANSI/ASHRAE 84- 2020).
ASHRAE STANDARD 90.1 is the American Society of Heating, Refrigerating and Air-Conditioning Engineers document titled “Energy Standards for Buildings Except Low-Rise Residential Buildings,” 2019 (ANSI/ASHRAE/IES Standards 90.1- 2019).
ASHRAE STANDARD 154 is the American Society of Heating, Refrigerating and Air-Conditioning Engineers document titled “Ventilation for Commercial Cooking Operations,” 2016 (ANSI/ASHRAE Standard 154-2016).
ASHRAE STANDARD 193 is the American Society of Heating, Refrigerating and Air-Conditioning Engineers document titled "Method of Test for Determining the Airtightness of HVAC Equipment," RA2014 (ANSI/ASHRAE Standard 193- RA2014).
ASME is the American Society of Mechanical Engineers.
ASME A17.1/CSA B44 is the American Society of Mechanical Engineers document titled “ Safety Code for Elevators and Escalators” 2019 (ASME A17.1-2019/CSAB44-19).
ASME A112.18.1/CSA B125.1 is the American Society of Mechanical Engineers document titled “Plumbing Supply Fittings,” 2018 (ASME A112.18.1-2018/CSA B125.1-18).
ASTM is the American Society for Testing and Materials International.
ASTM C55 is the American Society for Testing and Materials document titled “Standard Specifications for Concrete Building Brick,” 2017 (ASTM C55-17).
ASTM C177 is the American Society for Testing and Materials document titled “Standard Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Guarded-Hot-Plate Apparatus,” 2019 (ASTM C177-19).
ASTM C272 is the American Society for Testing and Materials document titled “Standard Test Method for Water Absorption of Core Materials for Sandwich Constructions,” 2018 (ASTM C272/C272M-18).
ASTM C335/C335M is the American Society for Testing and Materials document titled “Standard Test Method for Steady- State Heat Transfer Properties of Pipe Insulation,” 2017 (ASTM C335/C335M-17).
ASTM C518 is the American Society for Testing and Materials document titled “Standard Test Method for Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus,” 2017 (ASTM C518-17).
ASTM C731 is the American Society for Testing and Materials document titled “Standard Test Method for Extrudability, After Package Aging of Latex Sealants,” 2015 (ASTM C731-15).
ASTM C732 is the American Society for Testing and Materials document titled “Standard Test Method for Aging Effects of Artificial Weathering on Latex Sealants,” 2017 (ASTM C732-17).
ASTM C836 is the American Society for Testing and Materials document titled “Standard Specification for High Solids Content, Cold Liquid-Applied Elastomeric Waterproofing Membrane for Use with Separate Wearing Course,” 2018 (ASTM C836/C836M-18).
ASTM C1167 is the American Society for Testing and Materials document titled “Standard Specification for Clay Roof Tiles,” 2017 (ASTM C1167-11(2017)).
ASTM C1371 is the American Society for Testing and Materials document titled “Standard Test Method for Determination of Emittance of Materials Near Room Temperature Using Portable Emissometers,” 2015 (ASTM C1371-15.

ASTM C1492 is the American Society for Testing and Materials document entitled “Standard Specification for Concrete Roof Tile,” 2016 (ASTM C1492-03(2016)).
ASTM C1549 is the American Society for Testing and Materials document entitled "Standard Test Method for Determination of Solar Reflectance Near Ambient Temperature Using a Portable Solar Reflectometer,"2016 (ASTM C1549-16).
ASTM C1583 is the American Society for Testing and Materials document titled “Standard Test Method for Tensile Strength of Concrete Surfaces and the Bond Strength or Tensile Strength of Concrete Repair and Overlay Materials by Direct Tension (Pull-off Method),” 2020 (ASTM C1583/C1583M-20).
ASTM D448 is the American Society for Testing and Materials document titled "Standard Classification for Sizes of Aggregate for Road and Bridge Construction,"2017 (ASTM D448-12(2017)).
ASTM D522 is the American Society for Testing and Materials document titled “Standard Test Methods for Mandrel Bend Test of Attached Organic Coatings,” 2017 (ASTM D522/D522M-17).
ASTM D822 is the American Society for Testing and Materials document titled “Standard Practice for Filtered Open- Flame Carbon-Arc Exposures of Paint and Related Coatings,” 2018 (ASTM D822/D822M-13(2018)).
ASTM D1003 is the American Society for Testing and Materials document titled “Standard Test Method for Haze and Luminous Transmittance of Transparent Plastics,” 2021 (ANSI/ASTM D1003-21).
ASTM D1653 is the American Society for Testing and Materials document titled “Standard Test Methods for Water Vapor Transmission of Organic Coating Films,” 2021 (ASTM D1653-21).
ASTM D1863 is the American Society for Testing and Materials document titled "Standard Specification for Mineral Aggregate Used on Built-Up Roofs,"2018 (ASTM D1863/D1863M-05 (2018)).
ASTM D2202 is the American Society for Testing and Materials document titled “Standard Test Method for Slump of Sealants,” 2019 (ASTM D2202-00(2019))
ASTM D2370 is the American Society for Testing and Materials document titled “Standard Test Method for Tensile Properties of Organic Coatings,” 2016 (ASTM D2370-98-16).
ASTM D2824 is the American Society for Testing and Materials document titled “Standard Specification for Aluminum- Pigmented Asphalt Roof Coatings, Nonfibered, and Fibered without Asbestos,” 2018 (ASTM D2824/D2824M-18).
ASTM D3468 is the American Society for Testing and Materials document titled “Standard Specification for Liquid- Applied Neoprene and Chlorosulfonated Polyethylene Used in Roofing and Waterproofing,” 2020 (ASTM D3468/D3468M-99 (2020)).
ASTM D3805 is the American Society for Testing and Materials document titled “Standard Guide for Application of Aluminum-Pigmented Asphalt Roof Coatings,” 2016 (ASTM D3805/D3805M-16).
ASTM D4798 is the American Society for Testing and Materials document titled “Standard Practice for Accelerated Weathering Test Conditions and Procedures for Bituminous Materials (Xenon-Arc Method),” 2021 (ASTM D4798/D4798M-11(2021)).
ASTM D5870 is the American Society for Testing and Materials document titled “Standard Practice for Calculating Property Retention Index of Plastics,” 2016 (ASTM D5870-16).
ASTM D6083 is the American Society for Testing and Materials document titled “Standard Specification for Liquid Applied Acrylic Coatings Used in Roofing,” 2021 (ASTM D6083/D6083M-21).
ASTM D6694 is the American Society for Testing and Materials document titled “Standard Specification for Liquid- Applied Silicone Coating Used in Spray Polyurethane Foam Roofing Systems,” 2015 (ASTM D6694/D6694M-15).
ASTM E96 is the American Society for Testing and Materials document titled “Standard Test Methods for Water Vapor Transmission of Materials,” 2016 (ASTM E96/E96M-16).

ASTM E283 is the American Society for Testing and Materials document titled “Standard Test Method for Determining Rate of Air Leakage Through Exterior Windows, Skylight, Curtain Walls, and Doors Under Specified Pressure Differences Across the Specimen,” 2019 (ASTM E283/E238-19).
ASTM E408 is the American Society for Testing and Materials document titled “Standard Test Methods for Total Normal Emittance of Surfaces Using Inspection-Meter Techniques,” 2019 (ASTM E408-13(2019)).
ASTM E779 is the American Society for Testing and Materials document titled “Standard Test Method for Determining Air Leakage Rate by Fan Pressurization,” 2019 (ASTM E779-19).
ASTM E903 is the American Society for Testing and Materials document titled "Standard Test Method for Solar Absorptance, Reflectance, and Transmittance of Materials Using Integrating Spheres,"2020 (ASTM E903-20).
ASTM E972 is the American Society for Testing and Materials document titled "Standard Test Method for Solar Photometric Transmittance of Sheet Materials Using Sunlight,"2021 (ASTM E972-96(2021)).
ASTM E1175 is the American Society for Testing and Materials document titled "Standard Test Method for Determining Solar or Photopic Reflectance, Transmittance, and Absorptance of Materials Using a Large Diameter Integrating Sphere," 2015 (ASTM E1175-87(2015)).
ASTM E1677 is the American Society for Testing and Materials document titled “Standard Specification for Air Barrier (AB) Material or Assemblies for Low-Rise Framed Building Walls,” 2019 (ASTM E1677-19).
ASTM E1680 is the American Society for Testing and Materials document titled ”Standard Test Method for Rate of Air Leakage through Exterior Metal Roof Panel Systems,” 2016 (ASTM E1680-16).
ASTM E1918 is the American Society for Testing and Materials document titled "Standard Test Method for Measuring Solar Reflectance of Horizontal and Low-Sloped Surfaces in the Field,"2016 (ASTM E1918-16).
ASTM E1980 is the American Society for Testing and Materials document titled “Standard Practice for Calculating Solar Reflectance Index of Horizontal and Low-Sloped Opaque Surface,” 2019 (ASTM E1980-11(2019)).
ASTM E2178 is the American Society for Testing and Materials document titled "Standard Test Method for Determining Air Leakage Rate and Calculation of Air Permeance of Building Materials," 2021 (ASTM E21778-21).
ASTM E2357 is the American Society for Testing and Materials document titled "Standard Test Method for Determining Air Leakage Rate of Air Barrier Assemblies,” 2018 (ASTM E2357-18).
ASTM E3087 is the American Society for Testing and Materials document titled “Standard Test Method for Measuring Capture Efficiency of Domestic Range Hoods,” 2018 (ASTM E3087-18).
ATTIC is an enclosed space directly below the roof deck and above the ceiling beams.
AUTOMATED TELLER MACHINE (ATM) is any electronic information processing device which accepts or dispenses currency in connection with a credit, deposit, or convenience account without involvement by a clerk.
AUTOMATIC is capable of operating without human intervention.
AZIMUTH is the degrees of clockwise rotation from true north.
BACK-UP COMPRESSORS are those compressors not used to meet peak compressed air loads. Back-up compressors are physically connected to the compressed air piping system and can be automatically controlled to turn on if one of the online compressors fails. Back-up compressors do not normally operate.
BATTERY SYSTEM, STATIONARY STORAGE. A rechargeable energy storage system consisting of electrochemical storage batteries, battery chargers, controls, and associated electrical equipment designed to provide electrical power to a building. The system is typically used to provide standby or emergency power, and uninterruptable power supply, load shedding, load sharing or similar capabilities.
BELOW-GRADE WALL is the portion of a wall, enclosing conditioned space that is below the grade line.
BOILER SYSTEM is one or more boilers and their piping and controls that work together to supply steam or hot water to heat output devices remote from the boiler.
BUBBLE POINT is the liquid saturation temperature of a refrigerant at a specified pressure.

BUILDING is any structure or space covered by Section 100.0 of the Building Energy Efficiency Standards.
BUILDING COMMISSIONING is a systematic quality assurance process that spans the entire design and construction process, including verifying and documenting that building systems and components are planned, designed, installed, tested, operated and maintained to meet the owner’s project requirements.
BUILDING ENVELOPE is the ensemble of exterior and demising partitions of a building that enclose conditioned space.
CALL CENTER is a phone center that handles large number of phone calls including but not limited to help desk, customer and sales support, technical support, emergency response, telephone answering service, and inbound and outbound telemarketing.
CARBON DIOXIDE ENRICHMENT is injection of additional carbon dioxide into controlled environment horticulture spaces for the purpose of stimulating plant growth.
CASCADE REFRIGERATION SYSTEM is a type of refrigeration system that uses a low-stage refrigeration system where the heat rejected from condensing the low-stage refrigerant is absorbed using a heat-exchanger by a separate high-stage refrigeration system, and the ultimate heat rejection to ambient air is accomplished by the high-stage refrigeration system.
CEILING FAN means a nonportable device that is suspended from a ceiling or overhead structure for circulating air via the rotation of fan blades as defined in 10 CFR 430.2.
CENTRAL FAN VENTILATION COOLING SYSTEM (CFVCS) is a ducting arrangement including outside air ducts, motorized dampers, and an automatic control system that allows a residential space conditioning system central fan and ducts to distribute outside air throughout a residential dwelling unit, intending to reduce or eliminate the need for mechanical cooling.
CERTIFIED TO THE ENERGY COMMISSION means, when used in association with appliances, certified under Section 1606 of Title 20 of the California Code of Regulations; and otherwise means certified by the manufacturer in a declaration, executed under penalty of perjury under the laws of the State of California, that all the information provided pursuant to the certification is true, complete, accurate and in compliance with all applicable provisions of Part 6; and if applicable that the equipment, product, or device was tested under the applicable test method specified in Part 6.
CERTIFYING ORGANIZATION is an independent organization recognized by the Commission to certify manufactured devices for performance values in accordance with procedures adopted by the Commission.
CIE 13.3 is the International Commission on Illumination (Commission Internationale de l’Eclairage) document titled “Method of Measuring and Specifying Colour Rendering Properties of Light Sources,” 1995 (CIE 13.3-1995).
CIE 15 is the International Commission on Illumination (Commission Internationale de l’Eclairage) document titled “Technical Report: Colorimetry,” 2018 (CIE 15: 2018).
CIRCULATING FAN means a fan that is not a ceiling fan, but that is used to move air within a space that has no provision for connection to ducting or separation of the fan inlet from its outlet, and designed to be used for the general circulation of air.
CLIMATE ZONES are the 16 geographic areas of California for which the Commission has established typical weather data, prescriptive packages and energy budgets. Climate zones are defined by ZIP code and listed in Reference Joint Appendix JA2. FIGURE 100.1-A is an approximate map of the 16 Climate Zones.
CLOSED-CIRCUIT COOLING TOWER is a cooling tower that utilizes indirect contact between a heated fluid, typically water or glycol, and the cooling atmosphere to transfer the source heat load through sensible heat, latent heat, and mass transfer indirectly to the air, essentially combining a heat exchanger and cooling tower into an integrated and relatively compact device.
CODES, CALIFORNIA HISTORICAL BUILDING CODE is the California Historical Building Code, California Code of Regulations, Title 24, Part 8 and Part 2 (Chapter 34).
CODES, CBC is the 2022 California Building Code.
CODES, CEC is the 2022 California Electrical Code.

CODES, CFC is the 2022 California Fire Code.
CODES, CMC is the 2022 California Mechanical Code.
CODES, CPC is the 2022 California Plumbing Code.
COEFFICIENT OF PERFORMANCE (COP), COOLING is the ratio of the rate of net heat removal to the rate of total energy input, calculated under designated operating conditions and expressed in consistent units, as determined using the applicable test method in the Appliance Efficiency Regulations or Section 110.2.
COEFFICIENT OF PERFORMANCE (COP), HEATING is the ratio of the rate of net heat output to the rate of total energy input, calculated under designated operating conditions and expressed in consistent units, as determined using the applicable test method in the Appliance Efficiency Regulations or Section 110.2.
COEFFICIENT OF PERFORMANCE (COP), HEAT PUMP is the ratio of the rate of useful heat output delivered by the complete heat pump unit (exclusive of supplementary heating) to the corresponding rate of energy input, in consistent units and as determined using the applicable test method in Appliance Efficiency Regulations or Section 110.2.
COMBINED ENERGY EFFICIENCY RATIO (CEER) is the ratio of net cooling capacity (in Btu/hr) to total rate of electrical energy input (in watts) of a cooling system under designated operating conditions, including standby mode, as determined using the applicable test method in the Appliance Efficiency Regulations.
COMBUSTION AIR POSITIVE SHUT-OFF is a means of restricting airflow through a boiler combustion chamber during standby periods, used to reduce standby heat loss. A flue damper and a vent damper are two examples of combustion air positive shut-off devices.
COMBUSTION EFFICIENCY is a measure of the percentage of heat from the combustion of gas or oil that is transferred to the medium being heated or lost as jacket loss.
COMMERCIAL BOILER is a type of boiler with a capacity (rated maximum input) of 300,000 Btus per hour (Btu/h) or more and serving a space heating or water heating load in a commercial building.
COMMISSION is the California State Energy Resources Conservation and Development Commission, which is also referred to as the California Energy Commission.
COMPLEX MECHANICAL SYSTEMS are systems that include 1) fan systems each serving multiple thermostatically controlled zones; or 2) built-up air handler systems (nonunitary or nonpackaged HVAC equipment); or 3) hydronic or steam heating systems; or 4) hydronic cooling systems. Complex mechanical systems are NOT the following: 1) unitary or packaged equipment listed in Table 110.2-A, 110.2-B, 110.2-C, or 110.2-E that each serves one zone, or 2) two-pipe, heating only systems serving one or more zones.
COMPLIANCE SOFTWARE is software that has been approved pursuant to Section 10-109 of Part 1 of Title 24 of the California Code of Regulations, to demonstrate compliance with the performance approach of Part 6.
COMPRESSED AIR SYSTEM is a system of at least one compressor providing compressed air at 40 psig or higher.
COMPUTER ROOM is a room within a building whose primary function is to house electronic equipment and that has a design information technology equipment (ITE) equipment power density exceeding 20 watts/ft2 (215 watts/m2) of conditioned floor area.
CONDENSER is a refrigeration component that condenses refrigerant vapor by rejecting heat to air mechanically circulated over its heat transfer surface.
CONDENSER, ADIABATIC is a condenser that has the ability to use two heat transfer processes in series as accomplished by a single factory-made unit. The first heat transfer process is the precooling of the entering air by lowering the entering air drybulb temperature. The second heat transfer process is forced-air circulation cooling over the heat transfer surface of the condenser.
DRY MODE is an operating condition of an adiabatic condenser wherein the only means of heat transfer is accomplished through forced-air circulation over the heat transfer surface of the condenser without any precooling of the entering air.
PRECOOL MODE is an operating condition of an adiabatic condenser wherein the entering air is precooled.

CONDENSER SPECIFIC EFFICIENCY is the full load condenser Total Heat of Rejection (THR) capacity at standardized conditions divided by the fan input electric power (including but not limited to spray pump electric input power for evaporative condensers) at 100 percent rated fan speed.
CONDITIONED FLOOR AREA (CFA) is the floor area (in square feet) of enclosed conditioned space on all floors of a building, as measured at the floor level of the exterior surfaces of exterior walls enclosing the conditioned space.
CONDITIONED GREENHOUSE is a greenhouse that is provided with wood heating, mechanical heating that has a capacity exceeding 10 Btu/hr-ft², or mechanical cooling that has a capacity exceeding 5 Btu/hr-ft².
CONDITIONED SPACE is an enclosed space within a building that is directly conditioned or indirectly conditioned.
CONDITIONED SPACE, DIRECTLY is an enclosed space that is provided with wood heating, mechanical heating that has a capacity exceeding 10 Btu/hr-ft², or mechanical cooling that has a capacity exceeding 5 Btu/hr-ft², . Directly conditioned space does not include process space. (See “process space.”)
CONDITIONED SPACE, INDIRECTLY is enclosed space that (1) is not directly conditioned space; and (2) either (a) has a thermal transmittance area product (UA) to directly conditioned space exceeding that to the outdoors or to unconditioned space and does not have fixed vents or openings to the outdoors or to unconditioned space, or (b) is a space through which air from directly conditioned spaces is transferred at a rate exceeding three air changes per hour.
CONDITIONED VOLUME is the total volume (in cubic feet) of the conditioned space within a building.
CONTINUOUS INSULATION (c.i.) is insulation that is continuous across all assemblies that separate conditioned from unconditioned space. It is installed on the exterior or interior or is integral to any opaque surface of the building envelope and has no thermal bridges other than fasteners and necessary service openings.
CONTROLLED ATMOSPHERE is an airtight space maintained at reduced oxygen levels for the purpose of reducing respiration of perishable product in long term storage.
CONTROLLED ENVIRONMENT HORTICULTURE (CEH) SPACE is a building space dedicated to plant production by manipulating indoor environmental conditions, such as through electric lighting, irrigation, mechanical
heating, mechanical cooling, or dehumidification. CEH space does not include building space where plants are grown solely to decorate that same space.
COOLER is a space to be capable of operation at a temperature greater than or equal to 28°F but less than 55°F.
COOL ROOF is a roofing material with high thermal emittance and high solar reflectance, or low thermal emittance and exceptionally high solar reflectance as specified in Part 6 that reduces heat gain through the roof.
COOLING EQUIPMENT is equipment used to provide mechanical cooling for a room or rooms in a building.
CRAWL SPACE is a space immediately under the first floor of a building adjacent to grade.
CRRC-1 is the Cool Roof Rating Council document titled “Product Rating Program Manual.” (2021)
CTI is the Cooling Technology Institute.
CTI ATC-105 is the Cooling Technology Institute document titled “Acceptance Test Code for Cooling Towers,” 2019 (CTI ATC-105-19).
CTI ATC-105DS is the Cooling Technology Institute document titled “Acceptance Test Code for Dry Fluid Coolers, 2018 (CTI ATC-105DS (18)).
CTI ATC-105S(11) is the Cooling Technology Institute document titled “Acceptance Test Code for Closed-Circuit Cooling Towers,” 2011 (CTI ATC-105 11).
CTI ATC-106 is the Cooling Technology Institute document titled “Acceptance Test Code for Mechanical Draft Evaporative Vapor Condensers”, 2011 (CTI ATC-106 11).
CTI STD-201 is the Cooling Technology Institute document titled “Standard for the Certification of Water Cooling Thermal Performance,”2017 (CTI STD-201-RS(17)).
CURRENT AIR DEMAND is the actual cubic feet per minute (acfm) of total airflow necessary for end uses in a compressed air system.

C-VALUE (also known as C-factor) is the time rate of heat flow through unit area of a body induced by a unit temperature difference between the body surfaces, in Btu (hr × ft² × °F). It is not the same as K-value or K-factor.
CYCLES OF CONCENTRATION is the number of times the concentration of total dissolved solids (TDS) in cooling tower water is multiplied relative to the TDS in the makeup water. Because evaporation of pure water leaves dissolved solids behind in the system water, TDS increases over time as the tower operates. The number of times the dissolved minerals are concentrated is relative to the TDS in the makeup water. For example, five cycles of concentration represents five times the concentration of solids in the cooling tower system water relative to the TDS in the makeup water entering the tower.
DATA CENTER is a building whose primary function is to house computer room(s).
DAYLIT ZONE is the floor area under skylights or next to windows. Types of daylit zones include primary sidelit daylit zone, secondary sidelit daylit zone, and skylit daylit zone.
DEADBAND is the temperature range within which the HVAC system is neither calling for heating or cooling.
DECORATIVE GAS APPLIANCE is a gas appliance that is designed or installed for visual effect only, cannot burn solid wood, and simulates a fire in a fireplace.
DEDICATED OUTDOOR AIR SYSTEM (DOAS) is ventilation system that delivers 100 percent outdoor air and delivers ventilation supply air to each space, either directly or in conjunction with local or central space-conditioning systems serving those same spaces such as a DX-DOAS, HRV, ERV, or custom ventilation only unit.
DEGREE DAY, HEATING, is a unit, based upon temperature difference and time, used in estimating fuel consumption and specifying nominal annual heating load of a building. For any one day, when the mean temperature is less than 65°F, there exist as many degree days as there are Fahrenheit degrees difference in temperature between the mean temperature for the day and 65°F. The number of degree days for specific geographical locations are those listed in the Reference Joint Appendix JA2. For those localities not listed in the Reference Joint Appendix JA2, the number of degree days is as determined by the applicable enforcing agency.
DEHUMIDIFIER is a product other than a portable air conditioner, room air conditioner, or packaged terminal air conditioner that is a self-contained, electrically operated, and mechanically encased assembly consisting of
a refrigerated surface (evaporator) that condenses moisture from the atmosphere, 2) a refrigerating system, including an electric motor, 3) an air-circulating fan, and 4) a means for collecting or disposing of the condensate.
DEMAND FLEXIBILITY MEASURE is a measure that reduces TDV energy consumption using communication and control technology to shift electricity use across hours of the day to decrease energy use onpeak or increase energy use offpeak, including but not limited to battery storage, or HVAC or water heating load shifting.
DEMAND RESPONSE is short-term changes in electricity usage by end-use customers from their normal consumption patterns. Demand response may be in response to:
changes in the price of electricity; or
participation in programs or services designed to modify electricity use:
in response to wholesale market prices; or
when system reliability is jeopardized.
DEMAND RESPONSE PERIOD is a period of time during which electricity loads are modified in response to a demand response signal.
DEMAND RESPONSE SIGNAL is a signal that indicates a price or a request to modify electricity consumption for a limited time period.
DEMAND RESPONSIVE CONTROL is an automatic control that is capable of receiving and automatically responding to a demand response signal.
DEMISING PARTITION is a wall, fenestration, floor, or ceiling that separates conditioned space from enclosed unconditioned space or a controlled environment horticulture space.

DESICCANT DEHUMIDIFICATION SYSTEM is a mechanical dehumidification technology that uses a solid or liquid desiccant to remove moisture from the air.
DESIGN CONDITIONS are the parameters and conditions used to determine the performance requirements of space- conditioning systems. Design conditions for determining design heating and cooling loads are specified in Section 140.4(b) for nonresidential and hotel/motel buildings in Section 150.0(h) for single-family residential buildings, and in Sections 160.3(b) and 170.2(c) for multifamily buildings.
DESIGN HEAT GAIN RATE is the total calculated heat gain through the building envelope under design conditions.
DESIGN HEAT LOSS RATE is the total calculated heat loss through the building envelope under design conditions.
DESIGN REVIEW is an additional review of the construction documents (drawings and specifications) that seeks to improve compliance with existing Title 24 regulations, to encourage adoption of best practices in design, and to encourage designs that are constructible and maintainable. It is an opportunity for an experienced design engineer or architect to look at a project with a fresh perspective in an effort to catch missing or unclear design information and to suggest design enhancements.
DEW POINT TEMPERATURE is the vapor saturation temperature at a specified pressure for a substance undergoing phase change from vapor to liquid.
DIRECT DIGITAL CONTROL (DDC) is a type of control where controlled and monitored analog or binary data, such as temperature and contact closures, are converted to digital format for manipulation and calculations by a digital computer or microprocessor, then converted back to analog or binary form to control mechanical devices.
DIRECT-VENT APPLIANCE or “sealed combustion” appliance is an appliance that is constructed and installed so that air from combustion is derived directly from the outdoors and flue gases are discharged to the outdoors.
DISPLAY PERIMETER is the length of an exterior wall in a Group B; Group F, Division 1; or Group M, Occupancy that immediately abuts a public sidewalk, measured at the sidewalk level for each story that abuts a public sidewalk.
DOMESTIC WATER HEATING SYSTEMS (see “service water heating”).
DOOR is an operable opening in the building envelope, including swinging and roll-up doors, fire doors, pet doors and access hatches with less than 25 percent glazed area. When that operable opening has 25 percent or more glazed area it is a glazed door. See Fenestration: Glazed Door.
DOOR AREA is the total rough opening area which includes the door, and when present, the fenestration, and the fenestration frame components in the door frame assembly.
DRAIN WATER HEAT RECOVERY (DWHR) is a system that recovers heat from effluent in waste piping and uses it to preheat water in a domestic or service water heating system in order to reduce water heating energy usage.
DRY COOLER is a fan-powered heat rejection device that includes a water or glycol circuit connected by a closed circulation loop refrigerant condenser and is air-cooled.
DUAL-FUEL HEAT PUMP is an electric heat pump with gas furnace supplemental heat that alternates between the two fuel sources.
DUCT SEALING is a procedure for installing a space-conditioning distribution system that minimizes leakage of air from or to the distribution system. Minimum specifications for installation procedures, materials, diagnostic testing and field verification are contained in the Reference Residential Appendix RA3 and Reference Nonresidential Appendix NA1.
DUCT SYSTEM is all the ducts, duct fittings, plenums and fans when assembled to form a continuous passageway for the distribution of air.
DUCT WALL PENETRATIONS are openings to the duct wall made by pipes, holes, conduit, tie rods, or wires.
DUCTED SYSTEM is an air conditioner or heat pump, either a split system or single-packaged unit, that is designed to be permanently installed equipment and delivers conditioned air to an indoor space through a duct.
DWELLING is a building that contains one or two dwelling units used, intended or designed to be used, rented, leased, let or hired out to be occupied for living purposes.

DWELLING UNIT is a single unit providing complete, independent living facilities for one or more persons including access, permanent provisions for living, sleeping, eating, cooking and sanitation.
DWELLING UNIT, ATTACHED is a dwelling unit that shares a common wall or common floor/ceiling with another dwelling unit.
DWELLING UNIT, JUNIOR ACCESSORY, or JADU is a dwelling unit that is no more than 500 square feet in size and contained entirely within an existing single family building. A JADU includes a kitchen, a separate entrance from the main entrance to the building, and an interior entry to the main living area. A JADU may include separate sanitation facilities, or may share sanitation facilities with the existing single family building.
DX-DEDICATED OUTDOOR AIR SYSTEM UNIT (DX-DOAS) is a type of air-cooled, water-cooled, or water-source DOAS unit that dehumidifies 100 percent outdoor air and includes reheat that is capable of controlling the supply dry-bulb temperature of the dehumidified air to the designed supply air temperature. This conditioned outdoor air is then delivered directly or indirectly to the conditioned spaces. It may precondition outdoor air by containing an enthalpy wheel, sensible wheel, desiccant wheel, plate heat exchanger, heat pipes, or other heat or mass transfer apparatus.
EAST-FACING (See “orientation.”)
ECONOMIZER, AIR, is a ducting arrangement, including dampers, linkages, and an automatic control system that allows a cooling supply fan system to supply outside air to reduce or eliminate the need for mechanical cooling.
ECONOMIZER, PUMPED REFRIGERANT, is a system by which the supply air of a cooling system is cooled directly by refrigerant pumped between indoor and outdoor units during cooler ambient temperatures in order to reduce or eliminate the need for mechanical cooling.
ECONOMIZER, WATER, is a system by which the supply air of a cooling system is cooled directly or indirectly by evaporation of water in order to reduce or eliminate the need for mechanical cooling.
ELECTRICAL POWER DISTRIBUTION SYSTEMS. The following definitions are intended to apply to Section 130.5 only:
ELECTRICAL METERING is a device or system for measuring the electrical power and energy supplied to a customer or premise(s).
EQUIPMENT. A general term, including devices, luminaires, apparatus, machinery, and the like used as a part of, or in connection with, an electrical installation.
LOW VOLTAGE DRY-TYPE DISTRIBUTION TRANSFORMER is a distribution transformer that has an input voltage of 600 volts or less, that is air-cooled, and that does not use oil as a coolant.
PLUG LOAD is the energy consumed by any appliances or electronic device that is plugged into a receptacle or receptacle outlet. Plug loads are not related to general lighting, heating, ventilation, cooling, and water heating, domestic and service water system, renewable power, information technology equipment, computer room electronic equipment, and electric vehicle charging.
SERVICE is the conductors and equipment for delivering electric energy from the serving utility to the wiring system of the premise served.
SERVICE EQUIPMENT is the necessary equipment, usually consisting of a circuit breaker(s) or switch(es) and fuse(s) and their accessories, connected to the load end of service conductors to a building or other structure, or an otherwise designated area, and intended to constitute the main control and cutoff of the supply.
ELECTRONICALLY-COMMUTATED MOTOR is a brushless DC motor with a permanent magnet rotor that is surrounded by stationary motor windings, and an electronic controller that varies rotor speed and direction by sequentially supplying DC current to the windings.
EMITTANCE, THERMAL is the ratio of the radiant heat flux emitted by a sample to that emitted by a blackbody radiator at the same temperature.
ENCLOSED SPACE is space that is substantially surrounded by solid surfaces, including walls, ceilings or roofs, doors, fenestration areas, and floors or ground.

ENERGY BUDGET is the maximum energy consumption, based on Time Dependent Valuation (TDV) energy, that a proposed building, or portion of a building, can be designed to consume, calculated using Commission-approved compliance software as specified by the Alternative Calculation Method Approval Manual. The Energy Budget for newly constructed, low-rise residential buildings is expressed in terms of the Energy Design Rating.
ENERGY COMMISSION (CEC) is the California State Energy Resources Conservation and Development Commission.
ENERGY DESIGN RATING (EDR) is a way to express the energy consumption of a building as a rating score index where a score of 100 represents the energy consumption of the building built to the specifications of the Residential Energy Services (RESNET) reference home characterization of the 2006 International Energy Conservation Code (IECC) with Title 24, Part 6 modeling assumptions, and a score of 0 (zero) represents a building that has zero net energy consumption. The EDR is calculated using Commission-approved compliance software as specified by the Alternative Calculation Method Approval Manual.
ENERGY DESIGN RATING, ENERGY EFFICIENCY is an Energy Design Rating based on the TDV energy consumption of a building that results from the building’s energy efficiency characteristics, calculated using Commission-approved compliance software as specified by the Alternative Calculation Methods Approval Manual.
ENERGY DESIGN RATING, SOLAR ELECTRIC GENERATION AND DEMAND FLEXIBILITY is the reduction in TDV energy
consumption of a building expressed in terms of an Energy Design Rating reduction that results from the combination of the building’s solar electric generation system and demand flexibility measures.
ENERGY DESIGN RATING, TOTAL is the total Energy Design Rating for the building that is determined by subtracting the Solar Electric Generation System and Demand Flexibility Energy Design Rating from the Energy Efficiency Energy Design Rating.
ENERGY EFFICIENCY RATIO (EER) is the ratio of net cooling capacity (in Btu/hr) to total rate of electrical energy input (in watts), of a cooling system under designated operating conditions, as determined using the applicable test method in the Appliance Efficiency Regulations or Section 110.2.
ENERGY EFFICIENCY RATIO 2 (EER2) is the EER metric for residential central air conditioners effective January 1, 2023, as created by the U.S. Department of Energy “ISSUANCE 2016-11-30 Energy Conservation Program: Test Procedures for Central Air Conditioners and Heat Pumps, Final Rule”.
ENERGY MANAGEMENT CONTROL SYSTEM (EMCS) is an automated control system that regulates the energy consumption of a building by controlling the operation of energy consuming systems, and is capable of monitoring loads and adjusting operations in order to optimize energy usage and respond to demand response signals.
ENERGY OBTAINED FROM DEPLETABLE SOURCES is electricity purchased from a public utility, or any energy obtained from coal, oil, natural gas, or liquefied petroleum gases.
ENERGY OBTAINED FROM NONDEPLETABLE SOURCES is energy that is not energy obtained from depletable sources.
ENERGY STORAGE SYSTEM (ESS) is one or more devices, assembled together, that are capable of storing energy used for safely supplying electrical energy to selected loads at a future time.
ENFORCEMENT AGENCY is the city, county, or state agency responsible for issuing a building permit.
ENTHALPY RECOVERY RATIO (ERR) is a ratio of the change in enthalpy of the outdoor air supply to the difference in enthalpy between the entering supply airflow and the entering exhaust airflow, with no adjustment to account for that portion of the psychometric change in the leaving supply airflow that is the result of leakage of entering exhaust airflow rather than exchange of heat or moisture between the airstreams.
ENTIRE BUILDING is the ensemble of all enclosed space in a building, including the space for which a permit is sought, plus all existing conditioned and unconditioned space within the structure.
ENVELOPE (See “building envelope”.)
ESS READY INTERCONNECTION EQUIPMENT is equipment, including but not limited to an ESS ready panelboard, that can accommodate the connection of a distributed energy resource or an ESS capable of either automatic or manual isolation from the utility power source.

ESS READY PANELBOARD is a panelboard that can accommodate either automatic or manual switching between a utility power source to a distributed energy resource or an energy storage system, such as a split bus panelboard.
EXFILTRATION is uncontrolled outward air leakage from inside a building, including leakage through cracks and interstices, around windows and doors, and through any other exterior partition or duct penetration.
EXTERIOR FLOOR/SOFFIT is a horizontal exterior partition, or a horizontal demising partition, under conditioned space. For low-rise residential occupancies, exterior floors also include those on grade.
EXTERIOR PARTITION is an opaque, translucent, or transparent solid barrier that separates conditioned space from ambient air or space. For low-rise residential occupancies, exterior partitions also include barriers that separate conditioned space from unconditioned space, or the ground.
EXTERIOR ROOF/CEILING is an exterior partition, or a demising partition, that has a slope less than 60 degrees from horizontal, that has conditioned space below, and that is not an exterior door or skylight.
EXTERIOR ROOF/CEILING AREA is the area of the exterior surface of exterior roof/ceilings.
EXTERIOR WALL is any wall or element of a wall, or any member or group of members, which defines the exterior boundaries or courts of a building and which has a slope of 60 degrees or greater with the horizontal plane. An exterior wall or partition is not an exterior floor/soffit, exterior door, exterior roof/ceiling, window, skylight, or demising wall.
EXTERIOR WALL AREA is the area of the opaque exterior surface of exterior walls.
FAÇADE is the contiguous exterior of a building surface, but not limited to fenestration products.
FACTORY is a building, structure, or space designated as Factory Group F that is used for assembling, disassembling, fabricating, finishing, manufacturing, packaging, repair or processing operations.
FACTORY ASSEMBLED COOLING TOWERS are cooling towers constructed from factory-assembled modules either shipped to the site in one piece or put together in the field.
FAN, EMBEDDED is a fan that is part of a manufactured assembly where the assembly includes functions other than air movement.
FAN ARRAYS are multiple fans in parallel and in a single enclosure between two plenum sections in an air distribution system, where plenum means a compartment or chamber that forms a part of the air distribution system, and that is not used for occupancy or storage.
FAN ELECTRICAL INPUT POWER (FAN kWdesign) is the electrical input power in kilowatts required to operate an individual fan or fan array at design conditions. It includes the power consumption of motor controllers, if present.
FAN ENERGY INDEX (FEI) is the ratio of the electric input power of a reference fan to the electric input power of the actual fan as calculated per ANSI/AMCA 208-18 at fan system design conditions.
FAN NAMEPLATE ELECTRICAL INPUT POWER (kW) is the nominal electrical input power rating stamped on a fan assembly nameplate.
FAN SYSTEM includes all the fans that contribute to the movement of air through a point of a common duct, plenum, or cabinet.
FAN SYSTEM, COMPLEX means a fan system that combines a single-cabinet fan system with other supply fans, exhaust fans, or both.
FAN SYSTEM, EXHAUST/RELIEF is a fan system dedicated to the removal of air from interior spaces to the outdoors.
FAN SYSTEM, MULTI-ZONE VARIABLE AIR VOLUME (VAV) is a fan system that serves three or more space-conditioning zones where airflow to each zone is individually controlled based on heating, cooling and/or ventilation requirements, indoor fan airflow varies as a function of load, and the sum of the minimum zone airflows is 40% or less of the fan system design conditions.
FAN SYSTEM, RETURN is a fan system dedicated to removing air from interior spaces where some or all of the air is to be recirculated except during economizer operation.

FAN SYSTEM, SINGLE-CABINET is a fan system where a single fan, single fan array, a single set of fans operating in parallel, or fans or fan arrays in series and embedded in the same cabinet, that both supplies air to a space and recirculates the air.
FAN SYSTEM, SUPPLY-ONLY is a fan system that provides supply air to interior spaces and does not recirculate the air.
FAN SYSTEM, TRANSFER is a fan system that exclusively moves air from one occupied space to another.
FAN SYSTEM AIRFLOW (cfm) is the sum of the airflow of all fans with fan electrical input power greater than 1 kW at fan system design conditions, excluding the airflow that passes through downstream fans with fan input power less than 1 kW.
FAN SYSTEM DESIGN CONDITIONS are operating conditions that can be expected to occur during normal system operation that result in the highest supply airflow rate to or from the conditioned spaces served by the fan system.
FAN SYSTEM ELECTRICAL INPUT POWER (Fan kWdesign,system) is the sum of the fan electrical input power (Fan kWdesign) in kilowatts of all fans that are required to operate at fan system design conditions to supply air from the heating or cooling source to the conditioned spaces, return it to the source, exhaust it to the outdoors, or transfer it to another space.
FENESTRATION: Includes the following:
ACE is an NFRC-Approved Calculation Entity that conducts calculations of fenestration product ratings for certification authorization using the NFRC Component Modeling approach and issues label certificates to Specifying Authorities for product certification authorization in accordance with NFRC requirements.
ALTERED COMPONENT is a new fenestration component that has undergone an alteration other than a repair and is subject to all applicable standards requirements.
BAY WINDOW is a combination assembly which is composed of three or more individual windows either joined side by side or installed within opaque assemblies and which projects away from the wall on which it is installed. Center windows, if used are parallel to the wall on which the bay is installed, the end panels or two side windows are angled with respect to the center window. Common angles are 30° and 45°, although other angles may be employed.
CHROMOGENIC GLAZING is a class of switchable glazing that includes active materials (e.g. electrochromic) and passive materials (e.g. photochromic and thermochromic) permanently integrated into the glazing assembly. Their primary function is to switch reversibly from a high transmission state to a low transmission state with associated changes in VT and SHGC.
CLERESTORY FENESTRATION is fenestration installed above a roofline greater than or equal to 60° from the horizontal, or any portion of exterior vertical glazing greater than eight feet per floor above the finished floor of a space.
CMA (component modeling approach) is a fenestration product certification program from the National Fenestration Rating Council (NFRC) that enables energy-related performance ratings for nonresidential fenestration products, including the thermal performance U-factor, Solar Heat Gain Coefficient, and Visible Transmittance.
CMAST (Component Modeling Approach Software Tool) is an NFRC approved software that allows a user to create a fenestration product “virtually,” and generate its energy-related performance ratings, including the thermal performance U-factor, Solar Heat Gain Coefficient, and Visible Transmittance.
CURTAIN WALL/STOREFRONT is an external non-bearing wall intended to separate the exterior nonconditioned and interior conditioned spaces. It also consists of any combination of framing materials, fixed glazing, opaque glazing, operable windows, or other in-fill materials. Note: Window wall is also included as part of the curtain wall/storefront fenestration category.
DUAL-GLAZED GREENHOUSE WINDOWS is a double glass pane separated by an air or other gas space that adds conditioned volume but not conditioned floor area to a building.
DYNAMIC GLAZING SYSTEMS are glazing systems that have the ability to reversibly change their performance properties, including U-factor, Solar Heat Gain Coefficient (SHGC), and/or Visible Transmittance (VT) between well- defined end points. These may include, but are not limited to chromogenic glazing systems and integrated shading

systems (defined below). Dynamic Glazing systems do not include internally mounted or externally mounted shading devices that attach to the window framing/glazing that may or may not be removable.
FENESTRATION ALTERATION is any change to an existing building's exterior fenestration product that is not a repair (see “fenestration repair”) that:
Replaces existing fenestration in an existing wall or roof with no net area added; or
Replaces existing fenestration and adds new net area in the existing wall or roof; or
Adds a new window that increases the net fenestration area to an existing wall or roof.
FENESTRATION AREA is the rough opening area of any fenestration product.
FENESTRATION PRODUCT is any transparent or translucent material plus any sash, frame, mullions and dividers, in the facade of a building, including, but not limited to, windows, glazed doors, skylights, curtain walls, dynamic glazing, garden windows and, glass block, and glazing used in greenhouses.
FENESTRATION REPAIR is the reconstruction or renewal for the purpose of maintenance of any fenestration product, component or system and shall not increase the preexisting energy consumption of the repaired fenestration product, component, system, or equipment. Replacement of any component, system, or equipment for which there are requirements in the Standards are considered an alteration (see “fenestration”, “alteration”) and not a repair and is subject to the requirements of Part 6 of the Standards.
FIELD-FABRICATED is a fenestration product whose frame is made at the construction site of standard dimensional lumber or other materials that were not previously cut, or otherwise formed with the specific intention of being used to fabricate a fenestration product. Field fabricated does not include site-built fenestration.
FIN is an opaque surface, oriented vertically and projecting outward horizontally from an exterior vertical surface.
FIN OFFSET is the horizontal distance from the edge of exposed exterior glazing at the jamb of a window to the fin.
FIN PROJECTION is the horizontal distance, measured outward horizontally, from the surface of exposed exterior glazing at the jamb of a window to the outward edge of a fin.
FIXED is fenestration that is not designed to be opened or closed.
GLAZED DOOR is an exterior door having a glazed area of 25 percent or greater of the area of the door. Glazed doors shall meet fenestration product requirements. See “door.”
GREENHOUSE or GARDEN WINDOW is a window unit that consists of a three-dimensional, five-sided structure generally protruding from the wall in which it is installed. Operating sash may or may not be included.
HORIZONTAL SLATS, when referring to a daylighting device, is a set of adjacent surfaces located directly adjacent to vertical fenestration, oriented horizontally and projecting horizontally from its interior or exterior vertical surface.
INTEGRATED SHADING SYSTEM is a class of fenestration products including an active layer: e.g. shades, louvers, blinds or other materials permanently integrated between two or more glazing layers. The U-factor and/or SHGC and VT of the insulating glass assembly can be altered by reversibly changing the enclosed active layer.
LIGHT SHELF is an adjacent, opaque surfaced daylighting device located at the sill of clerestory glazing, oriented horizontally and projecting horizontally from an interior or exterior vertical surface.
MANUFACTURED or KNOCKED DOWN PRODUCT is a fenestration product constructed of materials which are factory cut or otherwise factory formed with the specific intention of being used to fabricate a fenestration product. Knocked down or partially assembled products may be sold as a fenestration product when provided with temporary and permanent labels as described in Section 10-111; or as a site-built fenestration product when not provided with temporary and permanent labels as described in Section 10-111.
NFRC 100 is the National Fenestration Rating Council document titled “Procedure for Determining Fenestration Product U-factors.” (2020) (ANSI/NFRC 100-2020).
NFRC 200 is the National Fenestration Rating Council document titled “Procedure for Determining Fenestration Product Solar Heat Gain Coefficients and Visible Transmittance at Normal Incidence.” (2020) (ANSI/NFRC 200-2020).

NFRC 202 is the National Fenestration Rating Council document titled “Procedures for Determining Translucent Fenestration Product Visible Transmittance at Normal Incidence.” (2020) (ANSI/NFRC 202-2020).
NFRC 203 is the National Fenestration Rating Council document titled “Procedure for Determining Visible Transmittance of Tubular Daylighting Devices.” (2020) (ANSI/NFRC 203-2020).
NFRC 400 is the National Fenestration Rating Council document titled “Procedure for Determining Fenestration Product Air Leakage.” (2020) (ANSI/NFRC 400-2020).
OPERABLE SHADING DEVICE is a device at the interior or exterior of a building or integral with a fenestration product, which is capable of being operated, either manually or automatically, to adjust the amount of solar radiation admitted to the interior of the building.
RELATIVE SOLAR HEAT GAIN COEFFICIENT (RSHGC) is the ratio of solar heat gain through a fenestration product (corrected for external shading) to the incident solar radiation. Solar heat gain includes directly transmitted solar heat and absorbed solar radiation, which is then reradiated, conducted, or convected into the space.
SITE-BUILT is fenestration designed to be field-glazed or field assembled units using specific factory cut or otherwise factory formed framing and glazing units, that are manufactured with the intention of being assembled at the construction site. These include storefront systems, curtain walls, and atrium roof systems.
SKYLIGHT ROOF RATIO (SRR) is the ratio of the skylight area to the gross exterior roof area.
SOLAR HEAT GAIN COEFFICIENT (SHGC) is the ratio of the solar heat gain entering the space through the fenestration area to the incident solar radiation. Solar heat gain includes directly transmitted solar heat and absorbed solar radiation, which is then reradiated, conducted, or convected into the space.
SPANDRAL is opaque glazing material most often used to conceal building elements between floors of a building so they cannot be seen from the exterior, also known as “opaque in-fill systems”.
TINTED GLASS is colored glass by incorporation of a mineral admixture resulting in a degree of tinting. Any tinting reduces both visible and radiant transmittance.
VERTICAL FENESTRATION is all fenestration other than skylights and doors.
VISIBLE REFLECTANCE is the reflectance of light at wavelengths from 410 to 722 nanometers.
VISIBLE TRANSMITTANCE (VT) is the ratio (expressed as a decimal) of visible light that is transmitted through a glazing fenestration. The higher the VT rating, the more light is allowed through a window.
WINDOW is fenestration that is not a skylight and that is an assembled unit consisting of a frame and sash component holding one or more pieces of glazing.
WINDOW AREA is the area of the surface of a window, plus the area of the frame, sash, and mullions.
WINDOW HEAD HEIGHT is the height from the floor to the top of the vertical fenestration.
WINDOW WALL RATIO (WWR) is the ratio of the window area to the gross exterior wall area.
FIELD ERECTED COOLING TOWERS are cooling towers which are custom designed for a specific application and which cannot be delivered to a project site in the form of factory assembled modules due to their size, configuration, or materials of construction.
FIREPLACE is a hearth and fire chamber, or similar prepared place, in which a fire may be made and which is built in conjunction with a flue or chimney, including but not limited to factory-built fireplaces, masonry fireplaces, and masonry heaters as further clarified in the CBC.
FLOOR/SOFFIT TYPE is a type of floor/soffit assembly having a specific heat capacity, framing type, and U-factor.
FLUID COOLER is a fan-powered heat rejection device that includes a water or glycol circuit connected by a closed circulation loop to a liquid-cooled refrigerant condenser, and may be either evaporative-cooled, air-cooled, or a combination of the two.
FLUX is the rate of energy flow per unit area.

FOOD PREPARATION EQUIPMENT is cooking equipment intended for commercial use, including coffee machines, espresso coffee makers, conductive cookers, food warmers including heated food servers, fryers, griddles, nut warmers, ovens, popcorn makers, steam kettles, ranges, and cooking appliances for use in commercial kitchens, restaurants, or other business establishments where food is dispensed.
FREEZER is a space designed to be capable of operation at less than 28°F.
GAS COOLER is a refrigeration component that reduces the temperature of a refrigerant vapor by rejecting heat to air mechanically circulated over its heat transfer surface. Used by a CO2 refrigeration system in transcitical mode, and normally also capable of operating in subcritical mode.
GAS COOLING EQUIPMENT is cooling equipment that produces chilled water or cold air using natural gas or liquefied petroleum gas as the primary energy source.
GAS HEATING SYSTEM is a system that uses natural gas or liquefied petroleum gas as a fuel to heat a conditioned space.
GAS LOG is a self-contained, free-standing, open-flame, gas-burning appliance consisting of a metal frame or base supporting simulated logs, and designed for installation only in a vented fireplace.
GLAZING (See “fenestration product.”)
GLOBAL WARMING POTENTIAL (GWP) is the radiative forcing impact of one mass-based unit of a given greenhouse gas relative to an equivalent unit of carbon dioxide over a given period of time.
GLOBAL WARMING POTENTIAL VALUE (GWP Value) is the 100-year GWP value published by the Intergovernmental Panel on Climate Change (IPCC) in either its Second Assessment Report (SAR) (IPCC, 1995), or its Fourth Assessment A-3 Report (AR4) (IPCC, 2007). Both the 1995 IPCC SAR values and the 2007 IPCC AR4 values are published in Table 2.14 of the 2007 IPCC AR4. The SAR GWP values are found in column “SAR (100-yr)” of Table 2.14.; the AR4 GWP values are found in column “100 yr” of Table 2.14.”
GOVERNMENTAL AGENCY is any public agency or subdivision thereof, including, but not limited to, any agency of the state, a county, a city, a district, an association of governments, or a joint power agency.
GROSS EXTERIOR ROOF AREA is the sum of the skylight area and the exterior roof/ceiling area.
GROSS EXTERIOR WALL AREA is the sum of the window area, door area, and exterior wall area.
HABITABLE SPACE is space in a building for living, sleeping, eating or cooking, excluding bathrooms, toilets, hallways, storage areas, closets, utility rooms and similar areas. (See also “occupiable space”.)
HABITABLE STORY is a story that contains habitable space and that has at least 50 percent of its volume above grade.
HEALTHCARE FACILITY is any building or portion thereof licensed pursuant to California Health and Safety Code Division 2, Chapter 1, §1204 or Chapter 2, §1250.
HEAT CAPACITY (HC) is the measurable physical quantity that characterizes the amount of heat required to change a substance's temperature by a given amount.
HEAT PUMP is an appliance, that consists of one or more assemblies; that uses an indoor conditioning coil, a compressor, and a refrigerant-to-outdoor air heat exchanger to provide air heating; and that may also provide air cooling, dehumidifying, humidifying, circulating, or air cleaning.
HEAT PUMP WATER HEATER (HPWH) is a water heater that transfers thermal energy from one temperature level to a higher temperature level for the purpose of heating water, including all ancillary equipment such as fans, storage tanks, pumps, or controls necessary for the device to perform its function.
MULTI-PASS HEAT PUMP WATER HEATER is a HPWH in which the cold water passes through the heat pump(s) multiple times, each time gaining a temperature increase, until the tank reaches the intended storage temperature.
SINGLE-PASS HEAT PUMP WATER HEATER is a HPWH in which the cold water passes through the heat pump(s) once and is heated to the intended storage temperature.

HEATED SLAB FLOOR is a concrete floor either, on-grade, raised, or a lightweight concrete slab topping. Heating is provided by a system placed within or under the slab, and is sometimes referred to as a radiant slab floor.
HEATING EQUIPMENT is equipment used to provide mechanical heating for a room or rooms in a building.
HEATING SEASONAL PERFORMANCE FACTOR (HSPF) is the total heating output of a central air-conditioning heat pump (in Btu) during its normal use period for heating divided by the total electrical energy input (in watt-hours) during the same period, as determined using the applicable test method in the Appliance Efficiency Regulations.
HEATING SEASONAL PERFORMANCE FACTOR 2 (HSPF2) is the HSPF metric for residential central heat pumps effective January 1, 2023, as created by the U.S. Department of Energy “ISSUANCE 2016-11-30 Energy Conservation Program: Test Procedures for Central Air Conditioners and Heat Pumps, Final Rule.”
HIGH-RISE RESIDENTIAL BUILDING is a building, other than a hotel/motel, of Occupancy Group R-2 or R-4 with four or more habitable stories.
HORTICULTURAL LIGHTING consists of luminaires used for plant growth and maintenance. Horticultural luminaires may have either plug-in or hard-wired connections for electric power.
HOTEL/MOTEL is a building or buildings that has six or more guest rooms or a lobby serving six or more guest rooms, where the guest rooms are intended or designed to be used, or which are used, rented, or hired out to be occupied, or which are occupied for sleeping purposes by guests, and all conditioned spaces within the same building envelope.
Hotel/motel includes all conditioned spaces which are (1) on the same property as the hotel/motel, (2) served by the same central heating, ventilation, and air-conditioning system as the hotel/motel, and (3) integrally related to the functioning of the hotel/motel as such, including, but not limited to, exhibition facilities, meeting and conference facilities, food service facilities, lobbies, and laundries. Hotel/motel also includes the following:
A building of Occupancy Group R-1,
Vacation timeshare properties and hotel or motel buildings of Occupancy Group R-2, and The following types of Occupancy Group R-3:
Congregate residences for transient use, Boarding houses of more than 6 guests, and
Alcohol or drug abuse recovery homes of more than 6 guests.
HVAC SYSTEM is a space-conditioning system or a ventilation system.
HVI 915 is the Home Ventilating Institute document titled “HVI Loudness Testing and Rating Procedure,” 2020 (HVI Publication 915-2020).
HVI 916 is the Home Ventilating Institute document titled “VI Airflow Test Procedure,” 2020 (HVI Publication 916-2020).
HVI 920 is the Home Ventilating Institute document titled “HVI Product Performance Certification Procedure Including Verification and Challenge,” 2020 (HVI Publication 920-2020).
IES HB (See “IES Lighting Library.”)
IES LIGHTING LIBRARY, formerly called the “IES Lighting Handbook (IES HB),” is the Illuminating Engineering Society document titled “The IES Lighting LibraryTM.”
INTEGRATED SEASONAL COEFFICIENT OF PERFORMANCE (ISCOP) is a seasonal efficiency number that is a combined value based on the formula listed in AHRI Standard 920 of the two COP values for the heating season of a DX-DOAS unit water or air source heat pump, expressed in W/W.
INTEGRATED SEASONAL MOISTURE REMOVAL EFFICIENCY (ISMRE) is a seasonal efficiency number that is a combined value based on the formula listed in AHRI Standard 920 of the four dehumidification moisture removal efficiency (MRE) ratings required for DX-DOAS units, expressed in lb. of moisture/kWh.
IES LM-79-19 is an American National Standard authored by the Illuminating Engineering Society and titled, “Approved Method: Optical and Electrical Measurements of Solid State Lighting Products” (2019) (ANSI/IES LM-79-19).

IES LS-1-20 is the American National Standard authored by the Illuminating Engineering Society and titled "Lighting Science: Nomenclature and Definitions for Illuminating Engineering" 2020 (ANSI/IES LS-1-20)
IES TM-15-20 is an American National Standard authored by the Illuminating Engineering Society and titled “Technical Memorandum: Luminaire Classification Systems for Outdoor Luminaires” (2020) (ANSI/IES TM-15-20).
INDOOR GROWING is a type of CEH space in a building with a Skylight Roof Ratio less than 50 percent. Growing plants in a warehouse with or without skylights is an example of indoor growing.
INFILTRATION is uncontrolled inward air leakage from outside a building or unconditioned space, including leakage through cracks and interstices, around windows and doors, and through any other exterior or demising partition or pipe or duct penetration. See AIR BARRIER.
INFORMATION TECHNOLOGY EQUIPMENT (ITE) includes computers, data storage, servers, and network/communication equipment located in a computer room.
INTEGRATED ENERGY EFFICIENCY RATIO (IEER) is a single-number cooling part load efficiency figure of merit calculated as specified by the method described in ANSI/AHRI Standard 340/360/1230 . This metric replaces the IPLV for ducted and non-ducted units.
INTEGRATED HVAC SYSTEM is an HVAC system designed to handle both sensible and latent heat removal. Integrated HVAC systems may include, but are not limited to: HVAC systems with a sensible heat ratio of 0.65 or less and the capability of providing cooling, dedicated outdoor air systems, single package air conditioners with at least one refrigerant circuit providing hot gas reheat, and dehumidifiers modified to allow external heat rejection.
INTEGRATED PART LOAD VALUE (IPLV) is a single-number cooling part-load efficiency figure of merit calculated as specified by the method described in ANSI/AHRI Standard 550/590 for use with chillers.
ISO 5801 is the International Organization for Standardization document titled “Fans – Performance testing using standardized airways”. 2017 (ISO 5801:2017)
ISO 13256-1 is the International Organization for Standardization document titled "Water-source heat pumps -- Testing and rating for performance - Part 1: Water-to-air and brine-to-air heat pumps," 2012 (ANSI/AHRI/ASHRAE ISO 13256- 1:1998 (RA 2012).
ISO 13256-2 is the International Organization for Standardization document titled "Water-source heat pumps - Testing and rating for performance - Part 1: Water-to-water and brine-to-water heat pumps," 2012 ( ANSI/AHRI/ASHRAE ISO 13256-2 (R2012)).
ISO 17025 is the International Organization for Standardization document titled "General Criteria for the Competence of Testing and Calibration Laboratories", 2017 (ISO/IEC 17025:2017).
ITE DESIGN LOAD is the combined power of all the ITE loads for which the ITE cooling system is designed.
LANGELIER SATURATION INDEX (LSI) is expressed as the difference between the actual system pH and the saturation pH. LSI indicates whether water will precipitate, dissolve, or be in equilibrium with calcium carbonate, and is a function of hardness, alkalinity, conductivity, pH and temperature.
LARGEST NET CAPACITY INCREMENT is the largest increase in capacity when switching between combinations of base compressors that is expected to occur under the compressed air system control scheme.
LIGHTING definitions:
Accent Lighting is directional lighting to emphasize a particular object or surface feature, or to draw attention to a part of the field of view. It can be recessed, surface mounted, or mounted to a pendant, stem, or track, and can be display lighting. It shall not provide general lighting.
Astronomical Time-Switch Control is a lighting control that controls lighting based on the time of day and astronomical events such as sunset and sunrise, accounting for geographic location and calendar date.
Automatic Daylight Control adjusts the luminous flux of the electric lighting system in either a series of steps or by continuous dimming in response to available daylight. This kind of control uses one or more photosensors to detect changes in daylight illumination and then automatically adjusts the electric lighting levels in response.

Automatic Scheduling Control is a time-based lighting control that is capable of being programmed to reduce or turn off lighting power for a portion of the night and to turn off lighting power for the day.
Automatic Time Switch Control controls lighting based on the time of day.
Captive-Key Override is a type of lighting control in which the key that activates the override cannot be released when the lights are in the on position.
Chandelier is a ceiling-mounted, close-to-ceiling, or suspended decorative luminaire that uses glass, crystal, ornamental metals, or other decorative material.
Color Rendering Index (CRI) is a measure of the degree of color shift that objects undergo when illuminated by the lighting source as compared with the color of the same objects when illuminated by a reference source of comparable color temperature. CRI is calculated according to CIE 13.3.
Colored light source is a light source designed and marketed as a colored light source and not designed or marketed for general lighting applications with either of the following characteristics maintained throughout all modes of operation including color changing operation:
A Color Rendering Index (CRI) less than 40, as determined according to the method set forth in CIE Publication 13.3; or
A Correlated Color Temperature as measured with ANSI/IES LM-66-20 or ANSI/IES LM-79-19 (as appropriate) and calculated with CIE 15, which does not have a corresponding nominal CCT designation in ANSI C78.377-2017.
Compact Fluorescent Lamp is a fluorescent lamp with a small diameter glass tube (T5 or smaller) that is folded, bent, or bridged to create a long discharge path in a small volume. The lamp designs generally include an amalgam and a cold chamber, or a cold spot, to control the mercury vapor pressure and light output.
Correlated Color Temperature (CCT) is the absolute temperature of a blackbody whose chromaticity most nearly resembles that of the light source.
Countdown Timer Switch turns lighting or other loads ON when activated using one or more selectable countdown time periods and then automatically turns lighting or other loads OFF when the selected time period has elapsed.
Daylight Continuous Dimming Controls are a continuous dimming controls that vary the luminous flux in response to available daylight.
Decorative (Lighting/Luminaires) is lighting or luminaires installed only for aesthetic purposes and that does not serve as display lighting or general lighting. Decorative luminaires are chandeliers, sconces, lanterns, neon or cold cathode, light emitting diodes, theatrical projectors, moving lights, and light color panels, not providing general lighting or task lighting.
Dimmer is a device used to control the intensity of light emitted by a luminaire by controlling the voltage or current available to it.
Dimmer, Continuous means a dimmer that varies the luminous flux of the electric lighting system over a continuous range from the device's maximum light output to the device's minimum light output without visually apparent abrupt changes in light level between the various steps.
Dimmer, Forward Phase Cut, varies the luminous flux of the electric lighting system in which a portion of the alternating current voltage waveform supplying to the light source is removed.
Dimmer, Stepped varies the luminous flux of the electric lighting system in one or more predetermined discrete steps between maximum light output and OFF with changes in light level between adjacent steps being visually apparent.
Display Lighting, Case is lighting that provides a higher level of illuminance to a specific area than the level of surrounding ambient illuminance of small art objects, artifacts, or valuable collections which involves customer inspection of very fine detail from outside of a glass enclosed display case.
Display Lighting, Floor is supplementary lighting that provides a higher level of illuminance to a specific area than the level of surrounding ambient illuminance required to highlight features, such as merchandise on a clothing rack or sculpture or free standing of artwork, which is not displayed against a wall.

Display Lighting, Wall is supplementary lighting that provides a higher level of illuminance to a specific area than the level of surrounding ambient illuminance required to highlight features, such as merchandise on a shelf or wall-mounted artwork, which is displayed on perimeter walls.
Display Lighting, Window is lighting that provides a higher level of illuminance to a specific area than the level of surrounding ambient illuminance of objects such as merchandise, goods, and artifacts, in a show window, to be viewed from the outside of a space through a window.
Driver, when used in relation to solid state lighting, is a device that uses semiconductors to control and supply dc power for LED starting and operation.
Enclosed Luminaires are luminaires which contain enclosed lamp compartments where ventilation openings are less than 3 square inches per lamp in the lamp compartment as defined by UL 1598.
General Lighting is installed electric lighting that provides a uniform level of illumination throughout an area, exclusive of any provision for special visual tasks or decorative effect, exclusive of daylighting, and also known as ambient lighting.
GU-24 is the designation of a lamp holder and socket configuration, based on a coding system by the International Energy Consortium, where “G” indicates the broad type of two or more projecting contacts, such as pins or posts, “U” distinguishes between lamp and holder designs of similar type but that are not interchangeable due to electrical or mechanical requirements, and “24” indicates 24 millimeters center to center spacing of the electrical contact posts.
Illuminance is the area density of the luminous flux incident at a point on a surface.
Illumination is commonly used in a qualitative sense to designate the act of illuminating or the state of being illuminated.
Inseparable Solid State Lighting (SSL) Luminaire is a luminaire featuring solid state lighting components such as LEDs, light engines, and/or driver components which cannot be easily removed or replaced by the end user, thus requiring replacement of the entire luminaire. Removal of solid state lighting components may require the cutting of wires, use of a soldering iron, or damage to or destruction of the luminaire. If solid state lighting components are not removable without destruction to the luminaire, the luminaire is deemed inseparable.
Institutional Tuning is the process of adjusting the maximum light output of lighting systems to support visual needs or save energy. Institutional tuning differs from personal tuning in that the control strategy is implemented at the institutional rather than the individual user level, and maximum light level adjustments are available only to authorized personnel.
Integrated LED lamp is an integrated assembly composed of light emitting diode (LED) packages (components) or LED arrays (modules), as well as an LED driver, an ANSI standard base, and other optical, thermal, mechanical and electrical components. The device is intended to connect directly to the branch circuit through a corresponding ANSI standard lamp-holder (socket). (ANSI/IES LS-1-20).
Lamp is an electrical appliance that produces optical radiation for the purpose of visual illumination, designed with a base to provide an electrical connection between the lamp and a luminaire, and designed to be installed into a luminaire. A lamp is not a luminaire and is not an LED retrofit kit.
Landscape Lighting is a type of outdoor lighting that is recessed into or mounted on the ground, paving, or raised deck, which is mounted less than 42 inches above grade or mounted onto trees or trellises, and that is intended to be aimed only at landscape features.
Lantern is an outdoor luminaire that uses an electric lamp to replicate the appearance of a pre-electric lantern, which used a flame to generate light.
LED Driver is a device composed of a power source and light emitting diode (LED) control circuitry designed to operate an LED package (component), an LED array (module), or an LED lamp. LED Driver is a power source that adjusts the voltage or current to LEDs, ranging in complexity from a resistor to a constant voltage or constant current power supply. LED Driver is also known and referred to as Lamp Control Gear.
LED Light Engine is an integrated assembly composed of light emitting diode (LED) packages (components) or LED arrays (modules), as well as an LED driver, and other optical, thermal, mechanical and electrical components. The device is intended to connect directly to the branch circuit through a custom connector compatible with the LED luminaire for which it was designed. It does not use an ANSI standard base.

LED Retrofit Kit is a solid state lighting product intended to replace existing light sources and systems, including incandescent and fluorescent light sources, in previously installed luminaires that already comply with safety standards. These kits replace the existing light source and related electrical components, and are classified or certified to UL 1598C. They may employ an ANSI standard lamp base, either integral or connected to the retrofit by wire leads. LED retrofit kit does not include self-ballasted lamps.
Light is a form of radiant energy that is capable of exciting the retina and producing a visual sensation. The visible portion of the electromagnetic spectrum extends from about 380 to about 770 nanometers.
Lighting, or illumination, is commonly used in a qualitative or general sense to designate the act of illuminating or the state of being illuminated.
Lighting Control, Self-Contained is a unitary lighting control module that requires no additional components to be a fully functional lighting control.
Lighting Control System requires two or more components to be installed in the building to provide all of the functionality required to make up a fully functional and compliant lighting control.
Light Emitting Diode (LED) is a p-n junction semiconductor device that emits incoherent optical radiation when forward- biased. The optical emission may be in the ultraviolet, visible, or infrared wavelength regions.
Line-Voltage Track Lighting is equipped with luminaires that, use line-voltage lamps or that are equipped with integral transformers at each luminaire.
Low Voltage is less than 90 volts.
Low-Voltage Track Lighting is equipped with remote transformers for use with low-voltage equipment along the entire length of track.
Luminaire is a complete lighting unit consisting of a light source such as a lamp or lamps, together with the parts that distribute the light, to position and protect the light source, and to connect the light source to the power supply.
Luminaire Alteration is adding luminaires, removing and reinstalling luminaires, or combined replacement of lamps and ballasts or drivers. Luminaire alterations do not include repairs, such as replacing lamps only, ballasts or drivers only, diffusers, shades, or luminaire covers.
Luminance is the luminous intensity of the source or surface divided by the area of the source or surface seen by the observer.
Luminous Efficacy is a measure of the luminous efficiency of a light source. It is the quotient of the total luminous flux emitted by the total light source power input, expressed in lm/W.
Luminous Flux is the time rate of flow of radiant energy, evaluated in terms of a standardized visual response..
Luminous Maintenance (often referred to as “lumen flux maintenance” or “lumen maintenance”) is the remaining luminous flux output, typically expressed as a percentage of initial luminous flux output, at any selected elapsed operating time. Luminous maintenance is the converse of luminous flux depreciation (or “lumen depreciation”).
Marquee Lighting is a permanent lighting system consisting of one or more rows of many small lamps, including light emitting diodes (LEDs) lamps, tungsten lamps, low pressure discharge lamps or fiber optic lighting, attached to a canopy.
Multilevel Astronomical Time Switch is an Astronomical Time Switch Control that reduces lighting power in multiple steps.
Multilevel Lighting Control reduces power going to a lighting system in multiple steps.
Multiscene Programmable Control allows for two or more predefined lighting settings, in addition to all-OFF, for two or more groups of luminaires to suit multiple activities in the space.
Narrow Band Spectrum is a limited range of wavelengths (nm) concentric to a dominant peak wavelength in the visible spectrum. The limited range of wavelength shall be within 20 nm on either side of the peak wavelength at 50 percent of the peak wavelength’s relative spectral power, and within 75 nm on either side of the peak wavelength at 10 percent of the peak wavelength’s relative spectral power.

NEMA LSD 57 is the National Electrical Manufacturers Association document titled “Polyurethane Foam Application: Lighting Equipment,” 2018 (NEMA LSD 57-2018).
NEMA SSL 7A is the National Electrical Manufacturers Association document titled “Phase Cut Dimming for Solid State Lighting: Basic Compatibility,” 2015 (NEMA SSL 7A-2015).
Non-integrated LED lamp is an assembly composed of a light emitting diode (LED) array (module) or LED packages (components), and an ANSI standard base. The device is intended to connect to the LED driver of an LED luminaire through an ANSI standard lamp-holder (socket). The device cannot be connected directly to the branch circuit. (ANSI/IES LS-1-20).
Occupant Sensing Controls automatically control levels of illumination, allow for manual operation, and consist of the following types:
Motion Sensing Control is used outdoors, automatically reduces lighting power or turns lights OFF after an area is vacated of occupants, and automatically turns the lights ON when the area is occupied.
Occupant Sensing Control is used indoors, automatically reduces lighting power or turns lights OFF after an area is vacated of occupants and is capable of automatically turning the lighting load ON when an area is occupied.
Partial-ON Occupant or Motion Sensing Control automatically turns lights OFF after an area is vacated of occupants and is capable of automatically or manually turning ON part of the lighting load when an area is occupied.
Partial-OFF Occupant or Motion Sensing Control automatically dims the lighting or turns OFF part of the lighting load after an area is vacated of occupants, and is capable of automatically turning ON the lighting load or restoring it to full when an area is occupied.
Vacancy Sensing Control automatically turns lights OFF after an area is vacated of occupants but requires lights to be turned ON manually.
One-to-One Alteration is either replacement of whole luminaires one for one, in which the only electrical modification involves disconnecting the existing luminaire and reconnecting the replacement luminaire, or when components of a luminaire are modified without replacing the entire luminaire.
Ornamental (Lighting/Luminaires) is lighting or luminaires installed outdoor which are rated for 50 watts or less that are post-top luminaires, lanterns, pendant luminaires, chandeliers, and marquee lighting, not providing general lighting or task lighting.
Pendant Luminaire (Suspended Luminaire) is a luminaire that is hung from a ceiling by supports.
Permanently Installed lighting consists of luminaires that are affixed to land, within the meaning of Civil Code Sections 658 and 660, except as provided below. Permanently installed luminaires may be mounted inside or outside of a building or site. Permanently installed luminaires may have either plug-in or hardwired connections for electric power. Examples include track and flexible lighting systems; lighting attached to walls, ceilings, columns, inside or outside of permanently installed cabinets, internally illuminated cabinets, mounted on poles, in trees, or in the ground; attached to ceiling fans and integral to exhaust fans. Permanently installed lighting does not include portable lighting or lighting that is installed by the manufacturer in exhaust hoods for cooking equipment, refrigerated cases, food preparation equipment, and scientific and industrial equipment.
Photo Control automatically turns lights ON and OFF, or automatically adjusts lighting levels, in response to the amount of daylight that is available. A Photo Control may also be one component of a field assembled lighting system, the component having the capability to provide a signal proportional to the amount of daylight to a Lighting Control System to dim or brighten the electric lights in response.
Portable Lighting is lighting equipment designed for manual portability, with plug-in connections for electric power, that is: table and freestanding floor lamps; attached to modular furniture; workstation task luminaires; luminaires attached to workstation panels; attached to movable displays; or attached to other personal property.
Post Top Luminaire is an outdoor luminaire that is mounted directly on top of a lamp-post.
Precision Lighting is task lighting for commercial or industrial work that illuminates low contrast, finely detailed, or fast moving objects.

Radiant Energy is energy travelling in the form of electromagnetic waves. It is measured in units of energy such as joules or kilowatt hours.
Radiant Power is the time rate of flow of radiant energy. It is expressed preferably in watts.
Recessed Luminaire is a luminaire that is mounted in the ceiling or behind a wall or other surface with the opening of the luminaire flush with the surface.
Sconce is a wall mounted decorative accent luminaire.
Security Cameras are any operational camera used to enhance the safety and security within a general hardscape area.
Shut-off Controls is any lighting control capable of automatically shutting OFF the lighting in a space when the space is typically unoccupied.
Solid State Lighting (SSL) is a family of light sources that includes: semiconductor light emitting diodes (LEDs); and organic light emitting diodes (OLEDs).
Source (light) is the general term used to reference a source of light. It can refer variously to an electric lamp, a light emitting diode (LED), an entire luminaire with lamp and optical control, or fenestration for daylighting.
Special Effects Lighting is lighting installed to give off luminance instead of providing illuminance, which does not serve as general, task, or display lighting.
Task Lighting is lighting directed to a specific surface or area, providing illumination for visual tasks. Task lighting is not general lighting.
Temporary Lighting is a lighting installation, with plug-in connections, that does not persist beyond 60 consecutive days or more than 120 days per year.
Track Lighting is a lighting equipment system consisting of an electrified power channel (track) and removable luminaires (lamp holders; track heads) that can be mechanically attached anywhere along the power channel. The luminaires can be repositioned and re-aimed as desired. Track lighting includes the following types:
Track Lighting Integral Current Limiter consists of a current limiter integral to the end-feed housing of a manufactured line- voltage track lighting system.
Track Lighting Supplementary Overcurrent Protection Panel is a panelboard containing Supplementary Overcurrent Protection Devices as defined in Article 100 of the California Electrical Code, and used only with line voltage track lighting.
Track Mounted Luminaires are luminaires designed to be attached at any point along a track lighting system. Track mounted luminaires may be line-voltage or low-voltage.
Tunable Lighting are light sources with the ability to alter their luminous flux and/or spectral power distribution. Tunable lighting includes the following types:
Color tunable light source is capable of emitting highly saturated light of varying hues, as well as white light, for example by varying the relative intensity of individual emitters within the light source.
Dim-to-warm (also known as warm dim) light source is capable of simultaneously decreasing its correlated color temperature as its light output decreases, typically resembling the change in color temperature of an incandescent lamp as it dims.
Tunable white light source is capable of adjusting its correlated color temperature while maintaining its relative light output and capable of adjusting its light output while maintaining its correlated color temperature.
LISTED is in accordance with Article 100 of the California Electrical Code.
LOW-GWP REFRIGERANT is a compound used as a heat transfer fluid or gas that is: (A) any compound or blend of compounds, with a GWP Value less than 150; and (B) U.S. EPA Significant New Alternatives Policy (SNAP)-approved; and
(C) not an ozone depleting substance as defined in Title 40 of the Code of Federal Regulations, Part 82, §82.3 (as amended March 10, 2017).
LOW-RISE RESIDENTIAL BUILDING is a building, other than a hotel/motel, that is Occupancy Group:

R-2, multifamily, with three habitable stories or less; or R-3, single-family; or
U-building, located on a residential site.
LPG is liquefied petroleum gas.
MANUAL is capable of being operated by personal intervention.
MANUFACTURED DEVICE is any heating, cooling, ventilation, lighting, water heating, refrigeration, cooking, plumbing fitting, insulation, door, fenestration product, or any other appliance, device, equipment, or system subject to Sections
110.0 through 110.9 of Part 6.
MECHANICAL COOLING is lowering the temperature within a space using refrigerant compressors or absorbers, desiccant dehumidifiers, or other systems that require energy to directly condition the space. Systems that are solely energy recovery ventilation (ERV) or heat recovery ventilation (HRV) are not considered mechanical cooling. In nonresidential, multifamily buildings, and hotel/motel buildings, cooling of a space by direct or indirect evaporation of water alone is not considered mechanical cooling.
MECHANICAL HEATING is raising the temperature within a space using electric resistance heaters, fossil fuel burners, heat pumps, or other systems that require energy to directly condition the space. Systems that only use solar energy or heat recovery as the heat source are not mechanical heating systems.
MERV is the minimum efficiency reporting value as determined by ASHRAE Standard 52.2 Method of Testing General Ventilation Air-Cleaning Devices for Removal Efficiency by Particle Size.
METAL BUILDING is a complete integrated set of mutually dependent components and assemblies that form a building, which consists of a steel-framed superstructure and metal skin. This does not include structural glass or metal panels such as in a curtainwall system.
MICROCHANNEL CONDENSER is an air-cooled condenser for refrigeration systems which utilizes multiple small parallel gas flow passages in a flat configuration with fin surfaces bonded between the parallel gas passages.
MINISPLIT AIR CONDITIONERS AND HEAT PUMPS are air conditioner or heat pump systems that have a single outdoor section and one or more indoor sections. The indoor sections cycle on and off in unison in response to a single indoor thermostat.
MODELING ASSUMPTIONS are the conditions (such as weather conditions, thermostat settings and schedules, internal gain schedules, etc.) that are used for calculating a building's annual energy consumption as specified in the Alternative Calculation Methods (ACM) Approval Manuals.
MULTIFAMILY BUILDING is any of the following:
A building of Occupancy Group R-2, other than a hotel/motel building or timeshare property,
A building of Occupancy Group R-3 that is a nontransient congregate residence, other than boarding houses of more than 6 guests and alcohol or drug abuse recovery homes of more than 6 guests, or
A building of Occupancy Group R-4.
MULTIPLE-SPLIT AIR CONDITIONERS AND HEAT PUMPS are air conditioner or heat pump systems that have two or more indoor sections. The indoor sections operate independently and can be used to condition multiple zones in response to multiple indoor thermostats.
MULTIPLE ZONE SYSTEM is an air distribution system that supplies air to more than one space conditioning zone, each of which has one or more devices (such as dampers, cooling coils, and heating coils) that regulate airflow, cooling, or heating capacity to the zone.
NATURAL GAS AVAILABILITY. For newly constructed buildings, natural gas is available if a gas service line can be connected to the site without a gas main extension. For addition and alteration, natural gas is available if a gas service line is connected to the existing building.
NEEA is the Northwest Energy Efficiency Alliance.

NEEA ADVANCED WATER HEATER SPECIFICATION is the Northwest Energy Efficiency Alliance (NEEA) specification version 7.0 for heat pump water heaters.
NET EXHAUST FLOW RATE is the exhaust flow rate for a hood, minus any internal discharge makeup airflow rate.
NET SENSIBLE COEFFICIENT OF PERFORMANCE (COP) is defined by AHRI 1360 and includes all indoor unit power and air- cooled condenser/condensing unit power for air-cooled units and includes all indoor unit power and the power allowance for pump and heat rejection as described in the Heat Rejection/Cooling Fluid Standard Rating Conditions table of AHRI 1360 for water, glycol, and chilled water units.
NEWLY CONDITIONED SPACE is any space being converted from unconditioned to directly conditioned or indirectly conditioned space. Newly conditioned space must comply with the requirements for an addition. See Section 141.0 for nonresidential occupancies and Section 150.2 for residential occupancies.
NEWLY CONSTRUCTED BUILDING is a building that has never been used or occupied for any purpose.
NONDUCTED SYSTEM is an air conditioner or heat pump that is permanently installed; directly heats or cools air within the conditioned space; and uses one or more indoor coils that are mounted on walls or ceilings within the conditioned space. The system may be of a modular design that allows for combining multiple outdoor coils and compressors to create one unified system.
NONRESIDENTIAL BUILDING is any building which is identified in the California Building Code Table; Description of Occupancy as Group A, B, E, F, H, I, M, or S, and is a U; as defined by Part 2 of Title 24 of the California Code or Regulation.
NOTE: Requirements for high-rise residential buildings and hotels/motels are included in the nonresidential sections of Part 6.
NONRESIDENTIAL BUILDING OCCUPANCY TYPES are building types in which a minimum of 90 percent of the building floor area functions as one of the following, which do not qualify as any other Building Occupancy Types more specifically defined in Section 100.1, and which do not have a combined total of more than 10 percent of the area functioning of any Nonresidential Function Areas specifically defined in Section 100.1:
Assembly Building is a building with meeting halls in which people gather for civic, social, or recreational activities. These include civic centers, convention centers and auditoriums.
Commercial and Industrial Storage Building is a building with building floor areas used for storing items.
Financial Institution Building is a building with floor areas used by an institution which collects funds from the public and places them in financial assets, such as deposits, loans, and bonds.
Grocery Store Building is a building with building floor areas used for the display and sale of food.
Gymnasium Building is a building with building floor areas used for physical exercises and recreational sport events and activities.
Industrial/Manufacturing Facility Building is a building with building floor areas used for performing a craft, assembly or manufacturing operation.
Library Building is a building with building floor area used for repository of literary materials, and for reading reference such as books, periodicals, newspapers, pamphlets and prints.
Motion Picture Theater Building is a building with building floor areas used for showing motion pictures to audiences.
Museum Building is a building with building floor areas in which objects of historical, scientific, artistic or cultural interests are curated, treated, preserved, exhibited and stored.
Office Building is a building of CBC Group B Occupancy with building floor areas in which business, clerical or professional activities are conducted.
Parking Garage Building is a building with building floor areas used for parking vehicles, and consists of at least a roof over the parking area enclosed with walls on all sides. The building includes areas for vehicle maneuvering to

reach designated parking spaces. If the roof of a parking structure is also used for parking, the section without an overhead roof is considered an outdoor parking lot instead of a parking garage.
Performance Arts Theater Building is a building with building floor areas used for showing performing arts that include plays, music, or dance to audiences.
Religious Facility Building is a building with building floor areas used for assembly of people to worship.
Restaurant Building is a building with building floor areas in which food and drink are prepared and served to customers in return for money.
Retail Store Building is a building with building floor areas used for the display and sale of merchandise except food.
School Building is a building used by an educational institution. The building floor area can include classrooms or educational laboratories, and may include an auditorium, gymnasium, kitchen, library, multipurpose room, cafeteria, student union, or workroom. A maintenance or storage building is not a school building.
Sports Arena Building is a building with building floor areas used for public viewing of sporting events and activities. Sports arenas are classified according to the number of spectators they are able to accommodate, as follows:
Class I Facility is used for competition play for 5,000 or more spectators. Class II Facility is used for competition play for up to 5,000 spectators. Class III Facility is used for competition play for up to 2,000 spectators.
Class IV Facility is normally used for recreational play and there is limited or no provision for spectators.
NONRESIDENTIAL COMPLIANCE MANUAL is the manual developed by the Commission, under Section 25402.1(e) of the Public Resources Code, to aid designers, builders, and contractors in meeting the energy efficiency requirements for nonresidential, high-rise residential, and hotel/motel buildings.
NONRESIDENTIAL FUNCTION AREAS are those areas, rooms, and spaces within Nonresidential Buildings that fall within the following particular definitions, and are defined according to the most specific definition:
Aisle Way is the passage or walkway between storage racks permanently anchored to the floor in a Commercial or Industrial Storage Building, where the racks are used to store materials such as goods and merchandise.
Atrium is a large-volume indoor space created by openings between two or more stories but is not used for an enclosed stairway, elevator hoistway, escalator opening, or utility shaft for plumbing, electrical, air-conditioning or other equipment.
Audience Seating Area is a room or area with fixed seats for public meetings or gatherings.
Auditorium Area is a room or area with a stage and fixed seats used for public meetings or gatherings.
Auto Repair / Maintenance Area is an area used to repair or maintain automotive equipment and/or vehicles.
Barber, Beauty Salon, Spa Area is a room or area in which the primary activity is manicures, pedicures, facials, or the cutting or styling of hair.
Civic Meeting Place Area is a space in a government building designed or used for public debate, discussion, or public meetings of governmental bodies.
Classroom, Lecture, Training, Vocational Area is a room or area where an audience or class receives instruction.
Commercial and Industrial Storage Area (refrigerated) is a room or area used for storing items where mechanical refrigeration is used to maintain the space temperature at 55° F or less.
Convention, Conference, Multipurpose and Meeting Area are rooms or areas that are designed or used for meetings, conventions or events, and that have neither fixed seating nor fixed staging.
Copy Room is a room or area used for copying, scanning, or binding documents. Corridor Area is a passageway or route into which compartments or rooms open. Dining Areas include the following:

Bar/Lounge is a room or area where wait staff serve patrons with liquor, cocktails, wine and beer in a relaxed atmosphere, usually with tables and chairs.
Cafeteria/Fast Food is a room or area where customers pick up their food at a counter and there is little or no wait staff or table service.
Family Dining is a room or area where wait staff serve patrons with meals in a causal atmosphere.
Fine Dining is a room or area where wait staff serve patrons with meals in an elegant and formal atmosphere.
Electrical/Mechanical/Telephone Room is a room in which the building's electrical switchbox or control panels, telephone switchbox, and/or HVAC controls or equipment is located.
Exercise/Fitness Center and Gymnasium Area is a room or area equipped for gymnastics, exercise equipment, or indoor athletic activities.
Financial Transaction Area is a room or area used by an institution that collects funds from the public and places them in financial assets such as deposits, loans and bonds, and includes tellers, work stations, and customers' waiting areas; to complete financial transactions. Financial transaction areas do not include private offices, hallways, restrooms, or other support areas.
Healthcare Facilities may have a room or area as follows:
Exam/Treatment Room is a room or area that does not provide overnight patient care and that is used to provide physical and mental care through medical, dental, or psychological examination and treatment, including laboratories and treatment spaces.
Imaging Room is a diagnostic room and area for application and review of results from imaging technologies including x-ray, ultrasound, computerized tomography (CT), and magnetic resonance imaging (MRI).
Medical Supply Room is a room or area used for storing medical supplies.
Nursery is a room or area for providing medical care for newly born infants.
Nurse’s Station is a room or area where health care staff work when not directly interacting with patients.
Operating Room is a room or area where surgical operations are carried out in a sterile environment. This category also applies to veterinary operating rooms.
Patient Room is a room or area that is occupied by one or more patients during a stay in a healthcare facility or hospital.
Physical Therapy Room is a room or area for providing physical therapy treatment.
Recovery Room is a room or area that is equipped with apparatus for meeting postoperative emergencies and in which surgical patients are kept during the immediate postoperative period for care and recovery from anesthesia.
Hotel Function Area is a hotel room or area such as a hotel ballroom, meeting room, exhibit hall or conference room, together with prefunction areas and other spaces ancillary to its function.
Kitchen/Food Preparation Area is a room or area with cooking facilities or where food is prepared.
Laboratory, Scientific Area is a room or area where research, experiments, and measurement in medical and physical sciences are performed requiring examination of fine details. The area may include workbenches, countertops, scientific instruments, and associated floor spaces. Scientific laboratory does not refer to film, computer, and other laboratories where scientific experiments are not performed.
Laundry Area is a room or area primarily designed or used for laundering activities.
Library Area is a room or area primarily designed or used as a repository for literary materials, such as books, periodicals, newspapers, pamphlets and prints, kept for reading or reference.
Reading Area is a room or area in a library containing tables, chairs, or desks for patrons to use for the purpose of reading books and other reference documents. Library reading areas include reading, circulation, and

checkout areas. Reading areas do not include private offices, meeting, photocopy, or other rooms not used specifically for reading by library patrons.
Stack Area is a room or area in a library with grouping of shelving sections. Stack aisles include pedestrian paths located in stack areas.
Lobby, Main Entry is the contiguous area in buildings including hotel/motel that is directly located by the main entrance of the building through which persons must pass, including any ancillary reception, waiting and seating areas.
Locker Room is a room or area for changing clothing, sometimes equipped with lockers.
Lounge/Breakroom or Waiting Area is a room or area in which people sit, wait and relax.
Mall is a roofed or covered common pedestrian area within a mall building that serves as access for two or more tenants.
Manufacturing, Commercial and Industrial Work Area is a room or area in which an art, craft, assembly or manufacturing operation is performed. Lighting installed in these areas is classified as follows:
High bay: Where the luminaires are 25 feet or more above the floor.
Low bay: Where the luminaires are less than 25 feet above the floor.
Precision: Where visual tasks of small size or fine detail such as electronics assembly, fine woodworking, metal lathe operation, fine hand painting and finishing, egg processing operations, or tasks of similar visual difficulty are performed.
Multipurpose Room is a room that can be used for multipurpose activities such as meetings, instructional activities and social gatherings. Multipurpose rooms are typically found in offices, schools, convention centers, and assisted living facilities.
Museum Areas include the following:
Exhibit/Display is a room or area in a museum that has for its primary purpose exhibitions, having neither fixed seating nor fixed staging. An exhibit does not include a gallery or other place where art is for sale. An exhibit does not include a lobby, conference room, or other occupancies where the primary function is not exhibitions.
Restoration Room is a room or area in which the primary function is the care of works of artistic, historical, or scientific value. A restoration does not include a gallery or other place where art is for sale. A restoration does not include a lobby, conference room, or other occupancies where the primary function is not the care or exhibit of works of artistic, historical, or scientific value.
Office Area is a room or area in a building of CBC Group B Occupancy in which business, clerical or professional activities are conducted.
Parking Garage Areas include the following:
Daylight Adaptation Zone in a Parking Garage is the interior path of travel for vehicles adjacent to the entrance or exit of a parking garage as needed for visual adaptation to transition from exterior daylight levels to interior light levels. Daylight Adaptation Zones only include the path of vehicular travel and do not include adjacent Parking Areas.
Parking Zone and Ramps in a Parking Garage is used for the purpose of parking and maneuvering of vehicles. Parking areas include sloping floors of a parking garage. Ramps and driveways specifically for the purpose of moving vehicles between floors of a parking garage. Parking areas and ramps do not include Daylight Adaptation Zones or the roof of a Parking Garage, which may be present in a Parking Garage.
Pharmacy Area is a room or area where medicinal drugs are dispensed and sold, usually in a retail store.
Playing Area for Sports Arena is an area where sports are played in front an audience.

Religious Worship Area is a room or area in which the primary function is for an assembly of people to worship. Religious worship does not include classrooms, offices, or other areas in which the primary function is not for an assembly of people to worship.
Restroom is a room providing personal facilities such as toilets and washbasins.
Retail Sales Areas include the following:
Fitting Room is a room or area where the retail customers try out clothing before purchasing.
Grocery Sales is a room or area that has as its primary purpose the sale of foodstuffs requiring additional preparation prior to consumption.
Retail Merchandise Sales is a room or area in which the primary activity is the sale of merchandise.
Server Room is a room smaller than 500 square feet, within a larger building, in which networking equipment and Information Technology (IT) server equipment is housed, and a minimum of five IT servers are installed in frame racks.
Server Aisle is an aisle of racks of Information Technology (IT) server equipment in a Server Room. While networking equipment may also be housed on these racks, it is largely a room to manage server equipment.
Stairs is a series of steps providing passage for persons from one level of a building to another, including escalators.
Stairwell is a vertical shaft in which stairs are located.
Storage, Commercial and Industrial Area includes the following:
Warehouse is a room or areas used for storing of items such as goods, merchandise and materials.
Shipping & Handling is a room or areas used for packing, wrapping, labeling and shipping out goods, merchandise and materials.
Support Area is a room or area used as a passageway, utility room, storage space, or other type of space associated with or secondary to the function of an occupancy that is listed in these regulations.
Tenant Lease Area is a room or area in a building intended for lease for which a specific tenant is not identified at the time of building permit application.
Theater Areas include the following:
Motion Picture Theater is an assembly room or area with rows of seats for the showing of motion pictures.
Performance Theater is an assembly room or area with rows of seats for the viewing of dramatic performances, lectures, musical events and similar live performances.
Transportation Function Areas include the following:
Baggage Area is a room or area in a transportation facility such as an airport where the travelers reclaim their baggage.
Ticketing Area is a room or area in a transportation facility such as an airport or a train station where travelers purchase tickets, check in baggage, or inquire about travel information.
Videoconferencing Studio is a room or area with permanently installed videoconferencing cameras, audio equipment, and playback equipment for both audio-based and video-based two-way communication between local and remote sites.
NONSTANDARD PART LOAD VALUE (NPLV) is a single- number part-load efficiency figure of merit for chillers referenced to conditions other than IPLV conditions. (See "integrated part load value.")
NORTH-FACING (See "orientation.")
OCCUPANCY is the purpose for which a building or part thereof is used or intended to be used.
OCCUPANCY, HUMAN is any occupancy that is intended primarily for human activities.

OCCUPANCY GROUP is a classification of occupancy defined in Chapter 3 of the CBC (Title 24, Part 2).
OCCUPANCY TYPE is a description of occupancy that is more specific than occupancy group and that relates to determining the amount of lighting, ventilation, or other services needed for that portion of the building.
OCCUPIABLE SPACE is any enclosed space that is intended for human occupancy, including all habitable spaces as well as bathrooms, toilets, closets, halls, storage and utility areas, laundry areas, and similar areas. (See also “habitable space”.)
OCCUPIED STANDBY MODE is when a zone is scheduled to be occupied and an occupant sensor indicates zero population within the zone.
ONLINE CAPACITY is the total combined capacity in actual cubic feet per minute of compressed air at a given pressure from all online compressors.
ONLINE COMPRESSORS are all the compressors that are physically connected to compressed air piping and are available to serve peak load. Online compressors do not include back up compressors whose only purpose is to be available when an online compressor fails.
OPEN COOLING TOWER, or OPEN-CIRCUIT COOLING TOWER is an open, or direct contact, cooling tower which exposes water directly to the cooling atmosphere, thereby transferring the source heat load from the water directly to the air by a combination of heat and mass transfer.
OPENADR 2.0a is the OpenADR Alliance document titled, “OpenADR 2.0 Profile Specification A Profile,” 2011. OPENADR 2.0b is the OpenADR Alliance document titled, “OpenADR 2.0 Profile Specification B Profile,” 2015. OPERABLE FENESTRATION is designed to be opened or closed.
OPTIMUM START CONTROLS are controls that are designed to automatically adjust the start time of a space conditioning system each day with the intent of bringing the space to desired occupied temperature levels at the beginning of scheduled occupancy.
OPTIMUM STOP CONTROLS are controls that are designed to setup or setback thermostat setpoints before scheduled unoccupied periods based upon the thermal lag and acceptable drift in space temperature that is within comfort limits.
OSHPD is the California Office of Statewide Health Planning and Development
ORIENTATION, CARDINAL is one of the four principal directional indicators, north, east, south, and west, which are marked on a compass, also called cardinal directions.
ORIENTATION, EAST-FACING is oriented to within 45° of true east, including 45°00'00" south of east (SE), but excluding 45°00'00" north of east (NE).
ORIENTATION, NORTH-FACING is oriented to within 45° of true north, including 45°00'00" east of north (NE), but excluding 45°00'00" west of north (NW).
ORIENTATION, SOUTH-FACING is oriented to within 45° of true south including 45°00'00" west of south (SW), but excluding 45°00'00" east of south (SE).
ORIENTATION, WEST-FACING is oriented to within 45° of true west, including 45°00'00" north of due west (NW), but excluding 45°00'00" south of west (SW).
OUTDOOR AIR (Outside air) is air taken from outdoors and not previously circulated in the building.
OUTDOOR AREAS are areas external to a building. These include but are not limited to the following areas:
Building entrance way is the external area of any operable doorway in or out of a building, including overhead doors. These areas serve any doorway, set of doors (including elevator doors such as in parking garages), turnstile, vestibule, or other form of portal that is ordinarily used to gain access to the building by its users and occupants. Where buildings have separate one-way doors to enter and to leave, this also includes any area serving any doors ordinarily used to leave the building.
Building façade is the exterior surfaces of a building, not including horizontal roofing, signs, and surfaces not visible from any public accessible viewing location.

Canopy is a permanent structure, other than a parking garage area, consisting of a roof and supporting building elements, with the area beneath at least partially open to the elements. A canopy may be freestanding or attached to surrounding structures. A canopy roof may serve as the floor of a structure above.
Carport is a covered, open-sided structure designed or used primarily for the purpose of parking vehicles, having a roof over the parking area. Typically, carports are free-standing or projected from the side of the building and are only two or fewer car lengths deep. A Carport is not a Garage.
Hardscape is the area of an improvement to a site that is paved or has other structural features such as curbs, plazas, entries, parking lots, site roadways, driveways, walkways, sidewalks, bikeways, water features and pools, storage or service yards, loading docks, amphitheaters, outdoor sales lots, and private monuments and statuary.
Outdoor Sales canopy is a canopy specifically to cover and protect an outdoor sales area.
Outdoor sales frontage is the portion of the perimeter of an outdoor sales area immediately adjacent to a public street, road, or sidewalk.
Outdoor sales lot is an uncovered paved area used exclusively for the display of vehicles, equipment or other merchandise for sale. All internal and adjacent access drives, walkway areas, employee and customer parking areas, vehicle service or storage areas are not outdoor sales lot areas, but are considered hardscape.
Parking lot is an uncovered area for the purpose of parking vehicles. Parking lot is a type of hardscape.
Paved area is an area that is paved with concrete, asphalt, stone, brick, gravel, or other improved wearing surface, including the curb.
Principal viewing location is anywhere along the adjacent highway, street, road or sidewalk running parallel to an outdoor sales frontage.
Public monuments are statuary, buildings, structures, and/or hardscape on public land.
Stairways and Ramps. Stairways are one or more flights of stairs with the necessary landings and platforms connecting them to form a continuous and uninterrupted passage from one level to another. An exterior stairway is open on at least one side, except for required structural columns, beams, handrails and guards. The adjoining open areas shall be either yards, courts or public ways. The other sides of the exterior stairway need not be open. Ramps are walking surfaces with a slope steeper than 5 percent.
Vehicle service station is a gasoline, natural gas, diesel, or other fuel dispensing station.
OUTDOOR LIGHTING is electrical lighting used to illuminate outdoor areas.
OUTDOOR LIGHTING ZONE is a geographic area designated by the California Energy Commission in accordance with Part 1, Section 10-114, that determines requirements for outdoor lighting, including lighting power densities and specific control, equipment or performance requirements. Lighting zones are numbered LZ0, LZ1, LZ2, LZ3 and LZ4.
OVERHANG is a contiguous opaque surface, oriented horizontally and projecting outward horizontally from an exterior vertical surface.
PART 1 means Part 1 of Title 24 of the California Code of Regulations.
PART 6 means Part 6 of Title 24 of the California Code of Regulations.
PART-LOAD OPERATION occurs when a system or device is operating below its maximum rated capacity.
PARTICLE SIZE EFFICIENCY is the fraction (percentage) of particles that are captured on air filter equipment as determined during rating tests conducted in accordance with ASHRAE Standard 52.2 or AHRI Standard 680. Particle Size Efficiency is measured in three particle size ranges: 0.3-1.0, 1.0-3.0, 3.0-10 microns.
PHOTOSYNTHETIC PHOTON EFFICACY (PPE) is photosynthetic photon flux divided by input electric power in units of micromoles per second per watt, or micromoles per joule as defined by ANSI/ASABE S640.
PHOTOSYNTHETIC PHOTON FLUX (PPF) is the rate of flow of photons between 400 to 700 nanometers in wavelength from a radiation source as defined by ANSI/ASABE S640.

POOLS, ANSI/APSP/ICC-5 is the American National Standards Institute and National Spa and Pool Institute document titled “American National Standard for Residential Inground Swimming Pools” 2011 (ANSI/ APSP/ICC 5 2011) with Addenda A.
POOLS, AUXILIARY POOL LOADS are features or devices that circulate pool water in addition to that required for pool filtration, including, but not limited to, solar pool heating systems, filter backwashing, pool cleaners, waterfalls, fountains, and spas.
POOLS, BACKWASH VALVE is a diverter valve designed to backwash filters located between the circulation pump and the filter, including, but not limited to, slide, push-pull, multiport, and full-flow valves.
POOLS, MULTISPEED PUMP is a pump capable of operating at two or more speeds and includes two-speed and variable- speed pumps.
POOLS, NSF/ANSI/CAN 50 is the NSF International (formerly National Sanitation Foundation) Standard and American National Standards Institute document titled “Equipment and Chemicals for Swimming Pools, Spas, Hot Tubs, and Other Recreational Water Facilities” 2020 (NSF/ANSI/CAN 50 – 2020).
POOLS, RESIDENTIAL are permanently installed residential in-ground swimming pools intended for use by a single-family home for noncommercial purposes and with dimensions as defined in ANSI/NSPI-5.
PRESSURE BOUNDARY is the primary air enclosure boundary separating indoor and outdoor air. For example, a volume that has more leakage to the outside than to the conditioned space would be considered outside the pressure boundary. Exposed earth in a crawlspace or basement shall not be considered part of the pressure boundary.
PRIMARY AIRFLOW is the airflow (cfm or L/s) supplied to the zone from the air-handling unit at which the outdoor air intake is located. It includes outdoor intake air and recirculated air from that air-handling unit but does not include air transferred or air recirculated to the zone by other means.
PRIMARY STORAGE is compressed air storage located upstream of the distribution system and any pressure flow regulators.
PROCESS is an activity or treatment that is not related to the space conditioning, lighting, service water heating, or ventilating of a building as it relates to human occupancy.
PROCESS BOILER is a type of boiler with a capacity (rated maximum input) of 300,000 Btus per hour (Btu/h) or more that serves a process.
PROCESS, COVERED is a process that is regulated under Part 6, Sections 120.6 and 140.9, which includes computer rooms, data centers, elevators, escalators and moving walkways, laboratories, enclosed parking garages, commercial kitchens, refrigerated warehouses, commercial refrigeration, compressed air systems, process boilers, and controlled environment horticultural spaces.
PROCESS, EXEMPT is a process that is not a covered process regulated under Part 6.
PROCESS LOAD is an energy load resulting from a process.
PROCESS SPACE is a nonresidential space that is designed to be thermostatically controlled to maintain a process environment temperature less than 55° F or to maintain a process environment temperature greater than 90° F for the whole space that the system serves, or that is a space with a space-conditioning system designed and controlled to be incapable of operating at temperatures above 55° F or incapable of operating at temperatures below 90° F at design conditions.
PROPOSED DESIGN BUILDING is a building that is simulated by Commission-approved compliance software to determine the energy consumption resulting from all of the characteristics and energy consuming features that are actually proposed for a building, as specified by the Alternative Calculation Method (ACM) Approval Manual.
PUBLIC AREAS are spaces generally open to the public at large, customers or congregation members, or similar spaces where occupants need to be prevented from controlling lights for safety, security, or business reasons.
R-VALUE is the measure of the thermal resistance of insulation or any material or building component expressed in ft2- hr-°F/Btu.

RADIANT BARRIER is a highly reflective, low emitting material installed at the underside surface of the roof deck and the inside surface of gable ends or other exterior vertical surfaces in attics to reduce solar heat gain.
RAISED FLOOR is a floor (partition) over a crawl space, or an unconditioned space, or ambient air.
READILY ACCESSIBLE is capable of being reached quickly for operation, repair or inspection, without requiring climbing or removing obstacles, or resorting to access equipment.
RECOOL is the cooling of air that has been previously heated by space-conditioning equipment or systems serving the same building.
RECOVERED ENERGY is energy used in a building that (1) is recovered from space conditioning, service water heating, lighting, or process equipment after the energy has performed its original function; (2) provides space conditioning, service water heating, or lighting; and (3) would otherwise be wasted.
REFERENCE APPENDICES is the support document for the Building Energy Efficiency Standards and the ACM Approval Manuals. The document consists of three sections: the Reference Joint Appendices (JA), the Reference Residential Appendices (RA), and the Reference Nonresidential Appendices (NA).
REFLECTANCE, SOLAR is the ratio of the reflected solar flux to the incident solar flux.
REFRIGERATED CASE is a manufactured commercial refrigerator or freezer, including but not limited to display cases, reach-in cabinets, meat cases, and frozen food and soda fountain units.
REFRIGERATED SPACE is a space constructed for storage or handling of products, where mechanical refrigeration is used to maintain the space temperature at 55° F or less.
REFRIGERATED WAREHOUSE is a building or a space greater than or equal to 3,000 square feet constructed for storage or handling of products, where mechanical refrigeration is used to maintain the space temperature at 55° F or less.
REHEAT is the heating of air that has been previously cooled by cooling equipment or supplied by an economizer.
RELOCATABLE PUBLIC SCHOOL BUILDING is a relocatable building as defined by Title 24, Part 1, Section 4-314, which is subject to Title 24, Part 1, Chapter 4, Group 1.
REPAIR is the reconstruction or renewal for the purpose of maintenance of any component, system, or equipment of an existing building. Repairs shall not increase the preexisting energy consumption of the repaired component, system, or equipment. Replacement of any component, system, or equipment for which there are requirements in the Standards is considered an alteration and not a repair.
RESIDENTIAL BUILDING (See “high-rise residential building” and “low-rise residential building.”)
RESIDENTIAL COMPLIANCE MANUAL is the manual developed by the Commission, under Section 25402.1 of the Public Resources Code, to aid designers, builders, and contractors in meeting Energy Efficiency Standards for low-rise residential buildings.
RESIDENTIAL SPACE TYPE is one of the following:
Bathroom is a room or area containing a sink used for personal hygiene, toilet, shower, or a tub.
Closet is a nonhabitable room used for the storage of linens, household supplies, clothing, nonperishable food, or similar uses, and which is not a hallway or passageway.
Garage is a nonhabitable building or portion of building, attached to or detached from a residential dwelling unit, in which motor vehicles are parked.
Kitchen is a room or area used for cooking, food storage and preparation and washing dishes, including associated counter tops and cabinets, refrigerator, stove, ovens, and floor area.
Laundry is a nonhabitable room or space which contains plumbing and electrical connections for a washing machine or clothes dryer.
Storage building is a nonhabitable detached building used for the storage of tools, garden equipment, or miscellaneous items.

Utility room is a nonhabitable room or building which contains only HVAC, plumbing, or electrical controls or equipment; and which is not a bathroom, closet, garage, or laundry room.
RESNET 380 is the Residential Energy Services Network document titled “Standard for Testing Airtightness of Building Enclosures, Dwelling Unit, and Sleeping Unit Enclosures, Airtightness of Heating and Cooling Air Distribution Systems; and Airflow of Mechanical Ventilation Systems” 2019 (ANSI/RESNET/ICC 380-2019).
ROOF is the outside cover of a building or structure including the structural supports, decking, and top layer that is exposed to the outside with a slope less than 60° from the horizontal.
ROOF, LOW-SLOPED is a roof that has a ratio of rise to run of less than 2:12 (9.5° from the horizontal).
ROOF, STEEP-SLOPED is a roof that has a ratio of rise to run of greater than or equal to 2:12 (9.5° from the horizontal).
ROOF RECOVER is the process of installing an additional roof covering over a prepared existing roof covering without removing the existing roof covering.
ROOF RECOVER BOARD is a rigid type board, installed directly below a low-sloped roof membrane, with or without above deck thermal insulation, to: (a) improve a roof system's compressive strength, (b) physically separate the roof membrane from the thermal insulation, or (c) physically separate a new roof covering from an underlying roof membrane as part of a roof overlay project.
ROOF REPLACEMENT is the process of removing the existing roof covering, repairing any damaged substrate and installing a new roof covering.
ROOFING PRODUCT is the top layer of the roof that is exposed to the outside, which has properties including but not limited to solar reflectance, thermal emittance, and mass.
RUNOUT is piping that is no more than 12 feet long and that connects to a fixture or an individual terminal unit.
SAE J1772 is the SAE International document titled “SAE Electric Vehicle and Plug in Hybrid Electric Vehicle Conductive Charge Coupler” (SAE J1772_201710).
SATURATED CONDENSING TEMPERATURE (also known as CONDENSING TEMPERATURE) is: (a) for single component and azeotropic refrigerants, the saturation temperature corresponding to the refrigerant pressure at the condenser entrance, or (b) for zeotropic refrigerants, the arithmetic average of the Dew Point and Bubble Point temperatures corresponding to the refrigerant pressure at the condenser entrance.
SCIENTIFIC EQUIPMENT is measurement, testing or metering equipment used for scientific research or investigation, including but not limited to manufactured cabinets, carts and racks.
SEAL CLASS A is a ductwork sealing category that requires sealing all transverse joints, longitudinal seams, and duct wall penetrations. Duct wall penetrations are openings made by pipes, conduit, tie rods, or wires. Longitudinal seams are joints oriented in the direction of airflow. Transverse joints are connections of two duct sections oriented perpendicular to airflow. Openings for rotating shafts shall be sealed with bushings or other devices that seal off air leakage. All connections shall be sealed, including but not limited to spin-ins, taps, other branch connections, access doors, access panels, and duct connections to equipment. Sealing that would void product listings is not required. All duct pressure class ratings shall be designated in the design documents.
SEASONAL ENERGY EFFICIENCY RATIO (SEER) is the total cooling output of an air conditioner in Btu during its normal usage period for cooling divided by the total electrical energy input in watt-hours during the same period, as determined using the applicable test method in the Appliance Efficiency Regulations.
SEASONAL ENERGY EFFICIENCY RATIO 2 (SEER2) is the SEER metric for residential central air conditioners and heat pumps effective January 1, 2023, as created by the U.S. Department of Energy “ISSUANCE 2016-11-30 Energy Conservation Program: Test Procedures for Central Air Conditioners and Heat Pumps, Final Rule”.
SENSIBLE ENERGY RECOVERY RATIO is a ratio of the change in the dry-bulb temperature of the outdoor air supply to the difference in dry-bulb temperature between the outdoor air and entering exhaust airflow, with no adjustment to account for that portion of the dry-bulb temperature change in the leaving supply airflow that is the result of leakage of entering exhaust airflow rather than heat exchange between the airstreams.

SERVICE WATER HEATING is heating of water for sanitary purposes for human occupancy, other than for comfort heating.
SHADING is the protection from heat gains because of direct solar radiation by permanently attached exterior devices or building elements, interior shading devices, glazing material, or adherent materials.
SHADING COEFFICIENT (SC) is the ratio of the solar heat gain through a fenestration product to the solar heat gain through an unshaded 1/8-inch-thick clear double strength glass under the same set of conditions. For nonresidential, high-rise residential, and hotel/motel buildings, this shall exclude the effects of mullions, frames, sashes, and interior and exterior shading devices.
SIDELIT DAYLIT ZONE, PRIMARY is the area in plan view directly adjacent to each vertical glazing, one window head height deep into the area, and window width plus 0.5 times window head height wide on each side of the rough opening of the window, minus any area on a plan beyond a permanent obstruction that is 6 feet or taller as measured from the floor.
SIDELIT DAYLIT ZONE, SECONDARY is the area in plan view directly adjacent to each vertical glazing, two window head heights deep into the area, and window width plus 0.5 times window head height wide on each side of the rough opening of the window, minus any area on a plan beyond a permanent obstruction that is 6 feet or taller as measured from the floor.
SIGN definitions include the following:
Electronic Message Center (EMC) is a pixelated image producing electronically controlled sign formed by any light source. Bare lamps used to create linear lighting animation sequences through the use of chaser circuits, also known as “chaser lights” are not considered an EMC.
Illuminated face is a side of a sign that has the message on it. For an exit sign it is the side that has the word “EXIT” on it.
Sign, cabinet is an internally illuminated sign consisting of frame and face, with a continuous translucent message panel, also referred to as a panel sign.
Sign, channel letter is an internally illuminated sign with multiple components, each built in the shape of an individual three dimensional letter or symbol that are each independently illuminated, with a separate translucent panel over the light source for each element.
Sign, double-faced is a sign with two parallel opposing faces.
Sign, externally illuminated is any sign or a billboard that is lit by a light source that is external to the sign directed towards and shining on the face of the sign.
Sign, internally illuminated is a sign that is illuminated by a light source that is contained inside the sign where the message area is luminous, including cabinet signs and channel letter signs.
Sign, traffic is a sign for traffic direction, warning, and roadway identification.
Sign, unfiltered is a sign where the viewer perceives the light source directly as the message, without any colored filter between the viewer and the light source, including neon, cold cathode, and LED signs.
SINGLE-FAMILY BUILDING is any of the following:
A residential building of Occupancy Group R-3 with two or less dwelling units,
A building of Occupancy Group R-3, other than a multifamily building or hotel/motel building, A townhouse,
A building of Occupancy Group R-3.1, or
A building of Occupancy Group U when located on a residential site.
SINGLE PACKAGE VERTICAL AIR CONDITIONER (SPVAC) is a type of air-cooled small or large commercial package air- conditioning and heating equipment; factory assembled as a single package having its major components arranged vertically, which is an encased combination of cooling and optional heating components; is intended for exterior

mounting on, adjacent interior to, or through an outside wall; and is powered by single or three-phase current. It may contain separate indoor grille, outdoor louvers, various ventilation options, indoor free air discharge, ductwork, wall plenum, or sleeve. Heating components may include electrical resistance, steam, hot water, gas, or no heat but may not include reverse cycle refrigeration as a heating means.
SINGLE PACKAGE VERTICAL HEAT PUMP (SPVHP) is an SPVAC that utilizes reverse cycle refrigeration as its primary heat source, with secondary supplemental heating by means of electrical resistance, steam, hot water, or gas.
SINGLE ZONE SYSTEM is an air distribution system that supplies air to one thermal zone controlled by a single thermostat.
SITE SOLAR ENERGY is thermal, chemical, or electrical energy derived from direct conversion of incident solar radiation at the building site.
SKYLIGHT is fenestration installed on a roof less than 60° from the horizontal.
SKYLIGHT AREA is the area of the rough opening for the skylight.
SKYLIGHT TYPE is one of the following three types of skylights: glass mounted on a curb, glass not mounted on a curb or plastic (assumed to be mounted on a curb).
SKYLIT DAYLIT ZONE is the rough area in plan view under each skylight, plus 0.7 times the average ceiling height in each direction from the edge of the rough opening of the skylight, minus any area on a plan beyond a permanent obstruction that is taller than one-half of the distance from the floor to the bottom of the skylight. The bottom of the skylight is measured from the bottom of the skylight well for skylights having wells, or the bottom of the skylight if no skylight well exists. For the purpose of determining the skylit daylit zone, the geometric shape of the skylit daylit zone shall be identical to the plan view geometric shape of the rough opening of the skylight; for example, for a rectangular skylight the skylit daylit zone plan area shall be rectangular, and for a circular skylight the skylit daylit zone plan area shall be circular. For skylight located in an atrium, the skylit daylit zone shall include the floor area directly under the atrium, and the area of the top floor that is directly under the skylight, plus 0.7 times the average ceiling height of the top floor, in each direction from the edge of the rough opening of the skylight, minus any area on a plan beyond a permanent obstruction that is taller than one-half of the distance from the top floor to the bottom of the skylight.
SMACNA is the Sheet Metal and Air-Conditioning Contractors National Association.
SMACNA HVAC DUCT CONSTRUCTION STANDARDS is the Sheet Metal Contractors’ National Association document "HVAC Duct Construction Standards Metal and Flexible - 3rd Edition," 2006 (2006 ANSI/SMACNA-006-2006 HVAC Duct Construction Standards Metal and Flexible 3rd Edition).
SMACNA RESIDENTIAL COMFORT SYSTEM INSTALLATION STANDARDS is the Sheet Metal Contractors’ National Association document titled “Residential Comfort System Installation Standards, Eighth Edition.” (2016).
SOCIAL SERVICES BUILDING is a space where public assistance and social services are provided to individuals or families.
SOLAR ELECTRIC GENERATION SYSTEM or PHOTOVOLTAIC SYSTEM is the complete set of all components for converting sunlight into electricity through the photovoltaic process, including the array of panels, inverter(s) and the balance of system components required to enable the system to effectively deliver power to reduce a building’s consumption of electricity from the utility grid.
SOLAR REFLECTANCE INDEX (SRI) is a measure of the roof's ability to reject solar heat which includes both reflectance and emittance.
SOLAR SAVINGS FRACTION (SSF) is the fraction of domestic hot water demand provided by a solar water-heating system.
SOLAR ZONE is a section of the roof designated and reserved for the future installation of a solar electric or solar thermal system.
SOUTH-FACING (See “orientation.”)
SPA is a vessel that contains heated water in which humans can immerse themselves, is not a pool, and is not a bathtub.
SPACE-CONDITIONING SYSTEM is a system that provides mechanical heating, or mechanical cooling within or associated with conditioned spaces in a building, and may incorporate use of components such as chillers/compressors, fluid

distribution systems (e.g., air ducts, water piping, refrigerant piping), pumps, air handlers, cooling and heating coils, air or water cooled condensers, economizers, terminal units, and associated controls.
STANDARD DESIGN BUILDING is a building that is automatically simulated by Commission-approved compliance software to establish the Energy Budget that is the maximum energy consumption allowed by a Proposed Design Building to comply with the Title 24 Building Energy Efficiency Standards. The Standard Design building is simulated using the same location and having the same characteristics of the Proposed Design building, but assuming minimal compliance with the mandatory and prescriptive requirements that are applicable to the proposed building, as specified by the Alternative Calculation Methods Approval Manual.
STORAGE, COLD, is a storage area within a refrigerated warehouse where space temperatures are maintained at or above 32° F.
STORAGE, FROZEN is a storage area within a refrigerated warehouse where the space temperatures are maintained below 32° F.
TENANT SPACE is a portion of a building occupied by a tenant.
THERMAL MASS is solid or liquid material with a high overall heat capacity to store energy for heating or cooling requirements.
THERMAL RESISTANCE (R) is a measurement of the resistance over time of a material or building component to the passage of heat in (hr × ft² × °F)/Btu.
THERMOSTAT is an automatic control device or system used to maintain temperature at a fixed or adjustable setpoint.
THERMOSTATIC EXPANSION VALVE (TXV) is a refrigerant metering valve, installed in an air conditioner or heat pump, which controls the flow of liquid refrigerant entering the evaporator in response to the superheat of the gas leaving it.
TIME DEPENDENT VALUATION (TDV) ENERGY is the time varying energy caused to be used by the building to provide space conditioning and water heating and for specified buildings lighting. TDV energy accounts for the energy used at the building site and consumed in producing and in delivering energy to a site, including, but not limited to, power generation, transmission and distribution losses.
TOTAL HEAT OF REJECTION (THR) is the heat rejected by refrigeration system compressors at design conditions, consisting of the design cooling capacity plus the heat of compression added by the compressors.
TOWNHOUSE is a single-family dwelling unit constructed in a group of three or more attached units in which each unit extends from the foundation to roof and with open space on at least two sides.
TRANSCRITICAL CO2 REFRIGERATION SYSTEM is a type of refrigeration system that uses CO2 as the refrigerant where the ultimate heat rejection to ambient air can take place above the critical point.
SUBCRITICAL MODE is a system operating condition for a refrigeration system wherein the refrigerant pressure and temperature leaving the compressor is such that the refrigerant is below the critical point. Typically used in reference to CO2 refrigeration systems.
TRANSCRITICAL MODE is a system operating condition for a refrigeration system wherein the refrigerant pressure and temperature leaving the compressor is such that the refrigerant is at or above the critical point. Typically used in reference to CO2 refrigeration systems.
TRANSIENT is the occupancy for not more than 30 days of a dwelling unit or sleeping unit.
TRIM COMPRESSOR is a compressor that is designated for part-load operation, handling the short term variable trim load of end uses, in addition to the fully loaded base compressors.
U-FACTOR is the overall coefficient of thermal transmittance of a fenestration, wall, floor, or roof/ceiling component, in Btu/(hr × ft² × ºF), including air film resistance at both surfaces.
UL is the Underwriters Laboratories.
UL 181 is the Underwriters Laboratories document titled “Standard for Safety for Factory-Made Air Ducts and Air Connectors,” 2017 (UL 181).

UL 181A is the Underwriters Laboratories document titled “Standard for Safety for Closure Systems for Use With Rigid Air Ducts,” 2017 (UL 181A).
UL 181B is the Underwriters Laboratories document titled “Standard for Safety for Closure Systems for Use With Flexible Air Ducts and Air Connectors,” 2017 (UL 181B).
UL 723 is the Underwriters Laboratories document titled “Standard for Safety for Test for Surface Burning Characteristics,” 2018 (UL 723).
UL 727 is the Underwriters Laboratories document titled “Standard for Safety for Oil-Fired Central Furnaces,”2018 (UL727).
UL 731 is the Underwriters Laboratories document titled “Standard for Safety for Oil-Fired Unit Heaters,” 2018 (UL 731).
UL 1077 is the Underwriters Laboratories document titled “Standard for Safety for Supplementary Protectors for Use in Electrical Equipment”, 2016 (UL 1077).
UL 1574 is the Underwriters Laboratories document titled " Standard for Safety for Track Lighting Systems," 2020 (UL 1574).
UL 1598 is the Underwriters Laboratories document titled “Standard for Safety for Luminaires,” 2021 ( UL 1598).
UL 1741 is the Underwriter Laboratories document titled “Standard for Safety for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources,” 2021 (UL 1741).
UL 1973 is the Underwriter Laboratories document titled “Standard for Safety for Batteries for Use in Stationary, Vehicle Auxiliary Power and Light Electric Rail (LER) Applications),” 2018 (ANSI/CAN/UL 1973:2018).
UL 2108 is the Underwriters Laboratories document titled “Standard for Safety for Low Voltage Lighting Systems,” 2019 (UL 2108).
UL 8750 is the Underwriters Laboratories document titled “Standards for Safety for Light Emitting Diode (LED) Equipment for Use in Lighting Products,”2021 (UL 8750).
UL 9540 is the Underwriter Laboratories document titled “Standard for Safety for Energy Storage Systems and Equipment” 2020 (ANSI/CAN/UL 9540:2021)
UNCONDITIONED SPACE is enclosed space within a building that is not directly conditioned, or indirectly conditioned.
UNIFORM ENERGY FACTOR (UEF) of a water heater is a measure of overall water heater efficiency, as determined using the applicable test method in the Appliance Efficiency Regulations.
USDOE 10 CFR 430 is the regulation issued by Department of Energy and available in the Code of Federal Regulation - Title 10, Chapter II, Subchapter D, Part 430 – Energy Conservation Program for Consumer Products. Relevant testing methodologies are specified in applicable appendices.
USDOE 10 CFR 431 is the regulation issued by Department of Energy and available in the Code of Federal Regulation - Title 10, Chapter II, Subchapter D, Part 431 - Energy Conservation Program for Certain Commercial and Industrial equipment. Relevant testing methodologies are specified in “Subpart E to Part 431 – Uniform test method for the measurement of energy efficiency of commercial packaged boilers.”
VAPOR RETARDER CLASS is a measure of the ability of a material or assembly to limit the amount of moisture that passes through the material or assembly meeting Section 202 of the California Building Code.
VARIABLE AIR VOLUME (VAV) SYSTEM is a space-conditioning system that maintains comfort levels by varying the volume of supply air to the zones served.
VENDING MACHINE is a machine for vending and dispensing refrigerated or nonrefrigerated food and beverages or general merchandise.
VENTILATION SYSTEM, BALANCED is a mechanical device intended to remove air from buildings, and simultaneously replace it with outdoor air.

VENTILATION SYSTEM, CENTRAL FAN INTEGRATED, or CFI is a ventilation system configuration in which the ventilation ductwork is connected to the duct system of a dwelling unit space conditioning system to enable distribution of ventilation air to the dwelling unit while the space conditioning system air handling unit is operating.
VENTILATION SYSTEM, ENERGY RECOVERY, or ERV is a mechanical device intended to remove air from buildings, simultaneously replace it with outdoor air, and in the process transfer heat from the warmer to the colder of the simultaneous airflows and transfer moisture from the most humid to least humid of the simultaneous airflows.
VENTILATION SYSTEM, EXHAUST is a mechanical device intended to remove air from buildings, causing outdoor air to enter by ventilation inlets or normal leakage paths through the building envelope.
VENTILATION SYSTEM, HEAT RECOVERY, or HRV is a mechanical device intended to remove air from buildings, simultaneously replace it with outdoor air, and in the process transfer heat from the warmer to the colder of the simultaneous airflows.
VENTILATION SYSTEM, SUPPLY is a mechanical device intended to bring outdoor air into buildings, causing indoor air to flow out of the building through ventilation relief outlets or normal leakage paths through the building envelope.
VERY VALUABLE MERCHANDISE is rare or precious objects, including, but not limited to, jewelry, coins, small art objects, crystal, ceramics, or silver, the selling of which involves customer inspection of very fine detail from outside of a locked case.
VIRTUAL END NODE (VEN) is an interface with a demand responsive control system that accepts signals transmitted through OpenADR, consistent with the specifications in OpenADR 2.0a or 2.0b.
WALL TYPE is a type of wall assembly having a specific heat capacity, framing type, and U-factor. WATER BALANCE IN EVAPORATIVE COOLING TOWERS The water balance of a cooling tower is: M = E + B, where:
M = makeup water (from the mains water supply) E = losses due to evaporation
B = losses due to blowdown
WEST-FACING (See “orientation”)
WINDOW FILM is a fenestration attachment product that consists of a flexible adhesive-backed polymer film which may be applied to the interior or exterior surface of an existing glazing system.
WOOD HEATER is an enclosed wood-burning appliance used for space heating and/or domestic water heating.
WOOD STOVE (See “wood heater.”)
ZONAL describes characterized by or relating to a zone or zones.
ZONE, CRITICAL is a zone serving a process where reset of the zone temperature setpoint during a demand shed event might disrupt the process, including but not limited to computer rooms, data centers, telecom and private branch exchange (PBX) rooms, and laboratories.
ZONE, NONCRITICAL is a zone that is not a critical zone.
ZONE, SPACE-CONDITIONING, is a space or group of spaces within a building with sufficiently similar comfort conditioning requirements so that comfort conditions, as specified in Section 140.4(b)3 or 150.0(h), as applicable, can be maintained throughout the zone by a single controlling device.

NOTE: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections 25007,
25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and 25943, Public Resources Code.

CALIFORNIA BUILDING CLIMATE ZONES

Alturas
S

Eureka#S

1

16

2

11

#S

South Lake Tahoe

#S

SONOMA

Sacramento

12

San Francisco #S

S

3

S

Fresno

4

13

Bakersfield
S

14

Barstow
S

5

9

16

6

10

16

8

N

7

15

14

W

E

San Diego #S

S

50

0

50

100 Miles

CALIFORNIA ENERGY COMMISSION
SYSTEMS ASSESMENT & FACILITIES SITING DIVISION CARTOGRAPHY UNIT
MARCH 2005

T:\Projects\CEC\Mexico\MX Border.apr VIEW: CZ Building B&W 8.5X11 LAYOUT:CZ Building B&W 8.5X11

FIGURE 100.1-A—CALIFORNIA CLIMATE ZONES
Climate Zones for Residential and Nonresidential Occupancies

SECTION 100.2 – CALCULATION OF TIME DEPENDENT VALUATION (TDV) ENERGY
Time Dependent Valuation (TDV) energy shall be used to compare proposed designs to their energy budget when using the performance compliance approach. TDV energy is calculated by multiplying the site energy use (electricity kWh, natural gas therms, or fuel oil or LPG gallons) for each energy type times the applicable TDV multiplier. TDV multipliers vary for each hour of the year and by energy type (electricity, natural gas or propane), by Climate Zone and by building type (low-rise residential or nonresidential, high-rise residential or hotel/motel). TDV multipliers are summarized in Reference Joint Appendix JA3. TDV multipliers for propane shall be used for all energy obtained from depletable sources other than electricity and natural gas.
NOTE: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and 25943, Public Resources Code.

SUBCHAPTER 2
ALL OCCUPANCIES—MANDATORY REQUIREMENTS FOR THE MANUFACTURE, CONSTRUCTION AND INSTALLATION OF SYSTEMS, EQUIPMENT AND BUILDING COMPONENTS

SECTION 110.0 – SYSTEMS AND EQUIPMENT—GENERAL
Sections 110.1 through 110.12 specify requirements for manufacturing, construction and installation of certain systems, equipment, appliances and building components that are installed in buildings within the scope of Section 100.0(a).
NOTE: The requirements of Sections 110.0 through 110.12 apply to newly constructed buildings. Sections 141.0 and
150.2 specify which requirements of Sections 110.1 through 110.12 also apply to additions and alterations to existing buildings.
	General Requirements. Systems, equipment, appliances and building components shall only be installed in a building within the scope of Section 100.0(a) regulated by Part 6 only if:
The manufacturer has certified that the system, equipment, appliances or building component complies with the applicable manufacturing provisions of Sections 110.1 through 110.12; and
The system, equipment, appliance or building component complies with all applicable installation provisions of Sections 110.1 through 110.12.
Certification Requirements for Manufactured Systems, Equipment, Appliances and Building Components.
Appliances that are within the scope of Section 1601 of the Appliance Efficiency Regulations shall only be installed if they have been certified to the Energy Commission by the manufacturer, pursuant to the provisions of Title 20 California Code of Regulations, Section 1606; or
Systems, equipment, appliances and building components that are required by Part 6 or the Reference Appendices to be certified to the Energy Commission, which are not appliances that are within the scope of Section 1601 of the Appliance Efficiency Regulations, shall only be installed if they are certified by the manufacturer in a declaration, executed under penalty of perjury under the laws of the State of California, that:
all the information provided pursuant to the certification is true, complete, accurate and in compliance with all applicable requirements of Part 6; and
the equipment, product, or device was tested using the test procedure specified in Part 6 if applicable
The certification status of any system, equipment, appliance or building component shall be confirmed only by reference to:
A directory published or approved by the Commission; or
A copy of the application for certification from the manufacturer and the letter of acceptance from the Commission staff; or
Written confirmation from the publisher of a Commission-approved directory that a device has been certified; or
A Commission-approved label on the device.
Note: Part 6 does not require a builder, designer, owner, operator, or enforcing agency to test any certified device to determine its compliance with minimum specifications or efficiencies adopted by the Commission.

Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and 25943, Public Resources Code.

SECTION 110.1 – MANDATORY REQUIREMENTS FOR APPLIANCES
Any appliance regulated by the Appliance Efficiency Regulations, Title 20 California Code of Regulations, Section 1601 et seq., may be installed only if the appliance fully complies with Section 1608(a) of those regulations.
Except for those circumstances described in Section 110.1(c), conformance with efficiency levels required to comply with Part 6 mandatory, prescriptive and performance standards shall be verified utilizing data from either:
The Energy Commission’s database of certified appliances maintained pursuant to Title 20 California Code of Regulations Section 1606, and which is available at: www.energy.ca.gov/appliances/database/; or
An equivalent directory published by a federal agency; or
An approved trade association directory as defined in Title 20 California Code of Regulations Section 1606(h).
Conformance with efficiency levels required to comply with Part 6 mandatory, prescriptive and performance standards shall be demonstrated either by default to the mandatory efficiency levels specified in Part 6 or by following procedures approved by the Commission pursuant to Section 10-109 of Title 24, Part 1, when:
Data to verify conformance with efficiency levels required to comply with Part 6 mandatory, prescriptive and performance standards is not available pursuant to subdivision (b); or
Field verification and diagnostic testing is required for compliance with Part 6 and the Energy Commission has not approved a field verification and diagnostic test protocol that is applicable to the appliance; or
The appliance meets the requirements of Section 110.1(a) but has been site-modified in a way that affects its performance; or
The U.S. Department of Energy has approved a waiver from federal test procedures, pursuant to 10 CFR Section 430.27 or Section 431.401 and that waiver fails to specify how the efficiency of the system shall be determined.
Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and 25943, Public Resources Code.

SECTION 110.2 – MANDATORY REQUIREMENTS FOR SPACE-CONDITIONING EQUIPMENT
Certification by manufacturers. Any space-conditioning equipment listed in this section may be installed only if the manufacturer has certified to the Commission that the equipment complies with all the applicable requirements of this section.
Efficiency. Equipment shall meet the applicable efficiency requirements in Tables 110.2-A through 110.2-N, subject to the following:
If more than one efficiency standard is listed for any equipment in Tables 110.2-A through 110.2-N, the equipment shall meet all the applicable standards that are listed; and
If more than one test method is listed in Tables 110.2-A through 110.2-N, the equipment shall comply with the applicable efficiency standard when tested with each listed test method; and
Where equipment serves more than one function, it shall comply with the efficiency standards applicable to each function; and
Where a requirement is for equipment rated at its “maximum rated capacity” or “minimum rated capacity,” the capacity shall be as provided for and allowed by the controls, during steady-state operation.
Exception 1 to Section 110.2(a): Water-cooled centrifugal water-chilling packages that are not designed for operation at ANSI/AHRI Standard 550/590 test conditions of 44°F leaving chilled water temperature and 85°F entering condenser water temperature with 3 gallons per minute per ton condenser water flow shall have a maximum full load kW/ton and NPLV ratings adjusted using the following equation:
Adjusted maximum full-load kW/ton rating = (full- load kW/ton from Table 110.2-D)/Kadj Adjusted maximum NPLV rating = (IPLV from Table 110.2-D)/Kadj
Where:
Kadj = (A) × (B)
A = 0.00000014592 × (LIFT)4 – 0.0000346496 × (LIFT)3 + 0.00314196 × (LIFT)2 – 0.147199 × (LIFT) + 3.9302
LIFT = LvgCond – LvgEvap (°F)
LvgCond = Full-load leaving condenser fluid temperature (°F) LvgEvap = Full-load leaving evaporator fluid temperature (°F)
B = (0.0015 × LvgEvap) + 0.934
The adjusted full-load and NPLV values are only applicable for centrifugal chillers meeting all of the following full-load design ranges:
Minimum Leaving Evaporator Fluid Temperature: 36°F
Maximum Leaving Condenser Fluid Temperature: 115°F
LIFT ³ 20°F and £ 80°F
Centrifugal chillers designed to operate outside of these ranges are not covered by this exception.
Exception 2 to Section 110.2(a): Positive displacement (air-cooled and water-cooled) chillers with a leaving evaporator fluid temperature higher than 32°F shall show compliance with Table 110.2-D when tested or certified with water at standard rating conditions, per the referenced test procedure.
Exception 3 to Section 110.2(a): Equipment primarily serving refrigerated warehouses or commercial refrigeration.
Controls for heat pumps with supplementary electric resistance heaters. Heat pumps with supplementary electric resistance heaters shall have controls:

That prevent supplementary heater operation when the heating load can be met by the heat pump alone; and
In which the cut-on temperature for compression heating is higher than the cut-on temperature for supplementary heating, and the cut-off temperature for compression heating is higher than the cut-off temperature for supplementary heating.
Exception 1 to Section 110.2(b): The controls may allow supplementary heater operation during:
Defrost; and
Transient periods such as start-ups and following room thermostat setpoint advance, if the controls provide preferential rate control, intelligent recovery, staging, ramping or another control mechanism designed to preclude the unnecessary operation of supplementary heating.
Exception 2 to Section 110.2(b): Room air-conditioner heat pumps.
Thermostats. All heating or cooling systems not controlled by a central energy management control system (EMCS) shall have a setback thermostat.
Setback capabilities. All thermostats shall have a clock mechanism that allows the building occupant to program the temperature setpoints for at least four periods within 24 hours. Thermostats for heat pumps shall meet the requirements of Section 110.2(b).
Exception to Section 110.2(c): Gravity gas wall heaters, gravity floor heaters, gravity room heaters, noncentral electric heaters, fireplaces or decorative gas appliances, wood stoves, room air conditioners and room air- conditioner heat pumps.
Gas-fired and oil-fired furnace standby loss controls. Gas-fired and oil-fired forced-air furnaces with input ratings ³ 225,000 Btu/hr shall also have an intermittent ignition or interrupted device (IID), and have either power venting or a flue damper. A vent damper is an acceptable alternative to a flue damper for furnaces where combustion air is drawn from the conditioned space. All furnaces with input ratings ³ 225,000 Btu/hr, including electric furnaces, that are not located within the conditioned space shall have jacket losses not exceeding 0.75 percent of the input rating.
Open and closed-circuit cooling towers. All open and closed cooling tower installations shall comply with the following:
Be equipped with conductivity or flow-based controls that maximize cycles of concentration based on local water quality conditions. Controls shall automate system bleed and chemical feed based on conductivity, or in proportion to metered makeup volume, metered bleed volume, recirculating pump run time, or bleed time. Conductivity controllers shall be installed in accordance with manufacturer’s specifications in order to maximize accuracy.
Documentation of maximum achievable cycles of concentration. Building owners shall document the maximum cycles of concentration based on local water supply as reported annually by the local water supplier, and using the calculator approved by the Energy Commission. The calculator is intended to determine maximum cycles based on a Langelier Saturation Index (LSI) of 2.5 or less. Building owner shall document maximum cycles of concentration on the mechanical compliance form which shall be reviewed and signed by the Professional Engineer (P.E.) of Record.
Be equipped with a flow meter with an analog output for flow either hardwired or available through a gateway on the makeup water line.
Be equipped with an overflow alarm to prevent overflow of the sump in case of makeup water valve failure. Overflow alarm shall send an audible signal or provide an alert via the energy management control system to the tower operator in case of sump overflow.
Be equipped with efficient drift eliminators that achieve drift reduction to 0.002 percent of the circulated water volume for counter-flow towers and 0.005 percent for cross-flow towers.
Exception to Section 110.2(e): Open and closed-circuit cooling towers with rated capacity < 150 tons.
Low leakage air-handling units. To qualify as a low leakage air-handling unit for use for meeting the requirements for applicable low leakage air-handling unit compliance credit(s) available in the performance standards set forth in

Sections 150.1(b) and 140.1, the manufacturer shall certify to the Energy Commission that the air-handling unit meets the specifications in Reference Joint Appendix JA9.
TABLE 110.2-A AIR CONDITIONERS AND CONDENSING UNITS – MINIMUM EFFICIENCY REQUIREMENTS
Equipment Type	Size Category	Efficiency	Test Procedureb	
Air conditioners, air cooled
both split system
and single package	≥ 65,000 Btu/h and
< 135,000 Btu/h	11.2 EERa
14.8 IEERa	AHRI 340/360	
Air conditioners, air cooled
both split system
and single package	≥ 135,000 Btu/h and
< 240,000 Btu/h	11.0 EERa
14.2 IEERa	AHRI 340/360	
Air conditioners, air cooled both split system
and single package	≥ 240,000 Btu/h and
< 760,000 Btu/h	10.0 EERa
13.2 IEERa	AHRI 340/360	
Air conditioners, air cooled both split system
and single package	≥ 760,000 Btu/h	9.7 EERa
12.5 IEERa	AHRI 340/360	
Air conditioners, water cooled	≥ 65,000 Btu/h and
< 135,000 Btu/h	12.1 EERa
13.9 IEERa	AHRI 340/360	
Air conditioners, water cooled	≥135,000 Btu/h and
< 240,000 Btu/h	12.5 EERa
13.9 IEERa	AHRI 340/360	
Air conditioners, water cooled	≥240,000 Btu/h and
< 760,000 Btu/h	12.4 EERa
13.6 IEERa	AHRI 340/360	

CONTINUED: TABLE 110.2-A AIR CONDITIONERS AND CONDENSING UNITS – MINIMUM EFFICIENCY REQUIREMENTS
Equipment Type	Size Category	Efficiency	Test Procedureb	
Air conditioners, water cooled	≥ 760,000 Btu/h	12.2EERa
13.5 IEERa	AHRI 340/360	
Air conditioners, evaporatively cooled	≥65,000 Btu/h and
< 135,000 Btu/h	12.1 EERa
12.3 IEERa	AHRI 340/360	
Air conditioners, evaporatively cooled	≥ 135,000 Btu/h and
< 240,000 Btu/h	12.0 EERa
12.2 IEERa	AHRI 340/360	
Air conditioners, evaporatively cooled	≥240,000 Btu/h and
< 760,000 Btu/h	11.9 EERa
12.1 IEERa	AHRI 340/360	
Air conditioners, evaporatively cooled	≥ 760,000 Btu/h	11.7 EERa
11.9 IEERa	AHRI 340/360	
Condensing units, air cooled	≥ 135,000 Btu/h	10.5 EER
11.8 IEER	AHRI 365	
Condensing units, water cooled	≥ 135,000 Btu/h	13.5 EER
14.0 IEER	AHRI 365	
Condensing units, evaporatively cooled	≥ 135,000 Btu/h	13.5 EER
14.0 IEER	AHRI 365	
a	Deduct 0.2 from the required EERs and IEERs for units with a heating section other than electric resistance heat.
b	Applicable test procedure and reference year are provided under the definitions.

TABLE 110.2-B HEAT PUMPS, MINIMUM EFFICIENCY REQUIREMENTS
Equipment Type	Size Category	Rating Condition	Efficiency a	Test Procedureb	
Air Cooled	≥ 65,000 Btu/h and		11.0 EER	AHRI 340/360	
(Cooling Mode),	< 135,000 Btu/h		14.1 IEER		
both split system					
and single					
package					
Air Cooled	≥ 135,000 Btu/h and		10.6 EER	AHRI 340/360	
(Cooling Mode),	< 240,000 Btu/h		13.5 IEER		
both split system					
and single					
package					
Air Cooled	≥ 240,000 Btu/h		9.5 EER	AHRI 340/360	
(Cooling Mode),			12.5 IEER		
both split system					
and single					
package					
Water source (cooling mode)	≥ 65,000 Btu/h and
< 135,000 Btu/h	86ºF entering water	13.0 EER	ISO-13256-1	
Groundwater source (cooling mode)	
< 135,000 Btu/h	59ºF entering water	18.0 EER	ISO-13256-1	
Ground source (cooling mode)	
< 135,000 Btu/h	77ºF entering water	14.1 EER	ISO-13256-1	
Water source water-to-water (cooling mode)	
< 135,000 Btu/h	86ºF entering water	10.6 EER	ISO-13256-2	
Groundwater source water-to- water (cooling mode)	
< 135,000 Btu/h	59ºF entering water	16.3 EER	ISO-13256-2	
Ground source brine-to-water (cooling mode)	
< 135,000 Btu/h	77ºF entering water	12.1 EER	ISO-13256-2	
Air Cooled (Heating Mode)		47° F db/43° F wb outdoor air	3.4 COP	AHRI 340/360	
Split system and
single package	≥ 65,000 Btu/h and
< 135,000 Btu/h				
	(cooling capacity)				
Air Cooled (Heating Mode)
Split system and	
≥ 65,000 Btu/h and
< 135,000 Btu/h	17° F db/15° F wb outdoor air	2.25 COP	AHRI 340/360	
single package	(cooling capacity)				

Air Cooled (Heating Mode) Split system and single package	
≥ 135,000 Btu/h
(cooling capacity)	47° F db/43° F wb outdoor air	3.3 COP	AHRI 340/360	
Air Cooled (Heating Mode) Split system and
single package	≥ 135,000 Btu/h
(cooling capacity)	17° F db/15° F wb outdoor air	2.05 COP	AHRI 340/360	
Water source (heating mode)	< 135,000 Btu/h (cooling capacity)	68ºF entering water	4.3 COP	ISO-13256-1	
Water source (heating mode)	≥ 135,000 Btu/h and
< 240,000 Btu/h	68ºF entering water	2.90 COP	ISO-13256-1	
Groundwater source (heating mode)	
< 135,000 Btu/h (cooling capacity)	50ºF entering water	3.7 COP	ISO-13256-1	
Ground source (heating mode)	
< 135,000 Btu/h (cooling capacity)	32ºF entering water	3.2 COP	ISO-13256-1	
Water source water-to-water (heating mode)	
< 135,000 Btu/h (cooling capacity)	68ºF entering water	3.7 COP	ISO-13256-2	
Groundwater source water-to- water
(heating mode)	
< 135,000 Btu/h (cooling capacity)	50ºF entering water	3.1 COP	ISO-13256-2	
Ground source brine-to-water (heating mode)	
< 135,000 Btu/h (cooling capacity)	32ºF entering water	2.5 COP	ISO-13256-2	
a Deduct 0.2 from the required EERs and IEERs for units with a heating section other than electric resistance heat.
b Applicable test procedure and reference year are provided under the definitions.

TABLE 110.2-C AIR-COOLED GAS-ENGINE HEAT PUMPS
Equipment Type	Size Category	Subcategory or Rating Condition	Efficiency	Test Procedurea	
Air-Cooled Gas-Engine Heat Pump
(Cooling Mode)	All Capacities	95° F db Outdoor Air	0.60 COP	ANSI Z21.40.4A	
Air-Cooled Gas-Engine Heat Pump
(Heating Mode)	All Capacities	47° F db/43° F wb Outdoor Air	0.72 COP	ANSI Z21.40.4A	
a Applicable test procedure and reference year are provided under the definitions.

TABLE 110.2-D WATER CHILLING PACKAGES – MINIMUM EFFICIENCY REQUIREMENTS a,b
Equipment Type	Size Category	Path A Efficiency a,b	Path B Efficiency a,b	Test Procedure c	
Air Cooled, With Condenser
Electrically Operated	< 150 Tons	≥ 10.100 EER
≥ 13.700 IPLV	≥ 9.700 EER
≥15.800 IPLV	AHRI 550/590	
Air Cooled, With Condenser
Electrically Operated	≥ 150 Tons	≥ 10.100 EER
≥ 14.000 IPLV	≥ 9.700 EER
≥16.100 IPLV	AHRI 550/590	
Air Cooled, Without Condenser Electrically Operated	All Capacities	Air-cooled chillers without condensers must be rated with matching condensers and comply with the air- cooled chiller efficiency requirements.	Air-cooled chillers without condensers must be rated with matching condensers and comply with the air-cooled chiller efficiency requirements.	AHRI 550/590	
Water Cooled, Electrically Operated, Reciprocating	All Capacities	Reciprocating units must comply with the water- cooled positive displacement efficiency requirements.	Reciprocating units must comply with the water-cooled positive displacement efficiency requirements.	AHRI 550/590	
Water Cooled, Electrically Operated
Positive Displacement	< 75 Tons	≤0.750kW/ton
≤ 0.600 IPLV	≤ 0.780 kW/ton
≤ 0.500 IPLV	AHRI 550/590	
Water Cooled, Electrically Operated
Positive Displacement	≥ 75 tons and <
150 tons	≤ 0.720 kW/ton
≤ 0.560 IPLV	≤ 0.750 kW/ton
≤ 0.490 IPLV	AHRI 550/590	
Water Cooled, Electrically Operated
Positive Displacement	≥ 150 tons and <
300 tons	≤ 0.660 kW/ton
≤ 0.540 IPLV	≤ 0.680 kW/ton
≤ 0.440 IPLV	AHRI 550/590	
Water Cooled, Electrically Operated
Positive Displacement,	≥ 300 Tons and <
600 tons	≤ 0.610kW/ton
≤ 0.520 IPLV	≤ 0.625 kW/ton
≤ 0.410 IPLV	AHRI 550/590	
Water Cooled, Electrically Operated
Positive Displacement	≥ 600 tons	≤ 0.560 kW/ton
≤ 0.500 IPLV	≤ 0.585 kW/ton
≤ 0.380 IPLV	AHRI 550/590	
Water Cooled, Electrically Operated, Centrifugal	< 150 Tons	≤ 0.610 kW/ton
≤ 0.550IPLV	≤ 0.695 kW/ton
≤ 0.440 IPLV	AHRI 550/590	
Water Cooled, Electrically Operated, Centrifugal	≥ 150 tons and <
300 tons	≤ 0.610 kW/ton
≤ 0.550 IPLV	≤ 0.635 kW/ton
≤ 0.400 IPLV	AHRI 550/590	
Water Cooled, Electrically Operated, Centrifugal	≥ 300 tons and <
400 tons	≤ 0.560 kW/ton
≤ 0.520 IPLV	≤ 0.595 kW/ton
≤ 0.390 IPLV	AHRI 550/590	
Water Cooled, Electrically Operated, Centrifugal	≥ 400 tons and <
600 tons	≤ 0.560 kW/ton
≤ 0.500 IPLV	≤ 0.585 kW/ton
≤ 0.380 IPLV	AHRI 550/590	
Water Cooled, Electrically Operated, Centrifugal	≥ 600 tons	≤ 0.560 kW/ton
≤ 0.500 IPLV	≤ 0.585 kW/ton
≤ 0.380 IPLV	AHRI 550/590	

CONTINUED: TABLE 110.2-D WATER CHILLING PACKAGES – MINIMUM EFFICIENCY REQUIREMENTS a,b
Equipment Type	Size Category	Path A Efficiency a,b	Path B Efficiency a,b	Test Procedure c	
Air Cooled Absorption, Single Effect	All Capacities	≥0.600 COP	N.A. d	AHRI 560	
Water Cooled Absorption, Single Effect	All Capacities	≥ 0.700 COP	N.A. d	AHRI 560	
Absorption Double Effect, Indirect-Fired	All Capacities	≥ 1.000 COP
≥ 1.050 IPLV	N.A. d	AHRI 560	
Absorption Double Effect, Direct-Fired	All Capacities	≥ 1.000 COP
≥1.000 IPLV	N.A. d	AHRI 560	
Water Cooled Gas Engine Driven Chiller	All Capacities	≥ 1.2 COP
≥ 2.0 IPLV	N.A. d	ANSI Z21.40.4A	
a No requirements for:
Centrifugal chillers with design leaving evaporator temperature < 36°F; or
Positive displacement chillers with design leaving fluid temperature ≤ 32°F; or
Absorption chillers with design leaving fluid temperature < 40°F.
b Must meet the minimum requirements of Path A or Path B. However, both the full load (COP) and IPLV must be met to fulfill the requirements of the applicable Path.
c See Section 100.1 for definitions.
d N.A. means not applicable.

TABLE 110.2-E PACKAGED TERMINAL AIR CONDITIONERS AND PACKAGED TERMINAL HEAT PUMPS – MINIMUM EFFICIENCY REQUIREMENTS
Equipment Type	Size Category (Input)	Subcategory or Rating Condition	Efficiency	Test Procedure c	
PTAC (Cooling mode) Newly constructed or newly conditioned
buildings or additions	All Capacities	95°F db Outdoor Air	14.0 - (0.300 ×
Cap/1000) a EER	AHRI 310/380	
PTAC (Cooling mode) Replacements b	All Capacities	95°F db Outdoor Air	10.9 - (0.213 ×
Cap/1000) a EER	AHRI 310/380	
PTHP (Cooling mode) Newly constructed or newly conditioned
buildings or additions	All Capacities	95°F db Outdoor Air	14.0 - (0.300 ×
Cap/1000) a EER	AHRI 310/380	
PTHP (Cooling mode) Replacements b	All Capacities	95°F db Outdoor Air	10.8 - (0.213 ×
Cap/1000) a EER	AHRI 310/380	
PTHP (Heating Mode) Newly constructed or newly conditioned
buildings or additions	All Capacities	-	3.7 - (0.052 × Cap/1000) a
COP	AHRI 310/380	
PTHP (Heating mode) Replacements b	All Capacities	-	2.9 - (0.026 × Cap/1000) a
COP	AHRI 310/380	
SPVAC (Cooling Mode)	<65,000 Btu/h	95°F db / 75°F wb Outdoor Air	
11.0 EER	AHRI 390	
SPVAC (Cooling Mode)	≥65,000 Btu/h and
<135,000 Btu/h	95°F db / 75°F wb Outdoor Air	10.0 EER	AHRI 390	
SPVAC (Cooling Mode)	≥135,000 Btu/h and
<240,000 Btu/h	95°F db / 75°F wb Outdoor Air	10.0 EER	AHRI 390	
SPVHP (Cooling Mode)	<65,000 Btu/h	95°F db / 75°F wb Outdoor Air	
11.0 EER	AHRI 390	
SPVHP (Cooling Mode)	≥65,000 Btu/h and
<135,000 Btu/h	95°F db / 75°F wb Outdoor Air	10.0 EER	AHRI 390	
SPVHP (Cooling Mode)	≥135,000 Btu/h and
<240,000 Btu/h	95°F db / 75°F wb Outdoor Air	10.0 EER	AHRI 390	
SPVHP (Heating Mode)	<65,000 Btu/h	47°F db / 43°F wb Outdoor Air	3.3 COP	AHRI 390	
SPVHP (Heating Mode)	≥65,000 Btu/h and
<135,000 Btu/h	47°F db / 43°F wb Outdoor Air	3.0 COP	AHRI 390	
SPVHP (Heating Mode)	≥135,000 Btu/h and
<240,000 Btu/h	47°F db / 43°F wb Outdoor Air	3.0 COP	AHRI 390	
a Cap means the rated cooling capacity of the product in Btu/h. If the unit’s capacity is less than 7000 Btu/h, use 7000 Btu/h in the calculation. If the unit’s capacity is greater than 15,000 Btu/h, use 15,000 Btu/h in the calculation.
b Replacement units must be factory labeled as follows: "MANUFACTURED FOR REPLACEMENT APPLICATIONS ONLY; NOT TO BE INSTALLED IN NEWLY CONSTRUCTED BUILDINGS." Replacement efficiencies apply only to units with existing sleeves less than 16 inches high or less than 42 inch wide and having a cross-sectional area less than 670 square inches.
c Applicable test procedure and reference year are provided under the definitions.

TABLE 110.2-F PERFORMANCE REQUIREMENTS FOR HEAT REJECTION EQUIPMENT
Equipment Type	Total System Heat Rejection Capacity at Rated Conditions	Subcategory or Rating Condition	Performance Required ,a ,b, c, d	Test Procedure e	
Propeller or axial fan Open-circuit cooling towers	All	95°F entering water 85°F leaving water 75°F entering air wb	≥ 42.1 gpm/hp	CTI ATC-105
and
CTI STD-201 RS	
Centrifugal fan Open-circuit cooling towers	All	95°F entering water 85°F leaving water 75°F entering air wb	≥ 20.0 gpm/hp	CTI ATC-105
and
CTI STD-201 RS	
Propeller or axial fan closed-circuit cooling towers	All	102°F entering water 90°F leaving water 75°F entering air wb	≥ 16.1 gpm/hp	CTI ATC-105S
and
CTI STD-201 RS	
Centrifugal fan closed-circuit cooling towers	All	102°F entering water 90°F leaving water 75°F entering air wb	≥ 7.0 gpm/hp	CTI ATC-105S
and
CTI STD-201 RS	
Propeller or axial fan evaporative condensers	All	R-448A test fluid 165⁰F entering gas temp
105⁰F condensing temp 75⁰F entering air wb	≥ 157,000
Btu/h • hp	CTI ATC-106	
Propeller or axial fan evaporative condensers	All	Ammonia test fluid 140⁰F entering gas temp
96.3⁰F condensing
temp
75⁰F entering air wb	≥ 134,000
Btu/h • hp	CTI ATC-106	
Centrifugal fan evaporative condensers	All	R-448A test fluid 165⁰F entering gas temp
105⁰F condensing temp 75⁰F entering air wb	≥ 135,000
Btu/h • hp	CTI ATC-106	

CONTINUED: TABLE 110.2-F PERFORMANCE REQUIREMENTS FOR HEAT REJECTION EQUIPMENT

Equipment Type	Total System Heat Rejection Capacity at Rated Conditions	Subcategory or Rating Condition	Performance Required ,a ,b, c, d	Test Procedure e	
Centrifugal fan evaporative condensers	All	Ammonia test fluid
140⁰F entering gas temp
96.3⁰F condensing temp 75⁰F entering air wb	≥ 110,000
Btu/h • hp	CTI ATC-106	
Air cooled condensers	All	125°F condensing temperature 190°F entering gas temperature
15°F subcooling
95°F entering drybulb	≥ 176,000 Btu/h · hp	AHRI 460	
Propeller or axial fan dry coolers (air-cooled fluid coolers)	All	115°F entering water 105°F leaving water 95°F entering air db	>4.5 gpm/hp	CTI ATC-105DS	
a For purposes of this table, open-circuit cooling tower performance is defined as the water flow rating of the tower at the given rated conditions divided by the fan motor nameplate power.
b For purposes of this table, closed-circuit cooling tower performance is defined as the process water flow rating of the tower at the given rated conditions divided by the sum of the fan motor nameplate rated power and the integral spray pump motor nameplate power.
c For purposes of this table dry cooler performance is defined as the process water flow rating of the unit at the given thermal rating condition divided by the total fan motor nameplate power of the unit and air-cooled condenser performance is defined as the heat rejected from the refrigerant divided by the fan motor nameplate power of the unit.
d Open cooling towers shall be tested using the test procedures in CTI ATC-105. Performance of factory assembled open cooling towers shall be either certified as base models as specified in CTI STD-201 or verified by testing in the field by a CTI approved testing agency. Open factory assembled cooling towers with custom options added to a CTI certified base model for the purpose of safe maintenance or to reduce environmental or noise impact shall be rated at 90 percent of the CTI certified performance of the associated base model or at the manufacturer’s stated performance, whichever is less. Base models of open factory assembled cooling towers are open cooling towers configured in exact accordance with the Data of Record submitted to CTI as specified by CTI STD-201. There are no certification requirements for field erected cooling towers.
e Applicable test procedure and reference year are provided under the definitions. For refrigerated warehouses or commercial refrigeration applications, condensers shall comply with requirements specified by Section 120.6(a) or Section 120.6(b).

TABLE 110.2-G Electrically Operated Variable Refrigerant Flow (VRF) Air Conditioners Minimum Efficiency Requirements
Equipment Type	Size Category	Heating Section Type	Sub-Category or Rating Condition	Minimum Efficiency	Test Procedurea	
VRF Air Conditioners, Air Cooled	<65,000 Btu/h	All	VRF Multi-split System	13.0 SEER	AHRI 1230	
VRF Air Conditioners, Air Cooled	≥65,000 Btu/h and
<135,000 Btu/h	Electric Resistance (or none)	VRF Multi-split System	11.2 EER

15.5 IEER b	AHRI 1230	
VRF Air Conditioners, Air Cooled	≥135,000 Btu/h
and <240,000
Btu/h	Electric Resistance (or none)	VRF Multi-split System	11.0 EER

14.9 IEER b	AHRI 1230	
VRF Air Conditioners, Air Cooled	≥240,000 Btu/h	Electric Resistance (or none)	VRF Multi-split System	10.0 EER

13.9 IEER b	AHRI 1230	
a Applicable test procedure and reference year are provided under the definitions.
b IEERs are only applicable to equipment with capacity control as specified by AHRI 1230 test procedures.

TABLE 110.2-H Electrically Operated Variable Refrigerant Flow Air-to-Air and Applied Heat Pumps - Minimum Efficiency Requirements
Equipment Type	Size Category	Heating Section Type	Sub-Category or Rating Condition	Minimum Efficiency	Test Procedure b	
VRF Air Cooled, (cooling mode)	<65,000 Btu/h	All	VRF Multi-split System	13.0 SEER	AHRI 1230	
VRF Air Cooled, (cooling mode)	≥65,000 Btu/h
and <135,000
Btu/h	Electric Resistance (or none)	VRF Multi-split System a	11.0 EER

14.6 IEER c	AHRI 1230	
VRF Air Cooled, (cooling mode)	≥135,000 Btu/h
and <240,000
Btu/h	Electric Resistance (or none)	VRF Multi-split System a	10.6 EER

13.9 IEER c	AHRI 1230	
VRF Air Cooled, (cooling mode)	≥240,000 Btu/h	Electric Resistance (or none)	VRF Multi-split System a	9.5 EER

12.7 IEER c	AHRI 1230	
VRF Water source (cooling mode)	<65,000 Btu/h	All	VRF Multi-split systems a
86ºF entering water	12.0 EER
16.0 IEER c	AHRI 1230	
VRF Water source (cooling mode)	≥65,000 Btu/h
and
<135,000 Btu/h	All	VRF Multi-split System a
86ºF entering water	12.0 EER
16.0 IEER c	AHRI 1230	
VRF Water source (cooling mode)	≥135,000 Btu/h
and < 240,000	All	VRF Multi-split System a
86ºF entering water	10.0 EER
14.0 IEER c	AHRI 1230	
VRF Water source (cooling mode)	≥ 240,000 Btu/h	All	VRF Multi-split Systema 86oF entering water	10.0 EER
12.0 IEER	AHRI 1230	

CONTINUED: TABLE 110.2-H Electrically Operated Variable Refrigerant Flow Air-to-Air and Applied Heat Pumps - Minimum Efficiency Requirements
Equipment Type	Size Category	Heating Section Type	Sub-Category or Rating Condition	Minimum Efficiency	Test Procedure b	
VRF Groundwater source (cooling mode)	<135,000 Btu/h	All	VRF Multi-split System a
59ºF entering water	16.2 EER	AHRI 1230	
VRF Groundwater source (cooling mode)	≥135,000 Btu/h	All	VRF Multi-split System a
59ºF entering water	13.8 EER	AHRI 1230	
VRF Ground source (cooling mode)	<135,000 Btu/h	All	VRF Multi-split System a
77ºF entering water	13.4 EER	AHRI 1230	
VRF Ground source (cooling mode)	≥135,000 Btu/h	All	VRF Multi-split System a
77ºF entering water	11.0 EER	AHRI 1230	
VRF Air Cooled (heating mode)	<65,000 Btu/h (cooling capacity)	---	VRF Multi-split System	7.7 HSPF	AHRI 1230	
VRF Air Cooled (heating mode)	≥65,000 Btu/h and
<135,000 Btu/h (cooling capacity)	---	VRF Multi-split system
47ºF db/ 43ºF wb outdoor air	3.3 COP	AHRI 1230	
VRF Air Cooled (heating mode)	≥65,000 Btu/h and
<135,000 Btu/h (cooling capacity)	---	VRF Multi-split system
17ºF db/15ºF wb outdoor air	2.25 COP	AHRI 1230	
VRF Air Cooled (heating mode)	≥135,000 Btu/h
(cooling capacity)	---	VRF Multi-split system
47ºF db/ 43ºF wb outdoor air	3.2 COP	AHRI 1230	

CONTINUED: TABLE 110.2-H Electrically Operated Variable Refrigerant Flow Air-to-Air and Applied Heat Pumps - Minimum Efficiency Requirements
Equipment Type	Size Category	Heating Section Type	Sub-Category or Rating Condition	Minimum Efficiency	Test Procedure b	
VRF Air Cooled (heating mode)	≥135,000 Btu/h
(cooling capacity)	---	VRF Multi-split system
17ºF db/15ºF wb outdoor air	2.05 COP	AHRI 1230	
VRF Water source (heating mode)	< 65,000 Btu/h (cooling capacity)	---	VRF Multi-split System 68oF entering water	4.3 COP	AHRI 1230	
VRF Water source (heating mode)	≥65,000 Btu/h and
<135,000 Btu/h
(cooling capacity)	---	VRF Multi-split System 68ºF entering water	

4.3 COP	AHRI 1230	
VRF Water source (heating mode)	≥135,000 Btu/h
and < 240,000
Btu/h
(cooling capacity)	---	VRF Multi-split System 68ºF entering water	

4.0 COP	AHRI 1230	
VRF Water source (heating mode)	≥ 240,000 Btu/h
(cooling capacity)	---	VRF Multi-split System 68oF entering water	3.9 COP	AHRI 1230	
VRF Groundwater source (heating mode)	<135,000 Btu/h (cooling capacity)	---	VRF Multi-split System 50ºF entering water	3.6 COP	AHRI 1230	
VRF Groundwater source (heating mode)	≥135,000 Btu/h
(cooling capacity)	---	VRF Multi-split System 50ºF entering water	3.3 COP	AHRI 1230	
VRF Ground source (heating mode)	<135,000 Btu/h (cooling capacity)	---	VRF Multi-split System 32ºF entering water	3.1 COP	AHRI 1230	
VRF Ground source (heating mode)	≥135,000 Btu/h
(cooling capacity)	---	VRF Multi-split System 32ºF entering water	2.8 COP	AHRI 1230	
Footnote for Table 110.2H
a Deduct 0.2 from the required EERs and IEERs for Variable Refrigerant Flow (VRF) Multi-split system units with a heating recovery section.
b Applicable test procedure and reference year are provided under the definitions.
c IEERs are only applicable to equipment with capacity control as specified by AHRI 1230 test procedures.

TABLE 110.2-I Warm-Air Furnaces and Combination Warm-Air Furnaces/Air-Conditioning Units, Warm-Air Duct Furnaces, and Unit Heaters
Equipment Type	Size Category (Input)	Subcategory or Rating Conditionb	Minimum Efficiencyd,e	Test Procedurea	
Warm-Air Furnace, Gas-Fired	≥ 225,000 Btu/h	Maximum Capacityb	81% Et	Section 2.39, Thermal Efficiency, ANSI Z21.47	
Warm-Air Furnace, oil-Fired	≥ 225,000 Btu/h	Maximum Capacityb	82% Et	Section 42, Combustion, UL 727	
Warm-Air Duct Furnaces, Gas-Fired	All Capacities	Maximum Capacityb	80% Ec	Section 2.10, Efficiency, ANSI Z83.8	
Warm-Air Unit Heaters, Gas-Fired	All Capacities	Maximum Capacityb	80% Ec	Section 2.10, Efficiency, ANSI Z83.8	
Warm-Air Unit Heaters, Oil-Fired	All Capacities	Maximum Capacityb	81% Ec	Section 40, Combustion, UL 731	
a Applicable test procedure and reference year are provided under the definitions.
b Compliance of multiple firing rate units shall be at maximum firing rate.
c Combustion units not covered by the U.S. Department of Energy Code of Federal Regulations 10 CFR 430 (3-phase power or cooling capacity greater than or equal to 19 kW) may comply with either rating.
d Et= thermal efficiency. Units must also include an interrupted or intermittent ignition device (IID), have jacket losses not exceeding 0.75% of the input rating, and have either power venting or a flue damper. A vent damper is an acceptable alternative to a flue damper for those furnaces where combustion air is drawn from the conditioned space.
e Ec= combustion efficiency (100% less flue losses). See test procedure for detailed discussion.
f As of August 8, 2008, according to the Energy Policy Act of 2005, units must also include interrupted or intermittent ignition device (IID) and have either power venting or an automatic flue damper.

TABLE 110.2-J Gas- and Oil-Fired Boilers, Minimum Efficiency Requirements
Equipment Type	Sub Category	Size Category (Input)	Minimum Efficiency b,c
Before 1/10/2023	Minimum Efficiency b,c
On or After 1/10/2023	Test Procedure a	
Boiler, hot water	Gas-Fired	< 300,000 Btu/h	82% AFUE	82% AFUE	DOE 10 CFR Part 430	
Boiler, hot water	Gas-Fired	≥ 300,000 Btu/h and
≤ 2,500,000 Btu/h d	80% Et	84% Et	DOE 10 CFR Part 431	
Boiler, hot water	Gas-Fired	> 2,500,000 Btu/h and
≤10,000,000 Btu/h	82% Ec	85% Ec	DOE 10 CFR Part 431	
Boiler, hot water	Gas-Fired	>10,000,000 Btu/h	82% Ec	82% Ec	DOE 10 CFR Part 431	
Boiler, hot water	Oil-Fired e	< 300,000 Btu/h	84% AFUE	84% AFUE	DOE 10 CFR Part 430	
Boiler, hot water	Oil-Fired e	≥ 300,000 Btu/h and
≤ 2,500,000 Btu/h d	82% Et	87% Et	DOE 10 CFR Part 431	
Boiler, hot water	Oil-Fired e	> 2,500,000 Btu/h and
≤10,000,000 Btu/h	84% Ec	88% Ec	DOE 10 CFR Part 431	
Boiler, hot water	Oil-Fired e	>10,000,000 Btu/h	84% Ec	84% Ec	DOE 10 CFR Part 431	
Boiler, steam	Gas-Fired	< 300,000 Btu/h	80% AFUE	80% AFUE	DOE 10 CFR Part 430	
Boiler, steam	Gas-Fired	≥ 300,000 Btu/h and
≤2,500,000 Btu/h		81% Et	DOE 10 CFR Part 431	
Boiler, steam	Gas-Fired	>2,500,000 Btu/h and
≤10,000,000 Btu/h		82% Et	DOE 10 CFR Part 431	
Boiler, steam	Gas-Fired	>10,000,000 Btu/h		79% Et	DOE 10 CFR Part 431	
Boiler, steam	Gas-Fired all, except natural draft f	≥ 300,000 Btu/h and
≤ 2,500,000 Btu/h d	79% Et	81% Et	DOE 10 CFR Part 431	
Boiler, steam	Gas-Fired all, except
natural draft f	> 2,500,000 Btu/h and
≤10,000,000 Btu/h	79% Et	82% Et	DOE 10 CFR Part 431	
Boiler, steam	Gas-Fired all, except
natural draft f	>10,000,000 Btu/h	79% Et	79% Et	DOE 10 CFR Part 431	
Boiler, steam	Gas-Fired, natural draft f	≥ 300,000 Btu/h and
≤ 2,500,000 Btu/h d	77% Et	81% Et	DOE 10 CFR Part 431	
Boiler, steam	Gas-Fired, natural draft f	> 2,500,000 Btu/h and
≤10,000,000 Btu/h	77% Et	82% Et	DOE 10 CFR Part 431	
Boiler, steam	Gas-Fired,
natural draft f	>10,000,000 Btu/h	77% Et	79% Et	DOE 10 CFR Part 431	
Boiler, steam	Oil-Fired e	< 300,000 Btu/h	82% AFUE	82% AFUE	DOE 10 CFR Part 430	
Boiler, steam	Oil-Fired e	≥ 300,000 Btu/h and
≤ 2,500,000 Btu/h d	81% Et	84% Et	DOE 10 CFR Part 431	
Boiler, steam	Oil-Fired e	> 2,500,000 Btu/h and
≤10,000,000 Btu/h	81% Et	85% Et	DOE 10 CFR Part 431	
Boiler, steam	Oil-Fired e	≥ 10,000,000 Btu/h	81% Et	81% Et	DOE 10 CFR Part 431	
Footnote for Table -110-2J:
a Applicable test procedure and reference year are provided under the definitions.
b Ec = combustion efficiency (100% less flue losses).See test procedure for detailed information.
c Et= thermal efficiency. See test procedure for detailed information.
d Maximum capacity - maximum rating per the certified unit capacity.
e Included oil-fired (residual).
f Federal efficiency standards do not distinguish between natural draft gas-fired steam boilers and other gas-fired steam boilers on or after January 10, 2023.

TABLE 110.2-K DX-DOAS Units, Single-Package and Remote Condenser – Minimum Efficiency Requirements

Equipment Type	Energy Recovery	Subcategory or Rating Condition	Minimum Efficiency	Test Procedurea	
Air cooled (dehumidification
mode)	Without energy recovery		4.0 ISMRE	AHRI 920	
Air source heat pumps (dehumidification
mode)	Without energy recovery		4.0 ISMRE	AHRI 920	
Water cooled (dehumidification
mode)	Without energy recovery	Cooling Tower Condenser Water	4.9 ISMRE	AHRI 920	
Water cooled (dehumidification
mode)	Without energy recovery	Chilled Water	6.0 ISMRE	AHRI 920	
Water source heat pump (dehumidification
mode)	Without energy recovery	Ground source, closed loop	4.8 ISMRE	AHRI 920	
Water source heat pump (dehumidification
mode)	Without energy recovery	Ground-water source	5.0 ISMRE	AHRI 920	
Water source heat pump (dehumidification
mode)	Without energy recovery	Water source	4.0 ISMRE	AHRI 920	
Air source heat pumps (heating mode)	Without energy recovery		2.7 ISCOP	AHRI 920	
Water source heat pump
(heating mode)	Without energy recovery	Ground source, closed loop	2.0 ISCOP	AHRI 920	
Water source heat pump
(heating mode)	Without energy recovery	Ground-water source	3.2 ISCOP	AHRI 920	
Water source heat pump
(heating mode)	Without energy recovery	Water source	3.5 ISCOP	AHRI 920	
Air cooled (dehumidification
mode)	With energy recovery		5.2 ISMRE	AHRI 920	
Air source heat pumps (dehumidification
mode)	With energy recovery		5.2 ISMRE	AHRI 920	

CONTINUED: TABLE 110.2-K DX-DOAS Units, Single-Package and Remote Condenser – Minimum Efficiency Requirements

Equipment Type	Energy Recovery	Subcategory or Rating Condition	Minimum Efficiency	Test Procedurea	
Water cooled (dehumidification
mode)	With energy recovery	Cooling tower condenser water	5.3 ISMRE	AHRI 920	
Water cooled (dehumidification mode)	With energy recovery	Chilled water	6.6 ISMRE	AHRI 920	
Water source heat pump (dehumidification
mode)	With energy recovery	Ground source, closed loop	5.2 ISMRE	AHRI 920	
Water source heat pump (dehumidification
mode)	With energy recovery	Ground-water source	5.8 ISMRE	AHRI 920	
Water source heat pump (dehumidification
mode)	With energy recovery	Water source	4.8 ISMRE	AHRI 920	
Air source heat pumps (heating mode)	With energy recovery		3.3 ISCOP	AHRI 920	
Water source heat pump
(heating mode)	With energy recovery	Ground source, closed loop	3.8 ISCOP	AHRI 920	
Water source heat pump
(heating mode)	With energy recovery	Ground-water source	4.0 ISCOP	AHRI 920	
Water source heat pump
(heating mode)	With energy recovery	Water source	4.8 ISCOP	AHRI 920	
Footnote to TABLE 110.2-K:
a Applicable test procedure and reference year are provided under the definitions.

TABLE 110.2-L Floor-Mounted Air Conditioners and Condensing Units Serving Computer Rooms – Minimum Efficiency Requirements

Equipment Type	Standard Model	Net Sensible Cooling Capacity	Minimum Net Sensible COP	Rating Conditions Return air (dry bulb/dew point)	Test Procedurea	
Air Cooled	Downflow	< 80,000 Btu/h	2.70	85°F / 52°F (Class 2)	AHRI 1360	
Air Cooled	Downflow	≥ 80,000 Btu/h and
< 295,000 Btu/h	2.58	85°F / 52°F (Class 2)	AHRI 1360	
Air Cooled	Downflow	≥ 295,000 Btu/h	2.36	85°F / 52°F (Class 2)	AHRI 1360	
Air Cooled	Upflow - ducted	< 80,000 Btu/h	2.67	85°F / 52°F (Class 2)	AHRI 1360	
Air Cooled	Upflow - ducted	≥ 80,000 Btu/h and
< 295,000 Btu/h	2.55	85°F / 52°F (Class 2)	AHRI 1360	
Air Cooled	Upflow - ducted	≥ 295,000 Btu/h	2.33	85°F / 52°F (Class 2)	AHRI 1360	
Air Cooled	Upflow - nonducted	< 65,000 Btu/h	2.16	75°F / 52°F (Class 1)	AHRI 1360	
Air Cooled	Upflow - nonducted	≥ 65,000 Btu/h and
< 240,000 Btu/h	2.04	75°F / 52°F (Class 1)	AHRI 1360	
Air Cooled	Upflow - nonducted	≥ 240,000 Btu/h	1.89	75°F / 52°F (Class 1)	AHRI 1360	
Air Cooled	Horizontal	< 65,000 Btu/h	2.65	95°F / 52°F (Class 3)	AHRI 1360	
Air Cooled	Horizontal	≥ 65,000 Btu/h and
< 240,000 Btu/h	2.55	95°F / 52°F (Class 3)	AHRI 1360	
Air Cooled	Horizontal	≥ 240,000 Btu/h	2.47	95°F / 52°F (Class 3)	AHRI 1360	
Air cooled with fluid economizer	Downflow	< 80,000 Btu/h	2.70	85°F / 52°F (Class 2)	AHRI 1360	
Air cooled with fluid economizer	Downflow	≥ 80,000 Btu/h and
< 295,000 Btu/h	2.58	85°F / 52°F (Class 2)	AHRI 1360	
Air cooled with fluid economizer	Downflow	≥ 295,000 Btu/h	2.36	85°F / 52°F (Class 2)	AHRI 1360	
Air cooled with fluid economizer	Upflow - ducted	< 80,000 Btu/h	2.67	85°F / 52°F (Class 2)	AHRI 1360	
Air cooled with fluid economizer	Upflow - ducted	≥ 80,000 Btu/h and
< 295,000 Btu/h	2.55	85°F / 52°F (Class 2)	AHRI 1360	
Air cooled with fluid economizer	Upflow - ducted	≥ 295,000 Btu/h	2.33	85°F / 52°F (Class 2)	AHRI 1360	
Air cooled with fluid economizer	Upflow - nonducted	< 65,000 Btu/h	2.09	75°F / 52°F (Class 1)	AHRI 1360	
Air cooled with fluid economizer	Upflow - nonducted	≥ 65,000 Btu/h and
< 240,000 Btu/h	1.99	75°F / 52°F (Class 1)	AHRI 1360	
Air cooled with fluid economizer	Upflow - nonducted	≥ 240,000 Btu/h	1.81	75°F / 52°F (Class 1)	AHRI 1360	
Air cooled with fluid economizer	Horizontal	< 65,000 Btu/h	2.65	95°F / 52°F (Class 3)	AHRI 1360	

Air cooled with fluid economizer	Horizontal	≥ 65,000 Btu/h and
< 240,000 Btu/h	2.55	95°F / 52°F (Class 3)	AHRI 1360	
Air cooled with fluid economizer	Horizontal	≥ 240,000 Btu/h	2.47	95°F / 52°F (Class 3)	AHRI 1360	
Water cooled	Downflow	< 80,000 Btu/h	2.82	85°F / 52°F (Class 2)	AHRI 1360	
Water cooled	Downflow	≥ 80,000 Btu/h and
< 295,000 Btu/h	2.73	85°F / 52°F (Class 2)	AHRI 1360	
Water cooled	Downflow	≥ 295,000 Btu/h	2.67	85°F / 52°F (Class 2)	AHRI 1360	
Water cooled	Upflow - ducted	< 80,000 Btu/h	2.79	85°F / 52°F (Class 2)	AHRI 1360	
Water cooled	Upflow - ducted	≥ 80,000 Btu/h and
< 295,000 Btu/h	2.70	85°F / 52°F (Class 2)	AHRI 1360	
Water cooled	Upflow - ducted	≥ 295,000 Btu/h	2.64	85°F / 52°F (Class 2)	AHRI 1360	
Water cooled	Upflow - nonducted	< 65,000 Btu/h	2.43	75°F / 52°F (Class 1)	AHRI 1360	
Water cooled	Upflow - nonducted	≥ 65,000 Btu/h and
< 240,000 Btu/h	2.32	75°F / 52°F (Class 1)	AHRI 1360	
Water cooled	Upflow - nonducted	≥ 240,000 Btu/h	2.20	75°F / 52°F (Class 1)	AHRI 1360	
Water cooled	Horizontal	< 65,000 Btu/h	2.79	95°F / 52°F (Class 3)	AHRI 1360	
Water cooled	Horizontal	≥ 65,000 Btu/h and
< 240,000 Btu/h	2.68	95°F / 52°F (Class 3)	AHRI 1360	
Water cooled	Horizontal	≥ 240,000 Btu/h	2.60	95°F / 52°F (Class 3)	AHRI 1360	

Water cooled with fluid economizer	Downflow	< 80,000 Btu/h	2.77	85°F / 52°F (Class 2)	AHRI 1360	
Water cooled with fluid economizer	Downflow	≥ 80,000 Btu/h and
< 295,000 Btu/h	2.68	85°F / 52°F (Class 2)	AHRI 1360	
Water cooled with fluid economizer	Downflow	≥ 295,000 Btu/h	2.61	85°F / 52°F (Class 2)	AHRI 1360	
Water cooled with fluid economizer	Upflow - ducted	< 80,000 Btu/h	2.74	85°F / 52°F (Class 2)	AHRI 1360	
Water cooled with fluid economizer	Upflow - ducted	≥ 80,000 Btu/h and
< 295,000 Btu/h	2.65	85°F / 52°F (Class 2)	AHRI 1360	
Water cooled with fluid economizer	Upflow - ducted	≥ 295,000 Btu/h	2.58	85°F / 52°F (Class 2)	AHRI 1360	
Water cooled with fluid economizer	Upflow - nonducted	< 65,000 Btu/h	2.35	75°F / 52°F (Class 1)	AHRI 1360	
Water cooled with fluid economizer	Upflow - nonducted	≥ 65,000 Btu/h and
< 240,000 Btu/h	2.24	75°F / 52°F (Class 1)	AHRI 1360	
Water cooled with fluid economizer	Upflow - nonducted	≥ 240,000 Btu/h	2.12	75°F / 52°F (Class 1)	AHRI 1360	
Water cooled with fluid economizer	Horizontal	< 65,000 Btu/h	2.71	95°F / 52°F (Class 3)	AHRI 1360	
Water cooled with fluid economizer	Horizontal	≥ 65,000 Btu/h and
< 240,000 Btu/h	2.60	95°F / 52°F (Class 3)	AHRI 1360	
Water cooled with fluid economizer	Horizontal	≥ 240,000 Btu/h	2.54	95°F / 52°F (Class 3)	AHRI 1360	
Glycol cooled	Downflow	< 80,000 Btu/h	2.56	85°F / 52°F (Class 2)	AHRI 1360	
Glycol cooled	Downflow	≥ 80,000 Btu/h and
< 295,000 Btu/h	2.24	85°F / 52°F (Class 2)	AHRI 1360	

Glycol cooled	Downflow	≥ 295,000 Btu/h	2.21	85°F / 52°F (Class 2)	AHRI 1360	
Glycol cooled	Upflow - ducted	< 80,000 Btu/h	2.53	85°F / 52°F (Class 2)	AHRI 1360	
Glycol cooled	Upflow - ducted	≥ 80,000 Btu/h and
< 295,000 Btu/h	2.21	85°F / 52°F (Class 2)	AHRI 1360	
Glycol cooled	Upflow - ducted	≥ 295,000 Btu/h	2.18	85°F / 52°F (Class 2)	AHRI 1360	
Glycol cooled	Upflow - nonducted	< 65,000 Btu/h	2.08	75°F / 52°F (Class 1)	AHRI 1360	
Glycol cooled	Upflow - nonducted	≥ 65,000 Btu/h and
< 240,000 Btu/h	1.90	75°F / 52°F (Class 1)	AHRI 1360	
Glycol cooled	Upflow - nonducted	≥ 240,000 Btu/h	1.81	75°F / 52°F (Class 1)	AHRI 1360	
Glycol cooled with fluid economizer	Horizontal	< 65,000 Btu/h	2.48	95°F / 52°F (Class 3)	AHRI 1360	
Glycol cooled with fluid economizer	Horizontal	≥ 65,000 Btu/h and
< 240,000 Btu/h	2.18	95°F / 52°F (Class 3)	AHRI 1360	
Glycol cooled with fluid economizer	Horizontal	≥ 240,000 Btu/h	2.18	95°F / 52°F (Class 3)	AHRI 1360	
Glycol cooled with fluid economizer	Downflow	< 80,000 Btu/h	2.51	85°F / 52°F (Class 2)	AHRI 1360	
Glycol cooled with fluid economizer	Downflow	≥ 80,000 Btu/h and
< 295,000 Btu/h	2.19	85°F / 52°F (Class 2)	AHRI 1360	
Glycol cooled with fluid economizer	Downflow	≥ 295,000 Btu/h	2.15	85°F / 52°F (Class 2)	AHRI 1360	
Glycol cooled with fluid economizer	Upflow - ducted	< 80,000 Btu/h	2.48	85°F / 52°F (Class 2)	AHRI 1360	

Glycol cooled with fluid economizer	Upflow - ducted	≥ 80,000 Btu/h and
< 295,000 Btu/h	2.16	85°F / 52°F (Class 2)	AHRI 1360	
Glycol cooled with fluid economizer	Upflow - ducted	≥ 295,000 Btu/h	2.12	85°F / 52°F (Class 2)	AHRI 1360	
Glycol cooled with fluid economizer	Upflow - nonducted	< 65,000 Btu/h	2.00	75°F / 52°F (Class 1)	AHRI 1360	
Glycol cooled with fluid economizer	Upflow - nonducted	≥ 65,000 Btu/h and
< 240,000 Btu/h	1.82	75°F / 52°F (Class 1)	AHRI 1360	
Glycol cooled with fluid economizer	Upflow - nonducted	≥ 240,000 Btu/h	1.73	75°F / 52°F (Class 1)	AHRI 1360	
Glycol cooled with fluid economizer	Horizontal	< 65,000 Btu/h	2.44	95°F / 52°F (Class 3)	AHRI 1360	
Glycol cooled with fluid economizer	Horizontal	≥ 65,000 Btu/h and
< 240,000 Btu/h	2.10	95°F / 52°F (Class 3)	AHRI 1360	
Glycol cooled with fluid economizer	Horizontal	≥ 240,000 Btu/h	2.10	95°F / 52°F (Class 3)	AHRI 1360	
a Applicable test procedure and reference year are provided under the definitions.

TABLE 110.2-M Ceiling-Mounted Air Conditioners and Condensing Units Serving Computer Rooms – Minimum Efficiency Requirements

Equipment Type	Standard Model	Net Sensible Cooling Capacity	Minimum Net Sensible COP	Rating Conditions Return air
(dry bulb/dew point)	Test Procedurea	
Air Cooled with free air discharge
condenser	Ducted	< 29,000 Btu/h	2.05	75°F / 52°F (Class 1)	AHRI 1360	
Air Cooled with free air discharge
condenser	Ducted	≥ 29,000 Btu/h and
< 65,000 Btu/h	2.02	75°F / 52°F (Class 1)	AHRI 1360	
Air Cooled with free air discharge
condenser	Ducted	≥ 65,000 Btu/h	1.92	75°F / 52°F (Class 1)	AHRI 1360	
Air Cooled with free air discharge
condenser	Nonducted	< 29,000 Btu/h	2.08	75°F / 52°F (Class 1)	AHRI 1360	
Air Cooled with free air discharge
condenser	Nonducted	≥ 29,000 Btu/h and
< 65,000 Btu/h	2.05	75°F / 52°F (Class 1)	AHRI 1360	
Air Cooled with free air discharge
condenser	Nonducted	≥ 65,000 Btu/h	1.94	75°F / 52°F (Class 1)	AHRI 1360	
Air Cooled with free air discharge condenser with
fluid economizer	Ducted	< 29,000 Btu/h	2.01	75°F / 52°F (Class 1)	AHRI 1360	
Air Cooled with free air discharge condenser with
fluid economizer	Ducted	≥ 29,000 Btu/h and
< 65,000 Btu/h	1.97	75°F / 52°F (Class 1)	AHRI 1360	
Air Cooled with free air discharge condenser with
fluid economizer	Ducted	≥ 65,000 Btu/h	1.87	75°F / 52°F (Class 1)	AHRI 1360	
Air Cooled with free air discharge condenser with
fluid economizer	Nonducted	< 29,000 Btu/h	2.04	75°F / 52°F (Class 1)	AHRI 1360	
Air Cooled with free air discharge condenser with
fluid economizer	Nonducted	≥ 29,000 Btu/h and
< 65,000 Btu/h	2.00	75°F / 52°F (Class 1)	AHRI 1360	
Air Cooled with free air discharge condenser with
fluid economizer	Nonducted	≥ 65,000 Btu/h	1.89	75°F / 52°F (Class 1)	AHRI 1360	
Air cooled with ducted condenser	Ducted	< 29,000 Btu/h	1.86	75°F / 52°F (Class 1)	AHRI 1360	

Air cooled with ducted condenser	Ducted	≥ 29,000 Btu/h and
< 65,000 Btu/h	1.83	75°F / 52°F (Class 1)	AHRI 1360	
Air cooled with ducted condenser	Ducted	≥ 65,000 Btu/h	1.73	75°F / 52°F (Class 1)	AHRI 1360	
Air cooled with ducted condenser	Nonducted	< 29,000 Btu/h	1.89	75°F / 52°F (Class 1)	AHRI 1360	
Air cooled with ducted condenser	Nonducted	≥ 29,000 Btu/h and
< 65,000 Btu/h	1.86	75°F / 52°F (Class 1)	AHRI 1360	
Air cooled with ducted condenser	Nonducted	≥ 65,000 Btu/h	1.75	75°F / 52°F (Class 1)	AHRI 1360	
Air cooled with fluid economizer and ducted
condenser	Ducted	< 29,000 Btu/h	1.82	75°F / 52°F (Class 1)	AHRI 1360	
Air cooled with fluid economizer and ducted
condenser	Ducted	≥ 29,000 Btu/h and
< 65,000 Btu/h	1.78	75°F / 52°F (Class 1)	AHRI 1360	
Air cooled with fluid economizer and ducted
condenser	Ducted	≥ 65,000 Btu/h	1.68	75°F / 52°F (Class 1)	AHRI 1360	
Air cooled with fluid economizer and ducted
condenser	Nonducted	< 29,000 Btu/h	1.85	75°F / 52°F (Class 1)	AHRI 1360	
Air cooled with fluid economizer and ducted
condenser	Nonducted	≥ 29,000 Btu/h and
< 65,000 Btu/h	1.81	75°F / 52°F (Class 1)	AHRI 1360	
Air cooled with fluid economizer and ducted
condenser	Nonducted	≥ 65,000 Btu/h	1.70	75°F / 52°F (Class 1)	AHRI 1360	
Water cooled	Ducted	< 29,000 Btu/h	2.38	75°F / 52°F (Class 1)	AHRI 1360	
Water cooled	Ducted	≥ 29,000 Btu/h and
< 65,000 Btu/h	2.38	75°F / 52°F (Class 1)	AHRI 1360	
Water cooled	Ducted	≥ 65,000 Btu/h	2.18	75°F / 52°F (Class 1)	AHRI 1360	
Water cooled	Nonducted	< 29,000 Btu/h	2.41	75°F / 52°F (Class 1)	AHRI 1360	

Water cooled	Nonducted	≥ 29,000 Btu/h and
< 65,000 Btu/h	2.31	75°F / 52°F (Class 1)	AHRI 1360	
Water cooled	Nonducted	≥ 65,000 Btu/h	2.20	75°F / 52°F (Class 1)	AHRI 1360	
Water cooled with fluid economizer	Ducted	< 29,000 Btu/h	2.33	75°F / 52°F (Class 1)	AHRI 1360	
Water cooled with fluid economizer	Ducted	≥ 29,000 Btu/h and
< 65,000 Btu/h	2.23	75°F / 52°F (Class 1)	AHRI 1360	
Water cooled with fluid economizer	Ducted	≥ 65,000 Btu/h	2.13	75°F / 52°F (Class 1)	AHRI 1360	
Water cooled with fluid economizer	Nonducted	< 29,000 Btu/h	2.36	75°F / 52°F (Class 1)	AHRI 1360	
Water cooled with fluid economizer	Nonducted	≥ 29,000 Btu/h and
< 65,000 Btu/h	2.26	75°F / 52°F (Class 1)	AHRI 1360	
Water cooled with fluid economizer	Nonducted	≥ 65,000 Btu/h	2.16	75°F / 52°F (Class 1)	AHRI 1360	
Glycol cooled	Ducted	< 29,000 Btu/h	1.97	75°F / 52°F (Class 1)	AHRI 1360	
Glycol cooled	Ducted	≥ 29,000 Btu/h and
< 65,000 Btu/h	1.93	75°F / 52°F (Class 1)	AHRI 1360	
Glycol cooled	Ducted	≥ 65,000 Btu/h	1.78	75°F / 52°F (Class 1)	AHRI 1360	
Glycol cooled	Nonducted	< 29,000 Btu/h	2.00	75°F / 52°F (Class 1)	AHRI 1360	
Glycol cooled	Nonducted	≥ 29,000 Btu/h and
< 65,000 Btu/h	1.98	75°F / 52°F (Class 1)	AHRI 1360	
Glycol cooled	Nonducted	≥ 65,000 Btu/h	1.81	75°F / 52°F (Class 1)	AHRI 1360	

Glycol cooled with fluid economizer	Ducted	< 29,000 Btu/h	1.92	75°F / 52°F (Class 1)	AHRI 1360	
Glycol cooled with fluid economizer	Ducted	≥ 29,000 Btu/h and
< 65,000 Btu/h	1.88	75°F / 52°F (Class 1)	AHRI 1360	
Glycol cooled with fluid economizer	Ducted	≥ 65,000 Btu/h	1.73	75°F / 52°F (Class 1)	AHRI 1360	
Glycol cooled with fluid economizer	Nonducted	< 29,000 Btu/h	1.95	75°F / 52°F (Class 1)	AHRI 1360	
Glycol cooled with fluid economizer	Nonducted	≥ 29,000 Btu/h and
< 65,000 Btu/h	1.93	75°F / 52°F (Class 1)	AHRI 1360	
Glycol cooled with fluid economizer	Nonducted	≥ 65,000 Btu/h	1.76	75°F / 52°F (Class 1)	AHRI 1360	
a Applicable test procedure and reference year are provided under the definitions.

TABLE 110.2-N Heat Pump and Heat Recovery Chiller Packages – Minimum Efficiency Requirements

Equipment Type	Size Category, (tons)	Cooling-Only Operation Cooling Efficiency a
Full Load Efficiency (EER orkW/ton)
IPLV (EER or kW/ton)	Heating Operation	Test Procedure	
			Heating Source Conditions d,e	Heat-Pump Heating Full-Load Efficiency (COPH)b	Heat Recovery Chiller Full-Load Efficiency (COPHR)b, c
Simultaneous Cooling and Heating Full-Load Efficiency (COPSHC)b		
				Leaving Heating Water Temperature	Leaving Heating Water Temperature		
				Low	Medium	High	Boost	Low	Medium	High	Boost		
		Path A	Path B		105°F	120°F	140°F	140°F	105°F	120°F	140°F	140°F		
Air source	All sizes	≥9.595 EER
≥13.02 IPLV	≥9.215 EER
≥15.01 IPLV	47°F d / 43°F d	≥ 3.290	≥2.770	≥2.310	NA	NA	NA	NA	NA	AHRI 550/590	
		≥9.595 EER
≥13.30 IPLV	≥9.215 EER
≥15.30 IPLV	17°F d / 15°F d	≥2.230	≥1.950	≥1.630	NA	NA	NA	NA	NA		
Water source electrically operated positive displacement	<75	≤0.7885
kW/ton
≤0.6316 IPLV	≤0.7875
kW/ton
≤0.5145 IPLV	54°F e / 44°F e	≥4.640	≥3.680	≥2.680	NA	≥8.330	≥6.410	≥4.420	NA	AHRI 550/590	
				75°F e / 65°F e	NA	NA	NA	≥3.550	NA	NA	NA	≥6.150		
	≥75 and
<150	≤0.7579
kW/ton
≤0.5895 IPLV	≤0.7140
kW/ton
≤0.4620 IPLV	54°F e / 44°F e	≥4.640	≥3.680	≥2.680	NA	≥8.330	≥6.410	≥4.420	NA		
				75°F e / 65°F e	NA	NA	NA	≥3.550	NA	NA	NA	≥6.150		
	≥150 and
<300	≤0.6947
kW/ton
≤0.5684 IPLV	≤0.7140
kW/ton
≤0.4620 IPLV	54°F e / 44°F e	≥4.640	≥3.680	≥2.680	NA	≥8.330	≥6.410	≥4.420	NA		
				75°F e / 65°F e	NA	NA	NA	≥3.550	NA	NA	NA	≥6.150		
	≥300 and
<600	≤0.6421
kW/ton
≤0.5474 IPLV	≤0.6563
kW/ton
≤0.4305 IPLV	54°F e / 44°F e	≥4.930	≥3.960	≥2.970	NA	≥8.900	≥6.980	≥5.000	NA		
				75°F e / 65°F e	NA	NA	NA	≥3.900	NA	NA	NA	≥6.850		
	≥600	≤0.5895
kW/ton
≤0.5263 IPLV	≤0.6143
kW/ton
≤0.3990 IPLV	54°F e / 44°F e	≥4.930	≥3.960	≥2.970	NA	≥8.900	≥6.980	≥5.000	NA		
				75°F e / 65°F e	NA	NA	NA	≥3.900	NA	NA	NA	≥6.850		

Water source electrically operated centrifugal	<75	≤0.6421
kW/ton
≤0.5789 IPLV	≤0.7316
kW/ton
≤0.4632 IPLV	54°F e / 44°F e	≥4.640	≥3.680	≥2.680	NA	≥8.330	≥6.410	≥4.420	NA	AHRI 550/590	
				75°F e / 65°F e	NA	NA	NA	≥3.550	NA	NA	NA	≥6.150		
	≥75 and
<150	≤0.5895
kW/ton
≤0.5474 IPLV	≤0.6684
kW/ton
≤0.4211 IPLV	54°F e / 44°F e	≥4.640	≥3.680	≥2.680	NA	≥8.330	≥6.410	≥4.420	NA		
				75°F e / 65°F e	NA	NA	NA	≥3.550	NA	NA	NA	≥6.150		
	≥150 and
<300	≤0.5895
kW/ton
≤0.5263 IPLV	≤0.6263
kW/ton
≤0.4105 IPLV	54°F e / 44°F e	≥4.640	≥3.680	≥2.680	NA	≥8.330	≥6.410	≥4.420	NA		
				75°F e / 65°F e	NA	NA	NA	≥3.550	NA	NA	NA	≥6.150		
	≥300 and
<600	≤0.5895
kW/ton
≤0.5263 IPLV	≤0.6158
kW/ton
≤0.4000 IPLV	54°F e / 44°F e	≥4.930	≥3.960	≥2.970	NA	≥8.900	≥6.980	≥5.000	NA		
				75°F e / 65°F e	NA	NA	NA	≥3.900	NA	NA	NA	≥6.850		
	≥600	≤0.5895
kW/ton
≤0.5263 IPLV	≤0.6158
kW/ton
≤0.4000 IPLV	54°F e / 44°F e	≥4.930	≥3.960	≥2.970	NA	≥8.900	≥6.980	≥5.000	NA		
				75°F e / 65°F e	NA	NA	NA	≥3.900	NA	NA	NA	≥6.850		
Cooling-only rating conditions are standard rating conditions defined in AHRI550/590, Table 1.
Heating full-load rating conditions are at rating conditions defined in AHRI550/590, Table1.
For water-cooled heat recovery chillers that have capabilities for heat rejection to a heat recovery condenser and a tower condenser, the COP applies to operation at full load with 100% heat recovery (no tower rejection). Units that only have capabilities for partial heat recovery shall meet the requirements of Table 110.2-D
Outdoor air entering dry-bulb (db) temperature and wet-bulb (wb) temperature.
Source-water entering and leaving water temperature.	
NOTE: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections 25007, 25008, 25218.5, 25310, 25402, 25402.1,
25402.4, 25402.8, and 25943, Public Resources Code

SECTION 110.3 – MANDATORY REQUIREMENTS FOR SERVICE WATER-HEATING SYSTEMS AND EQUIPMENT
Certification by manufacturers. Any service water- heating system or equipment may be installed only if the manufacturer has certified that the system or equipment complies with all of the requirements of this subsection for that system or equipment.
Temperature controls for service water-heating systems. Service water-heating systems shall be equipped with automatic temperature controls capable of adjustment from the lowest to the highest acceptable temperature settings for the intended use as listed in Table 3, Chapter 50 of the ASHRAE Handbook, HVAC Applications Volume or Table 613.1 of the California Plumbing Code for healthcare facilities.
Exception to Section 110.3(a)1: Residential occupancies.
Efficiency. Equipment shall meet the applicable requirements of the Appliance Efficiency Regulations as required by Section 110.1, subject to the following:
If more than one standard is listed in the Appliance Efficiency Regulations, the equipment shall meet all the standards listed; and
If more than one test method is listed in the Appliance Efficiency Regulations, the equipment shall comply with the applicable standard when tested with each test method; and
Where equipment can serve more than one function, such as both heating and cooling, or both space heating and water heating, it shall comply with all the requirements applicable to each function; and
Where a requirement is for equipment rated at its “maximum rated capacity” or “minimum rated capacity,” the capacity shall be as provided for and allowed by the controls, during steady-state operation.
Installation. Any service water-heating system or equipment may be installed only if the system or equipment complies with all of the applicable requirements of this subsection for the system or equipment.
Outlet temperature controls. On systems that have a total capacity greater than 167,000 Btu/hr, outlets that require higher than service water temperatures as listed in the ASHRAE Handbook, Applications Volume, shall have separate remote heaters, heat exchangers or boosters to supply the outlet with the higher temperature.
Exception to Section 110.3(c)1: Systems covered by California Plumbing Code Section 613.0 shall instead follow the requirements of that section.
Controls for hot water distribution systems. Service hot water systems with circulating pumps or with electrical heat trace systems shall be capable of automatically turning off the system.
Exception to Section 110.3(c)2: Systems serving healthcare facilities.

Insulation. Unfired service water heater storage tanks and backup tanks for solar water-heating systems shall have:
External insulation with an installed R-value of at least R-3.5; or
Internal and external insulation with a combined R-value of at least R-16; or
The heat loss of the tank surface based on an 80°F water-air temperature difference shall be less than
6.5 Btu per hour per square foot.
Water heating recirculation loops serving multiple dwelling units, high-rise residential, hotel/motel, and nonresidential occupancies. A water heating recirculation loop is a type of hot water distribution system that reduces the time needed to deliver hot water to fixtures that are distant from the water heater, boiler or other water heating equipment. The recirculation loop is comprised of a supply portion, connected to

branches that serve multiple dwelling units, guest rooms, or fixtures and a return portion that completes the loop back to the water heating equipment. A water heating recirculation loop shall meet the following requirements:
Air release valve or vertical pump installation. An automatic air release valve shall be installed on the recirculation loop piping on the inlet side of the recirculation pump and no more than 4 feet from the pump. This valve shall be mounted on top of a vertical riser at least 12 inches in length and shall be accessible for replacement and repair. Alternatively, the pump shall be installed on a vertical section of the return line.
Recirculation loop backflow prevention. A check valve or similar device shall be located between the recirculation pump and the water heating equipment to prevent water from flowing backwards though the recirculation loop.
Equipment for pump priming. A hose bibb shall be installed between the pump and the water heating equipment. An isolation valve shall be installed between the hose bibb and the water heating equipment. This hose bibb is used for bleeding air out of the pump after pump replacement.
Pump isolation valves. Isolation valves shall be installed on both sides of the pump. These valves may be part of the flange that attaches the pump to the pipe. One of the isolation valves may be the same isolation valve as in Item C.
Cold water supply and recirculation loop connection to hot water storage tank. Storage water heaters and boilers shall be plumbed in accordance with the manufacturer’s specifications The cold water piping and the recirculation loop piping shall not be connected to the hot water storage tank drain port.
Cold water supply backflow prevention. A check valve shall be installed on the cold water supply line between the hot water system and the next closest tee on the cold water supply line. The system shall comply with the expansion tank requirements as described in the California Plumbing Code Section 608.3.
Service water heaters in state buildings. Any newly constructed building constructed by the State shall derive its service water heating from a system that provides at least 60 percent of the energy needed for service water heating from site solar energy or recovered energy, per the statutory requirement of California Public Resources Code Section 25498.
Exception to Section 110.3(c)5: Buildings for which the state architect determines that service water heating from site solar energy or recovered energy is economically or physically infeasible.
Isolation valves. Instantaneous water heaters with an input rating greater than 6.8 kBTU/hr (2 kW) shall have isolation valves on both the cold water supply and the hot water pipe leaving the water heater, and hose bibbs or other fittings on each valve for flushing the water heater when the valves are closed.
Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.8, and 25943, Public Resources Code

SECTION 110.4 – MANDATORY REQUIREMENTS FOR POOL AND SPA SYSTEMS AND EQUIPMENT
Certification by manufacturers. Any pool or spa heating system or equipment may be installed only if the manufacturer has certified that the system or equipment has all of the following:
Efficiency. For equipment subject to State or federal appliance efficiency standards, listings in the Commission’s directory of certified equipment showing compliance with applicable standards; and
On-off switch. A readily accessible on-off switch, mounted on the outside of the heater that allows shutting off the heater without adjusting the thermostat setting; and
Instructions. A permanent, easily readable and weatherproof plate or card that gives instruction for the energy efficient operation of the pool or spa heater and for the proper care of pool or spa water when a cover is used; and
Electric resistance heating. No electric resistance heating.
Exception 1 to Section 110.4(a)4: Listed package units with fully insulated enclosures, and with tight- fitting covers that are insulated to at least R-6.
Exception 2 to Section 110.4(a)4: Pools or spas deriving at least 60 percent of the annual heating energy from site solar energy or recovered energy.
Installation. Any pool or spa system or equipment shall be installed with all of the following:
Piping. At least 36 inches of pipe shall be installed between the filter and the heater or dedicated suction and return lines, or built-in or built-up connections shall be installed to allow for the future addition of solar heating equipment;
Covers. A cover for outdoor pools or outdoor spas that have a heat pump or gas heater; and
Directional inlets and time switches for pools. If the system or equipment is for a pool:
The pool shall have directional inlets that adequately mix the pool water; and
A time switch or similar control mechanism shall be installed as part of a pool water circulation control system that will allow all pumps to be set or programmed to run only during off-peak electric demand period, and for the minimum time necessary to maintain the water in the condition required by applicable public health standards.

SECTION 110.5 – NATURAL GAS CENTRAL FURNACES, COOKING EQUIPMENT, POOL AND SPA HEATERS, AND FIREPLACES: PILOT LIGHTS PROHIBITED
Any natural gas system or equipment listed below may be installed only if it does not have a continuously burning pilot light:
Fan-type central furnaces.
Household cooking appliances.
Exception to Section 110.5(b): Household cooking appliances without an electrical supply voltage connection and in which each pilot consumes less than 150 Btu/hr.
Pool heaters.
Spa heaters.
Indoor and outdoor fireplaces.
Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.8, and 25943, Public Resources Code.

SECTION 110.5 – NATURAL GAS CENTRAL FURNACES, COOKING EQUIPMENT, POOL AND SPA HEATERS, AND

SECTION 110.6 – MANDATORY REQUIREMENTS FOR FENESTRATION PRODUCTS AND EXTERIOR DOORS
Certification of fenestration products and exterior doors other than field-fabricated. Any fenestration product and exterior door, other than field-fabricated fenestration products and field-fabricated exterior doors, may be installed only if the manufacturer has certified to the Commission, or if an independent certifying organization approved by the Commission has certified, that the product complies with all of the applicable requirements of this subsection.
Air leakage. Manufactured fenestration products and exterior doors shall have air infiltration rates not exceeding 0.3 cfm/ft2 of window area, 0.3 cfm/ft2 of door area for residential doors, 0.3 cfm/ft2 of door area for nonresidential single doors (swinging and sliding), and 1.0 cfm/ft2 for nonresidential double doors (swinging), when tested according to NFRC-400 or ASTM E283 at a pressure differential of 75 pascals (or 1.57 pounds/ft2), incorporated herein by reference.
NOTES TO SECTION 110.6(a)1:Pet doors must meet 0.3 cfm/ft2 when tested according to ASTM E283 at 75 pascals (or 1.57 pounds per square foot). AAMA/WDMA/CSA 101/I.S.2/A440-2011 specification is equivalent to ASTM E283 at a pressure differential of 75 pascals (or 1.57 pounds per square foot) and satisfies the air leakage certification requirements of this section.
Exception to Section 110.6(a)1: Field-fabricated fenestration and field-fabricated exterior doors.
U-factor. The fenestration product and exterior door’s U-factor shall be rated in accordance with NFRC 100, or use the applicable default U-factor set forth in Table 110.6-A.
Exception 1 to Section 110.6(a)2: If the fenestration product is a skylight in a building covered by the nonresidential standards with less than 200 square feet of skylight area, the default U-factor may be calculated as set forth in Reference Nonresidential Appendix NA6.
Exception 2 to Section 110.6(a)2: If the fenestration product is an alteration consisting of any area replacement of glass in a skylight product in a building covered by the nonresidential standards, the default U-factor may be calculated as set forth in Reference Nonresidential Appendix NA6.
Solar heat gain coefficient SHGC. The fenestration product’s SHGC shall be rated in accordance with NFRC 200, or use the applicable default SHGC set forth in TABLE 110.6-B.
EXCEPTION 1 to Section 110.6(a)3: If the fenestration product is a skylight in a building covered by the nonresidential standards with less than 200 square feet of skylight area, the default SHGC may be calculated as set forth in Reference Nonresidential Appendix NA6.
EXCEPTION 2 to Section 110.6(a)3: If the fenestration product is an alteration consisting of any area replacement of glass in a skylight product in a building covered by the nonresidential standards, the default SHGC may be calculated as set forth in Reference Nonresidential Appendix NA6.
Visible transmittance (VT). The fenestration product’s VT shall be rated in accordance with NFRC 200 or ASTM E972, for tubular daylighting devices VT shall be rated using NFRC 203.
Exception 1 to Section 110.6(a)4: If the fenestration product is a skylight in a building covered by the nonresidential standards with less than 200 square feet of skylight area, the default VT may be calculated as set forth in Reference Nonresidential Appendix NA6.
Exception 2 to Section 110.6(a)4: If the fenestration product is an alteration consisting of any area; replacement of glass in a skylight product in a building covered by the nonresidential standards, the default VT may be calculated as set forth in Reference Nonresidential Appendix NA6.
Labeling. Fenestration products and exterior doors shall:
Have a temporary label for manufactured fenestration products and exterior doors or a label certificate when the Component Modeling Approach (CMA) is used and for site-built fenestration meeting the requirements of Section 10-111(a)1. The temporary label shall not be removed before inspection by the enforcement agency; and

Have a permanent label or label certificate when the Component Modeling Approach (CMA) is used and for site-built fenestration meeting the requirements of Section 10-111(a)2 if the product is rated using NFRC procedures.
Fenestration acceptance requirements. Before an occupancy permit is granted site-built fenestration products in other than single-family buildings shall be certified as meeting the Acceptance Requirements for Code Compliance, as specified in the Reference Nonresidential Appendix NA7 to ensure that site-built fenestration meets Standards requirements, including a matching label certificate for product(s) installed and be readily accessible at the project location. A certificate of acceptance certifying that the fenestration product meets the acceptance requirements shall be completed, signed and submitted to the enforcement agency.
Exception to Section 110.6(a): Fenestration products removed and reinstalled as part of a building alteration or addition.
Installation of field-fabricated fenestration and exterior doors. Field-fabricated fenestration and field- fabricated exterior doors may be installed only if the compliance documentation has demonstrated compliance for the installation using U-factors from Table 110.6-A and SHGC values from Table 110.6-B. Field-fabricated fenestration and field-fabricated exterior doors shall be caulked between the fenestration products or exterior door and the building, and shall be weatherstripped.
Exception to Section 110.6(b): Unframed glass doors and fire doors need not be weatherstripped or caulked.

TABLE 110.6-A DEFAULT FENESTRATION PRODUCT U-FACTORS
Frame	Product Type	Single Pane 3, 4
U-Factor	Double Pane 1, 3, 4
U-Factor	Glass Block 2,3
U-Factor	
Metal	Operable	1.28	0.79	0.87	
Metal	Fixed	1.19	0.71	0.72	
Metal	Greenhouse/Garden Window	2.26	1.40	N.A.	
Metal	Glazed Doors	1.25	0.77	N.A.	
Metal	Skylight	1.98	1.30	N.A.	
Metal, Thermal Break	Operable	N.A.	0.66	N.A.	
Metal, Thermal Break	Fixed	N.A.	0.55	N.A.	
Metal, Thermal Break	Greenhouse/Garden Window	N.A.	1.12	N.A.	
Metal, Thermal Break	Glazed Doors	N.A.	0.59	N.A.	
Metal, Thermal Break	Skylight	N.A.	1.11	N.A.	
Nonmetal	Operable	0.99	0.58	0.60	
Nonmetal	Fixed	1.04	0.55	0.57	
Nonmetal	Glazed Doors	0.99	0.53	N.A.	
Nonmetal	Greenhouse/Garden Windows	1.94	1.06	N.A.	
Nonmetal	Skylight	1.47	0.84	N.A.	
For all dual-glazed fenestration products, adjust the listed U-factors as follows:
Add 0.05 for products with dividers between panes if spacer is less than 7/16 inch wide.
Add 0.05 to any product with true divided lite (dividers through the panes).
Translucent or transparent panels shall use glass block values when not rated by NFRC 100.
Visible Transmittance (VT) shall be calculated by using Reference Nonresidential Appendix NA6.
Windows with window film applied that is not rated by NFRC 100 shall use the default values from this table.

TABLE 110.6-B DEFAULT SOLAR HEAT GAIN COEFFICIENT (SHGC)
FRAME TYPE	PRODUCT	GLAZING	FENESTRATION PRODUCT SHGC
Single Pane2,3 SHGC	FENESTRATION PRODUCT SHGC
Double Pane2,3 SHGC	FENESTRATION PRODUCT SHGC
Glass Block1,2 SHGC	
Metal	Operable	Clear	0.80	0.70	0.70	
Metal	Fixed	Clear	0.83	0.73	0.73	
Metal	Operable	Tinted	0.67	0.59	N.A.	
Metal	Fixed	Tinted	0.68	0.60	N.A.	
Metal, Thermal Break	Operable	Clear	N.A.	0.63	N.A.	
Metal, Thermal Break	Fixed	Clear	N.A.	0.69	N.A.	
Metal, Thermal Break	Operable	Tinted	N.A.	0.53	N.A.	
Metal, Thermal Break	Fixed	Tinted	N.A.	0.57	N.A.	
Nonmetal	Operable	Clear	0.74	0.65	0.70	
Nonmetal	Fixed	Clear	0.76	0.67	0.67	
Nonmetal	Operable	Tinted	0.60	0.53	N.A.	
Nonmetal	Fixed	Tinted	0.63	0.55	N.A.	
Translucent or transparent panels shall use glass block values when not rated by NFRC 200.
Visible Transmittance (VT) shall be calculated by using Reference Nonresidential Appendix NA6.
Windows with window film applied that is not rated by NFRC 200 shall use the default values from this table.

SECTION 110.7 – MANDATORY REQUIREMENTS TO LIMIT AIR LEAKAGE
All joints, penetrations and other openings in the building envelope that are potential sources of air leakage shall be caulked, gasketed, weather-stripped or otherwise sealed to limit infiltration and exfiltration.
Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.8, and 25943, Public Resources Code.

SECTION 110.8 – MANDATORY REQUIREMENTS FOR INSULATION, ROOFING PRODUCTS AND RADIANT BARRIERS
Insulation certification by manufacturers. All insulation shall be certified by Department of Consumer Affairs, Bureau of Household Goods and Services that the insulation conductive thermal performance is approved pursuant to the California Code of Regulations, Title 24, Part 12, Chapters 12-13, Article 3, “Standards for Insulating Material.”
Installation of urea formaldehyde foam insulation. Urea formaldehyde foam insulation may be applied or installed only if:
It is installed in exterior side walls; and
A 4-mil-thick plastic polyethylene vapor retarder or equivalent plastic sheathing vapor retarder is installed between the urea formaldehyde foam insulation and the interior space in all applications.
Flame spread rating of insulation. All insulating material shall be installed in compliance with the flame spread rating and smoke density requirements of the CBC.
Installation of insulation in existing buildings. Insulation installed in an existing attic, or on an existing duct or water heater, shall comply with the applicable requirements of Subsections 1, 2 and 3 below. If a contractor installs the insulation, the contractor shall certify to the customer, in writing, that the insulation meets the applicable requirements of Subsections 1, 2 and 3 below.
Attics. If insulation is installed in the existing attic of a low-rise residential building, the R-value of the total amount of insulation (after addition of insulation to the amount, if any, already in the attic) shall meet the requirements of Section 150.0(a) for single-family buildings and Section 180.2(a)1 for multifamily buildings three habitable stories or less.
Exception to Section 110.8(d)1: Where the accessible space in the attic is not large enough to accommodate the required R-value, the entire accessible space shall be filled with insulation, provided such installation does not violate Section 1202.2 of Title 24, Part 2 or Section 806 of Title 24, Part 2.5.
Water heaters. If external insulation is installed on an existing unfired water storage tank or on an existing back-up tank for a solar water-heating system, it shall have an R-value of at least R-3.5, or the heat loss of the tank surface based on an 80°F water-air temperature difference shall be less than 6.5 Btu per hour per square foot.
Ducts. If insulation is installed on an existing space-conditioning duct, it shall comply with Section 605.0 of the CMC.
Reserved.
Reserved.
Insulation requirements for heated slab floors. Heated slab floors shall be insulated according to the requirements in Table 110.8-A.
Insulation materials in ground contact must:
Comply with the certification requirements of Section 110.8(a); and
Have a water absorption rate for the insulation material alone without facings that is no greater than
0.3 percent when tested in accordance with Test Method A – 24 Hour-Immersion of ASTM C272.
Water vapor permeance no greater than 2.0 perm/ inch when tested in accordance with ASTM E96.
Insulation installation must:
Be covered with a solid guard that protects against damage from ultraviolet radiation, moisture, landscaping operation, equipment maintenance and wind; and

Include a rigid plate, which penetrates the slab and blocks the insulation from acting as a conduit for insects from the ground to the structure above the foundation.
TABLE 110.8-A SLAB INSULATION REQUIREMENTS FOR HEATED SLAB FLOOR
Insulation Location	Insulation Orientation	Installation Requirements	Climate Zone	Insulation R-Value	
Outside edge of heated slab, either inside or outside the foundation wall	Vertical	From the level of the top of the slab, down 16 inches or to the frost line, whichever is greater. Insulation may stop at the top of the footing where this is less than the required depth. For below grade slabs, vertical insulation shall be extended from the top of the foundation wall to the bottom of the foundation (or the top of the footing) or to the frost line, whichever is greater.	1 – 15	5	
			16	10	
Between heated slab and outside foundation wall	Vertical and Horizontal	Vertical insulation from top of slab at inside edge of outside wall down to the top of the horizontal insulation. Horizontal insulation from the outside edge of the vertical insulation extending 4 feet toward the center of the slab in a direction normal to the outside of the building in plan view.	1 – 15	5	
			16	10 vertical
and 7 horizontal	

Wet insulation systems. When insulation is installed on roofs above the roofing membrane or layer used to seal the roof from water penetration, the effective R-value of the insulation shall be as specified in Reference Joint Appendix JA4.
Roofing products solar reflectance and thermal emittance.
In order to meet the requirements of Sections 140.1, 140.2, 140.3(a)1, 141.0(b)2B, 150.1(c)11, 150.2(b)1I or 150.2(b)2, a roofing product’s thermal emittance and an aged solar reflectance shall be certified and labeled according to the requirements of Section 10-113.
Exception 1 to Section 110.8(i)1: Roofing products that are not certified according to Section 10-113 shall assume the following default aged solar reflectance/thermal emittance values:
For asphalt shingles: 0.08/0.75
For all other roofing products: 0.10/0.75
If CRRC testing for an aged solar-reflectance is not available for any roofing products, the aged value shall be derived from the CRRC initial value using the equation ρaged=[0.2+β[ρinitial-0.2], where ρinitial = the initial solar reflectance and soiling resistance β is listed by product type in Table 110.8-B.
TABLE 110.8-B VALUES OF SOILING RESISTANCE β BY PRODUCT TYPE
Product Type	CRRC Product Category	β	
Field-Applied Coating	Field-Applied Coating	0.65	
Other	Not A Field-Applied Coating	0.70	

Solar Reflectance Index (SRI), calculated as specified by ASTM E1980-01, may be used as an alternative to thermal emittance and an aged solar reflectance when complying with the requirements of Sections 140.2, 140.3(a)1, 141.0(b)2B, 150.1(c)11, 150.2(b)1I or 150.2(b)2. SRI calculations shall be based on moderate wind velocity of 2–6 meters per second. The SRI shall be calculated based on the aged solar reflectance value of the roofing products.
Liquid applied roof coatings applied to low-sloped roofs in the field as the top surface of a roof covering shall:
Be applied across the entire roof surface to meet the dry mil thickness or coverage recommended by the coating manufacturer, taking into consideration the substrate on which the coating is applied; and
Meet the minimum performance requirements listed in Table 110.8-C or the minimum performance requirements of ASTM C836, D3468, D6083 or D6694, whichever are appropriate to the coating material.
Exception 1 to Section 110.8(i)4B: Aluminum- pigmented asphalt roof coatings shall meet the requirements of ASTM D2824 and be installed as specified by ASTM D3805.
Exception 2 to Section 110.8(i)4B: Cement- based roof coatings shall contain a minimum of 20 percent cement and shall meet the requirements of ASTM C1583, ASTM D822 and ASTM D5870.
TABLE 110.8-C MINIMUM PERFORMANCE REQUIREMENTS FOR LIQUID APPLIED ROOF COATINGS
Physical Property	ASTM Test Procedure	Requirement	
Initial percent elongation (break)	D2370	Minimum 200% @ 73° F (23° C)	
Initial percent elongation (break) OR
Initial Flexibility	D2370

D522, Test B	Minimum 60% @ 0° F (-18° C)

Minimum pass 1” mandrel @ 0° F (-18° C)	
Initial tensile strength (maximum stress)	D2370	Minimum 100 psi (1.38 Mpa) @ 73° F (23° C)	
Initial tensile strength (maximum stress) OR
Initial Flexibility	D2370

D522, Test B	Minimum 200 psi (2.76 Mpa) @ 0° F (-18° C)

Minimum pass 1” mandrel @ 0° F (-18° C)	
Final percent elongation (break) after accelerated weathering 1000 h	D2370	Minimum 100% @ 73° F (23° C)	
Final percent elongation (break) after accelerated weathering 1000 h
OR
Flexibility after accelerated weathering 1000 h	D2370

D522, Test B	Minimum 40% @ 0° F (-18° C)

Minimum pass 1” mandrel @ 0° F (-18° C)	
Permeance	D1653	Maximum 50 perms	
Accelerated weathering 1000 h	D4798	No cracking or checking1	
1. Any cracking or checking visible to the eye fails the test procedure.
Radiant barrier. A radiant barrier shall have an emittance of 0.05 or less, tested in accordance with ASTM C1371 or ASTM E408, and shall be certified to the Department of Consumer Affairs as required by Title 24, Part 12, Chapter 12-13, Standards for Insulating Material.
Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.8, and 25943, Public Resources Code

SECTION 110.9 – MANDATORY REQUIREMENTS FOR LIGHTING CONTROLS
All lighting control devices and systems and all light sources subject to the requirements of Section 110.9 shall meet the following requirements:
Shall be installed only if the lighting control or light source complies with all of the applicable requirements of Section 110.9.
Lighting controls may be individual devices or systems consisting of two or more components.
All lighting controls. Lighting controls listed in Section 110.9(b) shall comply with the requirements listed below; and all components of the system considered together as installed shall meet all applicable requirements for the application for which they are installed as required in Sections 130.0 through 130.5, Sections 140.6 through 140.8, Section 141.0, and Section 150.0(k).
Time-switch lighting controls. All controls that provide time-switch functionality, including all automatic and astronomical time-switch controls, shall have program backup capabilities that prevent the loss of the device’s schedule for at least 7 days, and the device’s date and time for at least 72 hours if power is interrupted. In addition:
Time-switch controls installed in nonresidential buildings shall:
For each connected load, be capable of providing manual override to each connected load and of resuming normally scheduled operation after a manual override is initiated within 2 hours; and
Provide an automatic holiday shutoff feature that turns off all connected loads for at least 24 hours and then resumes normally scheduled operation.
Astronomical time-switch controls shall:
Have sunrise and sunset prediction accuracy within plus-or-minus 15 minutes and timekeeping accuracy within 5 minutes per year;
Be capable of displaying date, current time, sunrise time, sunset time, and switching times for each step during programming;
Be capable of automatically adjusting for daylight savings time; and
Have the ability to independently offset the on and off for each channel by at least 90 minutes before and after sunrise or sunset.
Multilevel time-switch controls shall include at least two separately programmable steps per zone.
Time-switch controls installed outdoors shall have setback functions that allow the lighting on each controlled channel to be switched or dimmed to lower levels. The setback functions shall be capable of being programmed by the user for at least one specific time of day.
Daylighting controls. Controls that provide automatic daylighting functionality shall:
Automatically return to its most recent time delay settings within 60 minutes of the last received input when left in calibration mode;
Have a set point control that easily distinguishes settings to within 10 percent of full-scale adjustment;
Provide a linear response within 5 percent accuracy over the range of illuminance measured by the light sensor; and
Be capable of being calibrated in a manner that the person initiating the calibration is remote from the sensor during calibration to avoid influencing calibration accuracy, for example by having a light sensor that is physically separated from where the calibration adjustments are made.
Dimmers. Controls that provide dimming functionality shall:
Be capable of reducing lighting power consumption by a minimum of 65 percent when at its lowest setting;

Provide reduced flicker operation, meaning that directly controlled light sources shall be provided electrical power such that the light output has an amplitude modulation of less than 30 percent for frequencies less than 200 Hz without causing premature lamp failure;
Provide an offsetting that produces a zero lumen output; and
For wall box dimmers and associated switches designed for use in three way circuits, be capable of turning lights off, and on to the level set by the dimmer if the lights are off.
Occupant sensing controls. Occupant sensing controls include occupant sensors, motion sensors, and vacancy sensors, including those with a partial-ON or partial-OFF function. Occupant sensing controls shall:
Be capable of automatically turning the controlled lights in the area either off or down no more than 20 minutes after the area has been vacated;
For manual-on controls, have a grace period of no less than 15 seconds and no more than 30 seconds to turn on lighting automatically after the sensor has timed out; and
Provide a visible status signal that indicates that the device is operating properly, or that it has failed or malfunctioned. The visible status signal may have an override that turns off the signal.
Exception to Section 110.9(b)4: Occupant sensing control systems may consist of a combination of single or multilevel occupant, motion or vacancy sensor controls, provided that components installed to comply with manual-on requirements shall not be capable of conversion by occupants from manual-on to automatic-on functionality.
Reserved.
Sensors used to detect occupants. Sensors that are used by occupant sensing controls to detect occupants shall meet all of the following requirements:
Sensors shall not incorporate switches or mechanical devices that allow the sensor to be disabled without changing the settings of the control.
Sensors that utilize ultrasonic radiation for detection of occupants shall:
comply with 21 C.F.R. part 1002.12;
not emit audible sound; and
not emit ultrasound in excess of the decibel levels shown in Table 110.9-A measured no more than 5 feet from the source, on axis.
Sensors that utilize microwave radiation for detection of occupants shall:
comply with 47 C.F.R. parts 2 and 15; and
not emit radiation in excess of 1 milliwatt per square centimeter measured at no more than 5 centimeters from the emission surface of the device.
Indicator lights. Indicator lights integral to lighting controls shall consume no more than 1 watt of power per indicator light.
Track lighting integral current limiter. An integral current limiter for line-voltage track lighting shall be recognized for compliance with Part 6 only if it meets all of the following requirements:
Shall have the identical volt-ampere (VA) rating of the current limiter as installed and rated for compliance with Part 6 clearly marked as follows:
So that it is visible for the enforcement agency’s field inspection without opening coverplates, fixtures or panels; and
Permanently marked on the circuit breaker; and
On a factory-printed label that is permanently affixed to a nonremovable base-plate inside the wiring compartment.

Shall have a conspicuous factory installed label permanently affixed to the inside of the wiring compartment warning against removing, tampering with, rewiring or bypassing the device; and
Each electrical panel from which track lighting integral current limiters are energized shall have a factory printed label permanently affixed and prominently located, stating the following: “NOTICE: Current limiting devices installed in track lighting integral current limiters connected to this panel shall only be replaced with the same or lower amperage. Adding track or replacement of existing current limiters with higher continuous ampere rating will void the track lighting integral current limiter certification, and will require resubmittal of compliance documentation to the enforcement agency responsible for compliance with the California Title 24, Part 6 Building Energy Efficiency Standards.”
Track lighting supplementary overcurrent protection panel. A Track Lighting Supplementary Overcurrent Protection Panel shall be used only for line-voltage track lighting and shall be recognized for compliance with Part 6 only if it meets all of the following requirements:
Shall be listed as defined in Section 100.1; and
Shall have a permanently installed label that is prominently located stating the following: “NOTICE: This Panel for Track Lighting Energy Code Compliance Only.” The overcurrent protection devices in this panel shall only be replaced with the same or lower amperage. No other overcurrent protective device shall be added to this panel. Adding to, or replacement of, existing overcurrent protective device(s) with higher continuous ampere rating will void the panel listing and require resubmittal of compliance documentation to the enforcement agency responsible for compliance with the California Title 24, Part 6 Building Energy Efficiency Standards.

TABLE 110.9-A - ULTRASOUND MAXIMUM DECIBEL VALUES
MID-FREQUENCY OF SOUND PRESSURE THIRD-OCTAVE BAND (IN
kHz)	MAXIMUM DB LEVEL WITHIN THIRD-OCTAVE BAND (IN dB REFERENCE 20 MICROPASCALS)	
Less than 20	80	
20 or more to less than 25	105	
25 or more to less than 31.5	110	
31.5 or more	115	

Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and 52943, Public Resources Code.

SECTION 110.10 – MANDATORY REQUIREMENTS FOR SOLAR READINESS
Covered occupancies.
Single-family residences. Single-family residences located in subdivisions with ten or more single-family residences and where the application for a tentative subdivision map for the residences has been deemed complete or approved by the enforcement agency, which do not have a photovoltaic system installed, shall comply with the requirements of Sections 110.10(b) through 110.10(e)
Low-rise multifamily buildings. Low-rise multifamily buildings that do not have a photovoltaic system installed shall comply with the requirements of Sections 110.10(b) through 110.10(d).
Hotel/motel occupancies and high-rise multifamily buildings. Hotel/motel occupancies and high-rise multifamily buildings with ten habitable stories or fewer, that do not have a photovoltaic system installed, shall comply with the requirements of Sections 110.10(b) through 110.10(d).
Nonresidential buildings. Nonresidential buildings with three habitable stories or fewer, other than I-2 and I-2.1 buildings, that do not have a photovoltaic system installed, shall comply with the requirements of Sections 110.10(b) through 110.10(d).
Solar zone.
Minimum solar zone area. The solar zone shall have a minimum total area as described below. The solar zone shall comply with access, pathway, smoke ventilation, and spacing requirements as specified in Title 24, Part 9 or other Parts of Title 24 or in any requirements adopted by a local jurisdiction. The solar zone total area shall be comprised of areas that have no dimension less than five feet and are no less than 80 square feet each for buildings with roof areas less than or equal to 10,000 square feet or no less than 160 square feet each for buildings with roof areas greater than 10,000 square feet.
Single-family residences. The solar zone shall be located on the roof or overhang of the building and have a total area no less than 250 square feet.
Exception 1 to Section 110.10(b)1A: Single-family residences with a permanently installed domestic solar water-heating system meeting the installation criteria specified in the Reference Residential Appendix RA4 and with a minimum solar savings fraction of 0.50.
Exception 2 to Section 110.10(b)1A: Single-family residences with three habitable stories or more and with a total floor area less than or equal to 2000 square feet and having a solar zone total area no less than 150 square feet.
Exception 3 to Section 110.10(b)1A: Single-family residences located in the Wildland-Urban Interface Fire Area as defined in Title 24, Part 2 and having a whole house fan and having a solar zone total area no less than 150 square feet.
Exception 4 to Section 110.10(b)1A: Buildings with a designated solar zone area that is no less than 50 percent of the potential solar zone area. The potential solar zone area is the total area of any low- sloped roofs where the annual solar access is 70 percent or greater and any steep-sloped roofs oriented between 90 degrees and 300 degrees of true north where the annual solar access is 70 percent or greater. Solar access is the ratio of solar insolation including shade to the solar insolation without shade. Shading from obstructions located on the roof or any other part of the building shall not be included in the determination of annual solar access.
Exception 5 to Section 110.10(b)1A: Single-family residences having a solar zone total area no less than 150 square feet and where all thermostats are demand responsive controls and comply with Section 110.12(a), and are capable of receiving and responding to Demand Response Signals prior to granting of an occupancy permit by the enforcing agency.
Exception 6 to Section 110.10(b)1A: Single-family residences meeting the following conditions:

All thermostats are demand responsive controls that comply with Section 110.12(a), and are capable of receiving and responding to Demand Response Signals prior to granting of an occupancy permit by the enforcing agency.
Comply with one of the following measures:
Install a dishwasher that meets or exceeds the ENERGY STAR® Program requirements with a refrigerator that meets or exceeds the ENERGY STAR Program requirements, a whole house fan driven by an electronically commutated motor, or an SAE J1772 Level 2 Electric Vehicle Supply Equipment (EVSE or EV charger) with a minimum of 40 amperes; or
Install a home automation system capable of, at a minimum, controlling the appliances and lighting of the dwelling and responding to demand response signals; or
Install alternative plumbing piping to permit the discharge from the clothes washer and all showers and bathtubs to be used for an irrigation system in compliance with the California Plumbing Code and any applicable local ordinances; or
Install a rainwater catchment system designed to comply with the California Plumbing Code and any applicable local ordinances, and that uses rainwater flowing from at least 65 percent of the available roof area.
Multifamily buildings, hotel/motel occupancies and nonresidential buildings. The solar zone shall be located on the roof or overhang of the building or on the roof or overhang of another structure located within 250 feet of the building or on covered parking installed with the building project, and shall have a total area no less than 15 percent of the total roof area of the building excluding any skylight area. The solar zone requirement is applicable to the entire building, including mixed occupancy.
Exception 1 to Section 110.10(b)1B: High-rise multifamily buildings, hotel/motel occupancies, and nonresidential buildings with a permanently installed solar electric system having a nameplate DC power rating, measured under Standard Test Conditions, of no less than one watt per square foot of roof area.
Exception 2 to Section 110.10(b)1B: High-rise multifamily buildings, hotel/motel occupancies with a permanently installed domestic solar water-heating system complying with Section 150.1(c)8Biii.
Exception 3 to Section 110.10(b)1B: Buildings with a designated solar zone area that is no less than 50 percent of the potential solar zone area. The potential solar zone area is the total area of any low- sloped roofs where the annual solar access is 70 percent or greater and any steep-sloped roofs oriented between 90 degrees and 300 degrees of true north where the annual solar access is 70 percent or greater. Solar access is the ratio of solar insolation including shade to the solar insolation without shade. Shading from obstructions located on the roof or any other part of the building shall not be included in the determination of annual solar access.
Exception 4 to Section 110.10(b)1B: Low-rise and high-rise multifamily buildings with all thermostats in each dwelling unit are demand response controls that comply with Section 110.12(a), and are capable of receiving and responding to Demand Response Signals prior to granting of an occupancy permit by the enforcing agency. In addition, either A or B below:
In each dwelling unit, comply with one of the following measures:
Install a dishwasher that meets or exceeds the ENERGY STAR Program requirements with either a refrigerator that meets or exceeds the ENERGY STAR Program requirements or a whole house fan driven by an electronically commutated motor; or
Install a home automation system that complies with Section 110.12(a) and is capable of, at a minimum, controlling the appliances and lighting of the dwelling and responding to demand response signals; or

Install alternative plumbing piping to permit the discharge from the clothes washer and all showers and bathtubs to be used for an irrigation system in compliance with the California Plumbing Code and any applicable local ordinances; or
Install a rainwater catchment system designed to comply with the California Plumbing Code and any applicable local ordinances, and that uses rainwater flowing from at least 65 percent of the available roof area.
Meet the Title 24, Part 11, Section A4.106.8.2 requirements for electric vehicle charging spaces.
Exception 5 to Section 110.10(b)1B: Buildings where the roof is designed and approved to be used for vehicular traffic or parking or for a heliport.
Azimuth range. All sections of the solar zone located on steep-sloped roofs shall have an azimuth range between 90 degrees and 300 degrees of true north.
Shading.
No obstructions, including but not limited to, vents, chimneys, architectural features and roof mounted equipment, shall be located in the solar zone.
Any obstruction, located on the roof or any other part of the building that projects above a solar zone shall be located at least twice the distance, measured in the horizontal plane, of the height difference between the highest point of the obstruction and the horizontal projection of the nearest point of the solar zone, measured in the vertical plane.
Exception to Section 110.10(b)3: Any roof obstruction, located on the roof or any other part of the building, that is oriented north of all points on the solar zone.
Structural design loads on construction documents. For areas of the roof designated as solar zone, the structural design loads for roof dead load and roof live load shall be clearly indicated on the construction documents.
Note: Section 110.10(b)4 does not require the inclusion of any collateral loads for future solar energy systems.
Interconnection pathways.
The construction documents shall indicate a location reserved for inverters and metering equipment and a pathway reserved for routing of conduit from the solar zone to the point of interconnection with the electrical service.
For single-family residences and central water-heating systems, the construction documents shall indicate a pathway for routing of plumbing from the solar zone to the water-heating system.
Documentation. A copy of the construction documents or a comparable document indicating the information from Sections 110.10(b) through 110.10(c) shall be provided to the occupant.
Main electrical service panel.
The main electrical service panel shall have a minimum busbar rating of 200 amps.
The main electrical service panel shall have a reserved space to allow for the installation of a double pole circuit breaker for a future solar electric installation. The reserved space shall be permanently marked as “For Future Solar Electric”.
Note: Authority: Sections 25213, 25218, 25218.5, 25402, 25402.1, and 25605, Public Resources Code. Reference:
Sections 25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.8, 25605, and 25943, Public Resources
Code.

SECTION 110.11 – MANDATORY REQUIREMENTS FOR ELECTRICAL POWER DISTRIBUTION SYSTEM
Certification by Manufacturers. Any electrical power distribution system equipment listed in this section may be installed only if the manufacture has certified to the Commission that the equipment complies with all the applicable requirements of this section.
Low-voltage dry-type distribution transformer shall be certified by the Manufacturer as required by the Title 20 Appliance Efficiency Regulations.
EXCEPTION to Section 110.11(a):
autotransformer;
drive (isolation) transformer;
grounding transformer;
machine-tool (control) transformer;
nonventilated transformer;
rectifier transformer;
regulating transformer;
sealed transformer;
special-impedance transformer;
testing transformer;
transformer with tap range of 20 percent or more;
uninterruptible power supply transformer; or
welding transformer.
Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.8, and 25943, Public Resources Code.

SECTION 110.12 – MANDATORY REQUIREMENTS FOR DEMAND MANAGEMENT
Buildings, other than healthcare facilities, that install or are required to install demand responsive controls shall comply with the applicable demand responsive control requirements of Sections 110.12(a) through 110.12(e).
Demand responsive controls.
All demand responsive controls shall be either:
A certified OpenADR 2.0a or OpenADR 2.0b Virtual End Node (VEN), as specified under Clause 11, Conformance, in the applicable OpenADR 2.0 Specification; or
Certified by the manufacturer as being capable of responding to a demand response signal from a certified OpenADR 2.0b Virtual End Node by automatically implementing the control functions requested by the Virtual End Node for the equipment it controls.
All demand responsive controls shall be capable of communicating with the VEN using a wired or wireless bidirectional communication pathway.
RESERVED
When communications are disabled or unavailable, all demand responsive controls shall continue to perform all other control functions provided by the control.
Demand responsive control thermostats shall comply with Reference Joint Appendix 5 (JA5), Technical Specifications for Occupant Controlled Smart Thermostats.
Demand Responsive Zonal HVAC Controls. Nonresidential HVAC systems with DDC to the Zone level shall be programmed to allow centralized demand shed for noncritical zones as follows:
The controls shall have a capability to remotely increase the operating cooling temperature set points by 4 degrees or more in all noncritical zones on signal from a centralized contact or software point within an Energy Management Control System (EMCS).
The controls shall have a capability to remotely decrease the operating heating temperature set points by 4 degrees or more in all noncritical zones on signal from a centralized contact or software point within an EMCS.
The controls shall have capabilities to remotely reset the temperatures in all noncritical zones to original operating levels on signal from a centralized contact or software point within an EMCS.
The controls shall be programmed to provide an adjustable rate of change for the temperature increase, decrease, and reset.
The controls shall have the following features:
Disabled. Disabled by authorized facility operators; and
Manual control. Manual control by authorized facility operators to allow adjustment of heating and cooling set points globally from a single point in the EMCS; and
Automatic Demand Shed Control. Upon receipt of a demand response signal, the space- conditioning systems shall conduct a centralized demand shed, as specified in Sections 110.12(b)1 and 110.12(b)2, for noncritical zones during the demand response period.
Demand Responsive Lighting Controls. Buildings with nonresidential lighting systems having a total installed lighting power of 4,000 watts or greater that are subject to the requirements of Section 130.1(b) shall install controls that are capable of automatically reducing lighting power in response to a Demand Response Signal.
For compliance testing, the lighting controls shall demonstrate a 15-percent or greater reduction in lighting power as described in NA7.6.3. The controls may provide additional demand responsive functions or abilities.

For buildings where demand response controls are required, demand responsive controls shall control the general lighting that is subject to the requirements of Section 130.1(b) and may control additional lighting.
General lighting shall be reduced in a manner consistent with the uniform level of illumination requirements in Table 130.1-A.
Exception to Section 110.12(c): Spaces where a health or life safety statute, ordinance, or regulation does not permit the general lighting to be reduced are not required to install demand responsive controls and do not count toward the 4,000-watt threshold.
Demand Responsive Electronic Message Center Control. Controls for electronic message centers greater than 15 kW shall be capable of reducing the lighting power by a minimum of 30 percent when receiving a demand response signal.
Exception to Section 110.12(d): Electronic message centers that are not permitted by a health or life safety statute, ordinance, or regulation to be reduced.
	Demand Responsive Controlled Receptacles. Controlled receptacles in buildings shall be capable of automatically turning off all loads connected to the receptacle in response to a demand response signal.
Exception 1 to Section 110.12(e): Buildings not required to have demand responsive lighting controls.
Exception 2 to Section 110.12(e): Spaces where a health or life safety statute, ordinance or regulation does not permit the receptacles to be automatically controlled.

NOTE: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and 25943, Public Resources Code.

SUBCHAPTER 3
NONRESIDENTIAL, HOTEL/MOTEL OCCUPANCIES, AND COVERED PROCESSES—MANDATORY REQUIREMENTS

SECTION 120.0— GENERAL
Sections 120.1 through 120.10 establish requirements for the design and installation of building envelopes, ventilation, space-conditioning and service water-heating systems and equipment in nonresidential and hotel/motel buildings as well as covered processes that are within the scope of Section 100.0(a).
NOTE: The requirements of Sections 120.1 through 120.10 apply to newly constructed buildings. Section 141.0 specifies which requirements of Sections 120.1 through 120.10 also apply to additions or alterations to existing buildings.
Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and 25943, Public Resources Code.

SECTION 120.0— GENERAL

SECTION 120.1 – REQUIREMENTS FOR VENTILATION AND INDOOR AIR QUALITY
General requirements.
All occupiable spaces in hotel/motel buildings, and nonresidential buildings other than healthcare facilities shall comply with the applicable requirements of Section 120.1(a) through 120.1(g). Healthcare facilities shall be ventilated in accordance with Chapter 4 of the California Mechanical Code.
The required outdoor air-ventilation rate and the air-distribution system design shall be clearly identified on the plans in accordance with Section 10-103 of Title 24, Part 1.
Reserved.
Nonresidential and hotel/motel buildings. All occupiable spaces shall meet the requirements of Section 120.1(c)1, and shall also comply with either Section 120.1(c)2 or Section 120.1(c)3.
Air filtration.
Mechanical system types specified in Subsections i, ii and iii below shall be designed to ensure that all recirculated air and all outdoor air supplied to the occupiable space is filtered before passing through any system thermal conditioning components. Air filters shall conform to the requirements of Sections 120.1(c)1B, 120.1(c)1C and 120.1(c)1D.
Mechanical space-conditioning systems that supply air to an occupiable space through ductwork exceeding 10 ft (3 m) in length.
Mechanical supply-only ventilation systems and makeup air systems that provide outside air to an occupiable space.
The supply side of mechanical balanced ventilation systems, including heat recovery ventilation systems and energy recovery ventilation systems that provide outside air to an occupiable space.
Exception to Section 120.1(c)1A: For heat recovery ventilators and energy recovery ventilators, the location of the filters required by Section 120.1(c)1A may be downstream of a system thermal conditioning component, provided the system is equipped with ancillary filtration upstream of the system’s thermal conditioning component.
Air filter efficiency. The filters shall have a designated efficiency equal to or greater than MERV 13 when tested in accordance with ASHRAE Standard 52.2, or a particle size efficiency rating equal to or greater than 50 percent in the 0.30–1.0 µm range, and equal to or greater than 85 percent in the 1.0–
3.0 µm range when tested in accordance with AHRI Standard 680; and
Systems shall be equipped with air filters that meet either Subsection i or ii below.
Nominal 2-inch minimum depth filter(s); or
Nominal one inch minimum depth filter(s) shall be allowed if the filter(s) are sized according to Equation 120.1-A, based on a maximum face velocity of 150 feet per minute.

Aface = Qfilter /Vface	(Equation 120.1-A) Where:
Aface =	air filter face area, the product of air filter nominal length × nominal width, ft2 Qfilter	=	design airflow rate for the air filter, ft3/min
Vface =	air filter face velocity £ 150, ft/min
Filter racks or grilles shall use gaskets, sealing or other means to close gaps around inserted filters and prevent air from bypassing the filter.

Natural ventilation. Naturally ventilated spaces shall be designed in accordance with 120.1(c)2A through 120.1(c)2C and include a mechanical ventilation system designed in accordance with 120.1(c)3:
Floor area to be ventilated. Spaces or portions of spaces to be naturally ventilated shall be located within a distance based on the ceiling height, as specified in i, ii and iii. The ceiling height (H) to be used in i, ii or iii shall be the minimum ceiling height in the space, or for ceilings that are increasing in height as distance from the operable openings is increased, the ceiling height shall be determined as the average height of the ceiling within 20 feet from the operable opening. [ASHRAE 62.1:6.4.1]
Single side opening. For spaces with operable opening on one side of the space, the maximum distance from the operable opening shall be not more than 2H. [ASHRAE 62.1:6.4.1.1]
Double side opening. For spaces with operable openings on two opposite sides of the space, the maximum distance from the operable opening shall be not more than 5H. [ASHRAE 62.1:6.4.1.2]
Corner opening. For spaces with operable openings on two adjacent sides of a space, the maximum distance from the operable openings shall be not more than 5H along a line drawn between the two openings that are the farthest apart. Floor area outside that line shall comply with i or ii. [ASHRAE 62.1:6.4.1.3]
Ceiling height. The ceiling height (H) to be used in Section 120.1(c)2Ai through 120.1(c)2Aiii shall be the minimum ceiling height in the space.
Exception to Section 120.1(c)2Aiv: For ceilings that are increasing in height as distance from the opening is increased, the ceiling height shall be determined as the average height of the ceiling within 20 feet from the operable openings. [ASHRAE 62.1:6.4.1.4]
Location and size of openings. Spaces or portions of spaces to be naturally ventilated shall be permanently open to operable wall openings directly to the outdoors. The openable area shall be not less than 4 percent of the net occupiable floor area. Where openings are covered with louvers or otherwise obstructed, the openable area shall be based on the net free unobstructed area through the opening. Where interior rooms, or portions of rooms, without direct openings to the outdoors are ventilated through adjoining rooms, the opening between rooms shall be permanently unobstructed and have a free area of not less than 8 percent of the area of the interior room or less than 25 square feet. [ASHRAE 62.1:6.4.2]
Control and accessibility. The means to open the required operable opening shall be readily accessible to building occupants whenever the space is occupied. Controls shall be designed to coordinate operation of the natural and mechanical ventilation systems. [ASHRAE 62.1:6.4.3]
Exception 1 to Section 120.1(c)2: The mechanical ventilation system shall not be required where natural ventilation openings complying with 120.1(c)2 are either permanently open or have controls that prevent the openings from being closed during periods of expected occupancy.
Exception 2 to Section 120.1(c)2: The mechanical ventilation system shall not be required where the zone is not served by a space-conditioning system.
Mechanical ventilation. Occupiable spaces shall be ventilated with a mechanical ventilation system capable of providing an outdoor airflow rate to the zone (Vz) no less than Equation 120.1-F as described below:
Vz = Rt × Az	(Equation 120.1-F)
Where:
Rt	=	Total outdoor airflow rate required per unit area as determined from Table 120.1-A.
Az	=	Zone floor area, meaning the net occupiable floor area of the ventilation zone in square feet.

Exception 1 to Section 120.1(c)3: Designed occupancy. For spaces designed for an expected number of occupants per the Exception to Section 1004.5 of the CBC, or spaces with fixed seating per Section 1004.6 of the CBC, the outdoor airflow rate to the zone (Vz) shall be determined in accordance with Equation 120.1-G;
Vz = The larger of Rp × Pz or Ra × Az	(Equation 120.1-G) Where:
Rp	=	15 cubic feet per minute of outdoor airflow per person
Pz	=	The expected number of occupants. The expected number of occupants shall be the expected number specified by the building designer. For spaces with fixed seating, the expected number of occupants shall be determined in accordance with the California Building Code.
Ra	=	The minimum ventilation airflow rate allowed for DCV in Table 120.1-A. If Ra is not defined for an occupancy category, Ra = 0.
Az	=	Zone floor area, meaning the net occupiable floor area of the ventilation zone in square feet.
Exception 2 to Section 120.1(c)3: Transfer air. The rate of outdoor air required by Section 120.1(c)3 may be provided with air transferred from other ventilated space if:
Use of transfer air is in accordance with Section 120.1(g); and
The outdoor air that is supplied to all spaces combined, is sufficient to meet the requirements of Section 120.1(c)3 for each space individually.
Exhaust ventilation. The design exhaust airflow shall be determined in accordance with the requirements in Table 120.1-B. Exhaust makeup air shall be permitted to be any combination of outdoor air, recirculated air, or transfer air. [ASHRAE 62.1:6.5.1]
Operation and control requirements for minimum quantities of outdoor air.
Times of occupancy. The minimum rate of outdoor air required by Section 120.1(c) shall be supplied to each space at all times when the space is usually occupied.
Exception 1 to Section 120.1(d)1: Demand control ventilation. In intermittently occupied spaces that do not have processes or operations that generate dusts, fumes, mists, vapors or gasses and are not provided with local exhaust ventilation (such as indoor operation of internal combustion engines or areas designated for unvented food service preparation), the rate of outdoor air may be reduced if the ventilation system serving the space is controlled by a demand control ventilation device complying with Section 120.1(d)4 or by an occupant sensor ventilation control device complying with Section 120.1(d)5.
Exception 2 to Section 120.1(d)1: Temporary reduction. The rate of outdoor air provided to a space may be reduced below the level required by Section 120.1(c) for up to 30 minutes at a time if the average rate for each hour is equal to or greater than the required ventilation rate.
Pre-occupancy. The lesser of the minimum rate of outdoor air required by Section 120.1(c) or three complete air changes shall be supplied to the entire building during the one-hour period immediately before the building is normally occupied.
Required demand control ventilation. Demand ventilation controls complying with Section 120.1(d)4 are required for a space with a design occupant density, or a maximum occupant load factor for egress purposes in the CBC, greater than or equal to 25 people per 1,000 square feet (40 square feet or less per person) if the ventilation system serving the space has one or more of the following:
an air economizer; or
modulating outside air control; or
design outdoor airflow rate > 3,000 cfm

Exception 1 to Section 120.1(d)3: Where space exhaust is greater than the design ventilation rate specified in Section 120.1(c)3 minus 0.2 cfm per square foot of conditioned area.
Exception 2 to Section 120.1(d)3: Spaces that have processes or operations that generate dusts, fumes, mists, vapors or gases and are not provided with local exhaust ventilation, such as indoor operation of internal combustion engines or areas designated for unvented food service preparation, daycare sickrooms, science labs, barber shops or beauty and nail salons shall not install demand control ventilation.
Exception 3 to Section 120.1(d)3: Spaces with an area of less than 150 square feet, or a design occupancy of less than 10 people as specified by Section 120.1(c)3.
Demand control ventilation devices.
For each system with demand control ventilation (DCV), CO2 sensors shall be installed in each room that meets the criteria of Section 120.1(d)3 with no less than one sensor per 10,000 square feet of floor space. When a zone or a space is served by more than one sensor, a signal from any sensor indicating that CO2 is near or at the setpoint within the zone or space, shall trigger an increase in ventilation.
CO2 sensors shall be located in the room between 3 feet and 6 feet above the floor or at the anticipated height of the occupants’ heads.
Demand ventilation controls shall maintain CO2 concentrations less than or equal to 600 ppm plus the outdoor air CO2 concentration in all rooms with CO2 sensors.
Exception to Section 120.1(d)4C: The outdoor air ventilation rate is not required to be larger than the design outdoor air ventilation rate required by Section 120.1(c)3 regardless of CO2 concentration.
Outdoor air CO2 concentration shall be determined by one of the following:
CO2 concentration shall be assumed to be 400 ppm without any direct measurement; or
CO2 concentration shall be dynamically measured using a CO2 sensor located within 4 feet of the outdoor air intake.
When the system is operating during hours of expected occupancy, the controls shall maintain system outdoor air ventilation rates no less than the rate listed in Table 120.1-A for DCV, times the conditioned floor area for spaces with CO2 sensors, plus the rate required by Section 120.1(c)3 for other spaces served by the system, or the exhaust air rate, whichever is greater.
CO2 sensors shall be certified by the manufacturer to be accurate within plus or minus 75 ppm at a 600 and 1000 ppm concentration when measured at sea level and 25°C, factory calibrated and certified by the manufacturer to require calibration no more frequently than once every 5 years. Upon detection of sensor failure, the system shall provide a signal which resets to supply the minimum quantity of outside air to levels required by Section 120.1(c)3 to the zone serviced by the sensor at all times that the zone is occupied.
The CO2 sensor(s) reading for each zone shall be displayed continuously, and shall be recorded on systems with DDC to the zone level.
Occupant sensor ventilation control devices. Occupant sensing or ventilation controls are required for space-conditioning zones that are both permitted to have their ventilation air reduced to zero while in occupied-standby mode per Table 120.1-A and required to install occupant sensors to comply with Section 130.1(c)5, 6 and 7. Occupant sensor ventilation control devices used to reduce the rate of outdoor air flow when occupants are not present shall comply with the following:
Occupant sensors shall have suitable coverage and placement to detect occupants in the entire space ventilated. In 20 minutes or less after no occupancy is detected by any sensors covering the room, occupant sensing controls shall indicate a room is vacant.

When occupant sensors controlling lighting are also used for ventilation, the ventilation signal shall be independent of daylighting, manual lighting overrides or manual control of lighting.
When a single zone damper or a single zone system serves multiple rooms, there shall be an occupant sensor in each room and the zone shall not be considered vacant until all rooms in the zone are vacant.
One hour prior to normal scheduled occupancy, the occupant sensor ventilation control shall allow pre-occupancy purge as described in Section 120.1(d)2.
When the zone is scheduled to be occupied and occupant sensing controls in all rooms and areas served by the zone indicate the spaces are unoccupied, the zone shall be placed in occupied-standby mode.
In 5 minutes or less after entering occupied-standby mode, mechanical ventilation to the zone shall be shut off until the space becomes occupied or until ventilation is needed to provide space heating or conditioning. When mechanical ventilation is shut off to the zone, the ventilation system serving the zone shall reduce the system outside air rate by the amount of outside air required for the zone.
Where the system providing space conditioning also provides ventilation to the zone, in 5 minutes or less after entering occupied-standby mode, space-conditioning zone setpoints shall be reset in accordance with Section 120.2(e)3.
Ducting for zonal heating and cooling units. Where a return plenum is used to distribute outdoor air to a zonal heating or cooling unit, which then supplies the air to a space in order to meet the requirements of Section 120.1(c)3, the outdoor air shall be ducted to discharge either:
Within 5 feet of the unit; or
Within 15 feet of the unit, substantially toward the unit, and at a velocity not less than 500 feet per minute.
Design and control requirements for quantities of outdoor air.
All mechanical ventilation and space-conditioning systems shall be designed with and have installed ductwork, dampers and controls that allow design minimum outside air rates to be operated at no less than the larger of (1) the minimum levels specified in Section 120.1(c)3; or (2) the rate required for make- up of exhaust systems that are required for an exempt or covered process, for control of odors, or for the removal of contaminants within the space.
All variable air volume mechanical ventilation and space-conditioning systems shall include dynamic controls that are capable of maintaining measured outside air ventilation rates within 10 percent of the design minimum outside air ventilation rate at both full and reduced supply airflow conditions. Fixed minimum damper position is not considered to be dynamic and is not an allowed control strategy.
All mechanical ventilation and space-conditioning systems shall be tested to confirm their ability to operate within 10 percent of the design minimum outside air rate.
Air classification and recirculation limitations. Air classification and recirculation limitations of air shall be based on the air classification as listed in Table 120.1-A or Table 120.1-C, and in accordance with the requirements of Sections 120.1(g)1 through 4.
Note: Air class definitions are taken directly from ASHRAE 62.1 and are duplicated here for convenience.
Class 1 Air is air with low contaminant concentration, low sensory-irritation intensity or inoffensive odor. Recirculation or transfer of Class 1 air to any space shall be permitted; [ASHRAE 62.1:5.16.3.1]
Class 2 Air is air with moderate contaminant concentration, mild sensory-irritation intensity or mildly offensive odors (Class 2 air also includes air that is not necessarily harmful or objectionable but that is inappropriate for transfer or recirculation to spaces used for different purposes). Recirculation or transfer of Class 2 air shall be permitted in accordance with Sections 120.1(g)2A through 120.1(g)2E:
Recirculation of Class 2 air within the space of origin shall be permitted [ASHRAE 62.1:5.16.3.2.1];

Recirculation or transfer of Class 2 to other Class 2 or Class 3 spaces shall be permitted, provided that the other spaces are used for the same or similar purpose or task and involve the same or similar pollutant sources as the Class 2 space [ASHRAE 62.1:5.16.3.2.2]; or
Transfer of Class 2 air to toilet rooms [ASHRAE 62.1:5.16.3.2.3]; or
Recirculation or transfer of Class 2 air to Class 4 spaces [ASHRAE 62.1:5.16.3.2.4]; or
Class 2 air shall not be recirculated or transferred to Class 1 spaces. [ASHRAE 62.1:5.16.3.2.5]
Exception to Section 120.1(g)2E: When using any energy recovery device, recirculation from leakage, carryover, or transfer from the exhaust side of the energy recovery device is permitted. Recirculated Class 2 air shall not exceed 10 percent of the outdoor air intake flow.
Class 3 Air is air with significant contaminant concentration, significant sensory-irritation intensity or offensive odor. Recirculation or transfer of Class 3 air shall be permitted in accordance with 120.1(g)3A and B:
Recirculation of Class 3 air within the space of origin shall be permitted. [ASHRAE 62.1:5.16.3.3.1]
Class 3 air shall not be recirculated or transferred to any other space. [ASHRAE 62.1:5.16.3.3.2].
Exception to Section 120.1(g)3B: When using any energy recovery device, recirculation from leakage, carryover, or transfer from the exhaust side of the energy recovery device is permitted. Recirculated Class 3 air shall not exceed 5 percent of the outdoor air intake flow.
Class 4 Air is air with highly objectionable fumes or gases or with potentially dangerous particles, bioaerosols, or gases at concentrations high enough to be considered as harmful. Class 4 air shall not be recirculated or transferred to any space or recirculated within the space of origin. [ASHRAE 62.1:5.16.3.4]
Ancillary spaces. Redesignation of Class 1 air to Class 2 air shall be permitted for Class 1 spaces that are ancillary to Class 2 spaces. [ASHRAE 62.1:5.16.2.3]
Transfer. A mixture of air that has been transferred through or returned from spaces or locations with different air classes shall be redesignated with the highest classification among the air classes mixed. [ASHRAE 62.1:5.16.2.2]
Classification. Air leaving each space or location shall be designated at an expected air-quality classification not less than that shown in Tables 120.1-A, 120.1-B or 120.1-C. Air leaving spaces or locations that are not listed in Tables 120.1-A, 120.1-B or 120.1-C shall be designated with the same classification as air from the most similar space or location listed in terms of occupant activities and building construction.
Ventilation only mechanical systems. HVAC systems without mechanical cooling or mechanical heating shall meet the requirements of Section 120.2(f).

TABLE 120.1-A– Minimum Ventilation Rates

Occupancy Category	Total Outdoor Air Rate1 Rt (cfm/ft2)	Min Ventilation Air Rate for DCV
Ra (cfm/ft2)	
Air Class	

Notes	
Educational Facilities	
Daycare (through age 4)	0.21	0.15	2		
Daycare sickroom	0.15		3		
Classrooms (ages 5-8)	0.38	0.15	1		
Classrooms (age 9 -18)	0.38	0.15	1		
Lecture/postsecondary classroom	0.38	0.15	1	F	
Lecture hall (fixed seats)	-	0.15	1	F	
Art classroom	0.15		2		
Science laboratories	0.15		2		
University/college laboratories	0.15		2		
Wood/metal shop	0.15		2		
Computer lab	0.15		1		
Media center	0.15		1	A	
Music/theater/dance	1.07	0.15	1	F	
Multiuse assembly	0.5	0.15	1	F	

Occupancy Category	Total Outdoor Airflow
Rate1 Rt cfm/ft2	Min Ventilation Air Rate for DCV
Ra (cfm/ft2)	
Air Class	

Notes	
Food and Beverage Service	
Restaurant dining rooms	0.5	0.15	2		
Cafeteria/fast-food dining	0.5	0.15	2		
Bars, cocktail lounges	0.5	0.2	2		
Kitchen (cooking)	0.15		2		
General	
Break rooms	0.5	0.15	1	F	
Coffee Stations	0.5	0.15	1	F	
Conference/meeting	0.5	0.15	1	F	
Corridors	0.15		1	F	
Occupiable storage rooms for liquids or gels	0.15		2	B	
Hotels, Motels, Resorts, Dormitories	
Bedroom/living room	0.15		1	F	
Barracks sleeping areas	0.15		1	F	
Laundry rooms, central	0.15		2		
Laundry rooms within dwelling units	0.15		1		
Lobbies/pre-function	0.5	0.15	1	F	
Multipurpose assembly	0.5		1	F	
Office Buildings	
Breakrooms	0.5	0.15	1		
Main entry lobbies	0.5	0.15	1	F	
Occupiable storage rooms for dry materials	0.15		1		
Office space	0.15		1	F	
Reception areas	0.15		1	F	
Telephone/data entry	0.15		1	F	
Miscellaneous Spaces	
Bank vaults/safe deposit	0.15		2	F	
Banks or bank lobbies	0.15		1	F	
Computer (not printing)	0.15		1	F	
Freezer and refrigerated spaces (<50oF)	-		2	E	
General manufacturing (excludes heavy industrial and process using chemicals)	
0.15		
3		

Occupancy Category	Total Outdoor Airflow
Rate1 Rt cfm/ft2	Min Ventilation Air Rate for DCV
Ra (cfm/ft2)	
Air Class	

Notes	
Pharmacy (prep. Area)	0.15		2		
Photo studios	0.15		1		
Shipping/receiving	0.15		2	B	
Sorting, packing, light assembly	0.15		2		
Telephone closets	0.15		1		
Transportation waiting	0.5	0.15	1	F	
Warehouses	0.15		2	B	
All others	0.15		2		
Public Assembly Spaces	
Auditorium seating area	1.07	0.15	1	F	
Places of religious worship	1.07	0.15	1	F	
Courtrooms	0.19	0.15	1	F	
Legislative chambers	0.19	0.15	1	F	
Libraries (reading rooms and stack areas)	0.15		1		
Lobbies	0.5	0.15	1	F	
Museums (children’s)	0.25	0.15	1		
Museums/galleries	0.25	0.15	1	F	
Residential	
Common corridors	0.15		1	F	
Retail	
Sales (except as below)	0.25	0.2	2		
Mall common areas	0.25	0.15	1	F	
Barbershop	0.4		2		
Beauty and nail salons	0.4		2		
Pet shops (animal areas)	0.25	0.15	2		
Supermarket	0.25	0.2	1	F	
Coin-operated laundries	0.3		2		
Sports and Entertainment	
Gym, sports arena (play area)	0.5	0.15	2	E	
Spectator areas	0.5	0.15	1	F	
Swimming (pool)	0.15		2	C	

Occupancy Category	Total Outdoor Airflow
Rate1 Rt cfm/ft2	Min Ventilation Air Rate for DCV
Ra (cfm/ft2)	
Air Class	

Notes	
Swimming (deck)	0.5	0.15	2	C	
Disco/dance floors	1.5	0.15	2	F	
Health club/aerobics room	0.15		2		
Health club/weight rooms	0.15		2		
Bowling alley (seating)	1.07	0.15	1		
Gambling casinos	0.68	0.15	1		
Game arcades	0.68	0.15	1		
Stages, studios	0.5	0.15	1	D, F	
General footnotes for Table 120.1-A:
1 Rt is determined as being the larger of the area method and the default per person method. The occupant density used in the default per person method is one half of the maximum occupant load assumed for egress purposes in the CBC.
Specific Notes:
A – For high-school and college libraries, the values shown for “Public Assembly Spaces – Libraries” shall be used.
B – Rate may not be sufficient where stored materials include those having potentially harmful emissions.
C – Rate does not allow for humidity control. “Deck area” refers to the area surrounding the pool that is capable of being wetted during pool use or when the pool is occupied. Deck area that is not expected to be wetted shall be designated as an occupancy category.
D – Rate does not include special exhaust for stage effects such as dry ice vapors and smoke.
E – Where combustion equipment is intended to be used on the playing surface or in the space, additional dilution ventilation, source control, or both shall be provided.
F – Ventilation air for this occupancy category shall be permitted to be reduced to zero when the space is in occupied-standby mode.

Occupancy Category	Exhaust Rate, cfm/unit	Exhaust Rate, cfm/ft2	Air Class	Notes	
Arenas	-	0.50	1	B	
Art classrooms	-	0.70	2		
Auto repair rooms	-	1.5	2	A	
Barber shops	-	0.50	2		
Beauty and nail salons	-	0.60	2		
Cells with toilet	-	1.00	2		
Copy, printing rooms	-	0.50	2		
Darkrooms	-	1.00	2		
Educational science laboratories	-	1.00	2		
Janitor closets, trash rooms, recycling	-	1.00	3		
Kitchenettes	-	0.30	2		
Kitchens – commercial	-	0.70	2		
Locker rooms for athletic or industrial facilities	-	0.50	2		
All other locker rooms	-	0.25	2		
Shower rooms	20/50	-	2	G,H	
Paint spray booths	-	-	4	F	
Parking garages	-	0.75	2	C	
Pet shops (animal areas)	-	0.90	2		
Refrigerating machinery rooms	-	-	3	F	
Soiled laundry storage rooms	-	1.00	3	F	
Storage rooms, chemical	-	1.50	4	F	
Toilets – private	25/50	-	2	E	
Toilets – public	50/70	-	2	D	
Woodwork shop/classrooms	-	0.50	2		

Table 120.1-B – Minimum Exhaust Rates [ASHRAE 62.1: Table 6.5]

Notes:
A – Stands where engines are run shall have exhaust systems that directly connect to the engine exhaust and prevent escape of fumes.
B – Where combustion equipment is intended to be used on the playing surface, additional dilution ventilation, source control, or both shall be provided.
C – Exhaust shall not be required where two or more sides comprise walls that are at least 50% open to the outside.
D – Rate is per water closet, urinal, or both. Provide the higher rate where periods of heavy use are expected to occur. The lower rate shall be permitted to be used otherwise.
E – Rate is for a toilet room intended to be occupied by one person at a time. For continuous systems operation during hours of use, the lower rate shall be permitted to be used. Otherwise the higher rate shall be used.
F – See other applicable standards for exhaust rate.
G – For continuous system operation, the lower rate shall be permitted to be used. Otherwise the higher rate shall be used.
H – Rate is per showerhead

Page 166	2022 Building Energy Efficiency Standards

Description	Air Class	
Diazo printing equipment discharge	4	
Commercial kitchen grease hoods	4	
Commercial kitchen hoods other than grease	3	
Laboratory hoods	
4a	
Hydraulic elevator machine room	2	

Table 120.1‐C – Airstreams or Sources [ASHRAE 62.1:Table 5.16.1]

a. Air Class 4 unless determined otherwise by the Environmental Health and Safety professional responsible to the owner or to the owner’s designee.
Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.8, and 25943, Public Resources Code.

SECTION 120.1 – REQUIREMENTS FOR VENTILATION AND INDOOR AIR QUALITY

SECTION 120.2 – REQUIRED CONTROLS FOR SPACE‐CONDITIONING SYSTEMS
Nonresidential and hotel/motel buildings shall comply with the applicable requirements of Sections 120.2(a) through 120.2(k).
Thermostatic controls for each zone. The supply of heating and cooling energy to each space‐conditioning zone or dwelling unit shall be controlled by an individual thermostatic control that responds to temperature within the zone and that meets the applicable requirements of Section 120.2(b). An Energy Management Control System (EMCS) may be installed to comply with the requirements of one or more thermostatic controls if it complies with all applicable requirements for each thermostatic control.
Exception to Section 120.2(a): An independent perimeter heating or cooling system may serve more than one zone without individual thermostatic controls if:
All zones are also served by an interior cooling system; and
The perimeter system is designed solely to offset envelope heat losses or gains; and
The perimeter system has at least one thermostatic control for each building orientation of 50 feet or more; and
The perimeter system is controlled by at least one thermostat located in one of the zones served by the system.
Criteria for zonal thermostatic controls. The individual thermostatic controls required by Section 120.2(a) shall meet the following requirements as applicable:
Where used to control comfort heating, the thermostatic controls shall be capable of being set, locally or remotely, down to 55°F or lower.
Where used to control comfort cooling, the thermostatic controls shall be capable of being set, locally or remotely, up to 85°F or higher.
Where used to control both comfort heating and comfort cooling, the thermostatic controls shall meet Items 1 and 2 and shall be capable of providing a temperature range or dead band of at least 5°F within which the supply of heating and cooling energy to the zone is shut off or reduced to a minimum.
Exception 1 to Section 120.2(b)3: Systems with thermostats that require manual changeover between heating and cooling modes.
Exception 2 to Section 120.2(b)3: Systems serving healthcare facilities.
Thermostatic controls for all single zone, air conditioners and heat pumps shall comply with the requirements of Sections 110.2(c) and 110.12(a) and, if equipped with DDC to the Zone level, with the Automatic Demand Shed Controls of Section 110.12(b).
Exception 1 to Section 120.2(b)4: Systems serving exempt process loads that must have constant temperatures to prevent degradation of materials, a process, plants or animals.
Exception 2 to Section 120.2(b)4: Package terminal air conditioners, package terminal heat pumps, room air conditioners and room air conditioner heat pumps.
Exception 3 to Section 120.2(b)4: Systems serving healthcare facilities.
Hotel/motel guest room thermostats.
Hotel/motel guest room thermostats shall:
Have numeric temperature setpoints in °F and °C; and
Have setpoint stops, which are accessible only to authorized personnel, such that guest room occupants cannot adjust the setpoint more than ±5°F (±3°C); and
Meet the requirements of Section 110.2(c).

Exception to Section 120.2(c)1: Thermostats that are integrated into the room heating and cooling equipment.
Heat pump controls. All heat pumps with supplementary electric resistance heaters shall be installed with controls that comply with Section 110.2(b).
Shut‐off and reset controls for space‐conditioning systems. Each space‐conditioning system shall be installed with controls that comply with the following:
The control shall be capable of automatically shutting off the system during periods of nonuse and shall have:
An automatic time switch control device complying with Section 110.9 with an accessible manual override that allows operation of the system for up to 4 hours; or
An occupancy sensor; or
A 4‐hour timer that can be manually operated.
Exception to Section 120.2(e)1: Mechanical systems serving retail stores and associated malls, restaurants, grocery stores, churches and theaters equipped with 7‐day programmable timers.
The control shall automatically restart and temporarily operate the system as required to maintain:
A setback heating thermostat setpoint if the system provides mechanical heating; and
Exception to Section 120.2(e)2A: Thermostat setback controls are not required in nonresidential buildings in areas where the Winter Median of Extremes outdoor air temperature determined in accordance with Section 140.4(b)3 is greater than 32°F.
A setup cooling thermostat setpoint if the system provides mechanical cooling.
Exception to Section 120.2(e)2B: Thermostat setup controls are not required in nonresidential buildings in areas where the Summer Design Dry Bulb 0.5 percent temperature determined in accordance with Section 140.4(b)3 is less than 100°F.
Occupant sensing zone controls. Where the system providing space conditioning also provides the ventilation required by Section 120.1 and includes occupant sensor ventilation control as specified in Section 120.1(d)5, the occupant sensing zone controls shall additionally comply with the following:
In 5 minutes or less after entering occupied‐standby mode as described in Section 120.1(d).
Automatically set up the operating cooling temperature set point by 2°F or more and set back the operating heating temperature set point by 2°F or more; or
For multiple zone systems with Direct Digital Controls (DDC) to the zone level, setup the operating cooling temperature setpoint by 0.5°F or more and setback the operating heating temperature setpoint by 0.5°F or more.
In 5 minutes or less after entering occupied‐standby mode, mechanical ventilation to the zone shall remain off whenever the space temperature is between the active heating and cooling setpoints.
Exception 1 to Sections 120.2(e)1, 2, 3: Where it can be demonstrated to the satisfaction of the enforcing agency that the system serves an area that must operate continuously.
Exception 2 to Sections 120.2(e)1, 2, 3: Systems with full load demands of 2 kW or less, if they have a readily accessible manual shut‐off switch.
Exception 3 to Sections 120.2(e) 1 and 2: Systems serving hotel/motel guest rooms, if they have a readily accessible manual shut‐off switch.
Hotel and motel guest rooms shall have captive card key controls, occupancy sensing controls or automatic controls such that, no longer than 30 minutes after the guest room has been vacated, setpoints are set up at least +5°F (+3°C) in cooling mode and set down at least ‐5°F (‐3°C) in heating mode.

Exception to Section 120.2(e): Systems serving healthcare facilities.
Dampers for air supply and exhaust equipment. Outdoor air supply and exhaust equipment shall be installed with dampers that automatically close upon fan shutdown.
Exception 1 to Section 120.2(f): Equipment that serves an area that must operate continuously.
Exception 2 to Section 120.2(f): Gravity and other nonelectrical equipment that has readily accessible manual damper controls.
Exception 3 to Section 120.2(f): At combustion air intakes and shaft vents.
Exception 4 to Section 120.2(f): Where prohibited by other provisions of law.
Isolation area devices. Each space‐conditioning system serving multiple zones with a combined conditioned floor area of more than 25,000 square feet shall be designed, installed, and controlled to serve isolation areas.
Each zone, or any combination of zones not exceeding 25,000 square feet, shall be a separate isolation area.
Each isolation area shall be provided with isolation devices, such as valves or dampers, that allow the supply of heating or cooling to be reduced or shut off independently of other isolation areas.
Each isolation area shall be controlled by a device meeting the requirements of Section 120.2(e)1.
Exception to Section 120.2(g): Zones designed to be conditioned continuously.
Automatic demand shed controls. See Section 110.12 for requirements for automatic demand shed controls.
Economizer fault detection and diagnostics (FDD). All newly installed air handlers with a mechanical cooling capacity over 33,000 Btu/hr and an installed air economizer shall include a stand‐alone or integrated Fault Detection and Diagnostics (FDD) system in accordance with Subsections 120.2(i)1 through 120.2(i)8.
The following temperature sensors shall be permanently installed to monitor system operation: outside air, supply air, and when required for differential economizer operation a return air sensor, and
Temperature sensors shall have an accuracy of ±2°F over the range of 40°F to 80°F; and
The controller shall have the capability of displaying the value of each sensor; and
The controller shall provide system status by indicating the following conditions:
Free cooling available;
Economizer enabled;
Compressor enabled;
Heating enabled, if the system is capable of heating; and
Mixed‐air low limit cycle active.
The unit controller shall allow manual initiation of each operating mode so that the operation of cooling systems, economizers, fans and heating system can be independently tested and verified; and
Faults shall be reported in one of the following ways:
Reported to an Energy Management Control System regularly monitored by facility personnel.
Annunciated locally on one or more zone thermostats, or a device within five (5) feet of zone thermostat(s), clearly visible, at eye level, and meeting the following requirements:
On the thermostat, device, or an adjacent written sign, display instructions to contact appropriate building personnel or an HVAC technician; and
In buildings with multiple tenants, the annunciation shall either be within property management offices or in a common space accessible by the property or building manager.

Reported to a fault management application which automatically provides notification of the fault to a remote HVAC service provider.
The FDD system shall detect the following faults:
Air temperature sensor failure/fault;
Not economizing when it should;
Economizing when it should not;
Damper not modulating; and
Excess outdoor air.
The FDD System shall be certified by the Energy Commission as meeting requirements of Subsections 120.2(i)1 through 120.2(i)7 in accordance with Section 110.0 and JA6.3.
Exception to Section 120.2(i)8: FDD algorithms based in direct digital control systems are not required to be certified to the Energy Commission.
	Direct Digital Controls (DDC). Direct Digital Controls to the zone shall be provided as specified by Table 120.2‐A. The provided DDC system shall meet the control logic requirements of Sections 120.1(d), 110.12(a) and 110.12(b), and be capable of the following:
Monitoring zone and system demand for fan pressure, pump pressure, heating and cooling;
Transferring zone and system demand information from zones to air distribution system controllers and from air distribution systems to heating and cooling plant controllers;
Automatically detecting the zones and systems that may be excessively driving the reset logic and generate an alarm or other indication to the system operator;
Readily allow operator removal of zone(s) from the reset algorithm;
For new buildings, trending and graphically displaying input and output points; and
Resetting heating and cooling setpoints in all noncritical zones upon receipt of a signal from a centralized contact or software point as described in Section 110.12(b).

Table 120.2‐A DDC Applications and Qualifications
Building Status	Applications	Qualifications	
Newly Constructed Buildings	Air‐handling system and all zones served by the system	Individual systems supplying more than three zones and with design heating or cooling
capacity of 300 kBtu/h and larger	
Newly Constructed Buildings	Chilled water plant and all coils and terminal units served by the system	Individual plants supplying more than three zones and with design cooling capacity of 300 kBtu/h (87.9 kW) and larger	
Newly Constructed Buildings	Hot water plant and all coils and terminal units served by the system	Individual plants supplying more than three zones and with design heating capacity of 300 kBtu/h
(87.9 kW) and larger	
Additions or Alterations	Zone terminal unit such as VAV box	Where existing zones served by the same air‐handling, chilled
water, or hot water systems that have DDC	
Additions or Alterations	Air‐handling system or fan coil	Where existing air‐handling system(s) and fan coil(s) served by the same chilled or hot water
plant have DDC	
Additions or Alterations	New air‐handling system and all new zones served by the system	Individual systems with design heating or cooling capacity of 300 kBtu/h and larger and supplying more than three zones and more than 75 percent of
zones are new	
Additions or Alterations	New or upgraded chilled water plant	Where all chillers are new and plant design cooling capacity is 300 kBtu/h (87.9 kW) and larger	
Additions or Alterations	New or upgraded hot water plant	Where all boilers are new and plant design heating capacity is
300 kBtu/h (87.9 kW) and larger	

Optimum start/stop controls. Space conditioning systems with DDC to the zone level shall have optimum start/stop controls. The control algorithm shall, as a minimum, be a function of the difference between space temperature and occupied setpoint, the outdoor air temperature, and the amount of time prior to scheduled occupancy. Mass radiant floor slab systems shall incorporate floor temperature onto the optimum start algorithm.
Exception to Section 120.2(k): Systems that must operate continuously.
Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.8, and 25943, Public Resources Code.

SECTION 120.3 – REQUIREMENTS FOR PIPE INSULATION
Nonresidential and hotel/motel buildings shall comply with the applicable requirements of Sections 120.3(a) through 120.3(c).
General requirements. The piping conditions listed below for space‐conditioning and service water‐heating systems with fluid normal operating temperatures listed in Table 120.3‐A, shall have at least the amount of insulation specified in Subsection (c):
Space cooling systems. All refrigerant suction, chilled water, and brine fluid distribution systems.
Space heating systems. All refrigerant, steam, steam condensate and hot water fluid distribution systems.
Service water‐heating systems.
Recirculating system piping, including the supply and return piping to the water heater.
The first 8 feet of hot and cold outlet piping, including piping between a storage tank and a heat trap, for a nonrecirculating storage system.
Pipes that are externally heated.
Insulation conductivity shall be determined in accordance with ASTM C335 at the mean temperature listed in Table 120.3‐A, and shall be rounded to the nearest 1/100 Btu‐inch per hour per square foot per °F. Fluid distribution systems include all elements that are in series with the fluid flow, such as pipes, pumps, valves, strainers, coil u‐bends, and air separators, but not including elements that are not in series with the fluid flow, such as expansion tanks, fill lines, chemical feeders, and drains.
Exception to Section 120.3(a)2: Heat pump refrigerant vapor line shall be installed with a minimum of 0.5 inch thick or R‐3.0 insulation for nonresidential buildings and 0.75 inch thick or R‐6.0 insulation for residential buildings. No insulation is required on the refrigerant liquid line.
Insulation protection. Pipe insulation shall be protected from damage due to sunlight, moisture, equipment maintenance and wind. Protection shall, at minimum, include the following:
Pipe insulation exposed to weather shall be protected by a cover suitable for outdoor service. The cover shall be water retardant and provides shielding from solar radiation that can cause degradation of the material. Adhesive tape shall not be used to provide this protection.
Pipe insulation covering chilled water piping and refrigerant suction piping located outside the conditioned space shall include, or be protected by, a Class I or Class II vapor retarder. All penetrations and joints shall be sealed.
Pipe insulation buried below grade must be installed in a water proof and noncrushable casing or sleeve.
Insulation thickness
For insulation with a conductivity in the range shown in Table 120.3‐A for the applicable fluid temperature range, the insulation shall have the applicable minimum thickness or R‐value shown in Table 120.3‐A.
For insulation with a conductivity outside the range shown in Table 120.3‐A for the applicable fluid temperature range, the insulation shall have a minimum R‐value shown in Table 120.3‐A or thickness as calculated:

MINIMUM INSULATION THICKNESS EQUATION

T = PR

-K--

	

 1 +	t-- k – 1
PR

WHERE:
T	=	insulation thickness for material with conductivity K, inches. PR =	actual outside radius, inches.
t	=	Insulation thickness from Table 120.3‐A, inches.
K	=	Conductivity of alternate material at the mean rating temperature indicated in Table 120.3‐A for the applicable fluid temperature range, in Btu‐inch per hour per square foot per °F.
k	=	The lower value of the conductivity range listed in Table 120.3‐A for the applicable fluid temperature range, Btu‐inch per hour per square foot per °F.
Table 120.3‐A PIPE INSULATION THICKNESS
Fluid Operating Temperature Range
(°F)	Insulation Conductivity		Nominal Pipe Diameter (in inches)	
	Conductivity (in Btu∙in/h∙ft2∙
°F)	Mean Rating Temperature (°F)			
				< 1	1 to <1.5	1.5 to < 4	4 to < 8	8 and larger	
Space heating and Service Water Heating Systems (Steam, Steam Condensate, Refrigerant, Space Heating, Service Hot Water)	Minimum Pipe Insulation Required (Thickness in inches or R‐value)	
Above 350	0.32‐0.34	250	Inches	4.5	5.0	5.0	5.0	5.0	
			R‐value	R 37	R 41	R 37	R 27	R 23	
251‐350	0.29‐0.32	200	Inches	3.0	4.0	4.5	4.5	4.5	
			R‐value	R 24	R 34	R 35	R 26	R 22	
201‐250	0.27‐0.30	150	Inches	2.5	2.5	2.5	3.0	3.0	
			R‐value	R 21	R 20	R 17.5	R 17	R 14.5	
141‐200	0.25‐0.29	125	Inches	1.5	1.5	2.0	2.0	2.0	
			R‐value	R 11.5	R 11	R 14	R 11	R 10	
105‐140	0.22‐0.28	100	Inches	1.0	1.5	1.5	1.5	1.5	
			R‐value	R 7.7	R 12.5	R 11	R 9	R 8	
Fluid Operating Temperature Range
(°F)	Insulation Conductivity		Nominal Pipe Diameter (in inches)	
	Conductivity (in Btu∙in/h∙ft2∙
°F)	Mean Rating Temperature (°F)		< 1	1 to <1.5	1.5 to < 4	4 to < 8	8 and larger	
Space cooling systems (chilled water, refrigerant and brine)	Minimum Pipe Insulation Required (Thickness in inches or R‐value)1	
40‐60	0.21‐0.27	75	Inches	Nonres 0.5	Res 0.75	Nonres 0.5	Res 0.75	1.0	1.0	1.0	
			R‐value	Nonres R 3	Res R 6	Nonres R 3	Res R 5	R 7	R 6	R 5	
Below 40	0.20‐0.26	50	Inches	1.0	1.5	1.5	1.5	1.5	
			R‐value	R 8.5	R 14	R 12	R 10	R 9	
Footnote to Table 120.3‐A:
1. These thickness are based on energy efficiency considerations only. Issues such as water vapor permeability or surface condensation sometimes require vapor retarders or additional insulation.

Exception 1 to Section 120.3: Factory‐installed piping within space‐conditioning equipment certified under Section
110.1 or 110.2.
Exception 2 to Section 120.3: Piping that conveys fluids with a design operating temperature range between 60°F and 105°F.
Exception 3 to Section 120.3: Where the heat gain or heat loss to or from piping without insulation will not increase building source energy use.
Exception 4 to Section 120.3: Piping that penetrates framing members shall not be required to have pipe insulation for the distance of the framing penetration. Metal piping that penetrates metal framing shall use grommets, plugs, wrapping or other insulating material to assure that no contact is made with the metal framing.
Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and 25943, Public Resources Code.

SECTION 120.4 – REQUIREMENTS FOR AIR DISTRIBUTION SYSTEM DUCTS AND PLENUMS
Nonresidential and hotel/motel buildings shall comply with the applicable requirements of Sections 120.4(a) through 120.4(g).
Exception to Section 120.4: Systems serving healthcare facilities shall comply with the applicable requirements of the California Mechanical Code.
CMC compliance. All air distribution system ducts and plenums, including but not limited to building cavities, mechanical closets, air‐handler boxes and support platforms used as ducts or plenums, shall meet the requirements of the CMC Sections 601.0, 602.0, 603.0, 604.0, and 605.0, and ANSI/SMACNA‐006‐2006 HVAC Duct Construction Standards Metal and Flexible, 3rd Edition incorporated herein by reference. Connections of metal ducts and the inner core of flexible ducts shall be mechanically fastened. Openings shall be sealed with mastic, tape, aerosol sealant or other duct‐closure system that meets the applicable requirements of UL 181, UL 181A, or UL 181B. If mastic or tape is used to seal openings greater than 1/4 inch, the combination of mastic and either mesh or tape shall be used.
Portions of supply‐air and return‐air ducts conveying heated or cooled air located in one or more of the following spaces shall be insulated to a minimum installed level of R‐8:
Outdoors; or
In a space between the roof and an insulated ceiling; or
In a space directly under a roof with fixed vents or openings to the outside or unconditioned spaces; or
In an unconditioned crawlspace; or
In other unconditioned spaces.
Portions of supply‐air ducts that are not in one of these spaces, including ducts buried in concrete slab, shall be insulated to a minimum installed level of R‐4.2 or be enclosed in directly conditioned space.
Duct and plenum materials.
Factory‐fabricated duct systems.
All factory‐fabricated duct systems shall comply with UL 181 for ducts and closure systems, including collars, connections and splices, and be labeled as complying with UL 181. UL 181 testing may be performed by UL laboratories or a laboratory approved by the Executive Director.
All pressure‐sensitive tapes, heat‐activated tapes, and mastics used in the manufacture of rigid fiberglass ducts shall comply with UL 181 and UL 181A.
All pressure‐sensitive tapes and mastics used with flexible ducts shall comply with UL 181 and UL 181B.
All ductwork and plenums with pressure class ratings shall be constructed to Seal Class A. Joints and seams of duct systems and their components shall not be sealed with cloth‐back rubber adhesive duct tapes unless such tape is used in combination with mastic and drawbands.
Exception to Section 120.4(b)1D: Ductwork located in occupied space and exposed to view is not required to meet Seal Class A.
Field‐fabricated duct systems.
Factory‐made rigid fiberglass and flexible ducts for field‐fabricated duct systems shall comply with UL
181. All pressure‐sensitive tapes, mastics, aerosol sealants or other closure systems used for installing field‐fabricated duct systems shall meet the applicable requirements of UL 181, UL 181A and UL 181B.
Mastic sealants and mesh.

Sealants shall comply with the applicable requirements of UL 181, UL 181A and UL 181B, and be nontoxic and water resistant.
Sealants for interior applications shall pass ASTM C731 (extrudability after aging) and D2202 (slump test on vertical surfaces), incorporated herein by reference.
Sealants for exterior applications shall pass ASTM tests C731, C732 (artificial weathering test), and D2202, incorporated herein by reference.
Sealants and meshes shall be rated for exterior use.
Pressure‐sensitive tape. Pressure‐sensitive tapes shall comply with the applicable requirements of UL 181, UL 181A and UL 181B.
All ductwork and plenums with pressure class ratings shall be constructed to Seal Class A. Joints and seams of duct systems and their components shall not be sealed with cloth‐back rubber adhesive duct tapes unless such tape is used in combination with mastic and drawbands.
Exception to Section 120.4(b)2D: Ductwork located in occupied space and exposed to view is not required to meet Seal Class A.

Drawbands used with flexible duct.
Drawbands shall be either stainless‐steel worm‐drive hose clamps or UV‐resistant nylon duct ties.
Drawbands shall have a minimum tensile strength rating of 150 pounds.
Drawbands shall be tightened as recommended by the manufacturer with an adjustable tensioning tool.
Aerosol‐sealant closures.
Aerosol sealants shall meet the requirements of UL 723 and be applied according to manufacturer specifications.
Tapes or mastics used in combination with aerosol sealing shall meet the requirements of this section.
All duct insulation product R‐values shall be based on insulation only (excluding air films, vapor retarders or other duct components) and tested C‐values at 75°F mean temperature at the installed thickness, in accordance with ASTM C518 or ASTM C177, incorporated herein by reference, and certified pursuant to Section 110.8.
The installed thickness of duct insulation used to determine its R‐value shall be determined as follows:
For duct board, duct liner and factory‐made rigid ducts not normally subjected to compression, the nominal insulation thickness shall be used.
For duct wrap, installed thickness shall be assumed to be 75 percent (25 percent compression) of nominal thickness.
For factory‐made flexible air ducts, the installed thickness shall be determined by dividing the difference between the actual outside diameter and nominal inside diameter by two.
Insulated flexible duct products installed to meet this requirement must include labels, in maximum intervals of 3 feet, showing the thermal performance R‐value for the duct insulation itself (excluding air films, vapor retarder or other duct components), based on the tests in Section 120.4(c) and the installed thickness determined by Section 120.4(d)3.
Protection of insulation. Insulation shall be protected from damage, including that due to sunlight, moisture, equipment maintenance and wind, but not limited to the following:

Insulation exposed to weather shall be suitable for outdoor service, e.g., protected by aluminum, sheet metal, painted canvas or plastic cover. Cellular foam insulation shall be protected as above or painted with a coating that is water retardant and provides shielding from solar radiation that can cause degradation of the material.
Duct sealing. Duct systems shall comply with Subsection 1 or 2 below:
New duct systems that meet the criteria in Subsections A, B, C and D below shall be sealed to a leakage rate not to exceed 6 percent of the nominal air handler airflow rate as confirmed through HERS field verification and diagnostic testing, in accordance with Reference Nonresidential Appendix NA7.5.3;
The duct system does not serve a healthcare facility; and
The duct system provides conditioned air to an occupiable space for a constant volume, single zone, space‐conditioning system; and
The space‐conditioning system serves less than 5,000 square feet of conditioned floor area; and
The combined surface area of the ducts located outdoors or in unconditioned space is more than 25 percent of the total surface area of the entire duct system.
New duct systems that are not subject to testing under Section 120.4(g)1 shall instead meet the duct leakage testing requirements of CMC Section 603.9.2.
Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.8, and 25943, Public Resources Code.

SECTION 120.5 – REQUIRED NONRESIDENTIAL MECHANICAL SYSTEM ACCEPTANCE
Nonresidential and hotel/motel buildings shall comply with the applicable requirements of Sections 120.5(a) through 120.5(b).
Exception to Section 120.5: Systems serving healthcare facilities.
Before an occupancy permit is granted, the following equipment and systems shall be certified as meeting the Acceptance Requirements for Code Compliance, as specified by the Reference Nonresidential Appendix NA7. A Certificate of Acceptance shall be submitted to the enforcement agency that certifies that the equipment and systems meet the acceptance requirements:
Outdoor air ventilation systems shall be tested in accordance with NA7.5.1.
Constant volume, single zone air conditioning and heat pump unit controls shall be tested in accordance with NA7.5.2.
Duct systems that are subject to testing under Section 120.4(g)1, Section 141.0(b)2Di or Section 141.0(b)2Dii shall be tested in accordance with NA7.5.3.
Air economizers shall be tested in accordance with NA7.5.4.
Exception to Section 120.5(a)4: Air economizers installed by the HVAC system manufacturer and certified to the Commission as being factory calibrated and tested are exempt from the Functional Testing section of the air economizer controls acceptance test as described in NA7.5.4.2.
Demand control ventilation systems required by Section 120.1(c)3 shall be tested in accordance with NA7.5.5.
Supply fan variable flow controls shall be tested in accordance with NA7.5.6.
Hydronic system variable flow controls shall be tested in accordance with NA7.5.7 and NA7.5.9.
Boiler or chillers that require isolation controls as specified by Section 140.4(k)2 or 140.4(k)3 shall be tested in accordance with NA7.5.7.
Hydronic systems with supply water temperature reset controls shall be tested in accordance with NA7.5.8.
Automatic demand shed controls shall be tested in accordance with NA7.5.10.
Fault Detection and Diagnostics (FDD) for Packaged Direct‐Expansion Units shall be tested in accordance with NA7.5.11.
Automatic fault detection and diagnostics (FDD) for air handling units and zone terminal units shall be tested in accordance with NA7.5.12.
Distributed Energy Storage DX AC Systems shall be tested in accordance with NA7.5.13.
Thermal Energy Storage (TES) Systems shall be tested in accordance with NA7.5.14.
Supply air temperature reset controls shall be tested in accordance with NA7.5.15.
Water‐cooled chillers served by cooling towers with condenser water reset controls shall be tested in accordance with NA7.5.16.
When an energy management control system is installed, it shall functionally meet all of the applicable requirements of Part 6.
Occupant sensing zone controls shall be tested in accordance with NA7.5.17.

When certification is required by Title 24, Part 1, Section 10‐103.2, the acceptance testing specified by Section 120.5(a) shall be performed by a certified mechanical acceptance test technician (CMATT). If the CMATT is operating as an employee, the CMATT shall be employed by a certified mechanical acceptance test employer. The CMATT shall disclose on the certificate of acceptance a valid CMATT certification identification number issued by an approved acceptance test technician certification provider. The CMATT shall complete all certificate of acceptance documentation in accordance with the applicable requirements in Section 10‐103(a)4.

Note: Authority cited: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference:
Sections 25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.8, 25943, Public Resources Code.

SECTION 120.6 – MANDATORY REQUIREMENTS FOR COVERED PROCESSES
Nonresidential and hotel/motel buildings shall comply with the applicable requirements of Sections 120.6(a) through 120.6(g).
Mandatory requirements for refrigerated warehouses.
Refrigerated warehouses that are greater than or equal to 3,000 square feet and refrigerated spaces with a sum total of 3,000 square feet or more that are served by the same refrigeration system shall meet the requirements of Section 120.6(a).
Refrigerated spaces that are less than 3,000 square feet shall meet the requirements of the Appliance Efficiency Regulations for walk‐in coolers or freezers contained in the Appliance Efficiency Regulations (California Code of Regulations, Title 20, Sections 1601 through 1608).
Insulation requirements. Exterior surfaces of refrigerated warehouses shall be insulated at least to the R‐ values in Table 120.6‐A.
TABLE 120.6‐A REFRIGERATED WAREHOUSE INSULATION
SPACE	SURFACE	MINIMUM R‐VALUE (ºF∙hr∙sf/Btu)	
Freezers	Roof/Ceiling	R‐40	
Freezers	Wall	R‐36	
Freezers	Floor	R‐35	
Freezers	Floor with all heating from productive refrigeration capacity1	R‐20	
Coolers	Roof/Ceiling	R‐28	
Coolers	Wall	R‐28	
Footnote to TABLE 120.6‐A:
1All underslab heating is provided by a heat exchanger that provides refrigerant subcooling or other means that result in productive refrigeration capacity on the associated refrigerated system.
Underslab heating. Electric resistance heat shall not be used for the purposes of underslab heating.
Exception to Section 120.6(a)2: Underslab heating systems controlled such that the electric resistance heat is thermostatically controlled and disabled during the summer on‐peak period defined by the local electric utility.
Evaporators. New fan‐powered evaporators used in coolers and freezers shall conform to the following:
Single phase fan motors less than 1 hp and less than 460 Volts in newly installed evaporators shall be electronically‐commutated motors or shall have a minimum motor efficiency of 70 percent when rated in accordance with NEMA Standard MG 1‐2006 at full load rating conditions.
Evaporator fans served either by a suction group with multiple compressors or by a single compressor with variable capacity capability shall be variable speed and the speed shall be controlled in response to space temperature or humidity.
Exception 1 to Section 120.6(a)3B: Addition, alteration or replacement of less than all of the evaporators in an existing refrigerated space that does not have speed‐controlled evaporators.
Exception 2 to Section 120.6(a)3B: Coolers within refrigerated warehouses that maintain a controlled atmosphere for which a licensed engineer has certified that the types of products stored will require constant operation at 100 percent of the design airflow.
Exception 3 to Section 120.6(a)3B: Areas within refrigerated warehouses that are designed solely for the purpose of quick chilling/freezing of products, including but not limited to spaces with design cooling capacities of greater than 240 Btu/hr‐ft2 (2 tons per 100 square feet).

Evaporator fans served by a single compressor that does not have variable capacity shall utilize controls to reduce airflow by at least 40 percent for at least 75 percent of the time when the compressor is not running.
Exception to Section 120.6(a)3C: Areas within refrigerated warehouses that are designed solely for the purpose of quick chilling/freezing of products (space with design cooling capacities of greater than 240 Btu/hr‐ft2 (2 tons per 100 ft²)).
Condensers. New fan‐powered condensers on new refrigeration systems shall conform to the following:
Design saturated condensing temperatures for evaporative‐cooled condensers and water‐cooled condensers served by fluid coolers or cooling towers shall be less than or equal to:
The design wetbulb temperature plus 20°F in locations where the design wetbulb temperature is less than or equal to 76°F;
The design wetbulb temperature plus 19°F in locations where the design wetbulb temperature is between 76°F and 78°F; or
The design wetbulb temperature plus 18°F in locations were the design wetbulb temperature is greater than or equal to 78°F.
Exception 1 to Section 120.6(a)4A: Compressors and condensers on a refrigeration system for which more than 20 percent of the total design refrigeration cooling load is for quick chilling/freezing of products (space with design cooling capacities of greater than 240 Btu/hr‐ft2), or process refrigeration cooling for other than a refrigerated space.
Design saturated condensing temperatures for air‐cooled condensers shall be less than or equal to:
The design drybulb temperature plus 10°F for systems serving freezers;
The design drybulb temperature plus 15°F for systems serving coolers.
Exception 1 to Section 120.6(a)4B: Condensing units with a total compressor horsepower less than 100 HP.
Exception 2 to Section 120.6(a)4B: Compressors and condensers on a refrigeration system for which more than 20 percent of the total design refrigeration cooling load is for quick chilling/freezing of products (space with design cooling capacities of greater than 240 Btu/hr‐ft2), or process refrigeration cooling for other than a refrigerated space.
The saturated condensing temperature necessary for adiabatic condensers to reject the design total heat of rejection of a refrigeration system assuming dry mode performance shall be less than or equal to:
The design drybulb temperature plus 20°F for systems serving freezers;
The design drybulb temperature plus 30°F for systems serving coolers.
Exception 1 to Section 120.6(a)4C: Compressors and condensers on a refrigeration system for which more than 20 percent of the total design refrigeration cooling load is for quick chilling/freezing of products (space with design cooling capacities of greater than 240 Btu/hr‐ft2 (2 tons per 100 ft2)), or process refrigeration cooling for other than a refrigerated space.
All condenser fans for air‐cooled condensers, evaporative‐cooled condensers, adiabatic condensers, gas coolers, air or water fluid coolers or cooling towers shall be continuously variable speed, with the speed of all fans serving a common condenser high side controlled in unison.
The minimum condensing temperature setpoint shall be less than or equal to 70°F for systems utilizing air‐cooled condensers, evaporative‐cooled condensers, adiabatic condensers, gas coolers, air or water‐cooled fluid coolers or cooling towers for heat rejection.
Condensing temperature reset. The condensing temperature set point of systems served by air‐cooled condensers shall be reset in response to ambient drybulb temperature. The condensing temperature

set point of systems served by evaporative‐cooled condensers or water‐cooled condensers (via cooling towers or fluid coolers) shall be reset in response to ambient wetbulb temperatures. The condensing temperature set point for systems served by adiabatic condensers shall be reset in response to ambient drybulb temperature while operating in dry mode.
Exception 1 to Section 120.6(a)4F: Condensing temperature control strategies approved by the Executive Director that have been demonstrated to provide at least equal energy savings.
Exception 2 to Section 120.6(a)4F: Systems served by adiabatic condensers in Climate Zones 1, 3, 5, 12, 14 and 16.
Fan‐powered condensers shall meet the condenser efficiency requirements listed in Table 120.6‐B. Condenser efficiency is defined as the total heat of rejection (THR) capacity divided by all electrical input power including fan power at 100 percent fan speed, and power of spray pumps for evaporative condensers.
Exception to Section 120.6(a)4G: Adiabatic condensers with ammonia as refrigerant.
Air‐cooled condensers shall have a fin density no greater than 10 fins per inch.
Exception to Section 120.6(a)4H: Micro‐channel condensers.
Exception to Section 120.6(a)4: Transcritical CO2 refrigeration systems.
Table 120.6‐B FAN‐POWERED CONDENSERS – MINIMUM EFFICIENCY REQUIREMENTS
CONDENSER TYPE	REFRIGERANT TYPE	MINIMUM EFFICIENCY	RATING CONDITION	
Outdoor Evaporative‐ Cooled with THR Capacity > 8,000 MBH	All	350 Btuh/watt	100°F Saturated Condensing Temperature (SCT), 70°F Outdoor Wetbulb Temperature	
Outdoor Evaporative‐ Cooled with THR Capacity < 8,000 MBH and Indoor Evaporative‐Cooled	All	160 Btuh/watt	100°F Saturated Condensing Temperature (SCT), 70°F Outdoor Wetbulb Temperature	
Outdoor Air‐Cooled	Ammonia	75 Btuh/watt	105°F Saturated Condensing Temperature (SCT), 95°F Outdoor Drybulb Temperature	
Outdoor Air‐Cooled	Halocarbon	65 Btuh/watt	105°F Saturated Condensing Temperature (SCT), 95°F Outdoor Drybulb Temperature	
Adiabatic Dry Mode	Halocarbon	45 Btuh/watt	105°F Saturated Condensing Temperature (SCT), 95°F Outdoor Drybulb Temperature	
Indoor Air‐Cooled	All	Exempt	Exempt	
Compressors. Compressor systems utilized in refrigerated warehouses shall conform to the following:
Compressors serving refrigeration systems that are not transcritical CO2 shall be designed to operate at a minimum condensing temperature of 70°F or less.

Compressors for transcritical CO2 refrigeration systems shall be designed to operate at a minimum condensing temperature of 60°F or less.
Exception to Section 120.6(a)5B: Compressors with a design saturated suction temperature greater than or equal to 30°F shall be designed to operate at a minimum condensing temperature of 70°F or less.
New open‐drive screw compressors in new refrigeration systems with a design saturated suction temperature (SST) of 28°F or lower that discharges to the system condenser pressure shall control compressor speed in response to the refrigeration load.
Exception 1 to Section 120.6(a)5C: Refrigeration plants with more than one dedicated compressor per suction group.
Exception 2 to Section 120.6(a)5C: Compressors and condensers on a refrigeration system for which more than 20 percent of the total design refrigeration cooling load is for quick chilling/ freezing of products (space with design cooling capacities of greater than 240 Btu/hr‐ft2 (2 tons per 100 ft2)) or process refrigeration cooling for other than a refrigerated space.
New screw compressors with nominal electric motor power greater than 150 HP shall include the ability to automatically vary the compressor volume ratio (Vi) in response to operating pressures.
Infiltration barriers. Passageways between freezers and higher‐temperature spaces, and passageways between coolers and nonrefrigerated spaces, shall have an infiltration barrier consisting of strip curtains, an automatically‐closing door or an air curtain designed by the manufacturer for use in the passageway and temperature for which it is applied.
Exception 1 to Section 120.6(a)6: Openings with less than 16 square feet of opening area.
Exception 2 to Section 120.6(a)6: Dock doorways for trailers.
Refrigerated warehouse acceptance. Before an occupancy permit is granted for a new refrigerated warehouse, or before a new refrigeration system serving a refrigerated warehouse is operated for normal use, the following equipment and systems shall be certified as meeting the acceptance requirements for code compliance, as specified by the Reference Nonresidential Appendix NA7. A certificate of acceptance shall be submitted to the enforcement agency that certifies that the equipment and systems meet the acceptance requirements:
Electric resistance underslab heating systems shall be tested in accordance with NA7.10.1.
Evaporators fan motor controls shall be tested in accordance with NA7.10.2.
Evaporative condensers shall be tested in accordance with NA7.10.3.1.
Air‐Cooled condensers shall be tested in accordance with NA7.10.3.2.
Adiabatic condensers shall be tested in accordance with NA7.10.3.3.
Variable speed compressors shall be tested in accordance with NA7.10.4.
Transcritical CO2 refrigeration systems shall be tested in accordance with NA7.20.1.
Transcritical CO2 gas coolers. New fan‐powered gas coolers on all new transcritical CO2 refrigeration systems shall conform to the following:
Air‐cooled gas coolers are prohibited in Climate Zones 9 through 15.
Design leaving gas temperature for air‐cooled gas coolers shall be less than or equal to the design dry‐ bulb temperature plus 6°F.
Exception to Section 120.6(a)8B: Design leaving gas temperature for air‐cooled gas coolers in Climate Zones 2, 4 and 8 shall be less than or equal to the design dry‐bulb temperature plus 8°F.

Design leaving gas temperature for adiabatic gas coolers necessary to reject the design total heat of rejection of a refrigeration system assuming dry mode performance shall be less than or equal to the design dry‐bulb temperature plus 15°F.
All gas cooler fans shall be continuously variable speed, with the speed of all fans serving a common condenser high side controlled in unison.
While operating below the critical point, the gas cooler pressure shall be controlled in accordance with Section 120.6(a)4F.
While operating above the critical point, the gas cooler pressure setpoint shall be reset based on ambient conditions such that the system efficiency is maximized.
The minimum condensing temperature setpoint shall be less than or equal to 60°F for systems utilizing air‐cooled gas coolers, evaporative‐cooled gas coolers, adiabatic gas coolers, air or water‐ cooled fluid coolers or cooling towers for heat rejection.
Exception to Section 120.6(a)8G: Transcritical CO2 refrigeration systems with a design intermediate saturated suction temperature greater than or equal to 30°F shall have a minimum condensing temperature setpoint of 70°F or less.
Fan‐powered gas coolers shall meet the gas cooler efficiency requirements listed in Table 120.6‐C. Gas cooler efficiency is defined as the Total Heat of Rejection (THR) capacity divided by all electrical input power (fan power at 100 percent fan speed).
Table 120.6‐C TRANSCRITICAL CO2 FAN‐POWERED GAS COOLERS – MINIMUM EFFICIENCY REQUIREMENTS
CONDENSER TYPE	REFRIGERANT TYPE	MINIMUM EFFICIENCY	RATING CONDITION	
Outdoor Air‐Cooled	Transcritical CO2	160 Btuh/watt	1400 psig, 100°F Outlet Gas Temperature, 90°F Outdoor
Dry bulb Temperature	
Adiabatic Dry Mode	Transcritical CO2	90 Btuh/watt	1100 psig, 100°F Outlet Gas
Temperature, 90°F Outdoor Dry bulb Temperature	
Automatic door closers. Doors designed for the passage of people that are between freezers and higher‐ temperature spaces, or between coolers and nonrefrigerated spaces, shall have automatic door closers.
Mandatory requirements for commercial refrigeration.
Retail food or beverage stores with 8,000 square feet or more of conditioned floor area, and that utilize either refrigerated display cases, or walk‐in coolers or freezers shall meet all applicable state and federal appliance and equipment standards consistent with Section 110.0 and 110.1 or, for equipment not subject to such standards, the requirements of Subsections 1 through 4.
Condensers serving refrigeration systems. Fan‐powered condensers shall conform to the following requirements:
All condenser fans for air‐cooled condensers, evaporative‐cooled condensers, adiabatic condensers, gas coolers, air‐ or water‐cooled fluid coolers or cooling towers shall be continuously variable speed, with the speed of all fans serving a common condenser high side controlled in unison.
The refrigeration system condenser controls for systems with air‐cooled condensers shall use variable‐ setpoint control logic to reset the condensing temperature setpoint in response to ambient drybulb temperature.
The refrigeration system condenser controls for systems with evaporative‐cooled condensers shall use variable‐setpoint control logic to reset the condensing temperature setpoint in response to ambient wetbulb temperature.
The refrigeration system condenser controls for systems with adiabatic condensers shall use variable setpoint control logic to reset the condensing temperature setpoint in response to ambient drybulb temperature while operating in dry mode.

Exception 1 to Section 120.6(b)1B, C and D: Condensing temperature control strategies approved by the executive director that have been demonstrated to provide equal energy savings.
Exception 2 to Section 120.6(b)1D: Systems served by adiabatic condensers in Climate Zone 16.
The saturated condensing temperature necessary for adiabatic condensers to reject the design total heat of rejection of a refrigeration system assuming dry mode performance shall be less than or equal to:
The design drybulb temperature plus 20°F for systems serving freezers;
The design drybulb temperature plus 30°F for systems serving coolers.
The minimum condensing temperature setpoint shall be less than or equal to 70°F.
Fan‐powered condensers shall meet the specific efficiency requirements listed in Table 120.6‐D.

Table 120.6‐D FAN‐POWERED CONDENSERS –SPECIFIC EFFICIENCY REQUIREMENTS
CONDENSER TYPE	MINIMUM SPECIFIC EFFICIENCYa	RATING CONDITION	
Evaporative‐Cooled	160 Btuh/watt	100°F Saturated Condensing Temperature (SCT), 70°F Entering Wetbulb Temperature	
Air‐Cooled	65 Btuh/watt	105°F Saturated Condensing Temperature (SCT), 95°F Entering Drybulb Temperature	
Adiabatic Dry Mode	45 Btu/watt (halocarbon)	105°F Saturated Condensing Temperature (SCT), 95°F Entering Drybulb Temperature	
aSee Section 100.1 for definition of condenser specific efficiency.

Exception 1 to Section 120.6(b)1G: Condensers with a total heat rejection capacity of less than 150,000 Btuh at the specific efficiency rating condition.
Exception 2 to Section 120.6(b)1G: Stores located in Climate Zone 1.
Exception 3 to Section 120.6(b)1G: Existing condensers that are reused for an addition or alteration.
Air‐cooled condensers shall have a fin density no greater than 10 fins per inch.
Exception 1 to Section 120.6(b)1H: Microchannel condensers.
Exception 2 to Section 120.6(b)1H: Existing condensers that are reused for an addition or alteration.
Exception to Section 120.6(b)1B, 1C, 1D, 1E, 1F, 1G: Transcritical CO2 refrigeration systems.
Exception to Section 120.6(b)1: New condensers replacing existing condensers when the attached compressor system total heat of rejection does not increase and less than 25 percent of both the attached compressors and the attached display cases are new.
Compressor systems. Refrigeration compressor systems and condensing units shall conform to the following requirements:
Compressors and multiple‐compressor suction groups shall include control systems that use floating suction pressure logic to reset the target saturated suction temperature based on the temperature requirements of the attached refrigeration display cases or walk‐ins.
Exception 1 to Section 120.6(b)2A: Single compressor systems that do not have continuously variable capacity capability.
Exception 2 to Section 120.6(b)2A: Suction groups that have a design saturated suction temperature of 30°F or higher, or suction groups that comprise the high stage of a two‐stage or cascade system or that primarily serve chillers for secondary cooling fluids.
Liquid subcooling shall be provided for all low temperature compressor systems with a design cooling capacity equal or greater than 100,000 Btu/hr with a design saturated suction temperature of ‐10°F or lower, with the subcooled liquid temperature maintained continuously at 50°F or less at the exit of the subcooler, using compressor economizer port(s) or a separate medium or high temperature suction group operating at a saturated suction temperature of 18°F or higher.
Exception 1 to Section 120.6(b)2B: Low temperature cascade systems that condense into another refrigeration system rather than condensing to ambient temperature.
Exception 2 to Section 120.6(b)2B: Transcritical CO2 refrigeration systems.
Compressors for transcritical CO2 refrigeration systems shall be designed to operate at a minimum condensing temperature of 60°F or less.

Exception to Section 120.6(b)2C: Compressors with a design saturated suction temperature greater than or equal to 30°F shall be designed to operate at a minimum condensing temperature of 70°F or less.
Exception to Section 120.6(b)2: Existing compressor systems that are reused for an addition or alteration.
Refrigerated display cases. Lighting in refrigerated display cases, and lights on glass doors installed on walk‐in coolers and freezers shall be controlled by one of the following:
Automatic time switch controls to turn off lights during nonbusiness hours. Timed overrides for any line‐up or walk‐in case may only be used to turn the lights on for up to one hour. Manual overrides shall time‐out automatically to turn the lights off after one hour.
Motion sensor controls on each case that reduce display case lighting power by at least 50 percent within 30 minutes after the area near the case is vacated.
Refrigeration heat recovery.
HVAC systems shall utilize heat recovery from refrigeration system(s) for space heating, using no less than 25 percent of the sum of the design total heat of rejection of all refrigeration systems that have individual total heat of rejection values of 150,000 Btu/h or greater at design conditions.
Exception 1 to Section 120.6(b)4A: Stores located in Climate Zone 15.
Exception 2 to Section 120.6(b)4A: HVAC systems or refrigeration systems that are reused for an addition or alteration.
Exception 3 to Section 120.6(b)4A: Stores where the design total heat of rejection of all refrigeration systems is less than or equal to 500,000 Btu/h.
The increase in hydrofluorocarbon refrigerant charge associated with refrigeration heat recovery equipment and piping shall be no greater than 0.35 lbs per 1,000 Btu/h of heat recovery heating capacity.
Transcritical CO2 Gas Coolers. New fan‐powered gas coolers on all new transcritical CO2 refrigeration systems shall conform to the following:
Air‐cooled gas coolers are prohibited in Climate Zones 10 through 15.
Design leaving gas temperature for air‐cooled gas coolers shall be less than or equal to the design dry‐ bulb temperature plus 6°F.
Design leaving gas temperature for adiabatic gas coolers necessary to reject the design total heat of rejection of a refrigeration system assuming dry mode performance shall be less than or equal to the design dry‐bulb temperature plus 15°F.
All gas cooler fans shall be continuously variable speed, with the speed of all fans serving a common condenser high side controlled in unison.
While operating below the critical point, the gas cooler pressure shall be controlled in accordance with Section 120.6(b)1A.
While operating above the critical point, the gas cooler pressure setpoint shall be reset based on ambient conditions such that the system efficiency is maximized.
The minimum condensing temperature setpoint shall be less than or equal to 60°F for air‐cooled gas coolers, evaporative‐cooled gas coolers, adiabatic gas coolers, air or water‐cooled fluid coolers or cooling towers.
Exception to Section 120.6(b)5G: Transcritical CO2 refrigeration systems with a design intermediate saturated suction temperature greater than or equal to 30°F shall have a minimum condensing temperature setpoint of 70°F or less.

Fan‐powered gas coolers shall meet the condenser efficiency requirements listed in Table 120.6‐E. Gas cooler efficiency is defined as the total heat of rejection (THR) capacity divided by all electrical input power (fan power at 100‐percent fan speed).
Table 120.6‐E TRANSCRITICAL CO2 FAN‐POWERED GAS COOLERS – MINIMUM EFFICIENCY REQUIREMENTS
CONDENSER TYPE	REFRIGERANT TYPE	MINIMUM EFFICIENCY	RATING CONDITION	
Outdoor Air‐Cooled	Transcritical CO2	160 Btuh/watt	1400 psig, 100°F Outlet Gas	
			Temperature, 90°F Outdoor	
			Dry bulb Temperature	
Adiabatic Dry Mode	Transcritical CO2	90 Btuh/watt	1100 psig, 100°F Outlet Gas
Temperature, 90°F Outdoor	
			Dry bulb Temperature	
Commercial refrigeration acceptance. Before an occupancy permit is granted for a new retail food or beverage store, or before a new refrigeration system serving a retail food or beverage store is operated for normal use, the following equipment and systems shall be certified as meeting the Acceptance Requirements for Code Compliance, as specified by the Reference Nonresidential Appendix NA7. A Certificate of Acceptance shall be submitted to the enforcement agency that certifies that the equipment and systems meet the acceptance requirements. Transcritical CO2 refrigeration systems shall be tested in accordance with NA7.20.1.
Mandatory requirements for enclosed parking garages. Enclosed Parking Garages. Mechanical ventilation systems for enclosed parking garages where the total design exhaust rate for the garage is greater than or equal to 10,000 cfm shall conform to all of the following:
Automatically detect contaminant levels and stage fans or modulate fan airflow rates to 50 percent or less of design capacity, provided acceptable contaminant levels are maintained.
Have controls and/or devices that will result in fan motor demand of no more than 30 percent of design wattage at 50 percent of design airflow.
CO shall be monitored with at least one sensor per 5,000 square feet, with the sensor located in the highest expected concentration locations, with at least two sensors per proximity zone. A proximity zone is defined as an area that is isolated from other areas either by floor or other impenetrable obstruction.
CO concentration at all sensors is maintained at £ 25 ppm or less at all times.
The ventilation rate shall be at least 0.15 cfm/ft2 when the garage is scheduled to be occupied.
The system shall maintain the garage at negative or neutral pressure relative to other occupiable spaces when the garage is scheduled to be occupied.
CO sensors shall be:
Certified by the manufacturer to be accurate within plus or minus 5 percent of measurement.
Factory calibrated.
Certified by the manufacturer to drift no more than 5 percent per year.
Certified by the manufacturer to require calibration no more frequently than once a year.
Monitored by a control system. The system shall have logic that automatically checks for sensor failure by the following means. Upon detection of a failure, the system shall reset to design ventilation rates and transmit an alarm to the facility operators.
If any sensor has not been calibrated according to the manufacturer’s recommendations within the specified calibration period, the sensor has failed.

During unoccupied periods the system compares the readings of all sensors, e.g., if any sensor is more than 15 ppm above or below the average of all sensors for longer than four hours, the sensor has failed.
During occupied periods the system compares the readings of sensors in the same proximity zone, e.g., if the 30 minute rolling average for any sensor in a proximity zone is more than 15 ppm above or below the 30 minute rolling average for other sensor(s) in that proximity zone, the sensor has failed.
Parking garage ventilation system acceptance. Before an occupancy permit is granted for a parking garage system subject to Section 120.6(c), the following equipment and systems shall be certified as meeting the acceptance requirements for code compliance, as specified by the Reference Nonresidential Appendix NA7. A certificate of acceptance shall be submitted to the enforcement agency that certifies that the equipment and systems meet the acceptance requirements specified in NA7.12.
Exception 1 to Section 120.6(c): Any garage, or portion of a garage, where more than 20 percent of the vehicles expected to be stored have nongasoline combustion engines.
Exception 2 to Section 120.6(c): Additions and alterations to existing garages where less than 10,000 cfm of new exhaust capacity is being added.
Mandatory requirements for process boilers.
Combustion air positive shut‐off shall be provided on all newly installed process boilers as follows:
All process boilers with an input capacity of 2.5 MMBtu/h (2,500,000 Btu/h) and above, in which the boiler is designed to operate with a nonpositive vent static pressure.
All process boilers where one stack serves two or more boilers with a total combined input capacity per stack of 2.5 MMBtu/h (2,500,000 Btu/h).
Process boiler combustion air fans with motors 10 horsepower or larger shall meet one of the following for newly installed boilers:
The fan motor shall be driven by a variable speed drive; or.
The fan motor shall include controls that limit the fan motor demand to no more than 30 percent of the total design wattage at 50 percent of design air volume.
Newly installed process boilers with an input capacity greater than 5 MMBtu/h (5,000,000 Btu/h) shall maintain stack‐gas oxygen concentrations at less than or equal to 3.0 percent by volume on a dry basis over firing rates of 20 to 100 percent. Combustion air volume shall be controlled with respect to measured flue gas oxygen concentration. Use of a common gas and combustion air control linkage or jack shaft is prohibited.
Exception to Section 120.6(d)3: Boilers with steady state full‐load combustion efficiency 90 percent or higher.
Mandatory requirements for compressed air systems.
All new compressed air systems, and all additions or alterations of compressed air systems where the total combined horsepower (hp) of the compressor(s) is 25 hp or more shall meet the requirements of Subsections 1 through 5. These requirements apply to the compressors, related piping systems and related controls that provide compressed air and do not apply to any equipment or controls that use or process the compressed air.
Exception 1 to Section 120.6(e): Medical gas compressed air systems serving healthcare facilities.
Trim compressor and storage. The compressed air system shall be equipped with an appropriately sized trim compressor and primary storage to provide acceptable performance across the range of the system and to avoid control gaps. The compressed air system shall comply with Subsection A or B below.
The compressed air system shall include one or more variable speed drive (VSD) compressors. For systems with more than one compressor, the total combined capacity of the VSD compressor(s) acting

as trim compressors must be at least 1.25 times the largest net capacity increment between combinations of compressors. The compressed air system shall include primary storage of at least one gallon per actual cubic feet per minute (acfm) of the largest trim compressor; or
The compressed air system shall include a compressor or set of compressors with total effective trim capacity at least the size of the largest net capacity increment between combinations of compressors, or the size of the smallest compressor, whichever is larger. The total effective trim capacity of single compressor systems shall cover at least the range from 70 to 100 percent of rated capacity. The effective trim capacity of a compressor is the size of the continuous operational range where the specific power of the compressor (kW/100 acfm) is within 15 percent of the specific power at its most efficient operating point. The total effective trim capacity of the system is the sum of the effective trim capacity of the trim compressors. The system shall include primary storage of at least 2 gallons per acfm of the largest trim compressor.
Exception 1 to Section 120.6(e)1: Alterations where the total combined added or replaced compressor horsepower is less than the average per‐compressor horsepower of all compressors in the system.
Exception 2 to Section 120.6(e)1: Alterations where all added or replaced compressors are variable speed drive (VSD) compressors and compressed air system includes primary storage of at least one gallon per actual cubic foot per minute (acfm) of the largest trim compressor.
Exception 3 to Section 120.6(e)1: Compressed air systems that have been approved by the Energy Commission Executive Director as having demonstrated that the system serves loads for which typical air demand fluctuates less than 10 percent.
Exception 4 to Section 120.6(e)1: Alterations of existing compressed air systems that include one or more centrifugal compressors.
Controls. Compressed air systems with three or more compressors and a combined horsepower rating of more than 100 hp shall operate with controls that are able to choose the most energy efficient combination and loading of compressors within the system based on the current compressed air demand.
Monitoring. Compressed air systems having a combined horsepower rating equal to or greater than 100 hp shall have an energy and air demand monitoring system with the following minimum requirements:
Measurement of system pressure.
Measurement of amps or power of each compressor.
Measurement or determination of total airflow from compressors in cfm.
Data logging of pressure, power in kW, airflow in cfm and compressed air system specific efficiency in kW/100 cfm at intervals of 5 minutes or less.
Maintained data storage of at least the most recent 24 months.
Visual trending display of each recorded point, load and specific energy.
Leak testing of compressed air piping. Compressed air system piping greater than 50 adjoining feet in length shall be pressure tested after being isolated from the compressed air supply and end uses. The piping shall be pressurized to the design pressure and test pressures shall be held for a length of time at the discretion of the authority having jurisdiction, but in no case for less than 30 minutes, with no perceptible drop in pressure.
If dial gauges are used for conducting this test, these gauges must conform with California Plumbing Code Sections 318.3, 318.4 and 318.5.
Piping less than or equal to 50 adjoining feet in length shall be pressurized and inspected. Connections shall be tested with a noncorrosive leak‐detecting fluid or other leak‐detecting methods at the discretion of the authority having jurisdiction.

Pipe sizing. Compressed air piping greater than 50 adjoining feet in length shall be designed and installed to minimize frictional losses in the distribution network. These piping installations shall meet the requirements of Section 120.6(e)5A and either Section 120.6(e)5B or 120.6(e)5C:
Service line piping shall have inner diameters greater than or equal to ¾ inch. Service line piping are pipes that deliver compressed air from distribution piping to end uses.
Piping section average velocity. Compressor room interconnection and main header piping shall be sized so that at coincident peak flow conditions, the average velocity in the segment of pipe is no greater than 20 ft/sec. Compressor room interconnection and main header piping are the pipes that deliver compressed air from the compressor outlets to the inlet to the distribution piping. Each segment of distribution and service piping shall be sized so that at coincident peak flow conditions, the average velocity in the segment of pipe is no greater than 30 ft/sec. Distribution piping are pipes that deliver compressed air from the compressor room interconnection piping or main header piping to the service line piping.
Piping total pressure drop. Piping shall be designed such that piping frictional pressure loss at coincident peak loads is less than 5 percent of operating pressure between the compressor and end use or end use regulator.
Compressed air system acceptance. Before an occupancy permit is granted for a compressed air system subject to Section 120.6(e), the equipment and systems shall be certified as meeting the acceptance requirements for code compliance, as specified by the Reference Nonresidential Appendix NA7. A certificate of acceptance shall be submitted to the enforcement agency that certifies that the equipment and systems meet the acceptance requirements specified in NA 7.13.
Mandatory requirements for elevators. Elevators shall meet the following requirements:
The light power density for the luminaires inside the elevator cab shall be no greater than 0.6 watts per square foot.
Exception to Section 120.6(f)1: Interior signal lighting and interior display lighting are not included in the calculation of lighting power density.
Elevator cab ventilation fans for cabs without space conditioning shall not exceed 0.33 watts per cfm as measured at maximum speed.
When the elevator cab is stopped and unoccupied with doors closed for over 15 minutes, the cab interior lighting and ventilation fans shall be switched off until elevator cab operation resumes.
Lighting and ventilation shall remain operational in the event that the elevator cabin gets stuck when passengers are in the cabin.
Elevator Lighting and Ventilation Control Acceptance. Before an occupancy permit is granted for elevators subject to 120.6(f), the following equipment and systems shall be certified as meeting the Acceptance Requirement for Code Compliance, as specified by the Reference Nonresidential Appendix NA7. A Certificate of Acceptance shall be submitted to the enforcement agency that certifies that the equipment and systems meet the acceptance requirements specified in NA7.14.
Exception to Section 120.6(f): Elevators located in healthcare facilities.
Mandatory requirements for escalators and moving walkways.
Escalators and moving walkways located in airports, hotels, and transportation function areas shall automatically slow to the minimum permitted speed in accordance with ASME A17.1/CSA B44 when not conveying passengers.
Escalators and Moving Walkways Acceptance. Before an occupancy permit is granted for escalators and moving walkways subject to 120.6(g), the following equipment and systems shall be certified as meeting the Acceptance Requirement for Code Compliance, as specified by the Reference Nonresidential Appendix NA7. A Certificate of Acceptance shall be submitted to the enforcement agency that certifies that the equipment and systems meet the acceptance requirements specified in NA7.15.

Mandatory requirements for Controlled Environment Horticulture (CEH) spaces.
Indoor growing, dehumidification. Dehumidification equipment shall be one of the following:
Dehumidifiers subject to regulation under federal appliance standards tested in accordance with 10 CFR 430.23(z) and Appendix X or X1 to Subpart B of 10 CFR Part 430 as applicable, and complying with 10 CFR 430.32(v)2;
Integrated HVAC system with on‐site heat recovery designed to fulfill at least 75 percent of the annual energy for dehumidification reheat;
Chilled water system with on‐site heat recovery designed to fulfill at least 75 percent of the annual energy for dehumidification reheat; or
Solid or liquid desiccant dehumidification system for system designs that require dewpoint of 50°F or less.
Indoor growing, horticultural lighting. In a building with CEH spaces and with more than 40 kW of aggregate horticultural lighting load, the electric lighting systems used for plant growth and plant maintenance shall meet all of the following requirements:
The horticultural lighting systems shall have a photosynthetic photon efficacy (PPE) rated in accordance with ANSI/ASABE S640 for wavelengths from 400 to 700 nanometers and meet one of the following requirements:
Integrated, nonserviceable luminaires shall have a rated PPE of at least 1.9 micromoles per joule; or
Luminaires with removable or serviceable lamps shall have lamps with a rated PPE of at least 1.9 micromoles per joule.
Time‐switch lighting controls shall be installed and comply with Section 110.9(b)1, Section 130.4(a)4 and applicable sections of NA7.6.2.
Multilevel lighting controls shall be installed and comply with Section 130.1(b).
Indoor growing, electrical power distribution systems. Electrical power distribution systems serving CEH spaces shall be designed so that a measurement device is capable of monitoring the electrical energy usage of aggregate horticultural lighting load.
Conditioned greenhouses, building envelope. Conditioned greenhouses shall meet the following requirements:
Opaque wall and opaque roof assembly shall meet the requirements of Section 120.7; and
Nonopaque envelopes shall have two or more glazings separated by either air or gas fill.
Conditioned greenhouses, space‐conditioning systems. Space‐conditioning systems used for plant production shall comply with all applicable requirements.
Greenhouses, horticultural lighting. In a greenhouse with more than 40 kW of aggregate horticultural lighting load, the electric lighting system used for plant growth and plant maintenance shall meet the following requirements:
The horticultural lighting systems shall have a photosynthetic photon efficacy (PPE) rated in accordance with ANSI/ASABE S640 for wavelengths from 400 to 700 nanometers and meet one of the following requirements:
Integrated, nonserviceable luminaires shall have a rated PPE of at least 1.7 micromoles per joule; or
Luminaires with removable or serviceable lamps shall have lamps with a rated PPE of at least 1.7 micromoles per joule.
Time‐switch lighting controls shall be installed and comply with Section 110.9(b)1, Section 130.4(a)4 and applicable sections of Reference Nonresidential Appendix NA7.6.2.
Multilevel lighting controls shall be installed and comply with Section 130.1(b).

Mandatory requirements for steam traps. Steam traps in new industrial facilities and new steam traps added to support new, nonreplacement, process equipment in existing industrial facilities where the installed steam trap operating pressure, which is the steam pressure entering the steam trap during normal design operating conditions, is greater than 15 psig and the total combined connected boiler input rating is greater than 5 million Btu/hr shall meet the following requirements:
Central steam trap fault detection and diagnostics monitoring. Steam trap systems shall be equipped with a central steam trap monitoring system that:
Provides a status update of all steam trap fault detection sensors at no greater than 8‐hour intervals.
Automatically displays an alarm that identifies which steam trap has a fault once the system has detected a fault.
Steam trap fault detection. Steam traps shall be equipped with automatic fault detection sensors that shall communicate their operational state to the central steam trap monitoring system as described in Section 120.6(i)1.
Steam trap strainer installation. Steam traps shall either:
Be equipped with an integral strainer and blow‐off valve; or
Be installed downstream within 3 feet of a strainer and blow‐off valve.
Steam trap system acceptance. Before an occupancy permit is granted for steam trap systems subject to Section 120.6(i), the equipment and systems shall be certified as meeting the Acceptance Requirement for Code Compliance, as specified by the Reference Nonresidential Appendix NA7.19. A Certificate of Acceptance shall be submitted to the enforcement agency that certifies that the equipment and systems meet the acceptance requirements specified in NA7.19.
Exception 1 to Section 120.6(i): Steam traps where steam is diverted to a steam system of lower pressure for use when the steam trap fails open.
Mandatory requirements for computer rooms. Space‐conditioning systems serving a computer room shall meet the following requirements:
Reheat. Each computer room zone shall have controls that prevent reheating, recooling and simultaneous provisions of heating and cooling to the same zone, such as mixing or simultaneous supply of air that has been previously mechanically heated and air that has been previously cooled, either by cooling equipment or by economizer systems.
Humidification. Humidification shall be adiabatic. Nonadiabatic humidification, including but not limited to steam and infrared, is prohibited.
Fan control. Each unitary air conditioner with mechanical cooling capacity exceeding 60,000 Btu/hr and each chilled water fan system shall be designed to vary the airflow rate as a function of actual load. Fan motor demand shall not exceed 50 percent of design wattage at 66 percent of design fan speed.
Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.8, and 25943, Public Resources Code.

SECTION 120.7 – MANDATORY INSULATION REQUIREMENTS
Nonresidential and hotel/motel buildings shall comply with the applicable requirements in Sections 120.7(a) through 120.7(c).
Roof/Ceiling insulation. The opaque portions of the roof/ceiling that separates conditioned spaces from unconditioned spaces or ambient air shall meet the applicable requirements of Items 1 through 3 below:
Metal building. The weighted average U‐factor of the roof assembly shall not exceed 0.098.
Wood framed and others. The weighted average U‐factor of the roof assembly shall not exceed 0.075.
Insulation placement. Insulation installed to limit heat loss and gain from conditioned spaces to unconditioned spaces shall comply with all of the following:
Insulation shall be installed in direct contact with a roof or ceiling that is sealed to limit infiltration and exfiltration as specified in Section 110.7. This may include, but is not limited to, placing insulation either above or below the roof deck or on top of the finished ceiling.
When insulation is installed at the roof in nonresidential buildings, fixed vents or openings to the outdoors or to unconditioned spaces shall not be installed. When the space between the ceiling and the roof is either directly or indirectly conditioned space, it shall not be considered an attic for the purposes of complying with CBC attic ventilation requirements.
Insulation placed on top of a suspended ceiling with removable ceiling panels shall not be used to meet the Roof/Ceiling requirement of Sections 140.3 and 141.0.
Exception to Section 120.7(a)3: When there are conditioned spaces with a combined floor area no greater than 2,000 square feet in an otherwise unconditioned building, and when the average height of the space between the ceiling and the roof over these spaces is greater than 12 feet, insulation placed in direct contact with a suspended ceiling with removable ceiling panels shall be an acceptable method of reducing heat loss from a conditioned space and shall be accounted for in heat loss calculations.
NOTE: Vents that do not penetrate the roof deck and are instead designed for wind resistance for roof membranes are not within the scope of Section 120.7(a)3B.
Wall insulation. The opaque portions of walls that separate conditioned spaces from unconditioned spaces or ambient air shall meet the applicable requirements of Items 1 through 7 below:
Metal building. The weighted average U‐factor of the wall assembly shall not exceed 0.113.
Metal framed. The weighted average U‐factor of the wall assembly shall not exceed 0.151.
Light mass walls. A 6‐inch or greater hollow core concrete masonry unit shall have a U‐factor not to exceed 0.440.
Heavy mass walls. An 8‐inch or greater hollow core concrete masonry unit shall have a U‐factor not to exceed 0.690.
Wood framed and others. The weighted average U‐factor of the wall assembly shall not exceed 0.110.
Spandrel panels and curtain wall. The weighted average U‐factor of the spandrel panels and curtain wall assembly shall not exceed 0.280.
Demising walls. The opaque portions of framed demising walls shall meet the requirements of Item A or B below:
Wood framed walls shall be insulated to meet a U‐factor not greater than 0.099.
Metal framed walls shall be insulated to meet a U‐factor not greater than 0.151.
Floor and soffit insulation. The opaque portions of floors and soffits that separate conditioned spaces from unconditioned spaces or ambient air shall meet the applicable requirements of Items 1 and 2 below:

Raised mass floors. Shall have a minimum of 3 inches of lightweight concrete over a metal deck, or the weighted average U‐factor of the floor assembly shall not exceed 0.269.
Other floors. The weighted average U‐factor of the floor assembly shall not exceed 0.071.
Heated slab on grade floor. A heated slab on grade floor shall be insulated to meet the requirements of Section 110.8(g).
Exception to Section 120.7: A dedicated building used solely as a data center that has a total covered process load exceeding 750 kW.
Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.8, and 25943, Public Resources Code.

SECTION 120.8 – NONRESIDENTIAL BUILDING COMMISSIONING
Nonresidential buildings other than healthcare facilities, with conditioned space of 10,000 square feet or more, shall comply with the applicable requirements of Sections 120.8(a) through 120.8(i) in the building design and construction processes. All building systems and components covered by Sections 110.0, 120.0, 130.0, and 140.0 shall be included in the scope of the commissioning requirements in this Section, excluding those related solely to covered processes.
Nonresidential buildings other than healthcare facilities, with conditioned space of less than 10,000 square feet shall comply with the design review requirements specified in Sections 120.8(d), and shall include any measures or requirements necessary for completing this review in the construction documents in a manner consistent with Section 120.8(e).
Healthcare facilities shall instead comply with the applicable requirements of Chapter 7 of the California Administrative Code (Title 24, Part 1).
NOTE: Nonresidential buildings include nonresidential spaces such as nonresidential function areas within hotel/motel and high‐rise residential buildings. The requirements of Section 120.8 apply based on the square footage of the nonresidential spaces.
The commissioning described in this Section is in addition to any commissioning required by Title 24, Part 11, Section 5.410.2, 5.410.4 and subsections.
Summary of commissioning requirements. Commissioning shall include completion of the following items:
Owner’s or owner representative’s project requirements;
Basis of design;
Design phase design review;
Commissioning measures shown in the construction documents;
Commissioning plan;
Functional performance testing;
Documentation and training; and
Commissioning report.
Owner’s or Owner Representative’s Project Requirements (OPR). The energy‐related expectations and requirements of the building shall be documented before the design phase of the project begins. This documentation shall include the following:
Energy efficiency goals;
Ventilation requirements;
Project documentation requirements, including facility functions, hours of operation, and need for after‐ hours operation;
Equipment and systems expectations; and
Building envelope performance expectations.
Basis of design (BOD). A written explanation of how the design of the building systems and components meets the OPR shall be completed at the design phase of the building project, and updated as necessary during the design and construction phases. The basis of design document shall cover the following systems and components:
Heating, ventilation, air conditioning (HVAC) systems and controls;
Indoor lighting system and controls;
Water heating systems and controls;

Any other building equipment or system listed in the OPR; and
Any building envelope component considered in the OPR.
Design phase design review.
Design reviewer requirements. The design reviewer shall be the signer of the Design Review Kickoff Certificate(s) of Compliance and Construction Document Design Review Checklist Certificate(s) of Compliance as specified in Part 1 Section 10‐103(a)1.
Design review kickoff. During the schematic design phase of the building project, the owner or owner’s representative, design team and design reviewer must meet to discuss the project scope, schedule and how the design reviewer will coordinate with the project team. The building owner or owner’s representative shall include the Design Review Kickoff Certificate of Compliance form in the certificate of compliance documentation (as specified in Part 1 Section 10‐103).
Construction documents design review. The construction documents design review Checklist Certificate of Compliance shall list the items checked by the design reviewer during the construction document review. The completed form shall be returned to the owner and design team for review and sign‐off. The building owner or owner’s representative shall include this form in the certificate of compliance documentation (as specified in Part 1 Section 10‐103).
Commissioning measures shown in the construction documents. Complete descriptions of all measures or requirements necessary for commissioning shall be included in the construction documents (plans and specifications). Commissioning measures or requirements shall be clear, detailed and complete to clarify the commissioning process.
Commissioning plan. Prior to permit issuance a commissioning plan shall be completed to document how the project will be commissioned and shall be started during the design phase of the building project. The commissioning plan shall include the following:
General project information;
Commissioning goals;
Systems to be commissioned; and
Plans to test systems and components, which shall include:
An explanation of the original design intent;
Equipment and systems to be tested, including the extent of tests;
Functions to be tested;
Conditions under which the test shall be performed;
Measurable criteria for acceptable performance;
Commissioning team information; and
Commissioning process activities, schedules and responsibilities. Plans for the completion of commissioning requirements listed in Sections 120.8(g) through 120.8(i) shall be included.
Functional performance testing. Functional performance tests shall demonstrate the correct installation and operation of each component, system and system‐to‐system interface in accordance with the acceptance test requirements in Sections 120.5, 130.4, 140.9, 160.3(d) and 160.5(e). Functional performance testing reports shall contain information addressing each of the building components tested, the testing methods utilized, and include any readings and adjustments made.
Exception to Section 120.8(g): Healthcare facilities.
Documentation and training. A systems manual and systems operations training shall be completed.

Systems manual. Documentation of the operational aspects of the building shall be completed within the systems manual and delivered to the building owner or representative and facilities operator. The systems manual shall include the following:
Site information, including facility description, history and current requirements;
Site contact information;
Instructions for basic operations and maintenance, including general site operating procedures, basic troubleshooting, recommended maintenance requirements, and a site events log;
Description of major systems;
Site equipment inventory and maintenance notes; and
A copy of all special inspection verifications required by the enforcing agency or the standards.
Systems operations training. The training of the appropriate maintenance staff for each equipment type or system shall be documented in the commissioning report. Training materials shall include the following:
System and equipment overview (i.e., what the equipment is, what it does and with what other systems or equipment it interfaces);
Review and demonstration of operation, servicing and preventive maintenance procedures;
Review of the information in the systems manual; and
Review of the record drawings on the systems and equipment.
Commissioning report. A complete report of commissioning process activities undertaken through the design, construction and reporting recommendations for post‐ construction phases of the building project shall be completed and provided to the owner or owner’s representative.
Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and 25943, Public Resources Code.

SECTION 120.9 – MANDATORY REQUIREMENTS FOR COMMERCIAL BOILERS
Combustion air positive shut‐off shall be provided on all newly installed boilers as follows:
All boilers with an input capacity of 2.5 MMBtu/h (2,500,000 Btu/h) and above, in which the boiler is designed to operate with a nonpositive vent static pressure.
All boilers where one stack serves two or more boilers with a total combined input capacity per stack of
2.5 MMBtu/h (2,500,000 Btu/h).
Boiler combustion air fans with motors 10 horsepower or larger shall meet one of the following for newly installed boilers:
The fan motor shall be driven by a variable speed drive, or
The fan motor shall include controls that limit the fan motor demand to no more than 30 percent of the total design wattage at 50 percent of design air volume.
Newly installed boilers with an input capacity 5 MMBtu/h (5,000,000 Btu/h) and greater shall maintain stack‐gas oxygen concentrations at less than or equal to 5.0 percent by volume on a dry basis over firing rates of 20 to 100 percent. Combustion air volume shall be controlled with respect to firing rate or flue gas oxygen concentration. Use of a common gas and combustion air control linkage or jack shaft is prohibited.
Exception to Section 120.9(c): Boilers with steady state full‐load combustion efficiency 90 percent or higher. Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.8, and 25943, Public Resources Code.

SECTION 120.10 – MANDATORY REQUIREMENTS FOR FANS
Each fan or fan array with a combined motor nameplate horsepower greater than 1.00 hp or with a combined fan nameplate electrical input power greater than 0.89 kW shall have a fan energy index (FEI) of 1.00 or higher at fan system design conditions. Each fan and fan array used for a variable‐air‐volume system that meets the requirements of Section 140.4(c)2 shall have an FEI of 0.95 or higher at fan system design conditions.
The FEI for fan arrays shall be calculated in accordance with ANSI/AMCA 208‐18 Annex C.
All FEI values shall be provided by a manufacturer, where fan selection software and/or fan catalogs display third party verified FEI values in accordance with ANSI/AMCA 208‐18.
Exception to Section 120.10(a)2: FEI values for embedded fans do not need to be third‐party verified.
Exception 1 to Section 120.10(a): Embedded fans that are part of the equipment listed under Section 110.1 or Section 110.2, computer room air conditioners (CRACs) as defined in 10 CFR 431, and DX‐DOAS units.
Exception 2 to Section 120.10(a): Embedded fans and embedded fan arrays with a combined motor nameplate horsepower of 5 hp or less or with a fan system electrical input power of 4.1 kW or less.
Exception 3 to Section 120.10(a): Circulation fans, ceiling fans and air curtains.
Exception 4 to Section 120.10(a): Fans that are intended to operate only during emergency conditions.
NOTE: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.8 and 25943, Public Resources Code.

SUBCHAPTER 4 NONRESIDENTIAL AND HOTEL/MOTEL
OCCUPANCIES—MANDATORY REQUIREMENTS FOR LIGHTING SYSTEMS AND EQUIPMENT, AND ELECTRICAL POWER DISTRIBUTION SYSTEMS

SECTION 130.0 – LIGHTING SYSTEMS AND EQUIPMENT, AND ELECTRICAL POWER DISTRIBUTION SYSTEMS —GENERAL
The design and installation of all lighting systems and equipment in nonresidential and hotel/motel buildings, outdoor lighting, and electrical power distribution systems within the scope of Section 100.0(a), shall comply with the applicable provisions of Sections 130.0 through 130.5.
NOTE: The requirements of Sections 130.0 through 130.5 apply to newly constructed buildings. Section 141.0 specifies which requirements of Sections 130.0 through 130.5 also apply to additions and alterations to existing buildings.
Functional areas where compliance with the residential lighting standards is required. The design and installation of all lighting systems, lighting controls and equipment in the following functional areas shall comply with the applicable residential lighting requirements of Section 150.0(k). In buildings containing these functional areas, all other functional areas, such as common areas, shall comply with the applicable nonresidential lighting and controlled receptacle requirements.
Reserved.
Outdoor lighting attached to a hotel/motel building and separately controlled from the inside of a guest room.
Fire station dwelling accommodations.
Hotel and motel guest rooms. Additionally, hotel and motel guest rooms shall meet the requirements of Section 130.1(c)8 and Section 130.5(d)4.
Reserved.
NOTE: The requirements of Section 130.0(b) also apply to additions and alterations to functional areas of existing buildings as specified in Section 130.0(b).
Luminaire classification and power. Luminaires shall be classified, and their wattage shall be determined as follows:
Luminaire wattage shall be labeled as follows:
The maximum rated wattage or relamping rated wattage of a luminaire shall be listed on a permanent, preprinted, factory installed label, as specified by UL 1574, 1598, 2108 or 8750, as applicable; and
The factory-installed maximum rated wattage or relamping rated wattage label shall not consist of peel-off or peel-down layers or other methods that allow the rated wattage to be changed after the luminaire has been shipped from the manufacturer.
Exception to Section 130.0(c)1B: Peel-down labels may be used only for the following luminaires, when they can accommodate a range of lamp wattages without changing the luminaire housing, ballast, transformer or wiring. Qualifying luminaires shall have a single lamp, and shall have integrated

SECTION 130.0 – LIGHTING SYSTEMS AND EQUIPMENT, AND ELECTRICAL POWER DISTRIBUTION SYSTEMS — GENERAL

ballasts or transformers. Peel-down labels must be layered such that the rated wattage reduces as successive layers are removed.
High-intensity discharge luminaires, having an integral electronic ballast, with a maximum relamping rated wattage of 150 watts.
Low-voltage luminaires (except low voltage track systems), £ 24 volts, with a maximum relamping rated wattage of 50 watts.
Compact fluorescent luminaires, having an integral electronic ballast, with a maximum relamping rated wattage of 42 watts.
For luminaires with line voltage lamp holders not served by drivers, ballasts, or transformers; the wattage of such luminaires shall be determined as the maximum relamping rated wattage as labeled in accordance with Section 130.0(c)1.
For luminaires with permanently installed or remotely installed ballasts, the wattage of such luminaires shall be the operating input wattage of the rated lamp/ballast combination published in the ballast manufacturer’s catalogs based on independent testing lab reports as specified by UL 1598.
For inseparable SSL luminaires and SSL luminaires with remotely mounted drivers, the maximum rated wattage shall be the maximum rated input wattage of the SSL luminaire as specified in Section 130.0(c)1 when tested in accordance with UL 1598, 2108 or 8750, or IES LM-79.
For LED tape lighting and LED linear lighting with LED tape lighting components, the maximum rated wattage shall be the sum of the installed length of the tape lighting times its rated linear power density in watts per linear feet, or the maximum rated input wattage of the driver or power supply providing power to the lighting system, with tape lighting tested in accordance with UL 2108 or 8750, or IES LM-79.
For modular lighting systems that allow the addition or relocation of luminaires without altering the wiring of the system, shall be determined as follows:
The wattage shall be the greater of:
30 watts per linear foot of track or plug-in busway; or
the rated wattage of all of the luminaires included in the system, where the luminaire wattage is determined as specified in Section 130.0(c)1.
For line-voltage lighting track and plug-in busway served by a track lighting integral current limiter or a dedicated track lighting supplementary overcurrent protection panel, the wattage shall be determined as follows:
The volt-ampere rating of the current limiter as specified by UL 1077; or
The sum of the ampere (A) rating of all of the current protection devices times the branch circuit voltages for track lighting supplementary overcurrent protection panel.
For other modular lighting systems with power supplied by a driver, power supply or transformer, including but not limited to low-voltage lighting systems, the wattage of the system shall be the maximum rated input wattage of the driver, power supply or transformer published in the manufacturer’s catalogs, as specified by UL 2108 or 8750.
Exception to Section 130.0(c)6: For power-over-Ethernet lighting systems, power provided to installed nonlighting devices may be subtracted from the total power rating of the power-over-Ethernet system.
For all other lighting equipment not addressed by Sections 130.0(c)2 through 6, the wattage of the lighting equipment shall be the maximum rated wattage of the lighting equipment, or operating input wattage of the system, labeled in accordance with Section 130.0(c)1, or published in manufacturer’s catalogs, based on independent testing lab reports as specified by UL 1574, 1598, 2108 or 8750, or IES LM-79.

SECTION 130.0 – LIGHTING SYSTEMS AND EQUIPMENT, AND ELECTRICAL POWER DISTRIBUTION SYSTEMS — GENERAL

Lighting controls. All lighting controls and equipment shall comply with the applicable requirements in Sections 110.9, 130.1 and 130.2, and shall be installed in accordance with any applicable manufacturer instructions.
Energy Management Control System (EMCS). An EMCS may be installed to comply with the requirements of one or more lighting controls if it meets the following minimum requirements:
Provides all applicable functionality for each specific lighting control or system for which it is installed in accordance with Sections 110.9, 130.1 and 130.2; and
Complies with all applicable lighting control installation requirements in accordance with Section 130.4 for each specific lighting control or system for which it is installed; and
Complies with all applicable application requirements for each specific lighting control or system for which it is installed, in accordance with Part 6.
Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and 25943, Public Resources Code.

SECTION 130.0 – LIGHTING SYSTEMS AND EQUIPMENT, AND ELECTRICAL POWER DISTRIBUTION SYSTEMS — GENERAL

SECTION 130.1 – MANDATORY INDOOR LIGHTING CONTROLS
Nonresidential and hotel/motel buildings shall comply with the applicable requirements of Sections 130.1(a) through 130.1(f), in addition to the applicable requirements of Sections 110.9 and 130.0.
Manual area controls. Each area enclosed by ceiling-height partitions shall provide lighting controls that allow the lighting in that area to be manually turned on and off. The manual control shall:
Be readily accessible; and
Exception to Section 130.1(a)1: Restrooms having two or more stalls, parking areas, stairwells, corridors and areas of the building intended for access or use by the public may use a manual control not accessible to unauthorized personnel.
Be located in the same enclosed area with the lighting it controls; and
Exception 1 to Section 130.1(a)2: For malls and atria, main entry lobbies, auditorium areas, dining areas, retail merchandise sales areas, wholesale showroom areas, commercial and industrial storage areas, general commercial and industrial work areas, convention centers, arenas, psychiatric and secure areas in healthcare facilities, and other areas where placement of a manual area control poses a health and safety hazard, the manual area control may instead be located so that a person using the control can see the lights or area controlled by that control, or visually signal or display showing the current state of the controlled lighting.
Exception 2 to Section 130.1(a)2: In healthcare facilities, for restrooms and bathing rooms intended for a single occupant, the lighting control may be located outside the enclosed area but directly adjacent to the door.
Provide separate control of general, floor display, wall display, window display, case display, ornamental, and special effects lighting, such that each type of lighting can be turned on or off without turning on or off other types of lighting. Scene controllers may comply with this requirement provided that at least one scene turns on general lighting only, and the control provides a means to manually turn off all lighting.
Exception to Section 130.1(a): Up to 0.1 watts per square foot of indoor lighting may be continuously illuminated to allow for means of egress illumination consistent with California Building Code Section 1008. Egress lighting complying with this wattage limitation is not required to comply with manual area control requirements if:
The area is designated for means of egress on the plans and specifications submitted to the enforcement agency under Section 10-103(a)2 of Part 1; and
The controls for the egress lighting are not accessible to unauthorized personnel.
Multilevel lighting controls. The general lighting of any enclosed area 100 square feet or larger with a connected lighting load that exceeds 0.5 watts per square foot shall provide multilevel lighting controls that allow the level of lighting to be adjusted up and down. The multi-level controls shall:
Provide the number of control steps specified in Table 130.1-A; and
Exception to Section 130.1(b)1: Classrooms with a connected general lighting load of 0.6 watts per square foot or less shall have a minimum of one control step between 30 and 70 percent of full rated power, regardless of luminaire type.
Meet the uniformity requirements specified in Table 130.1-A.
Exception 1 to Section 130.1(b): An area enclosed by ceiling-height partitions that has only one luminaire with no more than two lamps or has only one inseparable SSL luminaire.
Exception 2 to Section 130.1(b): Restrooms.

SECTION 130.1 – MANDATORY INDOOR LIGHTING CONTROLS

Exception 3 to Section 130.1(b): Healthcare facilities.
Shut-OFF Controls. All installed indoor lighting shall be equipped with controls able to automatically reduce lighting power when the space is typically unoccupied.
Exception 1 to Section 130.1(c): Healthcare facilities.
In addition to lighting controls installed to comply with Sections 130.1(a) and (b), all installed indoor lighting shall be equipped with controls that meet the following requirements:
Shall be controlled with an occupant sensing control, automatic time-switch control, or other control capable of automatically shutting OFF all of the lighting when the space is typically unoccupied; and
Separate controls for the lighting on each floor, other than lighting in stairwells; and
Separate controls for a space enclosed by ceiling height partitions not exceeding 5,000 square feet.
Exception to Section 130.1(c)1C: The area controlled may not exceed 20,000 square feet in the following function areas: malls, auditoriums, single tenant retail, industrial, convention centers and arenas.
Exception 1 to Section 130.1(c)1: Where the lighting is serving an area that is in continuous use, 24 hours per day/365 days per year.
Exception 2 to Section 130.1(c)1: Lighting complying with Section 130.1(c)5 or 7.
Exception 3 to Section 130.1(c)1: Up to 0.1watts per square foot of lighting in any area within a building may be continuously illuminated, provided that the area is designated for means of egress on the plans and specifications submitted to the enforcement agency under Section 10-103(a)2 of Part 1. Lighting providing means of egress illumination, as the term is used in the California Building Code, shall be configured to provide no less than the amount of light required by California Building Code Section 1008 while in the partial-off mode.
Exception 4 to Section 130.1(c)1: Electrical equipment rooms subject to Article 110.26(D) of the California Electrical Code.
Exception 5 to Section 130.1(c)1: Illumination provided by lighting equipment that is designated for emergency lighting, connected to an emergency power source or battery supply, and is intended to function in emergency mode only when normal power is absent.
Countdown timer switches may be used to comply with the automatic shut-OFF control requirements in Section 130.1(c)1 only in closets less than 70 square feet, and server aisles in server rooms. The maximum timer setting shall be 10 minutes for closets, and 30 minutes for server aisles.
If an automatic time-switch control, other than an occupant sensing control, is installed to comply with Section 130.1(c)1, it shall incorporate a manual override lighting control that:
Complies with Section 130.1(a); and
Allows the lighting to remain ON for no more than 2 hours when an override is initiated.
Exception to Section 130.1(c)3B: In the following function areas, the override time may exceed 2 hours: Malls, auditoriums, single tenant retail, industrial, laboratories and arenas where captive-key override is utilized.
If an automatic time-switch control, other than an occupant sensing control, is installed to comply with Section 130.1(c)1, it shall incorporate an automatic holiday “shut-OFF” feature that turns OFF all loads for at least 24 hours, and then resumes the normally scheduled operation.
Exception to Section 130.1(c)4: In retail stores and associated malls, restaurants, grocery stores, churches, and theaters, the automatic time-switch control is not required to incorporate an automatic holiday shut- OFF feature.

SECTION 130.1 – MANDATORY INDOOR LIGHTING CONTROLS

Occupant sensing controls are required for specified offices, multipurpose rooms, classrooms, conference rooms and restrooms. In offices 250 square feet or smaller, multipurpose rooms of less than 1,000 square feet, classrooms of any size, conference rooms of any size, and restrooms of any size, lighting shall be controlled with occupant sensing controls to automatically shut OFF all of the lighting in 20 minutes or less after the control zone is unoccupied.
In areas required by Section 130.1(b) to have multi-level lighting controls, the occupant sensing controls shall function either as a:
Partial-ON occupant sensing controls capable of automatically activating between 50 and 70 percent of controlled lighting power, or
Vacancy sensing controls, where all lighting responds to a manual ON input only.
In areas not required by Section 130.1(b) to have multilevel lighting controls, the occupant sensing controls shall function either as:
Occupant sensing controls; or
Partial-ON occupant sensing controls, or
Vacancy sensing controls, where all lighting responds to a manual ON input only.
In addition, controls shall be provided that allow the lights to be manually shut OFF in accordance with Section 130.1(a) regardless of the sensor status.
Full or partial-OFF occupant sensing controls are required for aisle ways and open area in warehouses, library book stack aisles, corridors and stairwells, and offices greater than 250 square feet. Lighting installed in the following areas shall meet the requirements below in addition to complying with Section 130.1(c)1.
In aisle ways and open areas in warehouses, lighting shall be controlled with occupant sensing controls that automatically reduce lighting power by at least 50 percent when the areas are unoccupied. The occupant sensing controls shall independently control lighting in each aisle way, and shall not control lighting beyond the aisle way being controlled by the sensor.
Exception 1 to Section 130.1(c)6A: In aisle ways and open areas in warehouses in which the installed lighting power is 80 percent or less of the value allowed under the area category method, occupant sensing controls shall reduce lighting power by at least 40 percent.
Exception 2 to Section 130.1(c)6A: When metal halide lighting or high pressure sodium lighting is installed in warehouses, occupant sensing controls shall reduce lighting power by at least 40 percent.
In library book stack aisles 10 feet or longer that are accessible from only one end, and library book stack aisles 20 feet or longer that are accessible from both ends, lighting shall be controlled with occupant sensing controls that automatically reduce lighting power by at least 50 percent when the areas are unoccupied. The occupant sensing controls shall independently control lighting in each aisle way, and shall not control lighting beyond the aisle way being controlled by the sensor.
In corridors and stairwells, lighting shall be controlled by occupant sensing controls that separately reduce the lighting power in each space by at least 50 percent when the space is unoccupied. The occupant sensing controls shall be capable of automatically turning the lighting fully ON only in the separately controlled space, and shall be automatically activated from all designed paths of egress.
In office spaces greater than 250 square feet, general lighting shall be controlled with occupant sensing controls that meet all of the following:
The occupant sensing controls shall be configured so that lighting shall be controlled separately in control zones not greater than 600 square feet. For luminaires with an embedded occupant sensor that are capable of reducing power independently from other luminaires, each luminaire can be considered its own control zone; and

SECTION 130.1 – MANDATORY INDOOR LIGHTING CONTROLS

In 20 minutes or less after the control zone is unoccupied, the occupant sensing controls shall uniformly reduce lighting power in the control zone by at least 80 percent of full power. Control functions that switch control zone lights completely off when the zone is vacant meet this requirement; and
In 20 minutes or less after the entire office space is unoccupied, the occupant sensing controls shall automatically turn off lighting in all control zones in the space; and
In each control zone, lighting shall be allowed to automatically turn on to any level up to full power upon occupancy within the control zone. When occupancy is detected in any control zone in the space, the lighting in other control zones that are unoccupied shall operate at no more than 20 percent of full power.
Exception to Section 130.1(c)6D: Under-shelf or furniture-mounted task lighting controlled by a local switch and either a time switch or an occupancy sensor.
Partial-OFF occupant sensing controls. Partial-OFF occupant sensing controls are required for specified stairwells and common area corridors, parking garages, parking areas and loading and unloading areas. Lighting installed in the following areas shall meet the requirements below instead of complying with Section 130.1(c)1.
Lighting in stairwells and common area corridors that provide access to guestrooms of hotel/motels shall be controlled with occupant sensing controls that automatically reduce lighting power by at least 50 percent when the areas are unoccupied. The occupant sensing controls shall be capable of automatically turning the lighting fully ON only in the separately controlled space, and shall be automatically activated from all designed paths of egress.
Exception to Section 130.1(c)7A: In corridors and stairwells in which the installed lighting power is 80 percent or less of the value allowed under the area category method, occupant sensing controls shall reduce power by at least 40 percent.
In parking garages, parking areas and loading and unloading areas, general lighting shall be controlled by occupant sensing controls having at least one control step between 20 percent and 50 percent of design lighting power. No more than 500 watts of rated lighting power shall be controlled together as a single zone. A reasonably uniform level of illuminance shall be achieved in accordance with the applicable requirements in Table 130.1-A. The occupant sensing controls shall be capable of automatically turning the lighting fully ON only in the separately controlled space, and shall be automatically activated from all designed paths of egress.
Interior areas of parking garages are classified as indoor lighting for compliance with Section 130.1(c)7B. Parking areas on the roof of a parking structure are classified as outdoor hardscape and shall comply with the applicable provisions in Section 130.2.
Exception to Section 130.1(c)7B: Metal halide luminaires with a lamp plus ballast mean system efficacy of greater than 75 lumens per watt, used for general lighting in parking garages, parking areas and loading and unloading areas, shall be controlled by occupant sensing controls having at least one control step between 20 percent and 60 percent of design lighting power.
Hotel/motel guest rooms shall be controlled with one of the following such that, no longer than 20 minutes after the guest room has been vacated, lighting power is switched off:
Captive card key controls; or
Occupant sensing controls; or
Other automatic controls.
Exception to Section 130.1(c)8: One high-efficacy luminaire as defined in Table 150.0-A that is switched separately and where the switch is located within 6 feet of the entry door.
Automatic daylighting controls. The general lighting in skylit daylit zones, primary sidelit daylit zones and secondary sidelit daylit zones, as well as the general lighting in the combined primary and secondary sidelit

SECTION 130.1 – MANDATORY INDOOR LIGHTING CONTROLS

daylit zones in parking garages, shall be provided with controls that automatically adjust the power of the installed lighting up and down to keep the total light level stable as the amount of incoming daylight changes. For skylight located in an atrium, the skylit daylit zone definition shall apply to the floor area directly under the atrium and the top floor area directly adjacent to the atrium.
All skylit daylit zones, primary sidelit daylit zones, secondary sidelit daylit zones, and the combined primary and secondary sidelit daylit zones in parking garages shall be shown on the plans.
NOTE: Parking areas on the roof of a parking structure are outdoor hardscape, not skylit daylit areas.
The automatic daylighting controls shall provide separate control for general lighting in each type of daylit zone. General lighting in overlapping skylit daylit zone and sidelit daylit zone shall be controlled as part of the skylit daylit zone. General lighting in overlapping primary and secondary sidelit daylit zones shall be controlled as part of the primary sidelit daylit zone. Linear LED and other solid state lighting (SSL) light sources in linear form may be treated as linear lamps in increments of 4-foot segments or smaller, and each segment is separately controlled based on the type of the daylit zone in which the segment is primarily located.
The automatic daylighting controls shall:
For spaces required to install multilevel controls under Section 130.1(b), adjust lighting via continuous dimming or the number of control steps provided by the multilevel controls;
For each space, ensure the combined illuminance from the controlled lighting and daylight is not less than the illuminance from controlled lighting when no daylight is available;
For areas other than parking garages, ensure that, when the daylight illuminance is greater than 150 percent of the illuminance provided by the controlled lighting when no daylight is available, the controlled lighting power in that daylight zone shall be reduced by a minimum of 90 percent; and
For parking garages, ensure that when daylight illuminance levels measured at the farthest edge of the secondary sidelit zone away from the glazing or opening are greater than 150 percent of the illuminance provided by the controlled lighting when no daylight is available, the controlled lighting power in the combined primary and secondary sidelit daylit zones shall be reduced by 100 percent.
Photosensors shall be located so that they are not readily accessible to unauthorized personnel.
The location where calibration adjustments are made to the automatic daylighting controls shall be readily accessible to authorized personnel but may be inside a locked case or under a cover which requires a tool for access.
Exception 1 to Section 130.1(d): Areas under skylights where it is documented that existing adjacent structures or natural objects block direct sunlight for more than 1,500 daytime hours per year between 8 a.m. and 4 p.m.
Exception 2 to Section 130.1(d): Areas adjacent to vertical glazing below an overhang, where the overhang covers the entire width of the vertical glazing, no vertical glazing is above the overhang, and the ratio of the overhang projection to the overhang rise is greater than 1.5 for South, East and West orientations or greater than 1 for North orientations.
Exception 3 to Section 130.1(d): Rooms where the combined total installed wattage of the general lighting in the skylit and primary sidelit zones is less than 120 watts are not required to have daylighting controls for those zones. Rooms where the total installed wattage of the general lighting in the secondary sidelit zones is less than 120 watts are not required to have daylighting controls for that zone.
Exception 4 to Section 130.1(d): Parking garage areas where the total installed wattage of the general lighting in the primary and the secondary sidelit daylit zones is less than 60 watts do not require automatic daylighting controls in the daylit zones.
Exception 5 to Section 130.1(d): Rooms that have a total glazing area of less than 24 square feet, or parking garage areas with a combined total of less than 36 square feet of glazing or opening.
Exception 6 to Section 130.1(d): For parking garages, luminaires located in the daylight adaptation zone.

SECTION 130.1 – MANDATORY INDOOR LIGHTING CONTROLS

Exception 7 to Section 130.1(d): Luminaires in sidelit daylit zones in retail merchandise sales and wholesale showroom areas.
Demand responsive controls. See Section 110.12 for requirements for demand responsive lighting controls.
Control interactions. Each lighting control installed to comply with Section 130.1 (a) through (e) shall permit or incorporate the functions of the other lighting controls.
For general lighting, the manual area control shall permit the level or amount of light provided while the lighting is on to be set or adjusted by the controls specified in Section 130.1(b), (c), (d), and (e).
The manual area control shall permit the shutoff control to turn the lighting down or off.
The multilevel lighting control shall permit the automatic daylighting control to adjust the electric lighting level in response to changes in the amount of daylight in the daylit zone.
The multilevel lighting control shall permit the demand responsive control to adjust the lighting during a demand response event and to return it to the level set by the multilevel control after the event.
The shutoff control shall permit the manual area control to turn the lighting on. If the on request occurs while an automatic time switch control would turn the lighting off, then the on request shall be treated as an override request consistent with Section 130.1(c)3.
The automatic daylighting control shall permit the multilevel lighting control to adjust the level of lighting.
For lighting controlled by multilevel lighting controls and by occupant sensing controls that provide an automatic-on function, the controls shall provide a partial-on function that is capable of automatically activating between 50–70 percent of controlled lighting power.
Reserved.
For space-conditioning system zones serving only spaces that are required to have occupant sensing controls as specified in Section 130.1(c)5, 6 and 7, and where Table 120.1-A allows the ventilation air to be reduced to zero when the space is in occupied-standby mode, the space-conditioning system shall be controlled by occupancy sensing controls as specified in Section 120.2(e)3.
Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and 25943, Public Resources Code.

SECTION 130.1 – MANDATORY INDOOR LIGHTING CONTROLS

TABLE 130.1-A MULTILEVEL LIGHTING CONTROLS AND UNIFORMITY REQUIREMENTS
Luminaire Type	Minimum Required Control Steps ( percent of full rated power1 )	Uniform level of illuminance shall be achieved by:	
LED luminaires and LED light source systems	Continuous dimming 10-100 percent	Continuous dimming 10-100 percent	
Line-voltage sockets except GU-24	Continuous dimming 10-100 percent	Continuous dimming 10-100 percent	
Low-voltage incandescent systems	Continuous dimming 10-100 percent	Continuous dimming 10-100 percent	
Fluorescent luminaires	Continuous dimming 20-100 percent	Continuous dimming 20-100 percent	
GU-24 sockets rated for fluorescent ≤ 20
watts;
Pin-based compact fluorescent ≤ 20 watts2
Linear fluorescent and U-bent fluorescent
≤ 13 watts	Minimum one step between 30-70 percent	Continuous dimming; or Stepped dimming; or
Switching alternate lamps in a luminaire.	
Track Lighting	Minimum one step between 30-70 percent	Continuous dimming; or Stepped dimming; or
Separately switching circuits in multi- circuit track with a minimum of two
circuits.	
Linear fluorescent and U-bent fluorescent
> 13 watts	Minimum one step in each range: 20 - 40 percent
50 - 70 percent
75 - 85 percent
100 percent	Stepped dimming; or Continuous dimming; or
Switching alternate lamps in each luminaire, having a minimum of 4 lamps per luminaire illuminating the same area and in the same manner	
Other light sources, including HID and Induction	Minimum one step between 50 - 70 percent	Stepped dimming; or Continuous dimming; or
Switching alternate lamps in each luminaire, having a minimum of 2 lamps per luminaire, illuminating the
same area and in the same manner.	
Full rated input power of driver, ballast and lamp, corresponding to maximum ballast factor
Includes only pin based lamps: twin tube, multiple twin tube, and spiral lamps

SECTION 130.1 – MANDATORY INDOOR LIGHTING CONTROLS

SECTION 130.2 – OUTDOOR LIGHTING CONTROLS AND EQUIPMENT
Nonresidential and hotel/motel buildings shall comply with the applicable requirements of Sections 130.2(a) through 130.2(c).
Reserved.
Luminaire shielding requirements. All outdoor luminaires of 6,200 initial luminaire lumens or greater shall comply with backlight, uplight and glare (BUG) in accordance with ANSI/IES TM-15-20, Annex A requirements in accordance with Title 24, Part 11, Section 5.106.8.
Exception 1 to Section 130.2(b): Signs.
Exception 2 to Section 130.2(b): Lighting for building facades, public monuments, public art, statues and vertical surfaces of bridges.
Exception 3 to Section 130.2(b): Lighting not permitted by a health or life safety statute, ordinance or regulation to be a cutoff luminaire.
Exception 4 to Section 130.2(b): Temporary outdoor lighting.
Exception 5 to Section 130.2(b): Replacement of existing pole mounted luminaires in hardscape areas meeting all of the following conditions:
Where the existing luminaire does not meet the luminaire BUG requirements in Section 130.2(b); and
Spacing between existing poles is greater than six times the mounting height of the existing luminaires; and
Where no additional poles are being added to the site; and
Where new wiring to the luminaires is not being installed; and
Provided that the connected lighting power wattage is not increased.
Exception 6 to Section 130.2(b): Luminaires that illuminate the public right of way including publicly- maintained or utility-maintained roadways, sidewalks and bikeways.
Exception 7 to Section 130.2(b): Outdoor lighting attached to a hotel/motel building and separately controlled from the inside of a guest room.
Controls for outdoor lighting. Outdoor lighting shall be independently controlled from other electrical loads, and the controls for outdoor lighting shall meet the following functional requirements:
Exception 1 to Section 130.2(c): Outdoor lighting not permitted by a health or life safety statute, ordinance or regulation to be turned OFF or reduced.
Exception 2 to Section 130.2(c): Lighting in tunnels required to be illuminated 24 hours per day and 365 days per year.
Daylight availability. All installed outdoor lighting shall be controlled by a photo control, astronomical time-switch control, or other control capable of automatically shutting OFF the outdoor lighting when daylight is available.
Automatic scheduling controls.
Automatic scheduling controls shall be installed for all outdoor lighting. Automatic scheduling controls may be installed in combination with motion sensing controls or other outdoor lighting controls.
Automatic scheduling controls shall be capable of reducing the outdoor lighting power by at least 50 percent and no more than 90 percent, and separately capable of turning the lighting OFF, during scheduled unoccupied periods.

SECTION 130.2 – OUTDOOR LIGHTING CONTROLS AND EQUIPMENT

Automatic scheduling controls shall allow scheduling of a minimum of two nighttime periods with independent lighting levels, and may include an override function that turns lighting ON during its scheduled dim or OFF state for no more than two hours when an override is initiated.
Motion sensing controls.
Motion sensing controls shall be installed for the following luminaires. Motion sensing controls may be installed for other outdoor lighting and in combination with other outdoor lighting controls.
Outdoor luminaires other than those providing building façade, ornamental hardscape, outdoor dining or outdoor sales frontage lighting, where the bottom of luminaire is mounted 24 feet above grade or lower; and
Bilaterally symmetric outdoor wall-mounted luminaires (typically referred to as “wall packs”) providing building façade, ornamental hardscape or outdoor dining lighting that are mounted 24 feet above grade or lower.
Motion sensing controls shall be capable of reducing the outdoor lighting power of each controlled luminaire by at least 50 percent and no more than 90 percent, and separately capable of turning the luminaire OFF, during unoccupied periods.
Motion sensing controls shall be capable of reducing the lighting to its dim or OFF state no longer than 15 minutes after the area has been vacated, and of returning the lighting to its ON state when the area becomes occupied.
No more than 1,500 watts of lighting power shall be controlled by a single sensor or as a single zone.
Exception 1 to Section 130.2(c)3: Luminaires with a maximum rated wattage of 40 watts each are not required to have motion sensing controls.
Exception 2 to Section 130.2(c)3: Applications listed as Exceptions to Section 140.7(a) are not required to have motion sensing controls.
Exception 3 to Section 130.2(c)3: Lighting subject to a health or life safety statute, ordinance, or regulation may have a minimum time-out period longer than 15 minutes or a minimum dimming level above 50 percent when necessary to comply with the applicable law.
Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and 25943, Public Resources Code.

SECTION 130.2 – OUTDOOR LIGHTING CONTROLS AND EQUIPMENT

SECTION 130.3 – SIGN LIGHTING CONTROLS
Nonresidential buildings other than healthcare facilities and hotel/motel buildings shall comply with the applicable requirements of Sections 130.3(a)1 through 130.3(a)3.
Controls for sign lighting. All sign lighting shall meet the requirements below as applicable:
Indoor signs. All indoor sign lighting other than exit sign lighting shall be controlled with an automatic time-switch control or astronomical time-switch control.
Outdoor signs. Outdoor sign lighting shall meet the following requirements as applicable:
All outdoor sign lighting shall be controlled with a photocontrol in addition to an automatic time- switch control, or an astronomical time-switch control.
Exception to Section 130.3(a)2A: Outdoor signs in tunnels, and signs in large permanently covered outdoor areas that are intended to be continuously lit, 24 hours per day and 365 days per year.
All outdoor sign lighting that is ON both day and night shall be controlled with a dimmer that provides the ability to automatically reduce sign lighting power by a minimum of 65 percent during nighttime hours. Signs that are illuminated at night and for more than 1 hour during daylight hours shall be considered ON both day and night.
Exception to Section 130.3(a)2B: Outdoor signs in tunnels and large covered areas that are intended to be illuminated both day and night.
Demand responsive Electronic Message Center (EMC) control. See Section 110.12 for requirements for demand responsive EMC controls.
Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and 25943, Public Resources Code.

SECTION 130.3 – SIGN LIGHTING CONTROLS

SECTION 130.4 –LIGHTING CONTROL ACCEPTANCE AND INSTALLATION CERTIFICATE REQUIREMENTS
Nonresidential buildings other than healthcare facilities and hotel/motel buildings shall comply with the applicable requirements of Sections 130.4(a) through 130.4(c). Healthcare facilities shall comply with the applicable acceptance and installation documentation requirements of OSHPD.
Lighting and receptacle control acceptance requirements. Before an occupancy permit is granted, indoor and outdoor lighting and receptacle controls serving the building, area or site and installed to comply with Section 110.12, 130.1, 130.2, 130.5 or 140.6 shall be certified as meeting the Acceptance Requirements for Code Compliance as specified by the Reference Nonresidential Appendix NA7.6 and NA7.8. A Certificate of Acceptance shall be submitted to the enforcement agency under Section 10-103(a) of Part 1, that the equipment and systems meet the acceptance requirements:
Reserved.
Reserved.
Automatic daylight controls shall be tested in accordance with Reference Nonresidential Appendix NA7.6.1;
Lighting shut-OFF controls shall be tested in accordance with Reference Nonresidential Appendix NA7.6.2;
Demand responsive lighting controls shall be tested in accordance with Reference Nonresidential Appendix NA7.6.3; and
Outdoor lighting controls shall be tested in accordance with Reference Nonresidential Appendix NA7.8; and
Lighting systems receiving the Institutional Tuning Power Adjustment Factor shall be tested in accordance with Reference Nonresidential Appendix NA7.6.4.
Demand responsive controls required to control controlled receptacles shall be tested in accordance with Reference Nonresidential Appendix NA7.6.5.
Lighting control installation certificate requirements. To be recognized for compliance with Part 6 an installation certificate shall be submitted in accordance with Section 10-103(a) for any lighting control system, energy management control system, interlocked lighting system, lighting power adjustment factor, or additional wattage available for a videoconference studio, in accordance with the following requirements, as applicable:
Certification that when a lighting control system is installed to comply with lighting control requirements in Part 6 it complies with the applicable requirements of Section 110.9; and complies with Reference Nonresidential Appendix NA7.7.1.
Certification that when an energy management control system is installed to function as a lighting control required by Part 6 it functionally meets all applicable requirements for each application for which it is installed, in accordance with Sections 110.9, 130.0 through 130.5, 140.6 through 150.0, and 150.2; and complies with Reference Nonresidential Appendix NA7.7.2.
Reserved.
Reserved.
Certification that interlocked lighting systems used to serve an approved area comply with Section 140.6(a)1; and comply with Reference Nonresidential Appendix NA7.7.4.
Certification that lighting controls installed to earn a lighting power adjustment factor (PAF) comply with Section 140.6(a)2; and comply with Reference Nonresidential Appendix NA7.7.5.
Certification that additional lighting wattage installed for a videoconference studio complies with Section 140.6(c)2Gvii; and complies with Reference Nonresidential Appendix NA7.7.6.

SECTION 130.4 –LIGHTING CONTROL ACCEPTANCE AND INSTALLATION CERTIFICATE REQUIREMENTS

When certification is required by Title 24, Part 1, Section 10-103.1, the acceptance testing specified by Section
130.4 shall be performed by a Certified Lighting Controls Acceptance Test Technician (CLCATT). If the CLCATT is operating as an employee, the CLCATT shall be employed by a Certified Lighting Controls Acceptance Test Employer. The CLCATT shall disclose on the Certificate of Acceptance a valid CLCATT certification identification number issued by an approved acceptance test technician certification provider. The CLCATT shall complete all certificate of acceptance documentation in accordance with the applicable requirements in Section 10-103(a)4.

Note: Authority cited: Sections 25402, 25402.1 and 25213, Public Resources Code. Reference: Sections 25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and 25943, Public Resources Code.

SECTION 130.4 –LIGHTING CONTROL ACCEPTANCE AND INSTALLATION CERTIFICATE REQUIREMENTS

SECTION 130.5 –ELECTRICAL POWER DISTRIBUTION SYSTEMS
Nonresidential and hotel/motel buildings shall comply with the applicable requirements of Sections 130.5(a) through 130.5(e).
Service electrical metering. Each electrical service or feeder shall have a permanently installed metering system which measures electrical energy use in accordance with Table 130.5-A.
Exception 1 to Section 130.5(a): Service or feeder for which the utility company provides a metering system that indicates instantaneous kW demand and kWh for a utility-defined period.
Exception 2 to Section 130.5(a): Electrical power distribution systems subject to California Electrical Code Article 517.
Separation of electrical circuits for electrical energy monitoring. Electrical power distribution systems shall be designed so that measurement devices can monitor the electrical energy usage of load types according to Table 130.5-B.
Exception 1 to Section 130.5(b): For each separate load type, up to 10 percent of the connected load may be of any type.
Exception 2 to Section 130.5(b): Electrical power distribution systems subject to California Electrical Code Article 517.
Voltage drop. The maximum combined voltage drop on both installed feeder conductors and branch circuit conductors to the farthest connected load or outlet shall not exceed 5 percent.
Exception to Section 130.5(c): Voltage drop permitted by California Electrical Code Sections 647.4, 695.6 and 695.7.
Circuit controls for 120-volt receptacles and controlled receptacles. In all buildings, both controlled and uncontrolled 120 volt receptacles shall be provided in office areas, lobbies, conference rooms, kitchen areas in office spaces and copy rooms. Additionally, hotel/motel guest rooms shall comply with Section 130.5(d)4. Controlled receptacles shall meet the following requirements, as applicable:
Install a control capable of automatically shutting OFF the controlled receptacles when the space is typically unoccupied, either at the receptacle or circuit level. When an automatic time switch control is installed it shall incorporate an override control that allows the controlled receptacle to remain ON for no more than 2 hours when an override is initiated and an automatic holiday “shut-OFF” feature that turns OFF all loads for at least 24 hours and then resumes the normally scheduled operation. Countdown timer switches shall not be used to comply with the automatic time switch control requirements; and
Install at least one controlled receptacle within 6 feet from each uncontrolled receptacle or install a splitwired receptacle with at least one controlled and one uncontrolled receptacle. Where receptacles are installed in modular furniture in open office areas, at least one controlled receptacle shall be installed at each workstation; and
Provide a permanent and durable marking for controlled receptacles or circuits to differentiate them from uncontrolled receptacles or circuits; and
For hotel and motel guest rooms, install controlled receptacles for at least one-half of the 120-volt receptacles in each guestroom. Electric circuits serving controlled receptacles in guestrooms shall have captive card key controls, occupant sensing controls, or automatic controls so the power is switched OFF no longer than 30 minutes after the guestroom has been vacated.
Note: A hardwired power strip controlled by an occupant sensing control may be used to comply with Section 130.5(d). Plug-in strips and other plug-in devices shall not be used to comply with the requirements of Section 130.5(d).
Exception 1 to Section 130.5(d): Receptacles that are only for the following purposes:
Receptacles specifically for refrigerators and water dispensers in kitchen area.

SECTION 130.5 –ELECTRICAL POWER DISTRIBUTION SYSTEMS

Receptacles located a minimum of six feet above the floor that are specifically for clocks.
Receptacles for network copiers, fax machines, A/V and data equipment other than personal computers in copy rooms.
Receptacles on circuits rated more than 20 amperes.
Receptacles connected to an uninterruptible power supply (UPS) that are intended to be in continuous use, 24 hours per day/365 days per year, and are marked to differentiate them from other uncontrolled receptacles or circuits.
Exception 2 to Section 130.5(d): Receptacles in healthcare facilities.
Demand responsive controls and equipment. See Section 110.12 for requirements for demand responsive controls and equipment, including demand responsive controls for controlled receptacles.
NOTE: Definitions of terms and phrases in Section 130.5 are determined as specified in Section 100.1(b). Terms and phrases not found in Section 100.1(b) shall be defined as specified in Title 24, Part 3, Article 100 of the California Electrical Code.
Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code.

TABLE 130.5-A MINIMUM REQUIREMENTS FOR METERING OF ELECTRICAL LOAD
Metering Functionality	Electrical Services rated 50 kVA or less	Electrical Services rated more than 50kVA and less than or equal to 250 kVA	Electrical Services rated more than 250 kVA and less than or equal to 1000kVA	Electrical Services rated more than 1000kVA	
Instantaneous (at the time) kW demand	Required	Required	Required	Required	
Historical peak demand (kW)	Not required	Not required	Required	Required	
Tracking kWh for a user- definable period.	Required	Required	Required	Required	
kWh per rate period	Not required	Not required	Not required	Required	

SECTION 130.5 –ELECTRICAL POWER DISTRIBUTION SYSTEMS

TABLE 130.5-B MINIMUM REQUIREMENTS FOR SEPARATION OF ELECTRICAL LOAD
ELECTRICAL LOAD TYPE	ELECTRICAL SERVICES RATED 50 kVA OR LESS	ELECTRICAL SERVICES RATED MORE THAN 50 kVA AND LESS THAN OR EQUAL TO 250 kVA	ELECTRICAL SERVICES RATED MORE THAN 250 kVA AND LESS THAN OR EQUAL TO 1000 kVA	ELECTRICAL SERVICES RATED MORE THAN 1000
kVA	
Lighting including exit and egress lighting and exterior lighting	Not required	All lighting in aggregate	All lighting disaggregated
by floor, type or area	All lighting disaggregated by floor, type or area	
HVAC systems and components including chillers, fans, heaters, furnaces, package units, cooling towers and circulation pumps associated with HVAC	Not required	All HVAC in aggregate	All HVAC in aggregate and each HVAC load rated
at least 50 kVA	All HVAC in aggregate and each HVAC load rated at least 50 kVA	
Domestic and service water system pumps and related systems and components	Not required	All loads in aggregate	All loads in aggregate	All loads in aggregate	
Plug load including appliances rated less than 25 kVA	Not required	All plug load in aggregate
Groups of plug loads exceeding 25 kVA connected load in an area less than 5000 sf	All plug load separated by floor, type or area Groups of plug loads
exceeding 25 kVA
connected load in an area less than 5000 sf	All plug load separated by floor, type or area All groups of plug loads
exceeding 25 kVA
connected load in an area less than 5000 sf	
Elevators, escalators, moving walks and transit systems	Not required	All loads in aggregate	All loads in aggregate	All loads in aggregate	
Other individual non- HVAC loads or appliances rated 25 kVA or greater	Not required	All loads in aggregate	All loads in aggregate	All loads in aggregate	
Industrial and commercial load centers 25 kVA or greater, including theatrical lighting installations and commercial kitchens	Not required	All loads in aggregate	All loads in aggregate	All loads in aggregate	
Renewable power source (net or total)	Each group	Each group	Each group	Each group	
Loads associated with renewable power source	Not required	All loads in aggregate	All loads in aggregate	All loads in aggregate	
Charging stations for electric vehicles	All loads in aggregate	All loads in aggregate	All loads in aggregate	All loads in aggregate	

Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and 25943, Public Resources Code.

SECTION 130.5 –ELECTRICAL POWER DISTRIBUTION SYSTEMS

SUBCHAPTER 5
NONRESIDENTIAL AND HOTEL/MOTEL OCCUPANCIES— PERFORMANCE AND PRESCRIPTIVE COMPLIANCE APPROACHES FOR ACHIEVING ENERGY EFFICIENCY

SECTION 140.0 – PERFORMANCE AND PRESCRIPTIVE COMPLIANCE APPROACHES
Nonresidential and hotel/motel buildings shall comply with all of the following:
The requirements of Sections 100.0 through 110.12 applicable to the building project (mandatory measures for all buildings).
The requirements of Sections 120.0 through 130.5 (mandatory measures for nonresidential and hotel/motel buildings).
Either the performance compliance approach (energy budgets) specified in Section 140.1 or the prescriptive compliance approach specified in Section 140.2 for the climate zone in which the building will be located. Climate zones are shown in Figure 100.1-A.
Note to Section 140.0(c): The Commission periodically updates, publishes and makes available to interested persons and local enforcement agencies precise descriptions of the climate zones, which is available by zip code boundaries depicted in the Reference Joint Appendices along with a list of the communities in each zone.
Note to Section 140.0: The requirements of Sections 140.1 through 140.10 apply to newly constructed buildings. Section 141.0 specifies which requirements of Sections 140.1 through 140.10 also apply to additions or alterations to existing buildings.
Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and 25943, Public Resources Code.

SECTION 140.0 – PERFORMANCE AND PRESCRIPTIVE COMPLIANCE APPROACHES

SECTION 140.1 – PERFORMANCE APPROACH: ENERGY BUDGETS
A building complies with the performance approach if the energy budget calculated for the proposed design building under Subsection (b) is no greater than the energy budget calculated for the standard design building under Subsection (a).
Energy budget for the standard design building. The energy budget for the Standard Design Building is determined by applying the mandatory and prescriptive requirements to the proposed design building. The energy budget is the sum of the source energy and TDV energy for space-conditioning, indoor lighting, mechanical ventilation, photovoltaic (PV) and battery storage systems, service water heating and covered process loads.
Energy budget for the proposed design building. The energy budget for a proposed design building is determined by calculating the source energy and TDV energy for the proposed design building. The energy budget is the sum of the source energy and TDV energy for space-conditioning, indoor lighting, mechanical ventilation, photovoltaic (PV) and battery storage systems, and service water heating and covered process loads.
EXCEPTION to Section 140.1(b). A community shared solar electric generation system, or other renewable electric generation system, and/or community shared battery storage system, which provides dedicated power, utility energy reduction credits, or payments for energy bill reductions, to the permitted building and is approved by the Energy Commission as specified in Title 24, Part 1, Section 10-115, may offset part or all of the solar electric generation system or battery storage system TDV energy required to comply with the Standards, as calculated according to methods established by the Commission in the Nonresidential ACM Reference Manual.
Calculation of energy budget. The TDV energy for both the standard design building and the proposed design building shall be computed by compliance software certified for this use by the Commission. The processes for compliance software approval by the Commission are documented in the ACM Approval Manual.
Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and 25943, Public Resources Code.

SECTION 140.1 – PERFORMANCE APPROACH: ENERGY BUDGETS

SECTION 140.2 – PRESCRIPTIVE APPROACH
To comply using the prescriptive approach a building shall be designed with and shall have constructed and installed systems and components meeting the applicable requirements of Sections 140.3 through 140.10.
Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and 25943, Public Resources Code.

SECTION 140.2 – PRESCRIPTIVE APPROACH

SECTION 140.3 – PRESCRIPTIVE REQUIREMENTS FOR BUILDING ENVELOPES
A building complies with this section by being designed with and constructed to meet all prescriptive requirements in Subsection (a) and the requirements of Subsection (c) and (d) where they apply.
Envelope component requirements.
Exterior roofs and ceilings. Exterior roofs and ceilings shall comply with each of the applicable requirements in this subsection:
Roofing products. Shall meet the requirements of Section 110.8 and the applicable requirements of Subsections i through ii:
Nonresidential buildings:
Low-sloped roofs in climate zones 1 through 16 shall have:
A minimum aged solar reflectance of 0.63 and a minimum thermal emittance of 0.75; or
A minimum solar reflectance index (SRI) of 75.
Exception 1 to Section 140.3(a)1Aia: Wood-framed roofs in climate zones 3 and 5 are exempt from the requirements of Section 140.3(a)1Aia if the roof assembly has a U-factor of
0.034 or lower.
Exception2 to Section 140.3(a)1Aia: Roof constructions with a weight of at least 25 lb/ft2 over the roof membrane are exempt from the requirements of Section 140.3(a)1Aia.
Exception 3 to Section 140.3(a)1Aia: An aged solar reflectance less than 0.63 is allowed provided the maximum roof/ceiling U-factor in Table 140.3 is not exceeded.
Steep-sloped roofs:
In Climate Zones 1 and 3 shall have a minimum aged solar reflectance of 0.20 and a minimum thermal emittance of 0.75, or a minimum SRI of 16.
In Climate Zones 2 and 4 through 16 shall have a minimum aged solar reflectance of 0.25 and a minimum thermal emittance of 0.80, or a minimum SRI of 23.
Guest rooms of hotel and motel buildings:
Low-sloped roofs in Climate Zones 9, 10, 11, 13, 14 and 15 shall have a minimum aged solar reflectance of 0.55 and a minimum thermal emittance of 0.75, or a minimum SRI of 64.
Exception to Section 140.3(a)1Aiia: Roof constructions with a weight of at least 25 lb/ft2 over the roof membrane.
Steep-sloped roofs in Climate Zones 2 through 15 shall have a minimum aged solar reflectance of 0.20 and a minimum thermal emittance of 0.75, or a minimum SRI of 16.

TABLE 140.3 ROOF/CEILING INSULATION TRADEOFF FOR AGED SOLAR REFLECTANCE – NONRESIDENTIAL BUILDINGS
Aged Solar Reflectance	Metal Building
Climate Zone 1-16
U-factor	Wood framed and Other
Climate Zone 6 - 8
U-factor	Wood Framed and Other
All Other Climate Zones
U-factor	
0.62-0.56	0.038	0.045	0.032	
0.55-0.46	0.035	0.042	0.030	
0.45-0.36	0.033	0.039	0.029	
0.35-0.25	0.031	0.037	0.028	

Exception to Section 140.3(a)1A: Roof area covered by building integrated photovoltaic panels and building integrated solar thermal panels are not required to meet the minimum requirements for solar reflectance, thermal emittance, or SRI.
Roof insulation. Roofs shall have an overall assembly U-factor no greater than the applicable value in Table 140.3-B, C or D, and where required by Section 110.8 and 120.7(a)3, insulation shall be placed in direct contact with a roof or drywall ceiling.
Exterior walls. Exterior walls shall have an overall assembly U-factor no greater than the applicable value in Table 140.3-B, C or D.
Demising walls. Demising walls shall meet the requirements of Section 120.7(b)7. Vertical windows in demising walls between conditioned and unconditioned spaces shall have an area-weighted average U- factor no greater than the applicable value in Table 140.3-B, C or D.
Exterior floors and soffits. Exterior floors and soffits shall have an overall assembly U-factor no greater than the applicable value in Table 140.3-B, C or D.
Exterior Windows. Vertical windows in exterior walls shall:
Percent window area shall be limited in accordance with the applicable requirements of i and ii below:
a west-facing area no greater than 40 percent of the gross west-facing exterior wall area, or 6 feet times the west-facing display perimeter, whichever is greater; and
a total area no greater than 40 percent of the gross exterior wall area, or 6 feet times the display perimeter, whichever is greater; and
NOTE: Demising walls are not exterior walls, and therefore demising wall area is not part of the gross exterior wall area or display perimeter and windows in demising walls are not part of the window area.
Exception to Section 140.3(a)5A: Conditioned greenhouses. The requirements of Section 120.6(h)4 apply.
Have an area-weighted average U-factor no greater than the applicable value in Table 140.3-B, C or D.
Exception 1 to Section 140.3(a)5B: Conditioned greenhouses. The requirements of Section 120.6(h)4 apply.
Exception 2 to Section 140.3(a)5B: For vertical windows containing chromogenic type glazing:

The lower-rated labeled U-factor shall be used with automatic controls to modulate the amount of heat flow into the space in multiple steps in response to daylight levels or solar intensity; and
Chromogenic glazing shall be considered separately from other glazing; and
Area-weighted averaging with other glazing that is not chromogenic shall not be permitted.
Have an area-weighted average relative solar heat gain coefficient, RSHGC, excluding the effects of interior shading, no greater than the applicable value in Table 140.3-B, C or D.
For purposes of this paragraph, the relative solar heat gain coefficient, RSHGC, of a vertical window is:
The solar heat gain coefficient of the windows; or
Relative solar heat gain coefficient is calculated using Equation 140.3-A, if the window has an overhang or exterior horizontal slats that extend beyond each side of the window jamb by a distance equal to the overhang’s horizontal projection.
Exception 1 to Section 140.3(a)5C: An area- weighted average relative solar heat gain coefficient of
0.56 or less shall be used for windows:
That are in the first story of exterior walls that form a display perimeter; and
For which codes restrict the use of overhangs to shade the windows.
Exception 2 to Section 140.3(a)5C: For vertical glazing containing chromogenic type glazing:
the lower-rate labeled RSHGC shall be used with automatic controls to modulate the amount of heat flow into the space in multiple steps in response to daylight levels or solar intensity; and
chromogenic glazing shall be considered separately from other glazing; and
area-weighted averaging with other glazing that is not chromogenic shall not be permitted.
Exception 3 to Section 140.3(a)5C: Conditioned greenhouses. The requirements of Section 120.6(h)4 apply.
NOTE: Demising walls are not exterior walls, and therefore windows in demising walls are not subject to SHGC requirements.
Have an area-weighted average Visible Transmittance (VT) no less than the applicable value in Tables 140.3-B and C, or Equation 140.3-B, as applicable.
Exception 1 to Section 140.3(a)5D: When the window’s primary and secondary sidelit daylit zones are completely overlapped by one or more skylit daylit zones, then the window need not comply with Section 140.3(a)5D.
Exception 2 to Section 140.3(a)5D: If the window’s VT is not within the scope of NFRC 200, or ASTM E972, then the VT shall be calculated according to Reference Nonresidential Appendix NA6.
Exception 3 to Section 140.3(a)5D: For vertical windows containing chromogenic type glazing:
The higher-rate labeled VT shall be used with automatic controls to modulate the amount of light transmitted into the space in multiple steps in response to daylight levels or solar intensity; and
Chromogenic glazing shall be considered separately from other glazing; and
Area-weighted averaging with other glazing that is not chromogenic shall not be permitted.
Exception 4 to Section 140.3(a)5D: Conditioned greenhouses. The requirements of Section 120.6(h)4 apply.
NOTE: Demising walls are not exterior walls, and therefore windows in demising walls are not subject to VT requirements.

EQUATION 140.3-A RELATIVE SOLAR HEAT GAIN COEFFICIENT, RSHGC
RSHGC = SHGC × [1 + a × (2.72-PF – 1) × (sin(b × Az) – c]
where:

a	
b	
c	

Overhang	
0.150	
0.130	
5.67	

Exterior Horizonal Slat	
0.144	
0.133	
5.13	

RSHGC	=	Relative Solar Heat Gain Coefficient.	
SHGC	=	Solar Heat Gain Coefficient of the vertical fenestration.	
Az	=	Azimuth of the vertical fenestration in degrees.	
PF	=	Projection factor as calculated by Equation 140.3-C.	

EQUATION 140.3-B VERTICAL FENESTRATION MINIMUM VT
VT ≥ 0.11/ WWR
WHERE:

WWR	=	Window Wall Ratio, the ratio of (i) the total window area of the entire building to (ii)
the total gross exterior wall area of the entire building. If the WWR is greater than 0.40, then 0.40 shall be used as the value for WWR in EQUATION 140.3-B.	
VT	=	Visible Transmittance of framed window.	
Skylights. Skylights shall:
Have an area no greater than 5 percent of the gross exterior roof area Skylight Roof Ratio (SRR); and
Exception 1 to Section 140.3(a)6A: Buildings with atria over 55 feet high shall have a skylight area no greater than 10 percent of the gross exterior roof area.
Exception 2 to Section 140.3(a)6A: Conditioned greenhouses. The requirements of Section 120.6(h)4 apply.
Have an area-weighted performance rating U-factor no greater than the applicable value in Table 140.3-B, C or D.

Exception 1 to Section 140.3(a)6B: For skylights containing chromogenic type glazing:
the lower-rate labeled U-factor shall be used with automatic controls to modulate the amount of heat flow into the space in multiple steps in response to daylight levels or solar intensity; and
chromogenic glazing shall be considered separately from other glazing; and
area-weighted averaging with other glazing that is not chromogenic shall not be permitted.
Exception 2 to Section 140.3(a)6B: Conditioned greenhouses. The requirements of Section 120.6(h)4 apply.
Have an area-weighted performance rating solar heat gain coefficient no greater than the applicable value in Table 140.3-B, C or D.
Exception 1 to Section 140.3(a)6C: For skylights containing chromogenic type glazing:
the lower-rated labeled SHGC shall be used to demonstrate compliance with this section; and
chromogenic glazing shall be considered separately from other glazing; and
area-weighted averaging with other glazing that is not chromogenic shall not be permitted.

Exception 2 to Section 140.3(a)6C: Conditioned greenhouses. The requirements of Section 120.6(h)4 apply.
Have an area-weighted performance rating VT no less than the applicable value in Table 140.3-B or C; and
Exception 1 to Section 140.3(a)6D: For skylights containing chromogenic type glazing:
the higher-rated labeled VT shall be used with automatic controls to modulate the amount of light transmitted into the space in multiple steps in response to daylight levels or solar intensity and;
chromogenic glazing shall be considered separately from other glazing; and
area-weighted averaging with other glazing that is not chromogenic shall not be permitted.
Exception 2 to Section 140.3(a)6D: Conditioned greenhouses. The requirements of Section 120.6(h)4 apply.
Have a glazing material or diffuser that has a measured haze value greater than 90 percent, determined according to ASTM D1003 or other test method approved by the Energy Commission.
Exception 1 to Section 140.3(a)6E: Skylights designed and installed to exclude direct sunlight entering the occupied space by the use of fixed or automated baffles or the geometry of the skylight and light well.
Exception 2 to Section 140.3(a)6E: Conditioned greenhouses. The requirements of Section 120.6(h)4 apply.
Exterior doors. All exterior doors that separate conditioned space from unconditioned space or from ambient air shall have a U-factor not greater than the applicable value in Table 140.3-B, C or D. Doors that are more than one-quarter glass in area are considered glazed doors.
Relocatable public school buildings. In complying with Sections 140.3(a)1 to 7 shall meet the following:
Relocatable public school buildings shall comply with Table 140.3-B for a specific climate zone when the manufacturer or builder of the relocatable public school building certifies that the building is intended for use only in a specific climate zone; or

Relocatable public school buildings shall comply with Table 140.3-D for any climate zone when the manufacturer or builder of the relocatable public school building certifies that the building is intended for use in any climate zone; and
The manufacturer or builder of a relocatable public school building shall certify that components of the building comply with requirements of this section by:
The placement of two (2) metal identification labels on the building, one mechanically fastened and visible from the exterior and the other mechanically fastened to the interior frame above the ceiling at the end of the module, both labels stating (in addition to any other information by the Division of the State Architect or other law) “Complies with Title 24, Part 6 for all climate zones”; and
Identification of the location of the two labels on the plans submitted to the enforcing agency.
Air barrier. To meet the requirement of Table 140.3-B, all buildings shall have a continuous air barrier that is designed and constructed to control air leakage into, and out of, the building’s conditioned space.
Exception to Section 140.3(a)9: Relocatable public school buildings.
Design. Construction documents shall include air barrier boundaries, interconnections and penetrations, and associated square foot calculations for all sides of the air barrier.
Acceptable materials and assemblies. The air barrier shall be sealed at all joints for its entire length and shall be composed of:
Materials that have an air permeance not exceeding 0.004 cfm/ft2, under a pressure differential of
0.3 in. of water (1.57 psf) (0.02 L/sec-m2) at 75 Pa), when tested in accordance with ASTM E2178; or
Assemblies of materials and components that have an average air leakage not exceeding 0.04 cfm/ft2, under a pressure differential of 0.3 in. of water (1.57 psf) (0.2 L/m2 at 75 pa), when tested in accordance with ASTM E2357, ASTM E1677, ASTM E1680 or ASTM E283.
Exception to Section 140.3(a)9 Bi: Materials in Table 140.3-A shall be deemed to comply with Section 140.3(a)9B provided that all joints are sealed, and all of the materials are installed as air barriers in accordance with the manufacturer's instructions.
Exception to Section 140.3(a)9Bii: The following materials shall be deemed to comply with Section 140.3(a)9B if all joints are sealed and all of the materials are installed as air barriers in accordance with the manufacturer’s instructions:
Concrete masonry walls that have at least two coatings of paint or at least two coatings of sealer coating.
Concrete masonry walls with integral rigid board insulation.
Structurally insulated panels.
Portland cement or Portland sand parge, or stucco, or a gypsum plaster, each with a minimum 1/2 inch thickness.
Verification. Verification of the installed air barrier may be performed.
If verification is performed the entire building shall meet one of the following requirements:
An air leakage rate not exceeding 0.40 cfm/ft2 at a pressure differential of 0.3 in. of water (1.57 psf) (2.0 L/m2 at 75 Pa). when the entire building is tested, after completion of construction, in accordance with NA 5, or another test method approved by the Commission; or
For buildings that have more than 50,000 ft2 of conditioned floor area, a sectional test method of co-pressurizing representative test floors and taking data from the specific floors

to achieve the requirement in Section 140.3(a)9Ci when following the procedures in Sections NA5.2 to NA5.7. Representative test floors must meet the following conditions:
The entire floor area of all stories that have any spaces directly under a roof.
The entire floor area of all stories that have a building entrance or loading dock.
Representative above grade wall sections of the building totaling at least 25 percent of the wall area enclosing the remaining conditioned space. Floor areas in Parts a and b above shall not be included in the 25 percent.
If the air leakage requirements of either Section 140.3(a)9Cia or 140.3(a)9Cib are not met, a visual inspection and diagnostic evaluation shall be completed in accordance with NA5.7, all observed leaks shall be sealed where such sealing can be made without destruction of existing building components, and buildings where the tested leakage rate exceeded 0.6 cfm/ft2 of building shell area at 75 Pa have been retested to confirm leakage is below 0.6 cfm/ft2 of building shell at 75 Pa.

TABLE 140.3-A MATERIALS DEEMED TO COMPLY WITH SECTION 140.3(a)9B
	MATERIALS	MINIMUM THICKNESS	
1	Plywood	Minimum 3/8inches thickness	
2	Oriented strand board	Minimum 3/8 inches thickness	
3	Extruded polystyrene insulation board	Minimum 1/2 inches thickness	
4	Foil-backed polyisocyanurate insulation board	Minimum 1/2 inches thickness	
5	Closed cell spray foam with a minimum density of 2.0 pcf	Minimum 2 inches thickness	

6	Open cell spray foam with a density no less than 0.4 pcf and no greater than 1.5 pcf	
Minimum 5-1/2 inches thickness	
7	Exterior and interior gypsum board	Minimum 1/2 inches thickness	
8	Cement board	Minimum 1/2 inches thickness	
9	Built up roofing membrane	No minimum thickness	
10	Modified bituminous roof membrane	No minimum thickness	
11	Fully adhered single-ply roof membrane	No minimum thickness	

12	A Portland cement or Portland sand parge, or a gypsum plaster	
Each with Minimum 5/8 inches thickness	
13	Cast-in-place concrete, or precast concrete	No minimum thickness	
14	Fully grouted concrete block masonry	No minimum thickness	
15	Sheet steel or sheet aluminum	No minimum thickness	

TABLE 140.3-B – PRESCRIPTIVE ENVELOPE CRITERIA FOR NONRESIDENTIAL BUILDINGS (INCLUDING RELOCATABLE PUBLIC SCHOOL BUILDINGS (WHERE MANUFACTURER CERTIFIES USE ONLY IN SPECIFIC CLIMATE ZONE; NOT INCLUDING HIGH-RISE RESIDENTIAL BUILDINGS AND GUEST ROOMS OF HOTEL/MOTEL BUILDINGS)
	Climate Zone	
	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	
Envelope	Maximum U-factor	Roofs/ Ceilings	Metal Building	0.041	0.041	0.041	0.041	0.041	0.041	0.041	0.041	0.041	0.041	0.041	0.041	0.041	0.041	0.041	0.041	
			Wood Framed and Other	0.034	0.034	0.034	0.034	0.034	0.049	0.049	0.049	0.034	0.034	0.034	0.034	0.034	0.034	0.034	0.034	
		Walls	Metal Building	0.113	0.061	0.113	0.061	0.061	0.113	0.113	0.061	0.061	0.061	0.061	0.061	0.061	0.061	0.057	0.061	
			Metal-framed	0.060	0.055	0.071	0.055	0.055	0.060	0.060	0.055	0.055	0.055	0.055	0.055	0.055	0.055	0.055	0.055	
			Mass Light1	0.196	0.170	0.278	0.227	0.440	0.440	0.440	0.440	0.440	0.170	0.170	0.170	0.170	0.170	0.170	0.170	
			Mass Heavy1	0.253	0.650	0.650	0.650	0.650	0.690	0.690	0.690	0.690	0.650	0.184	0.253	0.211	0.184	0.184	0.160	
			Wood-framed and Other	0.095	0.059	0.110	0.059	0.102	0.110	0.110	0.102	0.059	0.059	0.045	0.059	0.059	0.059	0.042	0.059	
		Floors/ Soffits	Raised Mass	0.092	0.092	0.269	0.269	0.269	0.269	0.269	0.269	0.269	0.269	0.092	0.092	0.092	0.092	0.092	0.058	
			Other	0.048	0.039	0.071	0.071	0.071	0.071	0.071	0.071	0.071	0.071	0.039	0.071	0.071	0.039	0.039	0.039	
	Roofing Products	Low- sloped	Aged Solar Reflectance	0.63	0.63	0.63	0.63	0.63	0.63	0.63	0.63	0.63	0.63	0.63	0.63	0.63	0.63	0.63	0.63	
			Thermal Emittance	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	
		Steep- Sloped	Aged Solar Reflectance	0.20	0.25	0.20	0.25	0.25	0.25	0.25	0.25	0.25	0.25	0.25	0.25	0.25	0.25	0.25	0.25	
			Thermal Emittance	0.75	0.80	0.75	0.80	0.80	0.80	0.80	0.80	0.80	0.80	0.80	0.80	0.80	0.80	0.80	0.80	
	Air Barrier	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	
	Exterior Doors, Maximum U-factor	Non-Swinging	0.50	1.45	1.45	1.45	1.45	1.45	1.45	1.45	1.45	1.45	1.45	1.45	1.45	1.45	1.45	0.50	
		Swinging	0.70	0.70	0.70	0.70	0.70	0.70	0.70	0.70	0.70	0.70	0.70	0.70	0.70	0.70	0.70	0.70	

CONTINUED: TABLE 140.3-B – PRESCRIPTIVE ENVELOPE CRITERIA FOR NONRESIDENTIAL BUILDINGS (INCLUDING RELOCATABLE PUBLIC SCHOOL BUILDINGS WHERE MANUFACTURER CERTIFIES USE ONLY IN SPECIFIC CLIMATE ZONE; NOT INCLUDING HIGH-RISE RESIDENTIAL BUILDINGS AND GUEST ROOMS OF HOTEL/MOTEL BUILDINGS)
Envelope	Fenestration				Climate Zone	
					1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	
		Vertical			Fixed Window	
			Area-weighted Performance Rating	Max U-factor	0.36	0.36	0.36	0.36	0.36	0.36	0.36	0.36	0.34	0.36	0.34	0.34	0.34	0.34	0.34	0.36	
				Max RSHGC	0.25	0.25	0.25	0.25	0.25	0.25	0.25	0.25	0.22	0.25	0.22	0.22	0.22	0.22	0.22	0.25	
				Min VT	0.42	
					Curtainwall or Storefront	
				Max U-factor	0.38	0.41	0.41	0.41	0.41	0.41	0.38	0.41	0.41	0.41	0.41	0.41	0.41	0.41	0.41	0.41	
				Max RSHGC	0.25	0.26	0.26	0.26	0.26	0.26	0.25	0.26	0.26	0.26	0.26	0.26	0.26	0.26	0.26	0.26	
				Min VT	0.46	
					Operable Window	
				Max U-factor	0.46	
				Max RSHGC	0.22	
				Min VT	0.32	
					Glazed Doors	
				Max U-factor	0.45	
				Max RSHGC	0.23	
				Min VT	0.17	
			Max WWR%		40%	

					All Climate Zones	
		Skylights			Glass, Curb Mounted	Glass, Deck Mounted	Plastic, Curb Mounted	Tubular Daylighting Devices (TDDs)	
			Area-Weighted Performance Rating	Max U-factor	0.58	0.46	0.88	0.88	
				Max SHGC	0.25	0.25	NR	NR	
				Min VT
(Min VTannual for TDDs)	0.49	0.49	0.64	0.38	
			Maximum SRR%		5%	

TABLE 140.3-C – PRESCRIPTIVE ENVELOPE CRITERIA FOR GUEST ROOMS OF HOTEL/MOTEL BUILDINGS
	Climate Zone	
	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	
Envelope	Maximum U-factor	Roofs / Ceilings	Metal Building	0.041	0.041	0.041	0.041	0.041	0.041	0.041	0.041	0.041	0.041	0.041	0.041	0.041	0.041	0.041	0.041	
			Wood Framed and Other	0.028	0.028	0.034	0.028	0.034	0.034	0.039	0.028	0.028	0.028	0.028	0.028	0.028	0.028	0.028	0.028	
		Walls	Metal Building	0.061	0.061	0.061	0.061	0.061	0.061	0.061	0.061	0.061	0.061	0.057	0.057	0.057	0.057	0.057	0.057	
			Metal-framed	0.069	0.069	0.069	0.069	0.069	0.069	0.105	0.069	0.069	0.069	0.069	0.069	0.069	0.069	0.048	0.069	
			Mass, Light1	0.170	0.170	0.170	0.170	0.170	0.227	0.227	0.227	0.196	0.170	0.170	0.170	0.170	0.170	0.170	0.170	
			Mass, Heavy1	0.160	0.160	0.160	0.184	0.211	0.690	0.690	0.690	0.690	0.690	0.184	0.253	0.211	0.184	0.184	0.160	
			Wood-framed and Other	0.059	0.059	0.059	0.059	0.059	0.059	0.059	0.059	0.059	0.059	0.042	0.059	0.059	0.042	0.042	0.042	
		Floors / Soffits	Raised Mass1	0.045	0.045	0.058	0.058	0.058	0.069	0.092	0.092	0.092	0.069	0.058	0.058	0.058	0.045	0.058	0.037	
			Other	0.034	0.034	0.039	0.039	0.039	0.039	0.071	0.039	0.039	0.039	0.039	0.039	0.039	0.034	0.039	0.034	
	Roofing Products	Low-sloped	Aged Solar Reflectance	NR	NR	NR	NR	NR	NR	NR	NR	0.55	0.55	0.55	NR	0.55	0.55	0.55	NR	
			Thermal Emittance	NR	NR	NR	NR	NR	NR	NR	NR	0.75	0.75	0.75	NR	0.75	0.75	0.75	NR	
		Steep- Sloped	Aged Solar Reflectance	NR	0.20	0.20	0.20	0.20	0.20	0.20	0.20	0.20	0.20	0.20	0.20	0.20	0.20	0.20	NR	
			Thermal Emittance	NR	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0.75	0. 75	0.75	0.75	0.75	0.75	0.75	NR	
	Air Barrier	REQ	REQ	REQ	REQ	REQ	REQ	NR	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	
	Exterior Doors, Maximum U-factor	Non-Swinging	0.50	1.45	1.45	1.45	1.45	1.45	1.45	1.45	1.45	1.45	1.45	1.45	1.45	1.45	1.45	0.50	
		Swinging	0.70	0.70	0.70	0.70	0.70	0.70	0.70	0.70	0.70	0.70	0.70	0.70	0.70	0.70	0.70	0.70	

CONTINUED: TABLE 140.3-C – PRESCRIPTIVE ENVELOPE CRITERIA FOR GUEST ROOMS OF HOTEL/MOTEL BUILDINGS
Envelope	Fenestration		All Climate Zones	
				Fixed Window	Operable Window	Curtainwall/ Storefront	Glazed Doors2	
		Vertical	Area-Weighted Performance Rating	Max U-factor	0.36	0.46	0.41	0.45	
				Max RSHGC	0.25	0.22	0.26	0.23	
			Area-Weighted Performance Rating	Min VT	0.42	0.32	0.46	0.17	
			Maximum WWR%	40%	
		Skylights			Glass, Curb Mounted	Glass, Deck Mounted	Plastic, Curb Mounted	
			Area-Weighted Performance Rating	Max U-factor	0.58	0.46	0.88	
				Max SHGC	0.25	0.25	NR	
			Area-Weighted Performance Rating	Min VT	0.49	0.49	0.64	
			Maximum SRR%	5%	
Notes:
As defined in Section 100.1, light mass walls are walls with a heat capacity of at least 7.0 Btu/ft²-oF and less than 15.0 Btu/ft²-oF. Heavy mass walls are walls with a heat capacity of at least 15.0 Btu/ft²-oF.
Glazed Doors applies to both site-built and to factory-assembled glazed doors.	

TABLE 140.3-D PRESCRIPTIVE ENVELOPE CRITERIA FOR RELOCATABLE PUBLIC SCHOOL BUILDINGS FOR USE IN ALL CLIMATE ZONES
Roofs/ Ceilings	Metal Buildings	Maximum U-factor	0.041	
Roofs/ Ceilings	Non-Metal Buildings	Maximum U-factor	0.034	
Walls	Wood frame buildings	Maximum U-factor	0.042	
Walls	Metal frame buildings	Maximum U-factor	0.057	
Walls	Metal buildings	Maximum U-factor	0.057	
Walls	Mass/7.0≤ HC	Maximum U-factor	0.170	
Walls	All Other Walls	Maximum U-factor	0.059	
Floors and Soffits	Floors and Soffits	Maximum U-factor	0.048	
Roofing Products	Low-Sloped	Aged Solar Reflectance	0.63	
Roofing Products	Low-Sloped	Thermal Emittance	0.75	
Roofing Products	Steep-Sloped	Aged Solar Reflectance	0.25	
Roofing Products	Steep-Sloped	Thermal Emittance	0.80	
Fenestration	Windows	Maximum U-factor	0.47	
Fenestration	Windows	Maximum SHGC	0.26	
Fenestration	Glazed Doors (Site-Built and Factory
Assembled)	Maximum U-factor	0.45	
Fenestration	Glazed Doors (Site-Built and Factory
Assembled)	Maximum SHGC	0.23	
Fenestration	Skylights	Glass with Curb Maximum U-factor	0.99	
Fenestration	Skylights	Glass without Curb Maximum U-factor	0.57	
Fenestration	Skylights	Plastic with Curb Maximum U-factor	0.87	
Fenestration	Skylights	Glass Type 0-2% SRR
Maximum SHGC	0.46	
Fenestration	Skylights	Glass Type 2.1-5% SRR
Maximum SHGC	0.36	
Fenestration	Skylights	Plastic Type 0-2% SRR
Maximum SHGC	0.69	
Fenestration	Skylights	Plastic Type 2.1-5% SRR
Maximum SHGC	0.57	
Exterior Doors	Non-Swinging doors	Maximum U-factor	0.50	
Exterior Doors	Swinging doors	Maximum U-factor	0.70	

Reserved.
Minimum daylighting requirement for large, enclosed spaces. In climate zones 2 through 15, conditioned enclosed spaces, and unconditioned enclosed spaces that are greater than 5,000 square feet and that are directly under a roof with ceiling heights greater than 15 feet, shall meet the following requirements:
A combined total of at least 75 percent of the floor area, as determined in building floor plan (drawings) view, shall be within one or more of the following:
Primary sidelit daylit zone in accordance with Section 130.1(d), or
The total floor area in the space within a horizontal distance of 0.7 times the average ceiling height from the edge of rough opening of skylights.
All skylit daylit zones and primary sidelit daylit zones shall be shown on building plans.
General lighting in daylit zones shall be controlled in accordance with Section 130.1(d).
The total skylight area is at least 3 percent of the total floor area in the space within a horizontal distance of 0.7 times the average ceiling height from the edge of rough opening of skylights; or the product of the total skylight area and the average skylight visible transmittance is no less than 1.5 percent of the total floor area in the space within a horizontal distance of 0.7 times the average ceiling height from the edge of rough opening of skylights.
All skylights shall have a glazing material or diffuser that has a measured haze value greater than 90 percent, tested according to ASTM D1003 (notwithstanding its scope) or other test method approved by the Commission.
Skylights for conditioned and unconditioned spaces shall have an area-weighted average Visible Transmittance (VT) no less than the applicable value required by Section 140.3(a)6D.
Exception 1 to Section 140.3(c): Auditoriums, churches, movie theaters, museums and refrigerated warehouses.
Exception 2 to Section 140.3(c): In buildings with unfinished interiors, future enclosed spaces for which there are plans to have:
A floor area of less than or equal to 5,000 square feet, or
Ceiling heights of less than or equal to 15 feet.
This exception shall not be used for S-1 or S-2 (storage), or for F-1 or F-2 (factory) occupancies.
Exception 3 to Section 140.3(c): Enclosed spaces having a designed general lighting system with a lighting power density less than 0.5 watts per square foot.
Exception 4 to Section 140.3(c): Enclosed spaces where it is documented that permanent architectural features of the building, existing structures or natural objects block direct beam sunlight on at least half of the roof over the enclosed space for more than 1500 daytime hours per year between 8 a.m. and 4 p.m.
Daylighting Design Power Adjustment Factors (PAFs). To qualify for a Power Adjustment Factor (PAF) as specified in Section 140.6(a)2L, daylighting devices shall meet the following requirements:
Clerestory fenestration. To qualify for a PAF, clerestory fenestration shall meet the following requirements:
Shall be installed on east-, west-, or south-facing facades.
Shall have a head height that is at least 10 feet above the finished floor.
Shall have a glazing height that is greater than or equal to 10 percent of the head height.
If operable shading is installed on the clerestory fenestration, then the clerestory fenestration shading shall be controlled separately from shading serving other vertical fenestration.

Interior and exterior horizontal slats. To qualify for a PAF, horizontal slats shall meet the following requirements:
Shall be installed adjacent to vertical fenestration on east- or west-facing facades with Window Wall Ratios between 20 and 30 percent.
Exterior horizontal slats shall be level or sloped downwards from fenestration. Interior horizontal slats shall be level or sloped upwards from fenestration.
Shall have a projection factor as specified in Table 140.3-E. The projection factor is calculated using Equation 140.3-C.
Shall have a minimum distance factor of 0.3. The distance factor is calculated using Equation 140.3-C.
Exception to Section 140.3(d)2D: Where it is documented that existing adjacent structures or natural objects within view of the vertical fenestration block direct sunlight onto the vertical fenestration between 8 a.m. and 5 p.m. for less than 500 daytime hours per year.
Shall have a minimum Visible Reflectance of 0.50 when tested as specified in ASTM E903.
Shall be opaque.
Exception to Section 140.3(d)2F: Horizontal slats with a Visible Transmittance of 0.03 or less when tested as specified in ASTM E1175.
Shall be permanently mounted and not adjustable.
Shall extend the entire height of the vertical fenestration and beyond each side of the window jamb by a distance equal to or greater than their horizontal projection.
Exception to Section 140.3(d)2H: Where the slats are located entirely within the vertical fenestration’s rough opening or a fin is located at the window jambs and extends vertically the entire height of the window jamb and extends horizontally the entire depth of the projection.
Shall be shown on the plans with the dimensions for the slat projection and slat spacing as specified in Equation 140.3-C.
Shall have a conspicuous factory installed label permanently affixed and prominently located on an attachment point of the device to the building envelope, stating the following: “NOTICE: Removal of this device will require re-submittal of compliance documentation to the enforcement agency responsible for compliance with California Title 24, Part 6”.
Interior and Exterior Light Shelves. To qualify for a PAF, light shelves shall meet the following requirements:
Where there is vertical fenestration area below the light shelf, both interior and exterior light shelves shall be installed.
Shall be installed adjacent to clerestory fenestration on south-facing facades with Window Wall Ratios greater than 30 percent. The head height of the light shelves shall be no more than one foot below the finished ceiling. The clerestory fenestration shall meet the requirements of Section 140.3(d)1.
Exterior light shelves shall be level or sloped downwards from fenestration. Interior light shelves shall be level or sloped upwards from fenestration.
Shall have a projection factor of the applicable value as specified in Table 140.3-E. The light shelf projection factor is calculated using Equation 140.3-C.
Shall have a minimum Distance Factor of 0.3. The distance factor is calculated using Equation 140.3-C.
Exception to Section 140.3(d)3E: Where it is documented that existing adjacent structures or natural objects within view of the vertical fenestration block direct sunlight onto the vertical fenestration between 8 a.m. and 5 p.m. for less than 750 daytime hours per year.
Shall have a top surface with a minimum Visible Reflectance of 0.50 when tested as specified in ASTM E903.

Exception to Section 140.3(d)3F: Where an exterior light shelf is installed greater than two feet below the clerestory sill.
Shall extend beyond each side of the window jamb by a distance equal to or greater than their horizontal projection.
Shall be shown on the plans with the dimensions for the light shelf projection and light shelf spacing as specified in Equation 140.3-C.
TABLE 140.3-E Daylighting Devices
Daylighting Device	Orientation of the Vertical Fenestration	Projection Factor	
Horizontal Slats	East or West	2.0 to 3.0	
Interior Light Shelf	South	1.0 to 2.0	
Exterior Light Shelf	South	0.25 to 1.25	

EQUATION 140.3-C PROJECTION AND DISTANCE FACTOR CALCULATION
Projection Factor =	Projection / Spacing	
Distance Factor =	D / (HAS × Projection Factor)	
WHERE:		
Projection =	The horizontal distance between the base edge and the projected edge of the overhang, slat, or light shelf.	
Spacing =	For overhangs, the vertical distance between the projected edge of the overhang and sill of the vertical fenestration below it.
For horizontal slats, the vertical distance between the projected edge of a slat to the base edge of the slat below it.
For interior light shelves, the vertical distance between the projected edge of the light shelf and head of the clerestory fenestration above it.
For exterior light shelves, the vertical distance between the projected edge of the light shelf and sill of the vertical fenestration below it.	
D =	Distance between the existing structure or nature object and the fenestration	
HAS =	Height difference between the top of the existing structure or nature object and the bottom of the fenestration	
NOTE:	The base edge is the edge of an overhang, slat, or light shelf that is adjacent to the vertical fenestration. The projected edge is the opposite
edge from the base edge.	

NOTE: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code.
Reference: Sections 25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and
25943, Public Resources Code.

SECTION 140.4 – PRESCRIPTIVE REQUIREMENTS FOR SPACE CONDITIONING SYSTEMS
A building complies with this section by being designed with and having constructed and installed a space- conditioning system that meets the applicable prescriptive requirements of Subsections (a) through (q).
Sizing, equipment selection and type.
Sizing and equipment selection. Mechanical heating and mechanical cooling equipment serving healthcare facilities shall be sized to meet the design heating and cooling loads as calculated according to

the Subsection (b). Mechanical heating and mechanical cooling equipment serving

> hotel/motel

buildings and nonresidential buildings other than healthcare facilities shall be the smallest size, within the available options of the desired equipment line, necessary to meet the design heating and cooling loads of the building, as calculated according to Subsection (b).
Exception 1 to Section 140.4(a)1: Where it can be demonstrated to the satisfaction of the enforcing agency that oversizing will not increase building TDV energy use.
Exception 2 to Section 140.4(a)1: Standby equipment with controls that allow the standby equipment to operate only when the primary equipment is not operating.
Exception 3 to Section 140.4(a)1: Multiple units of the same equipment type, such as multiple chillers and boilers, having combined capacities exceeding the design load, if they have controls that sequence or otherwise optimally control the operation of each unit based on load.
Single zone space-conditioning system type. Single zone space-conditioning systems with direct expansion cooling with rated cooling capacity 240,000 Btu/hr or less serving the following spaces shall meet the applicable requirements in Items A–H, or shall meet the performance compliance requirements of Section 140.1. All other system types, including systems with rated cooling capacity greater than 240,000 Btu/hr, multi-zone systems and systems using central boilers or chillers, shall comply with the applicable requirements of Section 140.
Retail and grocery building spaces in Climate Zones 2 through 15. The space-conditioning system shall be a heat pump.
Retail and grocery building spaces in Climate Zones 1 and 16 with cooling capacity less than 65,000 Btu/hr. The space-conditioning system shall be an air conditioner with furnace.
Retail and grocery building spaces in Climate Zones 1 and 16 with cooling capacity 65,000 Btu/hr or greater. The space-conditioning system shall be a dual-fuel heat pump.
School building spaces. For Climate Zones 2 through 15, the space-conditioning system shall be a heat pump. For Climate Zones 1 and 16, the space-conditioning system shall be a dual-fuel heat pump.
Office, financial institution and library building spaces in Climate Zones 1 through 15. The space- conditioning system shall be a heat pump.
Office, financial institution and library building spaces in Climate Zone 16 with cooling capacity less than 65,000 Btu/hr. The space-conditioning system shall be an air conditioner with furnace.
Office, financial institution and library building spaces in Climate Zone 16 with cooling capacity 65,000 Btu/hr or greater. The space-conditioning system shall be a dual-fuel heat pump.
Office spaces in warehouses. The space-conditioning system shall be a heat pump in all climate zones.
Exception to Section 140.4(a)2: Systems utilizing recovered heat for space heating.

Calculations. In making equipment sizing calculations under Subsection (a), all of the following rules shall apply:
Heating and cooling loads. Heating and cooling system design loads shall be determined in accordance with the procedures described in Subsection A or B below:
For systems serving hotel/motel buildings, and nonresidential buildings other than healthcare facilities, the method in the 2017 ASHRAE Handbook, Fundamentals shall be used or as specified in a method approved by the Commission.
For system serving healthcare facilities the method in the California Mechanical Code shall be used.
Indoor design conditions. Indoor design temperature and humidity conditions for comfort applications shall be determined in accordance with Subsection A or B below:
For systems serving hotel/motel buildings, and nonresidential buildings other than healthcare facilities, ASHRAE Standard 55 or the 2017 ASHRAE Handbook, Fundamentals Volume, except that winter humidification and summer dehumidification shall not be required.
For systems serving healthcare facilities the method in the California Mechanical Code shall be used.
Outdoor design conditions. Outdoor design conditions shall be selected in accordance with Subsection A or B below:
For systems serving hotel/motel buildings, and nonresidential buildings other than healthcare facilities the design conditions from Reference Joint Appendix JA2 shall be used, which is based on data from the ASHRAE Climatic Data for Region X. Heating design temperatures shall be no lower than the Heating Winter Median of Extremes values. Cooling design temperatures shall be no greater than the 0.5 percent Cooling Dry Bulb and Mean Coincident Wet Bulb values.
For system serving healthcare facilities the method in Section 320.0 of the California Mechanical Code shall be used.
Exception to Section 140.4(b)3: Cooling design temperatures for cooling towers shall be no greater than the
0.5 percent cooling design wet bulb values.
Ventilation. Outdoor air ventilation loads shall be calculated using the ventilation rates required in Section 120.1(c)3.
Envelope. Envelope heating and cooling loads shall be calculated using envelope characteristics, including square footage, thermal conductance, Solar Heat Gain Coefficient or shading coefficient, and air leakage, consistent with the proposed design.
Lighting. Lighting heating and cooling loads shall be based on actual design lighting levels or power densities as specified in Section 140.6.
People. Occupant density shall be based on the expected occupancy of the building and shall be the same as determined under Section 120.1(c)3A, if used. Sensible and latent heat gains shall be as listed in the 2017 ASHRAE Handbook- Fundamentals, Chapter 18.
Process loads. Loads caused by a process shall be based upon actual information on the intended use of the building.
Miscellaneous equipment. Equipment loads other than process loads shall be calculated using design data compiled from one or more of the following sources:
Actual information based on the intended use of the building; or
Published data from manufacturer’s technical publications or from technical societies, such as the ASHRAE Handbook, Applications Volume; or
Other data based on the designer’s experience of expected loads and occupancy patterns.
Internal heat gains. Internal heat gains may be ignored for heating load calculations.

Safety factor. Calculated design loads based on 140.4(b)1 through 10 may be increased by up to 10 percent to account for unexpected loads or changes in space usage.
Other loads. Loads such as warm-up or cool-down shall be calculated from principles based on the thermal capacity of the building and its contents, the degree of setback, and desired recovery time; or may be assumed to be no more than 30 percent for heating and 10 percent for cooling of the steady-state design loads. In addition, the steady-state load may include a safety factor in accordance with Section 140.4(b)11.
Fan systems. Each fan system moving air into, out of or between conditioned spaces or circulating air for the purpose of conditioning air within a space shall meet the requirements of Items 1, 2 and 3 below.
Fan power budget. For each fan system that includes at least one fan or fan array with fan electrical input power ≥ 1 kW, fan system electrical input power (Fan kWdesign,system) determined per Section 140.4(c)1(B) at the fan system design airflow shall not exceed Fan kWbudget as calculated per Section 140.4(c)1(A).
Calculation of fan power budget (Fan kWbudget). For each fan system:
Determine the fan system airflow and choose the appropriate table(s) for fan power allowance.
For single-cabinet fan systems, use the fan system airflow and the power allowances in both Table 140.4-A and Table 140.4-B.
For supply-only fan systems, use the fan system airflow and power allowances in Table 140.4-A.
For relief fan systems, use the design relief airflow and the power allowances in Table 140.4-B.
For exhaust, return and transfer fan systems, use the fan system airflow and the power allowances in Table 140.4-B.
For complex fan systems, separately calculate the fan power allowance for the supply and return/exhaust systems and sum them. For the supply airflow, use supply airflow at the fan system design conditions, and the power allowances in Table 140.4-A. For the return exhaust airflow, use return/exhaust airflow at the fan system design conditions, and the power allowances in Table 140.4-B.
For each fan system determine the components included in the fan system and sum the fan power allowances of those components. All fan systems shall include the system base allowance. If, for a given component, only a portion of the fan system airflow passes through the component, calculate the fan power allowance for that component per Equation 140.4-A:
EQUATION 140.4-A FAN POWER ALLOWANCE
Qcomp
FPAadj =

Where	Q	sys	X FPAcomp	
FPAadj	=		The corrected fan power allowance for the component in w/cfm	
Qcomp	=		The airflow through component in cfm	
Qsys
FPAcomp	=
=		The fan system airflow in cfm
The fan power allowance of the component from Table 140.4A or Table 140.4B	

Multiply the fan system airflow by the sum of the fan power allowances for the fan system.
Divide by 1000 to convert to Fan kWbudget.
For building sites at elevations greater than 3,000 feet, multiply Fan kWbudget by the correction factor in Table 140.4-C.
Determining fan system electrical input power (Fan kWdesign,system). Fan kWdesign,system is the sum of Fan kWdesign for each fan or fan array included in the fan system with Fan kWdesign  1 kW. If variable speed drives are used, their efficiency losses shall be included. Fan input power shall be calculated with two times the clean filter pressure drop, which is the mean of the clean filter pressure drop and design final filter pressure drop. The Fan kWdesign for each fan or fan array shall be determined using one of the following methods. There is no requirement to use the same method for all fans in a fan system:
Use the default Fan kWdesign in Table 140.4-D for one or more of the fans. This method cannot be used for complex fan systems.
Use the Fan kWdesign at fan system design conditions provided by the manufacturer of the fan, fan array, or equipment that includes the fan or fan array calculated per a test procedure included in USDOE 10 CFR Part 430, USDOE 10 CFR Part 431, ANSI/AMCA Standard 208-2018, ANSI/AMCA
Standard 210-2016, AHRI Standard 430-2020, AHRI Standard 440-2019 or ISO 5801-2017.
Use the Fan kWdesign provided by the manufacturer, calculated at fan system design conditions per one of the methods listed in Section 5.3 of ANSI/AMCA 208-2018.
Determine the Fan kWdesign by using the maximum electrical input power provided on the motor nameplate.

Table 140.4-A: Supply Fan Power Allowances (watts/ cfm)
Airflow	Multi-Zone VAV Systems
≤5,000 cfm1	Multi-Zone VAV Systems >5,000 and
≤10,000 cfm1	Multi-Zone VAV Systems >10,000 cfm1	All Other Fan Systems ≤5,000 cfm	All Other Fan Systems >5,000 and
≤10,000 cfm	All Other Fan Systems
>10,000 cfm	
Supply System Base Allowance for AHU serving spaces ≤ 6
floors away).	0.395	0.453	0.413	0.232	0.256	0.236	
Supply system base allowance for AHU serving spaces > 6
floors away	0.508	0.548	0.501	0.349	0.356	0.325	
MERV 13 to MERV 16
Filter upstream of thermal conditioning equipment (two times the clean filter pressure
drop)2	0.136	0.114	0.105	0.139	0.120	0.107	
MERV 13 to MERV 16
Final filter downstream of thermal conditioning equipment. ( two times the clean filter pressure
drop)2	0.225	0.188	0.176	0.231	0.197	0.177	
Filtration allowance for
> MERV 16 or HEPA
Filter ( two times the clean filter pressure
drop) 2	0.335	0.280	0.265	0.342	0.292	0.264	
Central Hydronic heating coil allowance	0.046	0.048	0.052	0.046	0.050	0.054	
Electric heat allowance	0.046	0.038	0.035	0.046	0.040	0.036	

Gas heat allowance	0.069	0.057	0.070	0.058	0.060	0.072	
Hydronic/DX cooling coil or heat pump coil (wet) allowance3	0.135	0.114	0.105	0.139	0.120	0.107	
Solid or liquid Desiccant system
allowance	0.157	0.132	0.123	0.163	0.139	0.124	
Reheat Coil for Dehumidification Allowance	0.045	0.038	0.035	0.046	0.040	0.036	
Allowance for Evaporative humidifier/cooler in series with a cooling coil. Value shown is allowed watts/cfm per
1.0 Inches of water gauge (in.w.g.) Determine pressure loss (in.w.g.) at 400 fpm or maximum velocity allowed by the manufacturer, whichever is less.
[Calculation required, see note 4]	

0.224	

0.188	

0.176	

0.231	

0.197	

0.177	
Allowance for 100% Outdoor air system5.	
0.000	
0.000	
0.000	0.070	0.100	0.107	
Energy recovery allowance for 0.50 ≤ ERR <0.55 6	0.135	0.114	0.105	0.139	0.120	0.107	
Energy recovery
allowance for 0.55 ≤
ERR <0.60 6	0.160	0.134	0.124	0.165	0.141	0.126	

Energy recovery
allowance for 0.60 ≤
ERR <0.65 6	0.184	0.155	0.144	0.190	0.163	0.146	
Energy recovery allowance for 0.65 ≤ ERR <0.70 6	0.208	0.175	0.163	0.215	0.184	0.165	
Energy recovery allowance for 0.70 ≤ ERR <0.75 6	0.232	0.196	0.183	0.240	0.205	0.184	
Energy recovery
allowance for 0.75 ≤
ERR <0.80 6	0.257	0.216	0.202	0.264	0.226	0.203	
Energy recovery
allowance for ERR ≥
0.80 6	0.281	0.236	0.222	0.289	0.247	0.222	
Coil Runaround Loop	0.135	0.114	0.105	0.139	0.120	0.107	
Allowance for Gas phase filtration. Value shown is allowed w/cfm per 1.0 in. wg air pressure drop. [Calculation required,
see note 4]	0.224	0.188	0.176	0.231	0.197	0.177	
Economizer Return Damper	0.045	0.038	0.035	0.046	0.040	0.036	
Air blender allowance	0.045	0.038	0.035	0.046	0.040	0.036	
Sound attenuation section [fans serving spaces with design background noise goals
below NC35]	0.034	0.029	0.026	0.035	0.030	0.027	

Deduction for systems that feed a terminal unit with a fan with electrical input power <
1kW	-0.100	-0.100	-0.100	-0.100	-0.100	-0.100	
Low-turndown single- zone VAV fan systems meeting the
requirements in note 7.	0.000	0.000	0.000	0.070	0.100	0.089	
Footnotes to Table 140.4-A
See Section 100.1 for the definition of FAN SYSTEM, MULTI-ZONE VARIABLE AIR VOLUME (VAV) .
Filter fan power allowance can only be counted once per fan system, except fan systems in healthcare facilities, which can claim one of the MERV 13 to 16 filter allowances and the HEPA filter allowance if both are included in the fan system.
Healthcare facilities can claim this fan power allowance twice per fan system where coil design leaving air temperature is less than 44 ⁰F.
Power allowance requires further calculation by multiplying the actual inches of water gauge (in.w.g.) of the device/ component by the watts/ cfm in Table 140.4-A.
The 100% outdoor air system must serve 3 or more HVAC zones and airflow during non-economizer operating periods must not exceed 135% of minimum requirements in Section 120.1(c)(3).
Enthalpy Recovery Ratio (ERR) calculated per ANSI/ASHRAE 84-2020.
A low-turndown single-zone VAV fan system must be capable of and configured to reduce airflow to 50 percent of design airflow and use no more than 30 percent of the design wattage at that airflow. No more than 10 percent of the design load served by the equipment shall have fixed loads.

TABLE 140.4-B: EXHAUST, RETURN, RELIEF, TRANSFER FAN POWER ALLOWANCES (WATTS/ CFM)

Airflow	Multi-Zone VAV Systems1
≤5,000 cfm	Multi-Zone VAV Systems1 >5,000 and ≤10,000 cfm	Multi-Zone VAV Systems1 >10,000 cfm	All Other Fan Systems ≤5,000 cfm	All Other Fan Systems >5,000 and ≤10,000 cfm	All Other Fan Systems >10,000 cfm	
Exhaust System Base Allowance	0.221	0.246	0.236	0.186	0.184	0.190	
Filter (any MERV value)2	0.046	0.041	0.036	0.046	0.041	0.035	
Energy Recovery Allowance For
0.50 ≤ ERR <0.55 3	0.139	0.120	0.107	0.139	0.123	0.109	
Energy Recovery Allowance For
0.55 ≤ ERR <0.60 3	0.165	0.142	0.126	0.165	0.144	0.128	
Energy Recovery Allowance For
0.60 ≤ ERR <0.65 3	0.190	0.163	0.146	0.191	0.166	0.148	
Energy Recovery Allowance For
0.65 ≤ ERR <0.70 3	0.215	0.184	0.165	0.216	0.188	0.167	
Energy Recovery Allowance For
0.70 ≤ ERR <0.75 3	0.240	0.206	0.184	0.241	0.209	0.186	
Energy Recovery Allowance For
0.75 ≤ ERR <0.80 3	0.265	0.227	0.203	0.266	0.231	0.205	
Energy Recovery Allowance For
ERR ≥ 0.80 3	0.289	0.248	0.222	0.291	0.252	0.225	
Coil Runaround Loop	0.139	0.120	0.107	0.139	0.123	0.109	
Return or exhaust systems required by code or accreditation standards to be fully ducted, or systems required to maintain air pressure differentials between
adjacent rooms	0.116	0.100	0.089	0.116	0.102	0.091	
Return and/or exhaust airflow control devices required for space
pressurization control	0.116	0.100	0.089	0.116	0.102	0.091	

Laboratory and vivarium exhaust systems in high-rise buildings for vertical duct exceeding 75 ft.
Value shown is allowed w/cfm per
0.25 in. wg for each 100 feet exceeding 75 feet. [Calculation required, see note 4]	0.058	0.051	0.045	0.058	0.052	0.046	
Biosafety cabinet. Value shown is allowed w/cfm per 1.0 in. wg air pressure drop. [Calculation required, see note 4]	0.231	0.198	0.177	0.232	0.202	0.179	
Exhaust filters, scrubbers, or other exhaust treatment required by code or standard. Value shown is allowed w/cfm per 1.0 in. wg air pressure drop. [Calculation
required, see note 4]	0.231	0.198	0.177	0.232	0.202	0.179	
Healthcare facility allowance5	0.231	0.198	0.177	0.232	0.202	0.179	
Sound attenuation section [Fans serving spaces with design background noise goals below
NC35.]	0.035	0.030	0.027	0.035	0.031	0.028	
Footnotes to Table 140.4-B
See FAN SYSTEM, MULTI-ZONE VARIABLE AIR VOLUME (VAV) in definitions for Multizone to be classified as a Multi-Zone VAV System.
Filter pressure loss can only be counted once per fan system.
Enthalpy Recovery Ratio (ERR) calculated per ANSI/ASHRAE 84-2020.
Power allowance requires further calculation, multiplying the actual pressure drop (in. wg.) of the device/ component by the watts/cfm in the Table 140.4-B.
This allowance can only be taken for healthcare facilities.

TABLE 140.4-C: AIR DENSITY CORRECTION FACTORS

Altitude (ft)	Correction Factor	
<3,000	1.000	
≥3,000 and <4,000	0.896	
≥4,000 and <5,000	0.864	
≥5,000 and <6,000	0.832	
≥6,000	0.801	

TABLE 140.4-D: DEFAULT VALUES FOR FAN KWDESIGN BASED ON MOTOR NAMEPLATE HP

Motor Nameplate HP	Default Fan kWdesign with variable speed drive (Fan kWdesign)	Default Fan kWdesign without variable speed drive(Fan kWdesign)	
<1	0.96	0.89	
≥1 and <1.5	1.38	1.29	
≥1.5 and <2	1.84	1.72	
≥2 and <3	2.73	2.57	
≥3 and <5	4.38	4.17	
≥5 and <7.5	6.43	6.15	
≥7.5 and <10	8.46	8.13	
≥10 and <15	12.47	12.03	
≥15 and <20	16.55	16.04	
≥20 and <25	20.58	19.92	
≥25 and <30	24.59	23.77	
≥30 and <40	32.74	31.70	
≥40 and <50	40.71	39.46	
≥50 and <60	48.50	47.10	
≥60 and <75	60.45	58.87	
≥75 and ≤100	80.40	78.17	
Footnotes to TABLE 140.4-D:
This table cannot be used for Motor Nameplate Horsepower values greater than 100.
This table is to be used only with motors with a service factor ≤1.15. If the service factor is not provided, this table may not be used.

Variable air volume (VAV) systems.
Static pressure sensor location. Static pressure sensors used to control variable air volume fans shall be placed in a position such that the controller set point is no greater than one-third the total design fan static pressure, except for systems with zone reset control complying with Section 140.4(c)2B. If this results in the sensor being located downstream of any major duct split, multiple sensors shall be installed in each major branch with fan capacity controlled to satisfy the sensor furthest below its setpoint; and
Setpoint reset. For systems with direct digital control of individual zone boxes reporting to the central control panel, static pressure setpoints shall be reset based on the zone requiring the most pressure; i.e., the setpoint is reset lower until one zone damper is nearly wide open.
Fractional HVAC motors for fans. HVAC motors for fans that are less than 1 hp and 1/12 hp or greater shall be electronically-commutated motors or shall have a minimum motor efficiency of 70 percent when

rated in accordance with NEMA Standard MG 1-2006 at full load rating conditions. These motors shall also have the means to adjust motor speed for either balancing or remote control. Belt-driven fans may use sheave adjustments for airflow balancing in lieu of a varying motor speed.
Exception 1 to Section 140.4(c)3: Motors in fan-coils and terminal units that operate only when providing heating to the space served.
Exception 2 to Section 140.4(c)3: Motors in space conditioning equipment certified under Section 110.1 or 110.2.
Exception to Section 140.4(c): Fan system power caused solely by process loads.
Space-conditioning zone controls. Each space-conditioning zone shall have controls designed in accordance with 1 or 2:
Each space-conditioning zone shall have controls that prevent:
Reheating; and
Recooling; and
Simultaneous provisions of heating and cooling to the same zone, such as mixing or simultaneous supply of air that has been previously mechanically heated and air that has been previously cooled, either by cooling equipment or by economizer systems; or
Zones served by variable air-volume systems that are designed and controlled to reduce, to a minimum, the volume of reheated, recooled, or mixed air are allowed only if the controls meet all of the following requirements:
For each zone with direct digital controls (DDC):
The volume of primary air that is reheated, recooled or mixed air supply shall not exceed the larger of:
50 percent of the peak primary airflow; or
The design zone outdoor airflow rate as specified by Section 120.1(c)3.
The volume of primary air in the deadband shall not exceed the design zone outdoor airflow rate as specified by Section 120.1(c)3.
The first stage of heating consists of modulating the zone supply air temperature setpoint up to a maximum setpoint no higher than 95ºF while the airflow is maintained at the dead band flow rate.
The second stage of heating consists of modulating the airflow rate from the dead band flow rate up to the heating maximum flow rate.
For each zone without DDC, the volume of primary air that is reheated, re-cooled, or mixed air supply shall not exceed the larger of the following:
30 percent of the peak primary airflow; or
The design zone outdoor airflow rate as specified by Section 120.1(c)3.
Exception 1 to Section 140.4(d): Zones with special pressurization relationships or cross-contamination control needs.
Exception 2 to Section 140.4(d): Zones served by space-conditioning systems in which at least 75 percent of the energy for reheating, or providing warm air in mixing systems, is provided from a site-recovered or site- solar energy source.
Exception 3 to Section 140.4(d): Zones in which specific humidity levels are required to satisfy exempt process loads. Computer rooms or other spaces where the only process load is from IT equipment may not use this exception.

Exception 4 to Section 140.4(d): Zones with a peak supply-air quantity of 300 cfm or less.
Exception 5 to Section 140.4(d): Systems serving healthcare facilities.
Economizers.
Each cooling air handler that has a design total mechanical cooling capacity over 33,000 Btu/hr or chilled- water cooling systems without a fan or that use induced airflow that has a cooling capacity greater than the systems listed in Table 140.4-C, shall include either:
An air economizer capable of modulating outside-air and return-air dampers to supply 100 percent of the design supply air quantity as outside air; or
A water economizer capable of providing 100 percent of the expected system cooling load at outside air temperatures of 50°F dry-bulb and 45°F wet-bulb and below.
Exception 1 to Section 140.4(e)1: Where special outside air filtration and treatment, for the reduction and treatment of unusual outdoor contaminants, makes compliance infeasible.
Exception 2 to Section 140.4(e)1: Where the use of outdoor air for cooling will affect other systems, such as humidification, dehumidification or supermarket refrigeration systems, so as to increase overall building TDV energy use.
Exception 3 to Section 140.4(e)1: Systems serving hotel/motel guestrooms.
Exception 4 to Section 140.4(e)1: Where comfort cooling systems have the cooling efficiency that meets or exceeds the cooling efficiency improvement requirements in Table 140.4-F.
Exception 5 to Section 140.4(e)1: Fan systems primarily serving computer rooms. See Section 140.9(a) for computer room economizer requirements.
Exception 6 to Section 140.4(e)1: In all climate zones, each air handler that has a design total mechanical cooling capacity less than 54,000 Btu/hr where ventilation is provided by a dedicated outdoor air system (DOAS) with exhaust air heat recovery in accordance with Section 140.4(p) and the following:
The DOAS unit shall meet the exhaust air heat recovery ratio as specified in Section 140.4(q)1 and include bypass or control to disable energy recovery as specified in Section 140.4(q)2.
The DOAS unit shall provide at least the minimum ventilation air flow rate as specified in Section 120.1(c)3 and provide no less than 0.3 cfm/ft2 during economizer conditions.
Exception 7 to Section 140.4(e)1: Where the use of an air economizer in controlled environment horticulture spaces will affect carbon dioxide enrichment systems.

TABLE 140.4-ECHILLED WATER SYSTEM COOLING CAPACITY
Climate Zones	Total Building Chilled Water System Capacity, Minus Capacity of the Cooling units with Air Economizers	
	Building Water-Cooled Chilled Water System	Air-Cooled Chilled Water Systems or District Chilled Water Systems	
15	≥ 960,000 Btu/h (280 kW)	≥ 1,250,000 Btu/h (365 kW)	
1-14	≥720,000 Btu/h (210 kW)	≥940,000 Btu/h (275 kW)	
16	≥1,320,000 Btu/h (385 kW)	≥1,720,000 Bu/h (505 kW)	

TABLE 140.4-FECONOMIZER TRADE-OFF TABLE FOR COOLING SYSTEMS
Climate Zone	Efficiency Improvement a	a If a unit is rated with an annualized or part-load metric, then to eliminate the required economizer, only the applicable minimum cooling efficiency of the unit must be increased by the percentage shown. If the unit is only rated with a full load metric, like EER or COP cooling, then that metric must be increased by the percentage shown. To determine the efficiency required to eliminate the economizer, when the unit equipment efficiency is rated with an energy-input divided by work- output metric, the metric shall first be converted to COP prior to multiplying by the efficiency improvement percentage and then converted back to the rated metric.	
1	70%		
2	65%		
3	65%		
4	65%		
5	70%		
6	30%		
7	30%		
8	30%		
9	30%		
10	30%		
11	30%		
12	30%		
13	30%		
14	30%		
15	30%		
16	70%		

If an economizer is required by Section 140.4(e)1, and an air economizer is used to meet the requirement, then it shall be:
Designed and equipped with controls so that economizer operation does not increase the building heating energy use during normal operation; and
Exception to Section 140.4(e)2A: Systems that provide 75 percent of the annual energy used for mechanical heating from site-recovered energy or a site-solar energy source.
Capable of providing partial cooling even when additional mechanical cooling is required to meet the remainder of the cooling load.
Designed and equipped with a device type and high limit shut off complying with Table 140.4-G.

TABLE 140.4-G AIR ECONOMIZER HIGH LIMIT SHUT OFF CONTROL REQUIREMENTS
Device Typea	Climate Zones	Required High Limit (Economizer Off When):	
		Equationb	Description	
Fixed Dry Bulb	1, 3, 5, 11-16	TOA > 75°F	Outdoor air temperature exceeds 75°F	
	2, 4, 10	TOA > 73°F	Outdoor air temperature exceeds 73°F	
	6, 8, 9	TOA > 71°F	Outdoor air temperature exceeds 71°F	
	7	TOA > 69°F	Outdoor air temperature exceeds 69°F	
Differential Dry Bulb	1, 3, 5, 11-16	TOA > TRA°F	Outdoor air temperature exceeds return air temperature	
	2, 4, 10	TOA > TRA-2°F	Outdoor air temperature exceeds return air temperature minus 2°F	
	6, 8, 9	TOA > TRA-4°F	Outdoor air temperature exceeds return air temperature minus 4°F	
	7	TOA > TRA-6°F	Outdoor air temperature exceeds return air temperature minus 6°F	
Fixed Enthalpyc + Fixed Drybulb	All	hOA > 28 Btu/lbc or TOA > 75°F	Outdoor air enthalpy exceeds 28 Btu/lb of dry airc or
Outdoor air temperature exceeds 75°F	
a Only the high limit control devices listed are allowed to be used and at the setpoints listed. Others such as Dew Point, Fixed Enthalpy, Electronic Enthalpy, and Differential Enthalpy Controls, may not be used in any Climate Zone for compliance with Section 140.4(e)1 unless approval for use is provided by the Energy Commission Executive Director.
b Devices with selectable (rather than adjustable) setpoints shall be capable of being set to within 2°F and 2 Btu/lb of the setpoint listed.
c At altitudes substantially different than sea level, the Fixed Enthalpy limit value shall be set to the enthalpy value at 75°F and 50% relative humidity. As an example, at approximately 6,000 foot elevation,
the fixed enthalpy limit is approximately 30.7 Btu/lb.	
The air economizer and all air dampers shall have the following features:
Warranty. 5-year manufacturer warranty of economizer assembly.
Damper reliability testing. Suppliers of economizers shall certify that the economizer assembly, including but not limited to outdoor air damper, return air damper, drive linkage and actuator, have been tested and are able to open and close against the rated airflow and pressure of the system for 60,000 damper opening and closing cycles.
Damper leakage. Economizer outdoor air and return air dampers shall have a maximum leakage rate of 10 cfm/sf at 250 Pascals (1.0 in. of water) when tested in accordance with AMCA Standard 500-D. The economizer outside air and return air damper leakage rates shall be certified to the Energy Commission in accordance with Section 110.0.
Adjustable setpoint. If the high-limit control is fixed dry bulb or fixed enthalpy + fixed dry bulb, then the control shall have an adjustable setpoint.
Sensor accuracy. Outdoor air, return air, mixed air, and supply air sensors shall be calibrated within the following accuracies.
Drybulb and wetbulb temperatures accurate to ±2°F over the range of 40°F to 80°F;
Enthalpy accurate to ±3 Btu/lb over the range of 20 Btu/lb to 36 Btu/lb;
Relative humidity (RH) accurate to ±5 percent over the range of 20 percent to 80 percent RH;
Sensor calibration data. Data used for control of the economizer shall be plotted on a sensor performance curve.

Sensor high limit control. Sensors used for the high limit control shall be located to prevent false readings, including but not limited to being properly shielded from direct sunlight.
Relief air system. Relief air systems shall be capable of providing 100 percent outside air without over-pressurizing the building.
The space-conditioning system shall include the following:
Unit controls shall have mechanical capacity controls interlocked with economizer controls such that the economizer is at 100 percent open position when mechanical cooling is on and does not begin to close until the leaving air temperature is less than 45°F.
Direct Expansion (DX) units greater than 65,000 Btu/hr that control the capacity of the mechanical cooling directly based on occupied space temperature shall have a minimum of two stages of mechanical cooling capacity.
DX units not within the scope of Section 140.4(e)2Eii shall comply with the requirements in Table 140.4-H, and have controls that do not false load the mechanical cooling system by limiting or disabling the economizer or by any other means except at the lowest stage of mechanical cooling capacity.
TABLE 140.4-H DIRECT EXPANSION (DX) UNIT REQUIREMENTS FOR COOLING STAGES AND COMPRESSOR DISPLACEMENT
COOLING CAPACITY	MINIMUM NUMBER OF MECHANICAL COOLING STAGES	MINIMUM COMPRESSOR DISPLACEMENT	
≥ 65,000 Btu/h and
< 240,000 Btu/h	3 stages	≤ 35% full load	
≥ 240,000 Btu/h	4 stages	≤ 25% full load	
Systems that include a water economizer to meet Section 140.4(e)1 shall include the following:
Maximum pressure drop. Precooling coils and water-to-water heat exchangers used as part of a water economizer shall either have a waterside pressure drop of less than 15 feet of water, or a secondary loop shall be installed so that the coil or heat exchanger pressure drop is not contributing to pressure drop when the system is in the normal cooling (non-economizer) mode.
Economizer systems shall be integrated with the mechanical cooling system so that they are capable of providing partial cooling even when additional mechanical cooling is required to meet the remainder of the cooling load. Controls shall not false load the mechanical cooling system by limiting or disabling the economizer or by any other means, such as hot gas bypass, except at the lowest stage of mechanical cooling.
Supply air temperature reset controls. Space-conditioning systems supplying heated or cooled air to multiple zones shall include controls that automatically reset supply air temperatures. Air distribution systems serving zones that are likely to have constant loads shall be designed for the air flows resulting from the fully reset supply air temperature. Supply air temperature reset controls shall be:
In response to representative building loads or to outdoor air temperature; and
At least 25 percent of the difference between the design supply-air temperature and the design room air temperature.
Exception 1 to Section 140.4(f): Systems that meet the requirements of Section 140.4(d)1, without using Exception 1 to that section.
Exception 2 to Section 140.4(f): Where supply-air temperature reset would increase overall building energy use.

Exception 3 to Section 140.4(f): Systems supplying zones in which specific humidity levels are required to satisfy process loads. Computer rooms or other spaces with only IT equipment may not use this exception.
Exception 4 to Section 140.4(f): Systems serving healthcare facilities.
Electric resistance heating. Electric resistance heating systems shall not be used for space heating.
Exception 1 to Section 140.4(g): Where an electric resistance heating system supplements a heating system in which at least 60 percent of the annual energy requirement is supplied by site-solar or recovered energy.
Exception 2 to Section 140.4(g): Where an electric resistance heating system supplements a heat pump heating system, and the heating capacity of the heat pump is more than 75 percent of the design heating load calculated in accordance with Section 140.4(a) at the design outdoor temperature specified in Section 140.4(b)4.
Exception 3 to Section 140.4(g): Where the total capacity of all electric resistance heating systems serving the entire building is less than 10 percent of the total design output capacity of all heating equipment serving the entire building.
Exception 4 to Section 140.4(g): Where the total capacity of all electric resistance heating systems serving the entire building, excluding those allowed under Exception 2, is no more than 3 kW.
Exception 5 to Section 140.4(g): Where an electric resistance heating system serves an entire building that is not a hotel/motel building; and has a conditioned floor area no greater than 5,000 square feet; and has no mechanical cooling; and is in an area where natural gas is not currently available.
Exception 6 to Section 140.4(g): Heating systems serving as emergency backup to gas heating equipment.
Heat rejection systems. Heat rejection equipment used in comfort cooling systems, such as air-cooled condensers, open cooling towers, closed-circuit cooling towers and evaporative condensers shall include the following:
Fan speed control. Each fan powered by a motor of 7.5 hp (5.6 kW) or larger shall have the capability to operate that fan at two thirds of full speed or less, and shall have controls that automatically change the fan speed to control the leaving fluid temperature or condensing temperature or pressure of the heat rejection device.
Exception 1 to Section 140.4(h)1: Heat rejection devices included as an integral part of the equipment listed in Tables 110.2-A through 110.2-N.
Exception 2 to Section 140.4(h)1: Condenser fans serving multiple refrigerant circuits.
Exception 3 to Section 140.4(h)1: Condenser fans serving flooded condensers.
Exception 4 to Section 140.4(h)1: Up to one third of the fans on a condenser or tower with multiple fans where the lead fans comply with the speed control requirement.
Tower flow turndown. Open cooling towers configured with multiple condenser water pumps shall be designed so that all cells can be run in parallel with the larger of:
The flow that is produced by the smallest pump, or
50 percent of the design flow for the cell.
Limitation on centrifugal fan cooling towers. Open cooling towers with a combined rated capacity of 900 gpm and greater at 95°F condenser water return, 85°F condenser water supply and 75°F outdoor wet-bulb temperature shall use propeller fans and shall not use centrifugal fans.
Exception 1 to Section 140.4(h)3: Cooling towers that are ducted (inlet or discharge) or have an external sound trap that requires external static pressure capability.
Exception 2 to Section 140.4(h)3: Cooling towers that meet the energy efficiency requirement for propeller fan towers in Section 110.2, Table 110.2-F.

Multiple cell heat rejection equipment. Multiple cell heat rejection equipment with variable speed fan drives shall:
Operate the maximum number of fans allowed that comply with the manufacturer’s requirements for all system components, and
Control all operating fans to the same speed. Minimum fan speed shall comply with the minimum allowable speed of the fan drive as specified by the manufacturer’s recommendation. Staging of fans is allowed once the fans are at their minimum operating speed.
Cooling tower efficiency. Axial fan, open-circuit cooling towers serving condenser water loops for chilled water plants with a total of 900 gpm or greater, shall have a rated efficiency of no less than 60 gpm/hp when rated in accordance with the conditions as listed in Table 110.2-F.
Exception 1 to Section 140.4(h)5: Replacement of existing cooling towers that are inside an existing building or on an existing roof.
Exception 2 to Section 140.4(h)5: Cooling towers serving buildings in Climate Zone 1 or 16.
Minimum chiller efficiency. Chillers shall meet or exceed Path B from Table 110.2-D.
Exception 1 to Section 140.4(i): Chillers with electrical service > 600V.
Exception 2 to Section 140.4(i): Chillers attached to a heat recovery system with a design heat recovery capacity > 40 percent of the design chiller cooling capacity.
Exception 3 to Section 140.4(i): Chillers used to charge thermal energy storage systems where the charging temperature is < 40°F.
Exception 4 to Section 140.4(i): In buildings with more than three chillers, only three chillers are required to meet the Path B efficiencies.
Limitation of air-cooled chillers. Chilled water plants shall not have more than 300 tons provided by air-cooled chillers.
Exception 1 to Section 140.4(j): Where the water quality at the building site fails to meet manufacturer’s specifications for the use of water-cooled chillers.
Exception 2 to Section 140.4(j): Chillers that are used to charge a thermal energy storage system with a design temperature of less than 40°F (4°C).
Exception 3 to Section 140.4(j): Systems serving healthcare facilities.
Hydronic system measures.
Hydronic variable flow systems. HVAC chilled and hot water pumping shall be designed for variable fluid flow and shall be capable of reducing pump flow rates to no more than the larger of: a) 50 percent or less of the design flow rate; or b) the minimum flow required by the equipment manufacturer for the proper operation of equipment served by the system.
Exception 1 to Section 140.4(k)1: Systems that include no more than three control valves.
Exception 2 to Section 140.4(k)1: Systems having a total pump system power less than or equal to 1.5 hp.
Chiller isolation. When a chilled water system includes more than one chiller, provisions shall be made so that flow through any chiller is automatically shut off when that chiller is shut off while still maintaining flow through other operating chiller(s). Chillers that are piped in series for the purpose of increased temperature differential shall be considered as one chiller.
Boiler isolation. When a hot water plant includes more than one boiler, provisions shall be made so that flow through any boiler is automatically shut off when that boiler is shut off while still maintaining flow through other operating boiler(s).

Chilled and hot water temperature reset controls. Systems with a design capacity exceeding 500,000 Btu/hr supplying chilled or heated water shall include controls that automatically reset supply water temperatures as a function of representative building loads or outside air temperature.
Exception 1 to Section 140.4(k)4: Hydronic systems that use variable flow to reduce pumping energy in accordance with 140.4(k)1.
Exception 2 to Section 140.4(k)4: Systems serving healthcare facilities.
Water-cooled air conditioner and hydronic heat pump systems. Water circulation systems serving water- cooled air conditioners, hydronic heat pumps, or both that have total pump system power exceeding 5 hp shall have flow controls that meet the requirements of Section 140.4(k)6. Each such air conditioner or heat pump shall have a two-position automatic valve interlocked to shut off water flow when the compressor is off.
Variable flow controls.
Variable speed drives. Individual pumps serving variable flow systems and having a motor horsepower exceeding 5 hp shall have controls or devices (such as variable speed control) that will result in pump motor demand of no more than 30 percent of design wattage at 50 percent of design water flow. The pumps shall be controlled as a function of required differential pressure.
Pressure sensor location and setpoint.
For systems without direct digital control of individual coils reporting to the central control panel, differential pressure shall be measured at the most remote heat exchanger or the heat exchanger requiring the greatest differential pressure.
For systems with direct digital control of individual coils with a central control panel, the static pressure setpoint shall be reset based on the valve requiring the most pressure, and the setpoint shall be no less than 80 percent open. Pressure sensors may be mounted anywhere.
Exception 1 to Section 140.4(k)6: Heating hot water systems.
Exception 2 to Section 140.4(k)6: Condenser water systems serving only water-cooled chillers.
Hydronic heat pump (WLHP) controls. Hydronic heat pumps connected to a common heat pump water loop with central devices for heat rejection and heat addition shall have controls that are capable of providing a heat pump water supply temperature dead band of at least 20°F between initiation of heat rejection and heat addition by the central devices.
Exception to Section 140.4(k)7: Where a system loop temperature optimization controller is used to determine the most efficient operating temperature based on real-time conditions of demand and capacity, dead bands of less than 20°F shall be allowed.
High capacity space heating gas boiler systems. In Climate Zones 1 through 6, 9 through 14, and 16, gas hot water boiler systems for space heating with a total system input of at least 1 MMBtu/h but no more than 10 MMBtu/h shall meet all of the following requirements.
Boiler system efficiency. Gas hot water boilers shall have a minimum thermal efficiency of 90 percent. Systems with multiple boilers can meet this requirement if the space-heating input provided by equipment with thermal efficiencies above and below 90 percent has an input capacity-weighted average thermal efficiency of at least 90 percent. For boilers federally regulated by combustion efficiency, the calculation for the input capacity-weighted average thermal efficiency shall use the combustion efficiency value.
Hot water distribution design. The hot water distribution system shall be designed to comply with Items i and ii.
Coils and other heat exchangers shall be selected so that at design conditions the hot water return temperature entering the boilers is 120°F or less.

Under all operating conditions, the water temperature entering the boiler is 120°F or less or the flow rate of supply hot water that recirculates directly into the return system, such as by three-way valves or minimum flow bypass controls, shall be no greater than 20 percent of the design flow of the operating boilers.
Exception 1 to Section 140.4(k)8: Where 25 percent of the annual space heating requirement is provided by on-site renewable energy, site-recovered energy or heat recovery chillers.
Exception 2 to Section 140.4(k)8: Space heating boilers installed in individual dwelling units.
Exception 3 to Section 140.4(k)8: Where 50 percent or more of the design heating load is served using perimeter convective heating, radiant ceiling panels or both.
Exception 4 to Section 140.4(k)8: Individual gas boilers with input capacity less than 300,000 Btu/h shall not be included in the calculations of the total system input or total system efficiency.
Reserved.
Fan control. Each cooling system listed in Table 140.4-I shall be designed to vary the indoor fan airflow as a function of load and shall comply with the following requirements:
DX and chilled water cooling systems that control the capacity of the mechanical cooling directly based on occupied space temperature shall (i) have a minimum of two stages of fan control with no more than 66 percent speed when operating on stage 1; and (ii) draw no more than 40 percent of the fan power at full fan speed, when operating at 66 percent speed.
All other systems, including but not limited to DX cooling systems and chilled water systems that control the space temperature by modulating the airflow to the space, shall have proportional fan control such that at 50 percent air flow the power draw is no more than 30 percent of the fan power at full fan speed.
Systems that include an air side economizer to meet Section 140.4(e)1 shall have a minimum of two speeds of fan control during economizer operation.
Exception 1 to Section 140.4(m): Modulating fan control is not required for chilled water systems with all fan motors < 1 HP, or for evaporative systems with all fan motors < 1 HP, if the systems are not used to provide ventilation air and all indoor fans cycle with the load.
Exception 2 to Section 140.4(m): Systems serving healthcare facilities.

TABLE 140.4-I FAN CONTROL SYSTEMS

Cooling System Type	Fan Motor Size	Cooling Capacity	
DX Cooling	Any	≥ 65,000 Btu/hr	
Chilled Water and Evaporative	≥ 1/4 HP	Any	

Mechanical system shut-off. Any directly conditioned space with operable wall or roof openings to the outdoors shall be provided with interlock controls that disable or reset the temperature setpoint to 55°F for mechanical heating and disable or reset the temperature setpoint to 90°F for mechanical cooling to that space when any such opening is open for more than 5 minutes.
Exception 1 to Section 140.4(n): Interlocks are not required on doors with automatic closing devices.
Exception 2 to Section 140.4(n): Any space without a thermostatic control (thermostat or a space temperature sensor used to control heating or cooling to the space).
Exception 3 to Section 140.4(n): Healthcare facilities.

Exhaust system transfer air. Conditioned supply air delivered to any space with mechanical exhaust shall not exceed the greater of:
The supply flow required to meet the space heating or cooling load; or
The ventilation rate required by the authority having jurisdiction, the facility Environmental Health and Safety Department, or by Section 120.1(c)3; or
The mechanical exhaust flow minus the available transfer air. Available transfer air shall be from another conditioned space or return air plenums on the same floor and same smoke or fire compartment, and that at their closest point are within 15 feet of each other.
Exception 1 to Section 140.4(o): Biosafety level classified laboratories 3 or higher.
Exception 2 to Section 140.4(o): Vivarium spaces.
Exception 3 to Section 140.4(o): Spaces that are required by applicable codes and standards to be maintained at a positive pressure differential relative to adjacent spaces.
Exception 4 to Section 140.4(o): Spaces where the highest amount of transfer air that could be used for exhaust makeup may exceed the available transfer airflow rate and where the spaces have a required negative pressure relationship.
Exception 5 to Section 140.4(o): Healthcare facilities.
Dedicated outdoor air systems (DOAS). HVAC systems that utilize a dedicated outdoor air system (DOAS) such as a DX-DOAS, HRV or ERV unit to condition, temper or filter 100 percent outdoor air separate from local or central space-conditioning systems serving the same space shall meet the following criteria:
DOAS unit fan systems with input power less than 1 kW shall not exceed a total combined fan power of 1.0 W/cfm. DOAS with fan power greater than or equal to 1 kW shall meet the requirements of Section 140.4 (c).
The DOAS supply air shall be delivered directly to the occupied space or at the outlet of any terminal heating or cooling coils and shall cycle off any zone heating and cooling equipment fans, circulation pumps and terminal unit fans when there is no call for heating or cooling in the zone.
Exception 1 to Section 140.4(p)2: Active chilled beam systems.
Exception 2 to Section 140.4(p)2: Sensible-only cooling terminal units with pressure-independent variable-airflow regulating devices limiting the DOAS supply air to the greater of latent load or minimum ventilation requirements.
Exception 3 to Section 140.4(p)2: Any configuration where a DOAS unit provides ventilation air to a downstream fan (a terminal box, air handling unit or other space-conditioning equipment) where the total system airflow can be reduced to ventilation minimum or the downstream fan power is no greater than
0.12 watts per cfm when space temperatures are within the thermostat deadband (at low speed per manufacturer’s literature).
DOAS supply and exhaust fans shall have a minimum of three speeds to facilitate system balancing.
DOAS with mechanical cooling providing ventilation to multiple zones and operating in conjunction with zone heating and cooling systems shall not use heating or heat recovery to warm supply air above 60°F when representative building loads or outdoor air temperature indicates that the majority of zones require cooling.
Exhaust air heat recovery. Fan systems designed to operate to the criteria listed in either Table 140.4-J or Table 140.4-K shall include an exhaust air heat recovery system that meets the following:
A sensible energy recovery ratio of at least 60 percent or an enthalpy recovery ratio of at least 50 percent for both heating and cooling design conditions and a rating in accordance with AHRI 1060.
Energy recovery bypass or control to disable energy recovery and to directly economize with ventilation air based on outdoor air temperature limits specified in Table 140.4-G. For energy recovery systems where

the transfer of energy cannot be stopped, bypass shall prevent the total airflow rate of either outdoor air or exhaust air through the energy recovery exchanger from exceeding 10 percent of the full design airflow rate.
Exception to Section 140.4(q)2: For DOAS units with the capability to shut off when a separate space- conditioning system serving the same space meets the economizer requirements in Section 140.4(e)1A.
Exception 1 to Section 140.4(q): Systems meeting Section 140.9(c), Prescriptive requirements for laboratory and factory exhaust systems.
Exception 2 to Section 140.4(q): Systems serving spaces that are not cooled and that are heated to less than 60°F.
Exception 3 to Section 140.4(q): Where more than 60 percent of the outdoor air heating energy is provided from site-recovered energy in Climate Zone 16.
Exception 4 to Section 140.4(q): Sensible recovery ratio requirements at heating design conditions are exempted for Climate Zone 15.
Exception 5 to Section 140.4(q): Sensible recovery ratio requirements at cooling design conditions are exempted for Climate Zone 1.
Exception 6 to Section 140.4(q): Where the sum of the airflow rates exhausted and relieved within 20 feet of each other is less than 75 percent of the design outdoor airflow rate, excluding exhaust air that is either:
used for another energy recovery system,
not allowed by the California Mechanical Code (Title 24, Part 4) (CMC) for use in energy recovery systems with leakage potential, or
of Class 4 as specified in Section 120.1(g).
Exception 7 to Section 140.4(q): Systems expected to operate less than 20 hours per week.

TABLE 140.4-J: ENERGY RECOVERY REQUIREMENTS BY CLIMATE ZONE AND PERCENT OUTDOOR AIR AT FULL DESIGN AIRFLOW (<8,000 HOURS / YEAR)

% Outdoor Air at Full Design
Airflow	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	
≥10% and <20%	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	
≥20% and <30%	≥15,000	≥20,000	NR	NR	NR	NR	NR	NR	NR	NR	≥18,500	≥18,500	≥18,500	≥18,500	≥18,500	≥18,500	
≥30% and <40%	≥13,000	≥15,000	NR	NR	NR	NR	NR	NR	NR	NR	≥15,000	≥15,000	≥15,000	≥15,000	≥15,000	≥15,000	
≥40% and <50%	≥10,000	≥12,000	NR	NR	NR	NR	NR	NR	NR	≥22,000	≥10,000	≥10,000	≥10,000	≥10,000	≥10,000	≥10,000	
≥50% and <60%	≥9,000	≥10,000	NR	≥18,500	NR	NR	NR	NR	NR	≥17,000	≥8,000	≥8,000	≥8,000	≥8,000	≥8,000	≥8,000	
≥60% and <70%	≥7,000	≥7,500	NR	≥16,500	NR	NR	NR	NR	≥20,000	≥15,000	≥7,000	≥7,000	≥7,000	≥7,000	≥7,000	≥7,000	
≥70% and <80%	≥6,500	≥7,000	NR	≥15,000	NR	NR	NR	NR	≥17,000	≥14,000	≥5,000	≥5,000	≥5,000	≥5,000	≥5,000	≥5,000	
≥80%	≥4,500	≥6,500	NR	≥14,000	NR	NR	NR	NR	≥15,000	≥13,000	≥2,000	≥2,000	≥2,000	≥2,000	≥2,000	≥2,000	
NOTES to Table 140.4-J:
Flow rates in Table 140.4-J represent the design supply fan airflow rate in CFM.
For a DOAS unit providing outdoor air to another space-conditioning system, the full design supply fan airflow rate shall be the total airflow of only the DOAS unit.

TABLE 140.4-K: ENERGY RECOVERY REQUIREMENTS BY CLIMATE ZONE AND PERCENT OUTDOOR AIR AT FULL DESIGN AIRFLOW (≥8,000 HOURS / YEAR)

% Outdoor Air at Full Design Airflow	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	
≥10% and <20%	≥10,000	≥10,000	NR	NR	NR	NR	NR	NR	NR	≥40,000	≥40,000	≥20,000	≥10,000	≥10,000	≥10,000	≥10,000	
≥20% and <30%	≥2,000	≥5,000	≥13,000	≥9,000	≥9,000	NR	NR	NR	NR	≥15,000	≥15,000	≥5,000	≥5,000	≥5,000	≥5,000	≥5,000	
≥30% and <40%	≥2,000	≥3,000	≥10,000	≥6,500	≥6,500	NR	NR	NR	≥15,000	≥7,500	≥7,500	≥3,000	≥3,000	≥3,000	≥3,000	≥3,000	
≥40% and <50%	≥2,000	≥2,000	≥8,000	≥6,000	≥6,000	NR	NR	NR	≥12,000	≥6,000	≥6,000	≥2,000	≥2,000	≥2,000	≥2,000	≥2,000	
≥50% and <60%	≥2,000	≥2,000	≥7,000	≥6,000	≥6,000	NR	NR	≥20,000	≥10,000	≥5,000	≥5,000	≥2,000	≥2,000	≥2,000	≥2,000	≥2,000	
≥60% and <70%	≥2,000	≥2,000	≥6,000	≥6,000	≥6,000	NR	NR	≥18,000	≥9,000	≥4,000	≥4,000	≥2,000	≥2,000	≥2,000	≥2,000	≥2,000	
≥70% and <80%	≥2,000	≥2,000	≥6,000	≥5,000	≥5,000	NR	NR	≥15,000	≥8,000	≥3,000	≥3,000	≥2,000	≥2,000	≥2,000	≥2,000	≥2,000	
≥80%	≥2,000	≥2,000	≥6,000	≥5,000	≥5,000	NR	NR	≥12,000	≥7,000	≥3,000	≥3,000	≥2,000	≥2,000	≥2,000	≥2,000	≥2,000	
NOTES totable 140.4-K:
Flow rates in Table 140.4-K represent the design supply fan airflow rate in CFM.
	For a DOAS unit providing outdoor air to another space-conditioning system, the full design supply fan airflow rate shall be the total airflow of only the DOAS unit.
Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections 25007, 25008, 25218.5, 25310, 25402, 25402.1,
25402.4, 25402.8, and 25943, Public Resources Code.

SECTION 140.5 – PRESCRIPTIVE REQUIREMENTS FOR SERVICE WATER HEATING SYSTEMS
Nonresidential occupancies. Service water-heating systems in nonresidential buildings shall meet the requirements of 1 or 2 below, or meet the performance compliance requirements of Section 140.1:
School buildings less than 25,000 square feet and less than 4 stories in Climate Zones 2 through 15. A heat pump water-heating system that meets the applicable requirements of Sections 110.1, 110.3 and 120.3.
All other occupancies. A service water-heating system that meets the applicable requirements of Sections 110.1, 110.3, 120.3 and 140.5(c).
Exception to Section 140.5(a)1: A water-heating system serving an individual bathroom space may be an instantaneous electric water heater.
Hotel/motel occupancies. A service water-heating system installed in hotel/motel buildings shall meet the requirements of Section 170.2(d).
High-capacity service water-heating systems. Gas service water-heating systems with a total installed gas water-heating input capacity of 1 MMBtu/h or greater shall have gas service water-heating equipment with a minimum thermal efficiency of 90 percent. Multiple units can meet this requirement if the water-heating input
provided by equipment with thermal efficiencies above and below 90 percent averages out to an input capacity- weighted average of at least 90 percent.
Exception 1 to Section 140.5(c): If 25 percent of the annual service water-heating requirement is provided by site-solar energy or site-recovered energy.
Exception 2 to Section 140.5(c): Water heaters installed in individual dwelling units.
Exception 3 to Section 140.5(c): Individual gas water heaters with input capacity at or below 100,000 Btu/h shall not be included in the calculations of the total system input or total system efficiency.
Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.8, and 25943, Public Resources Code.

SECTION 140.6 – PRESCRIPTIVE REQUIREMENTS FOR INDOOR LIGHTING
A building complies with this section if:
The calculation of adjusted indoor lighting power of all proposed building areas combined, calculated under Subsection (a) is no greater than the calculation of allowed indoor lighting power, specific methodologies calculated under Subsection (c); and

The calculation of allowed indoor lighting power, general rules comply with Subsection

> (b).

The prescriptive limits on indoor lighting power are the smaller of the adjusted and allowed indoor lighting power values determined in accordance with Item i.
Calculation of adjusted indoor lighting power. The adjusted indoor lighting power of all proposed building areas is the total watts of all planned permanent and portable lighting systems in all areas of the proposed building; subject to the applicable adjustments under Subdivisions 1 through 4 of this subsection and the requirements of Subdivision 4 of this subsection.
Exception to Section 140.6(a): Up to 0.3 watts per square foot of portable lighting for office areas shall not be required to be included in the calculation of actual indoor lighting power.
Two interlocked lighting systems. No more than two lighting systems may be used for an area, and if there are two they must be interlocked. Where there are two interlocked lighting systems, the watts of the lower wattage system may be excluded from the adjusted indoor lighting power density if:
An installation certificate detailing compliance with Section 140.6(a)1 is submitted in accordance with Sections 10-103 and 130.4; and
The area or areas served by the interlocking systems is an auditorium, a convention center, a conference room, a multipurpose room or a theater; and
The two lighting systems are interlocked with a nonprogrammable double-throw switch to prevent simultaneous operation of both systems.
For compliance with Part 6 a nonprogrammable double-throw switch is an electrical switch commonly called a “single pole double throw” or “three-way” switch that is wired as a selector switch allowing one of two loads to be enabled. It can be a line voltage switch or a low voltage switch selecting between two relays. It cannot be overridden or changed in any manner that would permit both loads to operate simultaneously.
Reduction of wattage through controls. In calculating adjusted indoor lighting power, the installed watts of a luminaire providing general lighting in an area listed in Table 140.6-A may be reduced by the product of (i) the number of watts controlled as described in Table 140.6-A, times (ii) the applicable power adjustment factor (PAF), if all of the following conditions are met:
An installation certificate is submitted in accordance with Section 130.4(b), and
Luminaires and controls meet the applicable requirements of Section 110.9, and Sections 130.0 through 130.5; and
The controlled lighting is permanently installed general lighting systems and the controls are permanently installed nonresidential-rated lighting controls.
When used for determining PAFs for general lighting in offices, furniture mounted luminaires that comply with all of the following conditions shall qualify as permanently installed general lighting systems:
The furniture mounted luminaires shall be permanently installed no later than the time of building permit inspection; and
The furniture mounted luminaires shall be permanently hardwired; and
The furniture mounted lighting system shall be designed to provide indirect general lighting; and

Before multiplying the installed watts of the furniture mounted luminaire by the applicable PAF,
0.2 watts per square foot of the area illuminated by the furniture mounted luminaires shall be subtracted from installed watts of the furniture mounted luminaires; and
The lighting control for the furniture mounted luminaire complies with all other applicable requirements in Section 140.6(a)2.
At least 50 percent of the light output of the controlled luminaire is within the applicable area listed in Table 140.6-A. Luminaires on lighting tracks shall be within the applicable area in order to qualify for a PAF.
Only one PAF from Table 140.6-A may be used for each qualifying luminaire. PAFs shall not be added together unless allowed in Table 140.6-A.
Only lighting wattage directly controlled in accordance with Section 140.6(a)2 shall be used to reduce the installed watts as allowed by Section 140.6(a)2 for calculating the Adjusted Indoor Lighting Power. If only a portion of the wattage in a luminaire is controlled in accordance with Section 140.6(a)2, then only that portion of controlled wattage may be reduced in calculating adjusted indoor lighting power.
Lighting controls used to qualify for a PAF shall be designed and installed in addition to manual, multilevel, and automatic lighting controls required in Section 130.1, and in addition to any other lighting controls required by any provision of Part 6. PAFs shall not be available for lighting controls required by Part 6.
To qualify for the PAF for daylight continuous dimming plus OFF control, the daylight control and controlled luminaires shall comply with Section 130.1(d), 130.4(a)3 and 130.4(a)7, and the daylight control shall be continuous dimming and shall additionally turn lights completely OFF when the daylight available in the daylit zone is greater than 150 percent of the illuminance received from the general lighting system at full power. The PAF shall apply to the luminaires in the primary sidelit daylit zone, secondary sidelit daylit zone and skylit daylit zone.
To qualify for the PAF for an occupant sensing control controlling the general lighting in large office areas above workstations, in accordance with Table 140.6-A, the following requirements shall be met:
The office area shall be greater than 250 square feet; and
This PAF shall be available only in office areas which contain workstations; and
Controlled luminaires shall only be those that provide general lighting directly above the controlled area, or furniture mounted luminaires that comply with Section 140.6(a)2 and provide general lighting directly above the controlled area; and
Qualifying luminaires shall be controlled by occupant sensing controls that meet all of the following requirements, as applicable:
Infrared sensors shall be equipped by the manufacturer, of fitted in the field by the installer, with lenses or shrouds to prevent them from being triggered by movement outside of the controlled area.
Ultrasonic sensors shall be tuned to reduce their sensitivity to prevent them from being triggered by movements outside of the controlled area.
All other sensors shall be installed and adjusted as necessary to prevent them from being triggered by movements outside of the controlled area.
To qualify for the PAF for an Institutional Tuning in Table 140.6-A, the tuned lighting system shall comply with all of the following requirements:
The lighting controls shall limit the maximum output or maximum power draw of the controlled lighting to 85 percent or less of full light output or full power draw; and
The means of setting the limit is accessible only to authorized personnel; and

The setting of the limit is verified by the acceptance test required by Section 130.4(a)7; and
The construction documents specify which lighting systems shall have their maximum light output or maximum power draw set to no greater than 85 percent of full light output or full power draw.
To qualify for the PAF for a demand responsive control in Table 140.6-A, the general lighting wattage receiving the PAF shall not be within the scope of Section 110.12(c) and a demand responsive control shall meet all of the following requirements:
The controlled lighting shall be capable of being automatically reduced in response to a demand response signal; and
General lighting shall be reduced in a manner consistent with uniform level of illumination requirements in Table 130.1-A.
To qualify for the PAFs for clerestory fenestration, horizontal slats, or light shelves in Table 140.6-A, the daylighting design shall meet the requirements in Section 140.3(d). The PAFs shall only apply to lighting in a primary or secondary sidelit daylit zone where continuous dimming daylighting controls meeting the requirements of Section 130.1(d) are installed.
Lighting wattage excluded. The watts of the following indoor lighting applications may be excluded from adjusted indoor lighting power. (Indoor lighting not listed below shall comply with all applicable nonresidential indoor lighting requirements in Part 6):
In theme parks: lighting for themes and special effects;
Studio lighting for film or photography, provided that these lighting systems are in addition to and separately switched from a general lighting system;
Lighting for dance floors, lighting for theatrical and other live performances, and theatrical lighting used for religious worship, provided that these lighting systems are additions to a general lighting system and are separately controlled by a multiscene or theatrical cross-fade control station accessible only to authorized operators;
Lighting intended for makeup, hair, and costume preparation in performing arts facility dressing rooms, provided that the lighting is separately switched from the general lighting system, switched independently at each dressing station, and is controlled with a vacancy sensor.
In civic facilities, transportation facilities, convention centers and hotel function areas: lighting for temporary exhibits, if the lighting is in addition to a general lighting system, and is separately controlled from a panel accessible only to authorized operators;
Lighting installed by the manufacturer in walk-in coolers or freezers, vending machines, food preparation equipment, and scientific and industrial equipment;
Examination and surgical lights, low ambient night lights and lighting integral to medical equipment, provided that these lighting systems are additions to and separately switched from a general lighting system;
Lighting for plant growth or maintenance in non-CEH spaces, if it is controlled by a multilevel astronomical time-switch control that complies with the applicable provisions of Section 110.9;
Lighting equipment that is for sale;
Lighting demonstration equipment in lighting education facilities;
Lighting that is required for exit signs subject to the CBC. Exit signs shall meet the requirements of the Appliance Efficiency Regulations;
Exit way or egress illumination that is normally off and that is subject to the CBC;
In hotel/motel buildings, lighting in guest rooms (lighting in hotel/motel guestrooms shall comply with Section 130.0(b). (Indoor lighting not in guestrooms shall comply with all applicable nonresidential lighting requirements in Part 6.)

Reserved.
Temporary lighting systems.
Lighting in occupancy group U buildings less than 1,000 square feet;
Lighting in unconditioned agricultural buildings less than 2,500 square feet;
Lighting systems in qualified historic buildings, as defined in the California Historical Building Code (Title 24, Part 8), are exempt from the lighting power density allowances, if they consist solely of historic lighting components or replicas of historic lighting components. If lighting systems in qualified buildings contain some historic lighting components or replicas of historic components, combined with other lighting components, only those historic or historic replica components are exempt. All other lighting systems in qualified historic buildings shall comply with the lighting power density allowances;
Lighting in nonresidential parking garages for seven or less vehicles: Lighting in nonresidential parking garages for seven or less vehicles shall comply with the applicable residential parking garage provisions of Section 150.0(k).
Lighting for signs: Lighting for signs shall comply with Section 140.8.
Lighting in refrigerated cases less than 3,000 square feet. (Lighting in refrigerated cases less than 3,000 square feet shall comply with the Title 20 Appliance Efficiency Regulations).
Lighting in elevators where the lighting meets the requirements in Section 120.6(f).
Lighting connected to a Life Safety Branch or Critical Branch, as specified in Section 517 of the California Electrical Code.
Horticultural lighting in CEH spaces (indoor growing and greenhouses) complying with Section 120.6(h).
Luminaire classification and power adjustment.
Luminaire classification and power shall be determined in accordance with Section 130.0(c).
Small aperture tunable-white and dim-to-warm luminaires lighting power adjustment. For qualifying small aperture tunable-white and dim-to-warm LED luminaires, the adjusted indoor lighting power of these luminaires shall be calculated by multiplying their maximum rated wattage by 0.80. Qualifying luminaires shall meet all of the following:
Small aperture. Qualifying luminaires with a luminaire aperture length longer than 18 inches shall have a luminaire aperture no wider than four inches. Qualifying luminaires with a luminaire aperture length of 18 inches or less shall have a luminaire aperture no wider than eight inches.
Color changing. qualifying tunable-white luminaires shall be capable of a color change greater than or equal to 2,000 Kelvin correlated color temperature (CCT). Qualifying dim-to-warm luminaires shall be capable of color change greater than or equal to 500 Kelvin CCT.
Controls. Qualifying luminaires shall be connected to controls that allows color changing of the luminaires.
Tailored method display lighting mounting height lighting power adjustment. For wall display luminaires or floor display luminaires meeting Tailored Method Section 140.6(c)3G and H and where the bottom of luminaires are 10 feet 7 inches and greater above the finished floor, the adjusted indoor lighting power of these luminaires shall be calculated by multiplying their maximum rated wattage and the appropriated mounting height adjustment factor from Table 140.6-E. Luminaire mounting height is the distance from the finished floor to the bottom of the luminaire. General lighting shall not qualify for a mounting height multiplier.

Calculation of allowed indoor lighting power: general rules.
The allowed indoor lighting power allotment for conditioned areas shall be calculated separately from the allowed lighting power allotment for unconditioned areas. Each allotment is applicable solely to the area to which it applies, and there shall be no trade-offs between conditioned and unconditioned area allotments.
Allowed indoor lighting power allotment shall be calculated separately from the allowed outdoor lighting power allotment. Each allotment is applicable solely to the area to which it applies, and there shall be no trade-offs between the separate indoor and outdoor allotments.
The allowed indoor lighting power density allotment for general lighting shall be calculated as follows:
The complete building method, as described in Section 140.6(c)1, shall be used only for an entire building, except as permitted by Section 140.6(c)1. As described more fully in Section 140.6(c)1, and subject to the adjustments listed there, the allowed indoor lighting power allotment for general lighting for the entire building shall be calculated as follows:
For a conditioned building, the product of the square feet of conditioned space of the building times the applicable allotment of watts per square foot described in Table 140.6-B.
For an unconditioned building, the product of the square foot of unconditioned space of the building times the applicable allotment of watts per square feet described in Table 140.6-B.
The area category method, as described in Section 140.6(c)2, shall be used either by itself for all areas in the building, or when some areas in the building use the tailored method described in Section 140.6(c)3. Under the area category method (either by itself or in conjunction with the tailored method), as described more fully in Section 140.6(c)2, and subject to the adjustments listed there, the allowed indoor lighting power allotment for general lighting shall be calculated for each area in the building as follows:
For conditioned areas, by multiplying the conditioned square feet of the area times the applicable allotment of watts per square foot for the area shown in Table 140.6-C (or Table 140.6-D if the tailored method is used for that area).
For unconditioned areas, by multiplying the unconditioned square feet of the area times the applicable allotment of watts per square foot for the area shown in Table 140.6-C (or Table 140.6- D if the tailored method is used for that area).
The allowed indoor lighting power allotment for general lighting for one area for which the area category method was used may be increased up to the amount that the allowed indoor lighting power allotment for general lighting for another area using the area category method or tailored method is decreased, except that such increases and decreases shall not be made between conditioned and unconditioned space.
The tailored method, as described in Section 140.6(c)3, shall be used either by itself for all areas in the building, or when some areas in the building use the area category method described in Section 140.6(c)2. Under the tailored method (either by itself or in conjunction with the area category method) as described more fully in Section 140.6(c)3, and subject to the adjustments listed there, allowed indoor lighting power allotment for general lighting shall be calculated for each area in the building as follows:
For conditioned areas, by multiplying the conditioned square feet of the area times the applicable allotment of watts per square foot for the area shown in Table 140.6-D (or Table 140.6-C if the area category method is used for that area);
For unconditioned areas, by multiplying the unconditioned square feet of the area times the applicable allotment of watts per square foot for the area shown in Table 140.6-D (or Table 140.6-C if the area category method is used for that area);

The allowed indoor lighting power allotment for general lighting for one area for which the Tailored Method was used may be increased up to the amount that the allowed indoor power lighting for general lighting for another area is decreased, but only if the Tailored Method or Area Category Method was used for the other area, except that such increases and decreases shall not be made between conditioned and unconditioned space.
D. If the Area Category Method is used for an area, the Tailored Method may not be used for that area. If the Tailored Method is used for an area, the Area Category Method may not be used for that area.
Allowed Indoor Lighting Power allotments for all lighting power allotments other than general lighting shall be restricted as follows:
When using the Area Category Method, allowed Indoor Lighting Power allotments for specialized task work; precision commercial and industrial work; white board or chalk board; accent, display and feature; decorative; or Videoconferencing Studio; may not be increased as a result of, or otherwise traded off against, decreasing any other allotment; and
When using the Tailored Method, allowed indoor lighting power allotments for wall display; floor display and task; decorative/special effect; or very valuable display case; may not be increased, or otherwise traded between any of the separate allotments.
Calculation of allowed indoor lighting power: specific methodologies. The allowed indoor lighting power for each building type, or each primary function area shall be calculated using only one of the methods in Subsection 1, 2 or 3 below as applicable.
Complete Building Method. Requirements for using the Complete Building Method include all of the following:
The Complete Building Method shall be used only for building types, as defined in Section 100.1, that are specifically listed in TABLE 140.6-B. (For example, retail and wholesale stores, hotel/motel, and high-rise residential buildings shall not use this method.)
The Complete Building Method shall be used only on projects involving:
Entire buildings with one type of use occupancy; or
Mixed occupancy buildings where one type of use makes up at least 90 percent of the entire building (in which case, when applying the Complete Building Method, it shall be assumed that the primary use is 100 percent of the building); or
A tenant space where one type of use makes up at least 90 percent of the entire tenant space (in which case, when applying the Complete Building Method, it shall be assumed that the primary use is 100 percent of the tenant space).
The Complete Building Method shall be used only when the applicant is applying for a lighting permit and submits plans and specifications for the entire building or the entire tenant space.
Under the Complete Building Method, the allowed indoor lighting power allotment is the lighting power density value times the floor area of the entire building.
For buildings including a parking garage plus another type of use listed in Table 140.6-B, the parking garage portion of the building and other type of use portion of the building shall each separately use the Complete Building Method.
Area Category Method. Requirements for using the Area Category Method include all of the following:
The Area Category Method shall be used only for primary function areas, as defined in Section 100.1, that are listed in Table 140.6-C. For primary function areas not listed, selection of a reasonably equivalent type shall be permitted.
Primary function areas in TABLE 140.6-C shall not apply to a complete building. Each primary function area shall be determined as a separate area.

For purposes of compliance with Section 140.6(c)2, an “area” shall be defined as all contiguous areas that accommodate or are associated with a single primary function area listed in Table 146.0-C.
Where areas are bounded or separated by interior partitions, the floor area occupied by those interior partitions may be included in primary function area.
If at the time of permitting for a newly constructed building, a tenant is not identified for a multitenant area, a maximum of 0.4 watts per square foot shall be allowed for the lighting in each area in which a tenant has not been identified. The area shall be classified as unleased tenant area.
Under the Area Category Method, the allowed indoor lighting power for each primary function area is the lighting power density value in Table 140.6-C times the square feet of the primary function area. The total allowed indoor lighting power density for the building is the sum of all allowed indoor lighting powers densities for all areas in the building.
In addition to the allowed indoor lighting power calculated according to Sections 140.6(c)2A through F, the building may add additional lighting power allowances for qualifying lighting systems as specified in the Qualifying Lighting Systems column in TABLE 140.6-C under the following conditions:
Only primary function areas having a lighting system as specified in the Qualifying Lighting Systems column in TABLE 140.6-C and in accordance with the corresponding footnote of the TABLE shall qualify for the additional lighting power allowances; and
The additional lighting power allowances shall be used only if the plans clearly identify all applicable task areas and the lighting equipment designed to illuminate these tasks; and
Tasks that are performed less than two hours per day or poor quality tasks that can be improved are not eligible for the additional lighting power allowances; and
The additional lighting power allowances shall not utilize any type of luminaires that are used for general lighting in the building; and
The additional lighting power allowances shall not be used when using the Complete Building Method, or when the Tailored Method is used for any area in the building; and
The additional lighting power allowed is the smaller of:
the lighting power density listed in the “Allowed Additional Lighting LPD” column in Table 140.6-C, times the square feet of the primary function, or
the adjusted indoor lighting power of the applicable lighting; and
In addition to meeting Sections 140.6(c)2Gi through vi, additional lighting power for videoconferencing as specified in Table 140.6-C shall be allowed in a videoconferencing studio, as defined in Section 100.1, provided the following conditions are met:
A completed and signed installation certificate is prepared and submitted in accordance with Section 130.4(b), specifically detailing compliance with the applicable requirements of Section 140.6(c)2Gvii; and
The videoconferencing studio is a room with permanently installed videoconferencing cameras, audio equipment, and playback equipment for both audio-based and video-based two-way communication between local and remote sites; and
General lighting is switched in accordance with Table 130.1-A; and
Wall wash lighting is separately switched from the general lighting system; and
All of the lighting in the studio, including general lighting and additional lighting power allowed by Section 140.6(c)2Gvii is controlled by a multiscene programmable control system (also known as a scene preset control system).
Tailored method. Requirements for using the Tailored Method include all of the following:

The Tailored Method shall be used only for primary function areas listed in Table 140.6-D, as defined in Section 100.1.
Allowed indoor lighting power allotments for general lighting shall be determined according to Section 140.6(c)3F, as applicable.
For compliance with Section 140.6(c)3, an “area” shall be defined as all contiguous areas that accommodate or are associated with a single primary function area listed in Table 140.6-D.
Where areas are bounded or separated by interior partitions, the floor area occupied by those interior partitions may be included in a primary function area.
In addition to the allowed indoor lighting power allotments for general lighting calculated according to Sections 140.6(c)3F, as applicable, the building may add additional lighting power allowances for wall display lighting, floor display lighting and task lighting, decorative/special effects lighting, and very valuable display cases lighting according to Sections 140.6(c)3G through J.
Determine allowed indoor lighting power allotments for general lighting for primary function areas listed in Table 140.6-D as follows:
Use the General Illumination Level (Lux) listed in Column 2 of Table 140.6-D to determine the allowed general lighting power density allotments for the area.
Determine the room cavity ratio (RCR) for the area. The RCR shall be calculated according to the applicable equation in Table 140.6-F.
Find the allowed general lighting power density allotments in Table 140.6-G that is applicable to the general illuminance level (Lux) from Column 2 of Table 140.6-D (as described in Item i) and the RCR determined in accordance with Table 140.6-F (as described in Item ii).
Determine the square feet of the area in accordance with Section 140.6(c)3C and D.
Multiply the allowed lighting power density allotment, as determined in accordance with Item iii by the square feet of each primary function area, as determined in accordance with Item iv. The product is the allowed indoor lighting power allotment for general lighting for the area.
Determine additional allowed power for wall display lighting according to column 3 of Table 140.6-D for each primary function area as follows:
Floor displays shall not qualify for wall display allowances.
Qualifying wall lighting shall:
Be mounted within 10 feet of the wall having the wall display. When track lighting is used for wall display, and where portions of that lighting track are more than 10 feet from the wall and other portions are within 10 feet of the wall, portions of track more than 10 feet from the wall shall not be used for the wall display allowance.
Be a lighting system type appropriate for wall lighting. Lighting systems appropriate for wall lighting are lighting track adjacent to the wall, wall-washer luminaires, luminaires behind a wall valance or wall cove, or accent light. (Accent luminaires are adjustable or fixed luminaires with PAR, R, MR, AR or luminaires providing directional display light.)
Additional allowed power for wall display lighting is available only for lighting that illuminates walls having wall displays. The length of display walls shall include the length of the perimeter walls, including but not limited to closable openings and permanent full height interior partitions. Permanent full height interior partitions are those that (I) extend from the floor to within two feet of the ceiling or are taller than ten feet and (II) are permanently anchored to the floor.
	For wall display lighting where the bottom of the luminaire is greater than 10 feet 6 inches above the finished floor, the mounting height adjustment factor from Table 140.6-E can be used to adjust the installed luminaire wattage as specified in Section 140.6(a)4C.

The allowed power for wall display lighting shall be the smaller of:
the “wall display lighting power density” determined in accordance with Table 140.6-D, multiplied by the wall display lengths determined in accordance with Item iii; and
The adjusted indoor lighting power used for the wall display lighting systems.
Lighting internal to display cases that are attached to a wall or directly adjacent to a wall are counted as wall display lighting as specified in Section 140.6(c)3G. All other lighting internal to display cases are counted as floor display lighting as specified in Section 140.6(c)3H, or as very valuable display case lighting as specified in Section 140.6(c)3J.
Determine additional allowed power for floor display lighting and task lighting as follows:
Displays that are installed against a wall shall not qualify for the floor display lighting power allowances.
Lighting internal to display cases that are not attached to a wall and not directly adjacent to a wall shall be counted as floor display lighting in accordance with Section 140.6(c)3H; or very valuable display case lighting in accordance with Section 140.6(c)3J.
Additional allowed power for floor display lighting, and additional allowed power for task lighting, may be used by qualifying floor display lighting systems, qualifying task lighting systems, or a combination of both. For floor areas qualifying for both floor display and task lighting power allowances, the additional allowed power shall be used only once for the same floor area, so that the allowance shall not be additive.
Qualifying floor display lighting shall:
Be mounted no closer than 2 feet to a wall.
Consist of only (I) directional lamp types, such as PAR, R, MR, AR; or (II) luminaires providing directional display light.
If track lighting is used, shall be only track heads that are classified as direction lighting types.
Qualifying task lighting shall:
Be located immediately adjacent to and capable of illuminating the task for which it is installed.
Be of a type different from the general lighting system.
Be separately switched from the general lighting system.
If there are illuminated floor displays, floor display lighting power shall be used only if allowed by Column 4 of Table 140.6-D.
The square footage of floor display or the square footage of task areas shall be determined in accordance with Section 140.6(c)3C and D, except that any floor area designed to not have floor displays or tasks, such as floor areas designated as a path of egress, shall not be included for the floor display allowance.
For floor display lighting where the bottom of the luminaire is greater than 10.6 feet above the finished floor, multiply the floor display installed watts by the appropriate mounting height adjustment factor from Table 140.6-E to calculate the Adjusted Indoor Lighting Power as specified in Section 140.6(a)4C.
The allowed power for floor display lighting for each applicable area shall be the smaller of:
the allowed floor display and task lighting power determined in accordance with Section 140.6(c)3Hvi multiplied by the floor square footage determined in accordance with Section 140.6(c)3Hvii; and
The Adjusted Indoor Lighting Power used for the floor display lighting systems.

Determine additional allowed power for decorative/special effects lighting as follows:
Qualifying decorative lighting includes luminaires such as chandeliers, sconces, lanterns, neon and cold cathode, light emitting diodes, theatrical projectors, moving lights and light color panels, when any of those lights are used in a decorative manner that does not serve as display lighting or general lighting.
Additional lighting power for decorative/special effects lighting shall be used only if allowed by Column 5 of Table 140.6-D.
Additional lighting power for decorative/special effects lighting shall be used only in areas having decorative/special effects lighting. The square footage of the floor area shall be determined in accordance with Section 140.6(c)3C and D, and it shall not include floor areas not having decorative/special effects lighting.
The additional allowed power for decorative/special effects lighting for each applicable area shall be the smaller of:
The product of the allowed decorative/special effects lighting power determined in accordance with Section 140.6(c) 3Iii, multiplied by the floor square footage determined in accordance with Section 140.6(c) 3Iiii; and
The adjusted indoor lighting power of allowed decorative/special effects lighting.
J.	Determine additional allowed power for very valuable display case lighting as follows:
Additional allowed power for very valuable display case lighting shall be available only for display cases in appropriate function areas in retail merchandise sales, museum and religious worship.
To qualify for additional allowed power for very valuable display case lighting, a case shall contain jewelry, coins, fine china, fine crystal, precious stones, silver, small art objects and artifacts, and/or valuable collections the display of which involves customer inspection of very fine detail from outside of a locked case.
	Qualifying lighting includes internal display case lighting or external lighting employing highly directional luminaires specifically designed to illuminate the case or inspection area without spill light, and shall not be fluorescent lighting unless installed inside of a display case.
If there is qualifying very valuable display case lighting in accordance with Section 140.6(c)3Jii, the smallest of the following separate lighting power for display cases presenting very valuable display items is permitted:
The product of the area of the primary function and 0.50 watt per square foot; or
The product of the area of the display case and 7 watts per square foot; or
The adjusted indoor lighting power of lighting for very valuable displays.

TABLE 140.6-A LIGHTING POWER ADJUSTMENT FACTORS (PAF)
TYPE OF CONTROL	TYPE OF AREA	FACTOR	
To qualify for any of the Power Adjustment Factors in this table, the installation shall comply with the applicable requirements in Section 140.6(a)2
Only one PAF may be used for each qualifying luminaire unless combined below.
Lighting controls that are required for compliance with Part 6 shall not be eligible for a PAF	
1. Daylight Continuous Dimming plus OFF Control	Luminaires in skylit daylit zone or primary sidelit daylit zone or secondary sidelit daylit zone	0.10	
2. Occupant Sensing Controls in Offices Larger than 250 square feet	One sensor controlling an area that is:	No larger than 125 square feet	0.30	
		From 126 to 250 square feet	0.20	
3.Institutional Tuning	Luminaires in non-daylit areas.
Luminaires that qualify for other PAFs in this table may also qualify for this tuning PAF.	0.10	
	Luminaires in daylit areas.
Luminaires that qualify for other PAFs in this table may also qualify for this tuning PAF.	0.05	
4. Demand Responsive Control	General lighting luminaires not in the scope of Section 110.12(c). Luminaires that qualify for other PAFs in this table may also qualify for this demand responsive control PAF	0.05	
5. Clerestory Fenestration	Luminaires in daylit areas adjacent to the clerestory.
Luminaires that qualify for daylight dimming plus OFF control may also qualify for this PAF.	0.05	
6. Horizontal Slats	Luminaires in daylit areas adjacent to vertical fenestration with interior or exterior horizontal slats.
Luminaires that qualify for daylight dimming plus OFF control may also qualify for this PAF.	0.05	
7.Light Shelves	Luminaires in daylit areas adjacent to clerestory fenestration with interior or exterior light shelves. This PAF may be combined with the PAF for clerestory fenestration.
Luminaires that qualify for daylight dimming plus OFF control may also qualify for this PAF	0.10	

TABLE 140.6-B COMPLETE BUILDING METHOD LIGHTING POWER DENSITY VALUES
TYPE OF BUILDING	ALLOWED LIGHTING POWER DENSITY (WATTS PER SQUARE FOOT)	
Assembly Building	0.65	
Bank or Financial Institution Building	0.65	
Grocery Store Building	0.90	
Gymnasium Building	0.60	
Healthcare Facility	0.90	
Industrial/Manufacturing Facility Building	0.60	
Library Building	0.70	
Motion Picture Theater Building	0.60	
Museum Building	0.65	
Office Building	0.60	
Parking Garage Building	0.13	
Performing Arts Theater Building	0.75	
Religious Facility Building	0.70	
Restaurant Building	0.65	
Retail Store Building	0.90	
School Building	0.60	
Sports Arena Building	0.75	
All other buildings	0.40	

TABLE 140.6-C AREA CATEGORY METHOD - LIGHTING POWER DENSITY VALUES (WATTS/FT²)
Primary Function Area	Allowed Lighting Power Density for General Lighting (W/ft2)	Additional Lighting Power	
		Qualified Lighting Systems	Additional Allowance (W/ft², unless noted otherwise)	
Aging Eye/Low-vision11	Corridor Area	0.70	Decorative/Display	0.30	
	Dining	0.80	Decorative/Display	0.30	
			Tunable white or dim-to- warm10	0.10	
	Lobby, Main Entry	0.85	Decorative/Display	0.30	
			Transition Lighting OFF at night12	0.95	
			Tunable white or dim-to- warm10	0.10	
	Lounge/Waiting Area	0.80	Decorative/Display	0.30	
			Tunable white or dim-to- warm10	0.10	
	Multipurpose Room	0.85	Decorative/Display	0.30	
			Tunable white or dim-to- warm10	0.10	
	Religious Worship Area	1.00	Decorative/Display	0.30	
			Tunable white or dim-to- warm10	0.10	
	Restroom	1.00	Decorative/Display	0.20	
	Stairwell	0.80	Decorative/Display	0.30	
Audience Seating Area	0.50	Decorative/Display	0.25	
Auditorium Area	0.70	Decorative/Display	0.45	
Auto Repair / Maintenance Area	0.55	Detailed Task Work7	0.20	
Barber, Beauty Salon, Spa Area	0.70	Detailed Task Work7	0.30	
		Decorative/Display	0.25	
Civic Meeting Place Area	0.90	Decorative/Display	0.25	
Classroom, Lecture, Training, Vocational Area	0.60	White or Chalk Board1	7 W/ft	
Concourse and Atria Area		0.60	Decorative/Display	0.25	
Convention, Conference, Multipurpose and Meeting Area	0.75	Decorative/Display	0.25	
Copy Room	0.50	-	-	
Corridor Area	0.40	Decorative/Display	0.25	
Dining Area	Bar/Lounge and Fine Dining	0.45	Decorative/Display	0.35	
	Cafeteria/Fast Food	0.45	Decorative/Display	0.25	
	Family and Leisure	0.40	Decorative/Display	0.25	
Electrical, Mechanical, Telephone Rooms	0.40	Detailed Task Work7	0.20	
Exercise/Fitness Center and Gymnasium Area	0.50	-	-	
Financial Transaction Area	0.70	Decorative/Display	0.25	
Healthcare Facility and Hospitals	Exam/Treatment Room	1.15	-	-	
	Imaging Room	0.60	Decorative/Display	0.20	

			Tunable white or dim-to- warm10	0.10	
	Medical Supply Room	0.55	-	-	
	Nursery	0.80	Tunable white or dim-to- warm10	0.10	
	Nurse’s Station	0.85	Tunable white or dim-to- warm10	0.10	
			Detailed Task Work7	0.20	
	Operating Room	1.90	-	-	
	Patient Room	0.70	Decorative/Display	0.15	
			Tunable white or dim-to- warm10	0.10	
	Physical Therapy Room	0.75	Tunable white or dim-to- warm10	0.10	
	Recovery Room	0.90	Tunable white or dim-to- warm10	0.10	
Hotel Function Area	0.85	Decorative/Display	0.25	
Kitchen/Food Preparation Area	0.95	-	-	
Laboratory, Scientific	0.90	Specialized Task Work8	0.35	
Laundry Area	0.45	-	-	
Library	Reading Area	0.80	Decorative/Display	0.25	
	Stacks Area	1.00	-	-	
Lobby, Main Entry	0.70	Decorative/Display	0.25	
Locker Room	0.45	-	-	
Lounge, Breakroom, or Waiting Area	0.55	Decorative/Display	0.25	
Manufacturing, Commercial & Industrial Work Area	Low Bay	0.60	Detailed Task Work7	0.20	
	High Bay	0.65	Detailed Task Work7	0.20	
	Precision	0.85	Precision Specialized Work9	0.70	
Museum Area	Exhibition/Display	0.60	Decorative/Display	0.45	
	Restoration Room	0.70	Detailed Task Work7	0.35	
Office Area	> 250 square feet	0.60	Decorative/Display and Portable lighting for office areas6	0.20	
	≤ 250 square feet	0.65			
					
Parking Garage Area	Parking Zone and Ramps	0.10	First ATM or Ticket Machine	100 W	
			Additional ATM or Ticket Machine	50 W each	
	Daylight Adaptation Zones2	1.00	-	-	

Pharmacy Area	1.00	Specialized Task Work8	0.35	
Retail Sales Area	Grocery Sales	1.00	-	-	
			Decorative/Display	0.35	
	Retail Merchandise Sales	0.95	-	-	
			Decorative/Display	0.35	
	Fitting Room	0.60	External Illuminated Mirror5	40 W/ea	
			Internal Illuminated Mirror5	120 W/ea	
Religious Worship Area	0.95	Decorative/Display	0.25	
Restrooms	0.65	Decorative/Display	0.35	
Stairwell	0.60	Decorative/Display	0.35	
Storage, Commercial/Industrial	Warehouse	0.40	-	-	
	Shipping & Handling	0.60	-	-	
Sports Arena – Playing Area	Class I Facility13	2.25	-	-	
Sports Arena – Playing Area	Class II Facility13	1.45	-	-	
Sports Arena – Playing Area	Class III Facility13	1.10	-	-	
Sports Arena – Playing Area	Class IV Facility13	0.75	-	-	
Theater Area	Motion picture	0.50	Decorative/Display	0.25	
Theater Area	Performance	0.80	Decorative/Display	0.25	
Transportation Function	Baggage Area	0.40	-	-	
	Ticketing Area	0.45	Decorative/Display	0.20	
Videoconferencing Studio	0.90	Videoconferencing14	1.00	
All other	0.40	-	-	
Footnotes for this table are listed below.
White board or chalk board. – Directional lighting dedicated to a white board or chalk board.
Daylight Adaptation Zones shall be no longer than 66 feet from the entrance to the parking garage.
Reserved
Reserved
Illuminated mirrors. Lighting shall be dedicated to the mirror.
Portable lighting in office areas includes under shelf or furniture-mounted supplemental task lighting qualifies when controlled by a time clock or an occupancy sensor.
Detailed task work – Lighting provides high level of visual acuity required for activities with close attention to small elements and/or extreme close up work.
Specialized task work – Lighting provides for small-scale, cognitive or fast performance visual tasks; lighting required for operating specialized equipment associated with pharmaceutical/laboratorial activities.
Precision specialized work – Lighting for work performed within a commercial or industrial environment that entails working with low contrast, finely detailed, or fast moving objects.
Tunable white luminaires capable of color change greater than or equal to 2000K CCT, or dim-to-warm luminaires capable of color change greater than or equal to 500K CCT, connected to controls that allows color changing of the luminaires.
Aging Eye/Low-vision areas can be documented as being designed to comply with the light levels in ANSI/IES RP-28 and are or will be licensed by local or state authorities for either senior long-term care, adult day care, senior support, and/or people with special visual needs.
Transition lighting OFF at night. Lighting power controlled by astronomical time clock or other control to shut off lighting at night. Additional LPD only applies to area within 30 feet of an exit. Not applicable to lighting in daylit zones.
Class I Facility is used for competition play for 5000 or more spectators. Class II Facility is used for competition play for up to 5000 spectators. Class III Facility is used for competition play for up to 2000 spectators. Class IV Facility is normally used for recreational play and there is limited or no provision for spectators.
The additional videoconferencing lighting power shall be allowed provided the videoconferencing studio meets all the requirements of Section 140.6(c)2Gvii.

TABLE 140.6-D TAILORED METHOD LIGHTING POWER ALLOWANCES
1	2	3	4	5	
Primary Function Area	General Illumination Level (Lux)	Wall Display Lighting Power Density (W/ft)	Allowed Combined Floor Display Power and Task Lighting Power Density (W/ft²)	Allowed Decorative/ Special Effect Lighting
Power Density (W/ft²)	
Auditorium Area	300	3.00	0.20	0.35	
Convention, Conference, Multipurpose, and Meeting Center Areas	300	2.00	0.30	0.35	
Dining Areas	200	1.25	0.45	0.35	
Exhibit, Museum Areas	150	11.20	0.70	0.35	
Hotel Area:					
Ballroom/Events	400	1.80	0.12	0.35	
Lobby	200	3.40	0.20	0.35	
Lobby, Main entry	200	3.40	0.20	0.35	
Religious Worship Area	300	1.30	0.40	0.35	
Retail Sales					
Grocery	600	6.60	0.60	0.35	
Merchandise Sales, and Showroom Areas	500	11.50	0.70	0.35	
Theater Area:					
Motion picture	200	2.00	0.20	0.35	
Performance Arts	200	7.30	0.20	0.35	

TABLE 140.6-E TAILORED WALL AND FLOOR DISPLAY MOUNTING HEIGHT ADJUSTMENT FACTORS
Height in feet above finished floor and bottom of luminaire(s)	Floor Display or Wall Display Mounting Height Adjustment Factor	
≤ 10’-6”	1.00	
> 10’-6” to 14’-0”	0.85	
>14’-0” to 18’-0”	0.75	
> 18’-0”	0.70	

TABLE 140.6-F	ROOM CAVITY RATIO (RCR) EQUATIONS

Determine the Room Cavity Ratio for TABLE 140.6-G using one of the following equations.	
Room cavity ratio for rectangular rooms
RCR  5  H  (L  W )	

L W
Room cavity ratio for irregular-shaped rooms
RCR  2.5 H  P	

A
Where: L =Length of room; W = Width of room; H =Vertical distance from the work plane to the centerline of the lighting fixture; P = Perimeter of room, and A = Area of room	

TABLE 140.6-G	TAILORED METHOD GENERAL LIGHTING POWER ALLOWED – BY ILLUMINANCE AND ROOM CAVITY RATIO
General Lighting Power Density (W/ft²) for the following RCR valuesb
General Illuminance Level
(lux)a	RCR ≤ 2.0	RCR > 2.0 and ≤ 3.5	RCR > 3.5 and ≤ 7.0	RCR > 7.0	
150	0.35	0.40	0.50	0.65	
200	0.40	0.50	0.65	0.85	
300	0.55	0.70	0.85	1.20	
400	0.65	0.80	1.05	1.25	
500	0.80	0.90	1.25	1.55	
600	0.90	1.05	1.40	2.00	
a Illuminance values from Column 2 of TABLE 140.6-D.
b RCR values are calculated using applicable equations in TABLE 140.6-F.

Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and 25943, Public Resources Code.

SECTION 140.7 – PRESCRIPTIVE REQUIREMENTS FOR OUTDOOR LIGHTING
(a) An outdoor lighting installation complies with this section if it meets the requirements in Subsections (b) and (c), and the actual outdoor lighting power installed is no greater than the allowed outdoor lighting power calculated under Subsection (d). The allowed outdoor lighting shall be calculated according to outdoor lighting zone in Title 24, Part 1, Section 10-114.
Exceptions to Section 140.7(a): When more than 50 percent of the light from a luminaire falls within one or more of the following applications, the lighting power for that luminaire shall be exempt from Section 140.7:
Temporary outdoor lighting.
Lighting required and regulated by the Federal Aviation Administration, and the Coast Guard.
Lighting for public streets, roadways, highways and traffic signage lighting, including lighting for driveway entrances occurring in the public right-of-way.
Lighting for sports and athletic fields, and children’s playgrounds.
Lighting for industrial sites, including but not limited to, rail yards, maritime shipyards and docks, piers and marinas, chemical and petroleum processing plants, and aviation facilities.
Lighting of public monuments.
Lighting of signs complying with the requirements of Sections 130.3 and 140.8.
Lighting of tunnels, bridges, stairs, wheelchair elevator lifts for American with Disabilities Act (ADA) compliance, and ramps that are other than parking garage ramps.
Landscape lighting.
In theme parks: outdoor lighting only for themes and special effects.
Lighting for outdoor theatrical and other outdoor live performances, provided that these lighting systems are additions to area lighting systems and are controlled by a multiscene or theatrical cross-fade control station accessible only to authorized operators.
Outdoor lighting systems for qualified historic buildings, as defined in the California Historic Building Code (Title 24, Part 8), if they consist solely of historic lighting components or replicas of historic lighting components. If lighting systems for qualified historic buildings contain some historic lighting components or replicas of historic components, combined with other lighting components, only those historic or historic replica components are exempt. All other outdoor lighting systems for qualified historic buildings shall comply with Section 140.7.
Outdoor lighting power trade-offs. Outdoor lighting power trade-offs shall be determined as follows:
Allowed lighting power determined according to Section 140.7(d)1 for general hardscape lighting allowance may be traded to specific applications in Section 140.7(d)2, provided the hardscape area from which the lighting power is traded continues to be illuminated in accordance with Section 140.7(d)1A.
Allowed lighting power determined according to Section 140.7(d)2 for additional lighting power allowances for specific applications shall not be traded between specific applications, or to hardscape lighting in Section 140.7(d)1.
Trading of lighting power allowances between outdoor and indoor areas shall not be permitted.
Calculation of actual lighting power. The wattage of outdoor luminaires shall be determined in accordance with Section 130.0(c).
Calculation of allowed lighting power. The allowed lighting power shall be the combined total of the sum of the general hardscape lighting allowance determined in accordance with Section 140.7(d)1, and the sum of the additional lighting power allowance for specific applications determined in accordance with Section 140.7(d)2.

General hardscape lighting allowance. Determine the general hardscape lighting power allowances as follows:
The general hardscape area of a site shall include parking lot(s), roadway(s), driveway(s), sidewalk(s), walkway(s), bikeway(s), plaza(s), bridge(s), tunnel(s), and other improved area(s) that are illuminated. In plan view of the site, determine the illuminated hardscape area, which is defined as any hardscape area that is within a square pattern around each luminaire or pole that is ten times the luminaire mounting height with the luminaire in the middle of the pattern, less any areas that are within a building, beyond the hardscape area, beyond property lines or obstructed by a structure. The illuminated hardscape area shall include portions of planters and landscaped areas that are within the lighting application and are less than or equal to 10 feet wide in the short dimensions and are enclosed by hardscape or other improvement on at least three sides. Multiply the illuminated hardscape area by the area wattage allowance (AWA) from Table 140.7-A for the appropriate lighting zone.
Determine the perimeter length of the general hardscape area. The total perimeter shall not include portions of hardscape that are not illuminated according to Section 140.7(d)1A. Multiply the hardscape perimeter by the linear wattage allowance (LWA) for hardscape from Table 140.7-A for the appropriate lighting zone. The perimeter length for hardscape around landscaped areas and permanent planters shall be determined as follows:
Landscaped areas completely enclosed within the hardscape area, and which have a width or length less than 10 feet wide, shall not be added to the hardscape perimeter length.
Landscaped areas completely enclosed within the hardscape area, and which width or length is a minimum of 10 feet wide, the perimeter of the landscaped areas or permanent planter shall be added to the hardscape perimeter length.
Landscaped edges that are not abutting the hardscape shall not be added to the hardscape perimeter length.
Determine the Initial Wattage Allowance (IWA) for general hardscape lighting from Table 140.7-A for the appropriate lighting zone. The hardscape area shall be permitted one IWA per site.
The general hardscape lighting allowance shall be the sum of the allowed watts determined from (A),
(B) and (C) above.
Additional lighting power allowance for specific applications. Additional lighting power for specific applications shall be the smaller of the additional lighting allowances for specific applications determined in accordance with Table 140.7-B for the appropriate lighting zone, or the actual installed lighting power meeting the requirements for the allowance.

TABLE 140.7-A GENERAL HARDSCAPE LIGHTING POWER ALLOWANCE

Type of Power Allowance	Lighting Zone 03	Lighting Zone 13	Lighting Zone 23	Lighting Zone 33	Lighting Zone 43	
Area Wattage Allowance (AWA)	No allowance1	0.016 W/ft²	0.019 W/ft²	0.021 W/ft²	0.024 W/ft²	
Linear Wattage Allowance (LWA)	No allowance1	0.13 W/lf	0.15 W/lf	0.20 W/lf	0.29 W/lf	
Initial Wattage Allowance (IWA)	No allowance1	150 W	200 W	250 W	320 W	
1 Continuous lighting is explicitly prohibited in Lighting Zone 0. A single luminaire of 15 Watts or less may be installed at an entrance to a parking area, trail head, fee payment kiosk, outhouse, or toilet facility, as required to provide safe navigation of the site infrastructure. Luminaires installed shall meet the maximum zonal lumen limits as specified in Section 130.2(b).
2 RESERVED.
3 Narrow band spectrum light sources with a dominant peak wavelength greater than 580 nm – as mandated by local, state, or federal agencies to minimize the impact on local, active professional astronomy or nocturnal habitat of specific local fauna – shall be allowed a 2.0 lighting power allowance multiplier.

.

Lighting Application	Lighting Zone 0	Lighting Zone 1	Lighting Zone 2	Lighting Zone 3	Lighting Zone 4	
	WATTAGE ALLOWANCE PER APPLICATION. Use all that apply as appropriate.	
Building Entrances or Exits. Allowance per door. Luminaires qualifying for this allowance shall be within 20 feet of the door.	Not applicable	9
watts	15
watts	19
watts	21
watts	
Primary Entrances to Senior Care Facilities, Police Stations, Healthcare Facilities, Fire Stations, and Emergency Vehicle Facilities. Allowance per primary entrance(s) only. Primary entrances shall provide access for the general public and shall not be used exclusively for staff or service personnel. This allowance shall be in addition to the building entrance or exit allowance above. Luminaires qualifying for this allowance shall be within 100 feet of the primary entrance.	Not applicable	20
watts	40
watts	57
watts	60
watts	
Drive Up Windows. Allowance per customer service location. Luminaires qualifying for this allowance shall be within 2 mounting heights of the sill of the window.	Not applicable	16
watts	30
watts	50
watts	75
watts	
Vehicle Service Station Uncovered Fuel Dispenser. Allowance per fueling dispenser. Luminaires qualifying for this allowance shall be within 2 mounting heights of the dispenser.	Not applicable	55
watts	77
watts	81
watts	135
watts	
ATM Machine Lighting. Allowance per ATM machine. Luminaires qualifying for this allowance shall be within 50 feet of the dispenser.	Not applicable	100 watts for first ATM machine, 35 watts for each additional ATM machine.	
WATTAGE ALLOWANCE PER UNIT LENGTH (w/linear ft). May be used for one or two frontage side(s) per site.	
Outdoor Sales Frontage. Allowance for frontage immediately adjacent to the principal viewing location(s) and unobstructed for its viewing length. A corner sales lot may include two adjacent sides provided that a different principal viewing location exists for each side. Luminaires qualifying for this allowance shall be located between the principal viewing location and the frontage outdoor sales area.	Not applicable	No Allowance	11
W/linear ft	19
W/linear ft	25
W/linear ft	
WATTAGE ALLOWANCE PER HARDSCAPE AREA (W/ft²). May be used for any illuminated hardscape area on the site.	
Hardscape Ornamental Lighting. Allowance for the total site illuminated hardscape area. Luminaires qualifying for this allowance shall be rated for 50 watts or less as determined in accordance with Section 130.0(c), and shall be post-top luminaires, lanterns, pendant luminaires, or chandeliers.	Not applicable	No Allowance	0.007
W/ft²	0.013
W/ft²	0.019
W/ft²	
WATTAGE ALLOWANCE PER SPECIFIC AREA (W/ft²). Use as appropriate provided that none of the following specific applications shall be used for the same area.	
Building Facades. Only areas of building façade that are illuminated shall qualify for this allowance. Luminaires qualifying for this allowance shall be aimed at the façade and shall be capable of illuminating it without obstruction or interference by permanent building features or other objects.	Not applicable	No Allowance	0.100
W/ft²	0.170
W/ft²	0.225
W/ft²	
Outdoor Sales Lots. Allowance for uncovered sales lots used exclusively for the display of vehicles or other merchandise for sale. Driveways, parking lots or other non-sales areas shall be considered hardscape areas even if these areas are completely surrounded by sales lot on all sides. Luminaires qualifying for this allowance shall be within 5 mounting heights of the sales lot area.	Not applicable	0.060
W/ft²	0.210
W/ft²	0.280
W/ft²	0.485
W/ft²	
Vehicle Service Station Hardscape. Allowance for the total illuminated hardscape area less area of buildings, under canopies, off property, or obstructed by signs or structures. Luminaires qualifying for this allowance shall be illuminating the hardscape area and shall not be within a building, below a canopy, beyond property lines, or obstructed by a sign or other structure.	Not applicable	0.006
W/ft²	0.068
W/ft²	0.138
W/ft²	0.200
W/ft²	
Vehicle Service Station Canopies. Allowance for the total area within the drip line of the canopy. Luminaires qualifying for this allowance shall be located under the canopy.	Not applicable	0.220
W/ft²	0.430
W/ft²	0.580
W/ft²	1.010
W/ft²	

Sales Canopies. Allowance for the total area within the drip line of the canopy. Luminaires qualifying for this allowance shall be located under the canopy.	Not applicable	No Allowance	0.470
W/ft²	0.622
W/ft²	0.740
W/ft²	
Non-sales Canopies and Tunnels. Allowance for the total area within the drip line of the canopy or inside the tunnel. Luminaires qualifying for this allowance shall be located under the canopy or tunnel.	Not applicable	0.057
W/ft²	0.137
W/ft²	0.270
W/ft²	0.370
W/ft²	
Guard Stations. Allowance up to 1,000 square feet per vehicle lane. Guard stations provide access to secure areas controlled by security personnel who stop and may inspect vehicles and vehicle occupants, including identification, documentation, vehicle license plates, and vehicle contents. Qualifying luminaires shall be within 2 mounting heights of a vehicle lane or the guardhouse.	Not applicable	0.081
W/ft²	0.176
W/ft²	0.325
W/ft²	0.425
W/ft²	
Student Pick-up/Drop-off zone. Allowance for the area of the student pick-up/drop-off zone, with or without canopy, for preschool through 12th grade school campuses. A student pick-up/drop off zone is a curbside, controlled traffic area on a school campus where students are picked-up and dropped off from vehicles. The allowed area shall be the smaller of the actual width or 25 feet, times the smaller of the actual length or 250 feet. Qualifying luminaires shall be within 2 mounting heights of the student pick-up/drop-off zone.	Not applicable	No Allowance	0.056
W/ft²	0.200
W/ft²	No Allowance	
Outdoor Dining. Allowance for the total illuminated hardscape of outdoor dining. Outdoor dining areas are hardscape areas used to serve and consume food and beverages. Qualifying luminaires shall be within 2 mounting heights of the hardscape area of outdoor dining.	Not applicable	0.004
W/ft²	0.030
W/ft²	0.050
W/ft²	0.075
W/ft²	
Special Security Lighting for Retail Parking and Pedestrian Hardscape. This additional allowance is for illuminated retail parking and pedestrian hardscape identified as having special security needs. This allowance shall be in addition to the building entrance or exit allowance.	Not applicable	0.004
W/ft²	0.005
W/ft²	0.010
W/ft²	No Allowance	
Security Cameras. This additional allowance is for illuminated general hardscape area. This allowance shall apply when a security camera is installed within 2 mounting heights of the general hardscape area and mounted more than 10 feet away from a building.	Not applicable	No Allowance	0.018
W/ft²	0.018
W/ft²	0.018
W/ft²	

NOTE: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and 25943, Public Resources Code.

SECTION 140.8 – PRESCRIPTIVE REQUIREMENTS FOR SIGNS
This section applies to all internally illuminated and externally illuminated signs, unfiltered light emitting diodes (LEDs), and unfiltered neon, both indoor and outdoor. Each sign shall comply with either Subsection (a) or (b), as applicable.
Maximum allowed lighting power.
For internally illuminated signs, the maximum allowed lighting power shall not exceed the product of the illuminated sign area and 12 watts per square foot. For double-faced signs, only the area of a single face shall be used to determine the allowed lighting power.
For externally illuminated signs, the maximum allowed lighting power shall not exceed the product of the illuminated sign area and 2.3 watts per square foot. Only areas of an externally lighted sign that are illuminated without obstruction or interference, by one or more luminaires, shall be used.
Lighting for unfiltered light emitting diodes (LEDs) and unfiltered neon shall comply with Section 140.8(b).
Alternate lighting sources. The sign shall be equipped with one or more of the following light sources:
High pressure sodium lamps; or
Metal halide lamps that are:
Pulse start or ceramic served by a ballast that has a minimum efficiency of 88 percent or greater, or
Pulse start that are 320 watts or smaller, are not 250 watt or 175 watt lamps, and are served by a ballast that has a minimum efficiency of 80 percent.
Ballast efficiency is the reference lamp power divided by the ballast input power when tested according to ANSI C82.6-2015.
Neon or cold cathode lamps with transformer or power supply efficiency greater than or equal to the following:
A minimum efficiency of 75 percent when the transformer or power supply rated output current is less than 50 mA; or
A minimum efficiency of 68 percent when the transformer or power supply rated output current is 50 mA or greater.
The ratio of the output wattage to the input wattage is at 100 percent tubing load.
Fluorescent lighting systems meeting one of the following requirements:
Use only lamps with a minimum color rendering index (CRI) of 80; or
Use only electronic ballasts with a fundamental output frequency not less than 20 kHz.
Light emitting diodes (LEDs) with a power supply having an efficiency of 80 percent or greater; or
Exception to Section 140.8(b)5: Single voltage external power supplies that are designed to convert 120 volt AC input into lower voltage DC or AC output, and have a nameplate output power less than or equal to 250 watts, shall comply with the applicable requirements of the appliance efficiency regulations Appliance Efficiency Regulations (Title 20).
Compact fluorescent lamps that do not contain a medium screw base socket (E24/E26).
Exception 1 to Section 140.8: Unfiltered incandescent lamps that are not part of an electronic message center (EMC), an internally illuminated sign or an externally illuminated sign.
Exception 2 to Section 140.8: Exit signs. Exit signs shall meet the requirements of the Appliance Efficiency Regulations.
Exception 3 to Section 140.8: Traffic Signs. Traffic signs shall meet the requirements of the Appliance Efficiency Regulations.

Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and 25943, Public Resources Code.

SECTION 140.9 – PRESCRIPTIVE REQUIREMENTS FOR COVERED PROCESSES
Prescriptive Requirements for Computer Rooms. Computer rooms with a power density greater than 20 W/ft2 shall comply with this section.
Economizers. Each individual cooling system primarily serving computer rooms shall include either:
An integrated air economizer capable of providing partial cooling even when additional mechanical cooling is required and capable of providing 100 percent of the expected system cooling load at 65°F to 80.6°F supply air temperature at outside air temperatures of 65°F dry-bulb and below or 50°F wet- bulb and below, and be equipped with a fault detection and diagnostic system as specified by Section 120.2(i); or
An integrated water economizer capable of providing partial cooling even when additional mechanical cooling is required and capable of providing 100 percent of the expected system cooling load at 65°F to 80.6°F supply air temperature at outside air temperatures of 50°F dry-bulb and below or 45°F wet- bulb and below.
EXCEPTION 1 to Section 140.9(a)1: Individual computer rooms with an ITE design load under 5 tons (18 kW) in a building that does not have any economizers.
EXCEPTION 2 to Section 140.9(a)1: A computer room with an ITE design load less than 20 tons (70 kW) may be served by a second fan system without an economizer if it is also served by a fan system with an economizer that also serves other spaces within the building, provided that all of the following are met:
The economizer system is sized to meet the design cooling load of the computer room when the other spaces within the building are at 50 percent of their design load at outside air temperatures of 65°F dry-bulb and below or 50°F wet-bulb and below; and
The economizer system has the ability to serve only the computer rooms connected to it, e.g., shut off flow to other spaces within the building when unoccupied.
Power Consumption of Fans. The total fan power at design conditions of each fan system shall not exceed 27 W/kBtu·h of net sensible cooling capacity.
Air Containment. Computer rooms with air-cooled computers in racks and with a ITE design load exceeding 10 kW (2.8 tons) per room shall include air barriers such that there is no significant air path for computer discharge air to recirculate back to computer inlets without passing through a cooling system.
EXCEPTION 1 to Section 140.9(a)3: Expansions of existing computer rooms.
EXCEPTION 2 to Section 140.9(a)3: Computer racks with a design load less than 1 kW (0.28 tons) per rack.
EXCEPTION 3 to Section 140.9(a)3: Equivalent energy performance based on computational fluid dynamics or other analysis.
Alternating Current-Output Uninterruptible Power Supplies (UPS). Alternating current-output UPS systems serving a computer room shall meet or exceed minimum average efficiencies in Table 140.9-B. Minimum average efficiency for alternating current-output UPS shall meet or exceed calculation and testing requirements identified in ENERGY STAR Program Requirements for Uninterruptible Power Supplies (UPSs) – Eligibility Criteria Version 2.0.
where:
P is the rated output power in watts (W).
EMOD is an allowance of 0.004 for modular UPSs applicable in the commercial 1,500-10,000 W range. ln is the natural logarithm.
The requirement shall be rounded to the third decimal place for certification and reporting.
Exception to Section 140.9(a)4: Alternating current-output UPS that utilizes standardized NEMA 1-15P or NEMA 5-15P input plug, as specified in ANSI/NEMA WD-6-2016.

Table 140.9-B Alternating Current-Output Uninterruptible Power Supply Minimum Average Efficiency
	Voltage and Frequency Dependent	Voltage Independent	Voltage and Frequency Independent	
P≤350 W	5.71 x 10-5 x P + 0.962	5.71 x 10-5 x P + 0.964	0.011 x ln(P) + 0.824	
350 W<P≤1,500 W	0.982	0.984	0.011 x ln(P) + 0.824	
1,500 W<P≤10,000 W	0.981 – EMOD	0.980 – EMOD	0.0145 x ln(P) +0.800 – EMOD	
P>10,000 W	0.970	0.940	0.0058 x ln(P) + 0.886	
Prescriptive requirements for commercial kitchens.
Kitchen exhaust systems.
Replacement air introduced directly into the hood cavity of kitchen exhaust hoods shall not exceed 10 percent of the hood exhaust airflow rate.
For kitchen/dining facilities having total Type I and Type II kitchen hood exhaust airflow rates greater than 5,000 cfm, each Type I hood shall have an exhaust rate that complies with Table 140.9-C. If a single hood or hood section is installed over appliances with different duty ratings, then the maximum allowable flow rate for the hood or hood section shall not exceed the Table 140.9-A values for the highest appliance duty rating under the hood or hood section. Refer to ASHRAE Standard 154-2011 for definitions of hood type, appliance duty and next exhaust flow rate.
Exception 1 to Section 140.9(b)1B: 75 percent of the total Type I and Type II exhaust replacement air is transfer air that would otherwise be exhausted.
Exception 2 to Section 140.9(b)1B: Existing hoods not being replaced as part of an addition or alteration.
TABLE 140.9-C MAXIMUM NET EXHAUST FLOW RATE, CFM PER LINEAR FOOT OF HOOD LENGTH
Type of Hood	Light Duty Equipment	Medium Duty Equipment	Heavy Duty Equipment	Extra Heavy Duty Equipment	
Wall-mounted Canopy	140	210	280	385	
Single Island	280	350	420	490	
Double Island	175	210	280	385	
Eyebrow	175	175	Not Allowed	Not Allowed	
Backshelf / Passover	210	210	280	Not Allowed	
Kitchen ventilation.
Mechanically cooled or heated makeup air delivered to any space with a kitchen hood shall not exceed the greater of:
The supply flow required to meet the space heating and cooling load; or
The hood exhaust flow minus the available transfer air from adjacent spaces. Available transfer air is that portion of outdoor ventilation air serving adjacent spaces not required to satisfy other exhaust needs, such as restrooms, not required to maintain pressurization of adjacent spaces, and that would otherwise be relieved from the building.
Exception to Section 140.9(b)2A: Existing kitchen makeup air units not being replaced as part of an addition or alteration.
A kitchen/dining facility having a total Type I and Type II kitchen hood exhaust airflow rate greater than 5,000 cfm shall have one of the following:
At least 50 percent of all replacement air is transfer air that would otherwise be exhausted; or
Demand ventilation system(s) on at least 75 percent of the exhaust air. Such systems shall:

Include controls necessary to modulate airflow in response to appliance operation and to maintain full capture and containment of smoke, effluent and combustion products during cooking and idle; and
Include failsafe controls that result in full flow upon cooking sensor failure; and
Include an adjustable timed override to allow occupants the ability to temporarily override the system to full flow; and
Be capable of reducing exhaust and replacement air system airflow rates to the larger of:
50 percent of the total design exhaust and replacement air system airflow rates; or
The ventilation rate required as specified by Section 120.1(c)3.
Listed energy recovery devices with a sensible heat recovery effectiveness of not less than 40 percent on at least 50 percent of the total exhaust airflow; or
A minimum of 75 percent of makeup air volume that is:
Unheated or heated to no more than 60°F; and
Uncooled or cooled without the use of mechanical cooling.
Exception to Section 140.9(b)2B: Existing hoods not being replaced as part of an addition or alteration.
Kitchen exhaust system acceptance. Before an occupancy permit is granted for a commercial kitchen subject to Section 140.9(b), the following equipment and systems shall be certified as meeting the acceptance requirements for code compliance, as specified by the Reference Nonresidential Appendix NA7. A certificate of acceptance shall be submitted to the enforcement agency that certifies that the equipment and systems meet the acceptance requirements specified in NA7.11.
Exception to Section 140.9(b): healthcare facilities.
Prescriptive requirements for laboratory and factory exhaust systems.
Airflow reduction requirements. For buildings with laboratory exhaust systems where the minimum circulation rate to comply with code or accreditation standards is 10 ACH or less, the design exhaust airflow shall be capable of reducing zone exhaust and makeup airflow rates to the regulated minimum circulation rate, or the minimum required to maintain pressurization requirements, whichever is larger. Variable exhaust and makeup airflow shall be coordinated to achieve the required space pressurization at varied levels of demand and fan system capacity.
Exception 1 to Section 140.9(c)1: Laboratory exhaust systems serving zones where constant volume is required by the authority having jurisdiction, facility environmental health & safety department or other applicable code.
Exception 2 to Section 140.9(c)1: New zones on an existing constant volume exhaust system.
Exhaust System Transfer Air. Conditioned supply air delivered to any space with mechanical exhaust shall comply with the requirements of Section 140.4(o).
Fan System Power Consumption. All newly installed fan exhaust systems serving a laboratory or factory greater than 10,000 cfm shall meet Subsection A and either B, C, or D:
System shall meet all discharge requirements in ANSI Z9.5-2012.
The exhaust fan system power shall not exceed 0.85 watts per cfm of exhaust air for systems with air filtration, scrubbers, or other air treatment devices. For all other exhaust fan systems the system power shall not exceed 0.65 watts per cfm of exhaust air. Exhaust fan system power equals the sum of the power of all fans in the exhaust system that are required to operate at normal occupied design conditions in order to exhaust air from the conditioned space to the outdoors. Exhaust air does not

include entrained air, but does include all exhaust air from fume hoods, hazardous exhaust flows, or other manifolded exhaust streams.
Exception to Section 140.9(c)3B: Laboratory exhaust systems where applicable local, state, or federal exhaust treatment requirements specify installation of air treatment devices that cause more than 1 in. of water pressure drop.
The volume flow rate at the stack shall vary based on the measured 5-minute averaged wind speed and wind direction obtained from a calibrated local anemometer.
At least one sonic anemometer or at least two anemometers of other types shall be installed in a location that experiences similar wind conditions to the free stream environment above the exhaust stacks and be at a height that is outside the wake region of nearby structures.
Look-up tables shall be used to define the required exhaust volume flow rate, as a function of at least eight wind speeds and eight wind directions, to maintain downwind concentrations below health and odor limits, as defined by the 2018 American Conference of Governmental Industrial Hygienists Threshold Limit Values and Biological Exposure Indices, for all contaminants, or as defined by applicable local, state, or federal jurisdictions, if more stringent.
Wind speed/direction sensors shall be certified by the manufacturer to be accurate within plus or minus 40 fpm (0.2 m/s) and 5.0 degrees when measured at sea level and 25°C, factory calibrated, and certified by the manufacturer to require calibration no more frequently than once every 5 years.
Upon detection of anemometer and/or signal failure, the system shall reset the exhaust volume flow rate to the value needed to maintain downwind concentrations below health and odor limits for all contaminants at worst-case wind conditions and shall report the fault to an Energy Management Control System (EMCS) or fault management application which automatically provides notification of the fault to a remote system provider. The EMCS or fault management system shall log the error and the time when it occurred. The system shall have logic that automatically checks for anemometer failure by the following means.
If any anemometer has not been calibrated within the manufacturer’s recommended calibration period, the anemometer has failed.
During unoccupied periods the system compares the readings of all anemometers. If any anemometer is more than 30% above or below the average reading for a period of 4 hours, the anemometer has failed.
Wind speed and wind direction readings shall be sampled at least 10 times per minute. If the difference between the maximum and minimum readings from the average of either the wind direction or the wind speed over a one minute period is less than 10% of the average value, the measurements shall be considered a signal failure.
Other error signals sent by the anemometer.
Before an occupancy permit is granted for a laboratory or process facility subject to Section 140.9(c)3C, the applicable equipment and systems shall be certified as meeting the Acceptance Requirements for Code Compliance, as specified by the Reference Nonresidential Appendix NA7.16. A Certificate of Acceptance shall be submitted to the enforcement agency that certifies that the equipment and systems meet the acceptance requirements specified in NA7.16.
The volume flow rate at the stack shall vary based on the measured contaminant concentration in the exhaust plenum from a calibrated contaminant sensor installed within each exhaust plenum.
A contaminant-event threshold shall be established based on maintaining downwind concentrations below health and odor limits for all chemicals at worst-case wind conditions, as defined by the 2018 American Conference of Governmental Industrial Hygienists Threshold Limit Values and Biological Exposure Indices, or as defined by applicable local, state, or federal jurisdictions, if more stringent.

At least two contaminant concentration sensors shall be Photo Ionization Detectors (PID) certified by the manufacturer to be accurate within plus or minus 5% when measured at sea level and 25°C, factory calibrated, and certified by the manufacturer to require calibration no more frequently than once every 6 months.
Upon detection of sensor and/or signal failure, the system shall reset the exhaust volume flow rate to the value needed to maintain downwind concentrations below health and odor limits for all contaminants at worst-case wind conditions and shall report the fault to an Energy Management Control System or fault management application which automatically provides notification of the fault to a remote system provider. The system shall have logic that automatically checks for sensor failure by the following means.
If any sensor has not been calibrated within the manufacturer’s recommended calibration period, the sensor has failed.
During unoccupied periods the system compares the readings of all sensors. If any sensor is more than 30% above or below the average reading for a period of 4 hours, the sensor has failed.
Before an occupancy permit is granted for a laboratory or process facility subject to Section 140.9(c)3D, the applicable equipment and systems shall be certified as meeting the Acceptance Requirements for Code Compliance, as specified by the Reference Nonresidential Appendix NA7.16. A Certificate of Acceptance shall be submitted to the enforcement agency that certifies that the equipment and systems meet the acceptance requirements specified in NA7.16.
Fume Hood Automatic Sash Closure. Variable air volume laboratory fume hoods with vertical only sashes located in fume hood intensive laboratories, as described in Table 140.9-D, shall have an automatic sash closure system that complies with the following:
The automatic sash closure system shall be capable of the following:
The automatic sash closure system shall have a dedicated zone presence sensor that detects people in the area near the fume hood sash and automatically closes the sash within 5 minutes of no detection.
The automatic sash closure system shall have controls to prevent the sash from automatic closing when a force of no more than 10 lbs is detected.
The automatic sash closure system shall be equipped with an obstruction sensor that prevents the sash from automatic closing with obstructions in the sash opening. Obstruction sensor shall be capable of sensing transparent materials such as laboratory glassware.
The automatic sash closure system shall be capable of being configured in a manual open mode where once the sash is closed, detection of people in the area near the fume hood by the zone presence sensor does not open the fume hood sash.
Fume Hood Automatic Sash Closure Acceptance. Before an occupancy permit is granted for the fume hoods subject to 140.9(c)4, the equipment and systems shall be certified as meeting the Acceptance Requirement for Code Compliance as specified by the Reference Nonresidential Appendix NA7. A Certificate of Acceptance shall be submitted to the enforcement agency that certifies that the equipment and systems meet the acceptance requirements specified in NA7.17.
Table 140.9-D Fume Hood Intensive Laboratories
Occupied Minimum Ventilation ACH	≤ 4	> 4 and ≤ 6	> 6 and ≤ 8	> 8 and ≤ 10	> 10 and ≤ 12	> 12 and ≤ 14	
Hood Density (linear feet per 10,000 ft3 of
laboratory space	≥ 6	≥ 8	≥ 10	≥ 12	≥ 14	≥ 16	
Exception to Section 140.9(c): healthcare facilities.

Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.8, and 25943, Public Resources Code.

SECTION 140.10 – PRESCRIPTIVE REQUIREMENTS FOR PHOTOVOLTAIC AND BATTERY STORAGE SYSTEMS

Photovoltaic requirements. All newly constructed building types specified in Table 140.10-A, or mixed occupancy buildings where one or more of these building types constitute at least 80 percent of the floor area of the building, shall have a newly installed photovoltaic (PV) system meeting the minimum qualification requirements of Reference Joint Appendix JA11. The PV size in kWdc shall be not less than the smaller of the PV system size determined by Equation 140.10-A, or the total of all available Solar Access Roof Areas (SARA) multiplied by 14 W/ft².
SARA includes the area of the building’s roof space capable of structurally supporting a PV system, and the area of all roof space on covered parking areas, carports and all other newly constructed structures on the site that are compatible with supporting a PV system per Title 24, Part 2, Section 1511.2.
SARA does NOT include:
Any area that has less than 70 percent annual solar access. Annual solar access is determined by dividing the total annual solar insolation (accounting for shading obstructions) by the total annual solar insolation if the same areas were unshaded by those obstructions. For all roofs, all obstructions, including those that are external to the building, and obstructions that are part of the building design and elevation features may be considered for the annual solar access calculations.
Occupied roofs as specified by CBC Section 503.1.4.
Roof space that is otherwise not available due to compliance with other building code requirements if confirmed by the Executive Director.
EQUATION 140.10-A PHOTOVOLTAIC DIRECT CURRENT SIZE

kWPVdc = (CFA x A)/1000
where:

kWPVdc	=	Size of the PV system in kW.	
CFA	=	Conditioned floor area in square feet.	
A	=	PV capacity factor specified in Table 140.10-A for the building type	
Where the building includes more than one of the space types listed in Table 140.10-A, the total PV system capacity for the building shall be determined by applying Equation 140.10-A to each of the listed space types and summing the capacities determined for each.
Exception 1 to Section 140.10(a). No PV system is required where the total of all available SARA is less than three percent of the conditioned floor area.
Exception 2 to Section 140.10(a). No PV system is required where the required PV system size is less than 4 kWdc.
Exception 3 to Section 140.10(a). No PV system is required if the SARA contains less than 80 contiguous square feet.
Exception 4 to Section 140.10(a). Buildings with enforcement-authority-approved roof designs, where the enforcement authority determines it is not possible for the PV system, including panels, modules, components, supports and attachments to the roof structure, to meet ASCE 7-16, Chapter 7, Snow Loads.
Exception 5 to Section 140.10(a). Multitenant buildings in areas where a load-serving entity does not provide either a virtual net metering (VNEM) or community solar program.

Battery storage system requirements. All buildings that are required by Section 140.10(a) to have a PV system shall also have a battery storage system meeting the minimum qualification requirements of Reference Joint Appendix JA12. The rated energy capacity and the rated power capacity shall be not less than the values determined by Equation 140.10-B and Equation 140.10-C. Where the building includes more than one of the space types listed in Table 140.10-B, the total battery system capacity for the building shall be determined by applying Equations 140.10-B and 140.10-C to each of the listed space types and summing the capacities determined for each space type and equation.
EQUATION 140.10-B - BATTERY STORAGE RATED ENERGY CAPACITY
kWhbatt = kWPVdc × B / D0.5 where:
kWhbatt =  Rated useable energy capacity of the battery storage system in kWh.
kWPVdc  =  PV system capacity required by Section 140.10(a) in kWdc.
B	=	Battery energy capacity factor specified in Table 140.10-B for the building type.
D	= Rated single charge-discharge cycle AC to AC (round-trip) efficiency of the battery storage system.
EQUATION 140.10-C - BATTERY STORAGE RATED POWER CAPACITY
kWbatt = kWPVdc × C where:
kWbatt	=  Power capacity of the battery storage system in kWdc.
kWPVdc  =  PV system capacity required by Section 140.10(a) in kWdc.
C	=	Battery power capacity factor specified in Table 140.10-B for the building type.

Exception 1 to Section 140.10(b).: No battery storage system is required if the installed PV system size is less than 15 percent of the size determined by Equation 140.10-A.
Exception 2 to Section 140.10(b). No battery storage system is required in buildings with battery storage system requirements with less than 10 kWh rated capacity.
Exception 3 to Section 140.10(b). For multitenant buildings, the energy capacity and power capacity of the battery storage system shall be based on the tenant spaces with more than 5,000 square feet of conditioned floor area. For single-tenant buildings with less than 5,000 square feet of conditioned floor area, no battery storage system is required.
Exception 4 to Section 140.10(b). In Climate Zone 1, no battery storage system is required for offices, schools and warehouses.

Table 140.10-A – PV Capacity Factors
	Factor A – Minimum PV Capacity (W/ft² of conditioned floor area)	
Climate Zone	1, 3, 5, 16	2, 4, 6 -14	15	
Grocery	2.62	2.91	3.53	
High-Rise Multifamily	1.82	2.21	2.77	
Office, Financial Institutions, Unleased Tenant Space	2.59	3.13	3.80	
Retail	2.62	2.91	3.53	
School	1.27	1.63	2.46	
Warehouse	0.39	0.44	0.58	
Auditorium, Convention Center, Hotel/Motel, Library, Medical Office Building/Clinic, Restaurant, Theater	0.39	0.44	0.58	
Table 140.10-B – Battery Storage Capacity Factors
	Factor B – Energy Capacity	Factor C – Power Capacity	
Storage-to-PV Ratio	Wh/W	W/W	
Grocery	1.03	0.26	
High-Rise Multifamily	1.03	0.26	
Office, Financial Institutions, Unleased Tenant Space	1.68	0.42	
Retail	1.03	0.26	
School	1.87	0.46	
Warehouse	0.93	0.23	
Auditorium, Convention Center, Hotel/Motel, Library, Medical Office Building/Clinic, Restaurant, Theater	0.93	0.23	

NOTE: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.8 and 25943, Public Resources Code.

SUBCHAPTER 6
NONRESIDENTIAL, AND HOTEL/MOTEL OCCUPANCIES— ADDITIONS, ALTERATIONS, AND REPAIRS

SECTION 141.0 – ADDITIONS, ALTERATIONS, AND REPAIRS TO EXISTING NONRESIDENTIAL, AND HOTEL/MOTEL BUILDINGS, TO EXISTING OUTDOOR LIGHTING, AND TO INTERNALLY AND EXTERNALLY ILLUMINATED SIGNS
Additions, alterations, and repairs to existing nonresidential, and hotel/motel buildings, existing outdoor lighting for these occupancies, and internally and externally illuminated signs, shall meet the requirements specified in Sections
100.0 through 110.10, and 120.0 through 130.5 that are applicable to the building project, and either the performance compliance approach (energy budgets) in Section 141.0(a)2 (for additions) or 141.0(b)3 (for alterations), or the prescriptive compliance approach in Section 141.0(a)1 (for additions) or 141.0(b)2 (for alterations), for the Climate Zone in which the building is located. Climate zones are shown in FIGURE 100.1-A.
Covered process requirements for additions, alterations and repairs to existing nonresidential, and hotel/motel buildings are specified in Section 141.1.
Exception to Section 141.0: Alterations to healthcare facilities are not required to comply with this Section.
NOTES:
For alterations that change the occupancy classification of the building, the requirements specified in Section 141.0(b) apply to the occupancy after the alterations.
Relocation or moving of a relocatable public school building is not, by itself, considered an alteration for the purposes of Title 24, Part 6.
Additions. Additions shall meet either Item 1 or 2 below.
Prescriptive approach. The envelope and lighting of the addition; any newly installed space-conditioning system, electrical power distribution system, or water-heating system; any addition to an outdoor lighting system; and any new sign installed in conjunction with an indoor or outdoor addition shall meet the applicable requirements of Sections 110.0 through 120.7, 120.9 through 130.5, and 140.2 through 140.10.
Performance approach.
The envelope and indoor lighting in the conditioned space of the addition, and any newly installed space-conditioning system, electrical power distribution system, or water-heating system, shall meet the applicable requirements of Sections 110.0 through 120.7, 120.9 through 130.5; and
Either:
The addition alone shall comply with Section 140.1; or
Existing plus addition plus alteration. The standard design for existing plus addition, plus alteration energy use is the combination of the existing building’s unaltered components to remain, existing building altered components that are the more efficient, in TDV energy, of either the existing conditions, or the requirements of Section 141.0(b)2, plus the proposed addition's energy use meeting the requirements of Section 140.1. The proposed design energy use is the combination of the existing building’s unaltered components to remain and the altered component’s energy features, plus the proposed energy features of the addition.

Exception 1 to Section 141.0(a): When heating, cooling, or service water heating to an addition are provided by expanding existing systems, the existing systems and equipment need not comply with Sections 110.0 through 120.9, or Sections 140.4 through 140.5.
Exception2 to Section 141.0(a): Where an existing system with electric reheat is expanded by adding variable air volume (VAV) boxes to serve an addition, total electric reheat capacity may be expanded so that the total capacity does not exceed 150 percent of the existing installed electric heating capacity in any one permit, and the system need not comply with Section 140.4(g). Additional electric reheat capacity in excess of 150 percent of the existing installed electric heating capacity may be added subject to the requirements of Section 140.4(g).
Exception 3 to Section 141.0(a): Duct Sealing. When ducts are extended from an existing duct system to serve the addition, the existing duct system and the extended ducts shall meet the applicable requirements specified in Section 141.0(b)2D.
Exception 4 to Section 141.0(a): Additions that increase the area of the roof by 2,000 square feet or less are exempt from the requirements of Section 110.10.
Exception 5 to Section 141.0(a): A gas hot water boiler system with a total system input of at least 1 MMBtu/h but no more than 10 MMBtu/h added to an existing building is exempt from the requirements of 140.4(k)8.
Exception 6 to Section 141.0(a): A gas service water heating with a total system input of at least 1 MMBtu/h added to an existing building is exempt from the requirements of 140.5(c).
Exception 7 to Section 141.0(a): Section 140.4(a)2 shall not apply to new space conditioning systems or components.
Alterations. Alterations to components of existing nonresidential, hotel/motel, or relocatable public school buildings, including alterations made in conjunction with a change in building occupancy to a nonresidential, high-rise residential, or hotel/motel occupancy shall meet item 1, and either Item 2 or 3 below:
Mandatory Requirements. Altered components in a nonresidential, or hotel/motel building shall meet the minimum requirements in this Section.
Roof/Ceiling Insulation. The opaque portions of the roof/ceiling that separate conditioned spaces from unconditioned spaces or ambient air shall meet the requirements of Section 141.0(b)2Biii.
Wall Insulation. For the altered opaque portion of walls separating conditioned spaces from unconditioned spaces or ambient air shall meet the applicable requirements of Items 1 through 4 below:
Metal Building. A minimum of R-13 insulation between framing members, or the area-weighted average U-factor of the wall assembly shall not exceed U-0.113.
Metal Framed. A minimum of R-13 insulation between framing members, or the area-weighted average U-factor of the wall assembly shall not exceed U-0.217.
Wood Framed and Others. A minimum of R-11 insulation between framing members, or the area- weighted average U-factor of the wall assembly shall not exceed U-0.110.
Spandrel Panels and Glass Curtain Walls. A minimum of R-4, or the area-weighted average U- factor of the wall assembly shall not exceed U-0.280.
Exception to Section 141.0(b)1B: Light and heavy mass walls.
Floor Insulation. For the altered portion of raised floors that separate conditioned spaces from unconditioned spaces or ambient air shall meet the applicable requirements of Items 1 through 3 below:
Raised Framed Floors. A minimum of R-11 insulation between framing members, or the area- weighted average U-factor of the floor assembly shall not exceed the U-factor of U-0.071.
Raised Mass Floors in Hotel/Motel Guest Rooms. A minimum of R-6 insulation, or the area- weighted average U-factor of the floor assembly shall not exceed the U-factor of U-0.111.

Raised Mass Floors in Other Occupancies. No minimum U-factor requirement.
Fan Energy Index: New fan systems serving an existing building shall meet the requirements of Section 120.10.
Prescriptive approach. The altered components of the envelope, or space conditioning, lighting, electrical power distribution and water heating systems, and any newly installed equipment serving the alteration, shall meet the applicable requirements of Sections 110.0 through 110.9, Sections 120.0 through 120.6, and Sections 120.9 through 130.5.
Exception to Section 141.0(b)2: The requirements of Section 120.2(i) shall not apply to alterations of space-conditioning systems or components.
Fenestration alterations other than repair and those subject to Section 141.0(b)2 shall meet the requirements below:
Vertical fenestration alterations shall meet the requirements in Table 141.0-A.
Added vertical fenestration shall meet the requirements of TABLE 140.3-B, C, or D.
All altered or newly installed skylights shall meet the requirements of TABLE 140.3-B, C or D.
Exception 1 to Section 141.0(b)2Ai: In an alteration, where 150 square feet or less of the entire building's vertical fenestration is replaced, RSHGC and VT requirements of TABLE 141.0-A shall not apply.
Exception 2 to Section 141.0(b)2Aii: In an alteration, where 50 square feet or less of vertical fenestration is added, RSHGC and VT requirements of TABLE 140.3-B, C or D shall not apply.
Exception 3 to Section 141.0(b)2Aiii: In an alteration, where 50 square feet or less of skylight is added, SHGC and VT requirements of TABLE 140.3-B, C or D shall not apply.
NOTE: Glass replaced in an existing sash and frame or sashes replaced in an existing frame are considered repairs. In these cases, Section 141.0(c) requires that the replacement be at least equivalent to the original in performance.
Table 141.0-A Altered Vertical Fenestration Maximum U-Factor and Maximum RSHGC
Climate Zone	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	
U-factor	0.47	0.47	0.58	0.47	0.58	0.47	0.47	0.47	0.47	0.47	0.47	0.47	0.47	0.47	0.47	0.47	
RSHGC	0.41	0.31	0.41	0.31	0.41	0.31	0.31	0.31	0.31	0.31	0.31	0.31	0.31	0.31	0.31	0.41	
VT	See TABLE 140.3-B, C, and D for all Climate Zones	
Existing roofs of a nonresidential or hotel/motel building being replaced, recovered or recoated, as defined in Section 100.1(b) and Title 24, Part 2, Chapter 2, shall meet the requirements of Section 110.8(i). Roofs with more than 50 percent of the roof area or more than 2,000 square feet of roof, whichever is less, is being altered the requirements of i and ii below apply:
Roofing Products shall comply with requirements in Section 140.3(a)1A:
Exception 1 to Section 141.0(b)2Bi: An aged solar reflectance less than 0.63 is allowed for low- sloped roofs provided the maximum roof/ceiling U-factor in TABLE 141.0-B is not exceeded.
Exception 2 to Sections 141.0(b)2Bi: Roof area covered by building integrated photovoltaic panels and building integrated solar thermal panels are not required to meet the minimum requirements for solar reflectance, thermal emittance, or SRI.

EXCEPTION 3 to Sections 141.0(b)2Bi: Roof constructions with a weight of at least 25 lb/ft² are not required to meet the minimum requirements for solar reflectance, thermal emittance, or SRI.
Table 141.0-B Roof/Ceiling Insulation Tradeoff for Low-Sloped Aged Solar Reflectance
Aged Solar Reflectance	Climate Zones
6, 7, & 8
U-factor	All Other Climate Zones U-factor	
0.62- 0.60	0.043	0.035	
0.59-0.55	0.041	0.034	
0.54-0.50	0.038	0.031	
0.49-0.45	0.034	0.029	
0.44-0.40	0.032	0.028	
0.39-0.35	0.029	0.026	
0.34-0.30	0.028	0.025	
0.29-0.25	0.026	0.024	
Roof/ceiling insulation. For low-sloped roofs, the area of the roof recover or roof replacement shall be insulated to the level specified in Table 141.0-C.
Exception 1 to Section 141.0(b)2Bii: Roof recovers with new R-10 insulation added above deck do not need to be insulated to the level specified in Table 141.0-C.
Exception 2 to Section 141.0(b)2Bii: When existing mechanical equipment located on the roof will not be disconnected and lifted, insulation added is the greater of R-10 or the maximum installed thickness that will allow the distance between the height of the roof membrane surface to the top of the base flashing to remain in accordance with the manufacturer’s instructions.
Exception 3 to Section 141.0(b)2Bii: At the drains and other low points, tapered insulation with a thermal resistance less than that prescribed in Table 141.0-C may be used, provided that insulation thickness is increased at the high points of the roof so that the average thermal resistance equals or exceeds the value specified in Table 141.0-C.
Exception 4 to Section 141.0(b)2Bii: The area of the roof recoat is not required to be insulated.
TABLE 141.0-C INSULATION REQUIREMENTS FOR ROOF ALTERATIONS
Climate Zone	Continuous Insulation R-value	U-factor	
1-5, 9-16	R-23	0.037, with at least R-10 above deck	
6-8	R-17	0.047, with at least R-10 above deck	
New or Replacement Space-Conditioning Systems or Components other than new or replacement space-conditioning system ducts shall meet the requirements of Section 140.4 applicable to the systems or components being altered. Additional Fan Power Allowances are available when determining the Fan Power Budget (Fan kWbudget) as specified in Table 141.0-D. These values can be added to the Fan Power Allowance values in Tables 140.4-A and Table 140.4-B.

TABLE 141.0-D: ADDITIONAL FAN POWER ALLOWANCES
Airflow	Multi-Zone VAV
Systems1
≤5,000 cfm	Multi-Zone VAV Systems1
>5,000 and
≤10,000 cfm	Multi-Zone VAV
Systems1
>10,000 cfm	All Other Fan Systems
≤5,000 cfm	All Other Fan Systems
>5,000
and
≤10,000
cfm	All Other Fan Systems
>10,000
cfm	
Supply Fan System Additional
Allowance	0.135	0.114	0.105	0.139	0.12	0.107	
Supply Fan System Additional Allowance In Unit
with Adapter Curb	0.033	0.033	0.043	0.000	0.000	0.000	
Exhaust/ Relief/ Return/ Transfer Fan System Additional
Allowance	0.07	0.061	0.054	0.07	0.062	0.055	
Exhaust/ Relief/ Return/ Transfer Fan System Additional Allowance In Unit
with Adapter Curb	0.016	0.017	0.022	0.000	0.000	0.000	
Footnotes to Table 141.0-D:
See FAN SYSTEM, MULTI-ZONE VARIABLE AIR VOLUME (VAV) in definitions for “Multi-zone” to be classified as a multi-zone VAV system.

Exception 1 to Section 141.0(b)2C: Section 140.4(a)2 shall not apply to new or replacement space conditioning systems or components.
Exception 2 to Section 141.0(b)2C: Subsection (b)2C does not apply to replacement of electric reheat of equivalent or lower capacity electric resistance space heaters, when natural gas is not available.
Exception 3 to Section 141.0(b)2C: Section 140.4(n) is not applicable to new or replacement space conditioning systems.
Exception 4 to Section 141.0(b)2C: Section 140.4(e) is applicable to systems, other than single package air-cooled commercial unitary air conditioners and heat pumps, with cooling capacity less than 54,000 Btu/h.
Exception 5 to Section 141.0(b)2C: A new or replacement gas hot water boiler system with a total system input of at least 1 MMBtu/h but no more than 10 MMBtu/h need not comply with the requirements of 140.4(k)8.
Altered Duct Systems. New or replacement space-conditioning system ducts installed to serve an existing building shall meet the requirements of Section 120.4(a) through (f) and meet I, ii, or iii below:
Entirely new or complete replacement duct systems installed as part of an alteration shall be leakage tested in accordance with Section 120.4(g). This applies to replacement duct systems

installed as part of an alteration that are constructed of at least 75 percent new duct material. Up to 25 percent of that alteration may consist of reused parts from the building's existing duct system, including registers, grilles, boots, air handlers, coils, plenums, and ducts, if the reused parts are accessible and can be sealed to prevent leakage.
If the new ducts are an extension of an existing duct system and the combined new and existing duct system meets the criteria in Subsections 1, 2, 3, and 4 below, the duct system shall be sealed to a leakage rate not to exceed 15 percent of the nominal air handler airflow rate as confirmed through HERS field verification and diagnostic testing, in accordance with the applicable procedures in Reference Nonresidential Appendix NA7.5.3:
The duct system does not serve a healthcare facility;
The duct system provides conditioned air to an occupiable space for a constant volume, single zone, space-conditioning system;
The space conditioning system serves less than 5,000 square feet of conditioned floor area; and
The combined surface area of the ducts located outdoors or in unconditioned space is more than 25 percent of the total surface area of the entire duct system.
Exception 1 to Section 141.0(b)2Dii: When it is not possible to achieve the duct leakage criterion in Section 141.0(b)2Dii, then all accessible leaks shall be sealed and verified through a visual inspection and a smoke test performed by a certified HERS Rater utilizing the methods specified in Reference Nonresidential Appendix NA2.1.4.2.2.
Exception 2 to Section 141.0(b)2Dii: Duct Sealing. Existing duct systems that are extended, which are constructed, insulated or sealed with asbestos are exempt from the requirements of subsection 141.0(b)2Dii.
If new ducts installed as part of an alteration are exempt from leakage testing according to section 141.0(b)2Di or 141.0(b)2Dii, then the new ducts shall meet the duct leakage testing requirements of CMC Section 603.9.2.
Altered Space-Conditioning Systems. When a space-conditioning system is altered by the installation or replacement of space-conditioning system equipment (including replacement of the air handler, outdoor condensing unit of a split system air conditioner or heat pump, or cooling or heating coil:
For all altered units where the existing thermostat does not comply with the requirements for demand responsive controls specified in Section 110.12, the existing thermostat shall be replaced with a demand responsive thermostat that complies with Section 110.12. All newly installed space-conditioning systems requiring a thermostat shall be equipped with a demand responsive thermostat that complies with Section 110.12; and
The duct system that is connected to the new or replaced space-conditioning system equipment shall be sealed in accordance with Section 141.0(b)2Dii.
Exception 1 to Section 141.0(b)2Eii: Duct Sealing. Buildings altered so that the duct system no longer meets the criteria of Section 141.0(b)2Dii.
Exception 2 to Section 141.0(b)2Eii: Duct Sealing. Duct systems that are documented to have been previously sealed as confirmed through field verification and diagnostic testing in accordance with procedures in the Reference Nonresidential Appendix NA2.
Exception 3 to Section 141.0(b)2Eii: Duct Sealing. Existing duct systems constructed, insulated or sealed with asbestos are exempt from the requirements of Subsection 141.0(b)2Eii.
Spaces with lighting systems installed for the first time shall meet the requirements of Sections 110.9, 130.0, 130.1, 130.2, 130.4, 140.3(c), 140.6 and 140.7.

When the requirements of Section 130.1(d) are triggered by the addition of skylights to an existing building and the lighting system is not recircuited, the daylighting control need not meet the multilevel requirements in Section 130.1(d).
New internally and externally illuminated signs shall meet the requirements of Sections 110.9, 130.3 and 140.8.
Altered Indoor Lighting Systems. Alterations to indoor lighting systems that include 10% or more of the luminaires serving an enclosed space shall meet the requirements of i, ii, or iii below:
The alteration shall comply with the indoor lighting power requirements specified in Section 140.6 and the lighting control requirements specified in Table 141.0-F;
The alteration shall not exceed 80% of the indoor lighting power requirements specified in Section 140.6, and shall comply with the lighting control requirements specified in Table 141.0-F; or
The alteration shall be a one-for-one luminaire alteration within a building or tenant space of 5,000 square feet or less, the total wattage of the altered luminaires shall be at least 40% lower compared to their total pre-alteration wattage, and the alteration shall comply with the lighting control requirements specified in Table 141.0-F.
Alterations to indoor lighting systems shall not prevent the operation of existing, unaltered controls, and shall not alter controls to remove functions specified in Section 130.1.
Alterations to lighting wiring are considered alterations to the lighting system. Alterations to indoor lighting systems are not required to separate existing general, floor, wall, display, or decorative lighting on shared circuits or controls. New or completely replaced lighting circuits shall comply with the control separation requirements of Section 130.1(a)3 and 130.1(c)1D.
Exception 1 to Section 141.0(b)2I: Alteration of portable luminaires, luminaires affixed to moveable partitions, or lighting excluded as specified in Section 140.6(a)3.
Exception 2 to Section 141.0(b)2I: Any enclosed space with only one luminaire.
Exception 3 to Section 141.0(b)2I: Any alteration that would directly cause the disturbance of asbestos unless the alteration is made in conjunction with asbestos abatement.
Exception 4 to Section 141.0(b)2I: Acceptance testing requirements of Section 130.4 are not required for alterations where lighting controls are added to control 20 or fewer luminaires.
Exception 5 to Section 141.0(b)2I: Any alteration limited to adding lighting controls or replacing lamps, ballasts, or drivers.
Exception 6 to Section 141.0(b)2I: One-for-one luminaire alteration of up to 50 luminaires either per complete floor of the building or per complete tenant space, per annum.
Reserved.
Reserved.
Alterations to existing outdoor lighting systems in a lighting application listed in TABLE 140.7-A or 140.7-B shall meet the applicable requirements of Sections 130.0, 130.2(b), and 130.4, and:
In alterations that increase the connected lighting load, the added or altered luminaires shall meet the applicable requirements of Section 130.2(c) and the requirements of Section 140.7 for general hardscape lighting or for the specific lighting applications containing the alterations; and
In alterations that do not increase the connected lighting load, where 10 percent or more of the existing luminaires are replaced in a general hardscape or a specific lighting application, the alterations shall meet the following requirements:
In parking lots and outdoor sales lots where the bottom of the luminaire is mounted 24 feet or less above the ground, the replacement luminaires shall comply with Section 130.2(c)1 AND Section 130.2(c)3;

For parking lots and outdoor sales lots where the bottom of the luminaire is mounted greater than 24 feet above the ground and for all other lighting applications, the replacement luminaires shall comply with Section 130.2(c)1 AND EITHER comply with Section 130.2(c)2 or be controlled by lighting control systems, including motion sensors, that automatically reduce lighting power by at least 40 percent in response to the area being vacated of occupants; and
Exception to Section 141.0(b)2Lii: Alterations where less than 5 existing luminaires are replaced.
In alterations that do not increase the connected lighting load, where 50 percent or more of the existing luminaires are replaced in general hardscape or a specific application, the replacement luminaires shall meet the requirements of subsection ii above and the requirements of Section
140.7 for general hardscape lighting or specific lighting applications containing the alterations.
Exception 1 to Section 141.0(b)2Liii: Alterations where the replacement luminaires have at least 40 percent lower power consumption compared to the original luminaires are not required to comply with the lighting power allowances of Section 140.7.
Exception 2 to Section 141.0(b)2Liii: Alterations where less than 5 existing luminaires are replaced.
Exception to Section 141.0(b)2L: Acceptance testing requirements of Section 130.4 are not required for alterations where controls are added to 20 or fewer luminaires.
Alterations to existing internally and externally illuminated signs that increase the connected lighting load, replace and rewire more than 50 percent of the ballasts, or relocate the sign to a different location on the same site or on a different site shall meet the requirements of Section 140.8.
Exception to Section 141.0(b)2M: Replacement of parts of an existing sign, including replacing lamps, the sign face or ballasts, that do not require rewiring or that are done at a time other than when the sign is relocated, is not an alteration subject to the requirements of Section 141.0(b)2M.
Service water-heating systems shall meet the requirements of Section 140.5(a)2 and (b), except for the solar water heating requirements.
A building shell for which interior walls or ceilings are installed for the first time shall meet the requirements of Section 140.3(c).
Electrical Power Distribution Systems. Alterations to electrical power distribution systems shall meet the applicable requirements of Section 130.5 as follows:
Service Electrical Metering. New or replacement electrical service equipment shall meet the requirements of Section 130.5(a) applicable to the electrical power distribution system altered.
Separation Of Electrical Circuits For Electrical Energy Monitoring. For entirely new or complete replacement of electrical power distribution systems, the entire system shall meet the applicable requirements of Section 130.5(b).
Voltage Drop. Alterations of feeders and branch circuits where the alteration includes addition, modification, or replacement of both feeders and branch circuits, the altered circuits shall meet the requirements of Section 130.5(c).
Exception to Section 141.0(b)2Piii: Voltage drop permitted by California Electrical Code Sections 647.4, 695.6 and 695.7.
Circuit Controls for 120-Volt Receptacles and Controlled Receptacles. For entirely new or complete replacement of electrical power distribution systems, the entire system shall meet the applicable requirements of Sections 130.5(d) and 130.5(e).
Existing building envelope wall where at least 25% or more of the wall area is being altered must comply with Section 140.3(a)9. Where the building is tested in accordance with the procedures for whole building air leakage in NA2.4 and the tested leakage rate exceeds 0.4 cfm/ft2 of building shell at 75 pa. A Visual Inspection and Diagnostic Evaluation shall be done in accordance with NA2.4.7 and all

observed leaks shall be sealed where such sealing can be made without destruction of existing building components.
Exception to Section 141.0(b)2Q: Healthcare facilities.
Exterior doors. Alterations that add exterior door area shall meet the U-factor requirements of Section 140.3(a)7.
Performance approach.
The altered envelope, space–conditioning system, lighting and water heating components, and any newly installed equipment serving the alteration, shall meet the applicable requirements of Sections
110.0 through 110.9, Sections 120.0 through 120.6, and Sections 120.9 through 130.5.
Exception 1 to Section 141.0(b)3A: Window Films. Applied window films installed as part of an alteration complies with the U-factor, RSHGC and VT requirements of TABLE 141.0-E.
Exception 2 to Section 141.0(b)3A: The requirements of Section 120.2(i) shall not apply to alterations of space-conditioning systems or components.
The standard design for an altered component shall be the higher efficiency of existing conditions or the requirements of Section 141.0(b)2. For components not being altered, the standard design shall be based on the unaltered existing conditions such that the standard and proposed designs for these components are identical.
When the third party verification option is specified, all components proposed for alteration, for which the additional credit is taken, must be verified. The Executive Director shall determine the qualifications required by the third party inspector.
The proposed design shall be based on the actual values of the altered components.
NOTES TO SECTION 141.0(b)3:
If an existing component is replaced with a new component, that component is considered an altered component for the purpose of determining the energy budget and shall meet the requirements of Section 141.0(b)3.
The standard design assumes the same geometry and orientation as the proposed design.
The “existing efficiency level” modeling rules, including situations where nameplate data is not available, are described in the Nonresidential ACM Reference Manual.
Exception 1 to Section 141.0(b): When heating, cooling or service water heating for an alteration are provided by expanding existing systems, the existing systems and equipment need not comply with Sections 110.0 through 120.9 and Section 140.4 or 140.5.
Exception 2 to Section 141.0(b): When existing heating, cooling or service water heating systems or components are moved within a building, the existing systems or components need not comply with Sections
110.0 through 120.9 and Section 140.4 or 140.5.
Exception 3 to Section 141.0(b): Where an existing system with electric reheat is expanded when adding variable air volume (VAV) boxes to serve an alteration, total electric reheat capacity may be expanded not to exceed 20 percent of the existing installed electric capacity in any one permit and the system need not comply with Section 140.4(g). Additional electric reheat capacity in excess of 20 percent may be added subject to the requirements of the Section 140.4(g).
Exception 4 to Section 141.0(b): The requirements of Section 120.2(i) shall not apply to alterations of space- conditioning systems or components.

TABLE 141.0-E – The Standard Design For An Altered Component
Altered Component	Standard Design Without Third Party Verification of Existing Conditions Shall be Based On	Standard Design With Third Party Verification of Existing Conditions Shall be Based On	
Roof/Ceiling Insulation, Wall Insulation, and Floor/Soffit Insulation	The requirements of Section 141.0(b)1 and 141.0(b)2Bii.	The requirements of Section 141.0(b)1 and 141.0(b)2Bii.	
Fenestration
The allowed glass area shall be the smaller of the a. or b. below:
The proposed glass area: or
The larger of:
	The existing glass area that remains; or
	The area allowed in Section 140.3(a)5A.	The U-factor and RSHGC requirements of TABLE 141.0-A.	The existing U-factor and RSHGC levels.	
Space-Conditioning System Equipment and Ducts	The requirements of Sections 141.0(b)2C, 141.0(b)2Di or Section 141.0(b)2Dii, and Section 141.0(b)2E.	The requirements of Sections 141.0(b)2C, 141.0(b)2Di or Section 141.0(b)2Dii, and Section 141.0(b)2E.	
Window Film	The U-factor of 0.40 and SHGC value of 0.35.	The existing fenestration in the alteration shall be based on TABLE 110.6-A and Table 110.6-B.	
Service Water Heating Systems	The requirements of Section 140.5 without solar water heating requirements.	The requirements of Section 140.5 without solar water heating requirements.	
Roofing Products	The requirements of Section 141.0(b)2B.	The requirements of Section 141.0(b)2B.	
Lighting System	The requirements of Sections 141.0(b)2F, through 141.0(b)2K.	The requirements of Sections 141.0(b)2F, through 141.0(b)2K.	
All Other Measures	The proposed efficiency levels.	The proposed efficiency levels.	
Repairs. Repairs shall not increase the preexisting energy consumption of the repaired component, system, or equipment.
Alternate Method of Compliance. Any addition, alteration, or repair may comply with the requirements of Title 24, Part 6 by meeting the applicable requirements for the entire building.

Table 141.0-F – Control Requirements for Indoor Lighting System Alterations
Control Specifications		Projects complying with Section 141.0(b)2Ii	Projects complying with Sections 141.0(b)2Iii or
141.0(b)2Iiii	
Manual Area Controls	130.1(a)1	Required	Required	
Manual Area Controls	130.1(a)2	Required	Required	
Manual Area Controls	130.1(a)3	Only required for new or completely replaced
circuits	Only required for new or completely replaced
circuits	
Multilevel Controls	130.1(b)	Required	Not Required	
Automatic Shut Off Controls	130.1(c)1	Required; 130.1(c)1D only required for new or completely replaced
circuits	Required; 130.1(c)1D only required for new or completely replaced
circuits	
Automatic Shut Off Controls	130.1(c)2	Required	Required	
Automatic Shut Off Controls	130.1(c)3	Required	Required	
Automatic Shut Off Controls	130.1(c)4	Required	Required	
Automatic Shut Off Controls	130.1(c)5	Required	Required	
Automatic Shut Off Controls	130.1(c)6	Required	Required; except for 130.1(c)6D	
Automatic Shut Off Controls	130.1(c)7	Required	Required	
Automatic Shut Off Controls	130.1(c)8	Required	Required	
Daylighting Controls	130.1(d)	Required	Not Required	
Demand Responsive Controls	110.12(a) and 110.12(c)	Required	Not Required	

NOTE: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, 25910, and 25943, Public Resources
Code.

SECTION 141.1 – REQUIREMENTS FOR COVERED PROCESSES IN ADDITIONS, ALTERATIONS TO EXISTING NONRESIDENTIAL, AND HOTEL/MOTEL BUILDINGS
Covered processes in additions or alterations to existing buildings that will be nonresidential, and hotel/motel occupancies shall comply with the applicable subsections of section 120.6 and 140.9.
Lab and Process Facility Exhaust Systems. All newly installed fan systems for a laboratory or process facility exhaust system greater than 10,000 cfm shall meet the requirements of Section 140.9(c).
Computer Rooms. All newly installed computer room cooling systems and uninterruptible power supply systems in additions/alterations shall meet the requirements of Sections 120.6(j), 140.9(a)2, and 140.9(a)4 and comply with item 1 below.
Economizers. Each individual cooling system primarily serving computer rooms in an existing building shall include either:
An integrated air economizer capable of partial cooling when additional mechanical cooling is required and capable of providing 100 percent of the expected system cooling load up to 80°F room supply air temperature at outside air temperatures of 55°F dry-bulb and below or 50°F wet-bulb and below, and be equipped with a fault detection and diagnostic system as specified by section 120.2(i); or
An integrated water economizer capable of partial cooling when additional mechanical cooling is required and capable of providing 100 percent of the expected system cooling load up to 80°F room supply air temperature at outside air temperatures of 40°F dry-bulb and below or 35°F wet-bulb and below.

EXCEPTION 1 to Section 141.1(b)1: Individual computer rooms with an ITE design load under 5 tons (18 kW) in a building that does not have any economizers.
EXCEPTION 2 to Section 141.1.(b)1: New cooling systems serving an existing computer room in an existing building with an ITE design load up to a total of 50 tons (176 kW).
EXCEPTION 3 to Section 141.1(b)1: New cooling systems serving a new computer room in an existing building with an ITE design load up to a total of 20 tons (70 kW).
Controlled Environment Horticulture Spaces.
Indoor Growing, Space-Conditioning Systems and Dehumidification. All newly installed heating, ventilation, air conditioning systems or dehumidification systems in buildings with indoor growing shall meet the applicable requirements of Section 120.6(h)1 and 120.6(h)2.
Greenhouses, Building Envelope and Space-Conditioning Systems. A greenhouse being converted to a conditioned greenhouse or additions to a conditioned greenhouse shall meet the requirements of Sections 120.6(h)5 and 120.6(h)6.
Indoor Growing and Greenhouses, Horticultural Lighting. When alterations to horticultural lighting systems increase lighting wattage or include adding, replacing, or altering 10 percent or more of the horticultural luminaires serving an enclosed space, the newly installed, replaced, or
altered lighting shall meet the requirements of Section 120.6(h)3 for indoor growing or Section 120.6(h)7 for greenhouses.
EXCEPTION to Section 141.1(c)3: Any alteration limited to adding lighting controls or replacing lamps, ballasts, or drivers.
NOTE: For alterations that change the occupancy classification of the building, the requirements of Section 141.1 apply to the occupancy that will exist after the alterations.
NOTE: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.8, and 25943, Public Resources Code.

SUBCHAPTER 7
SINGLE-FAMILY RESIDENTIAL BUILDINGS – MANDATORY FEATURES AND DEVICES

SECTION 150.0 – MANDATORY FEATURES AND DEVICES
Single-family residential buildings shall comply with the applicable requirements of Sections 150(a) through 150.0(v).
NOTE: The requirements of Sections 150.0(a) through 150.0(r) apply to newly constructed buildings. Sections 150.2(a) and 150.2(b) specify which requirements of Sections 150.0(a) through 150.0(r) also apply to additions or alterations.
Roof deck, ceiling and rafter roof insulation. The opaque portions of roof decks separating attic spaces from ambient air, and ceilings or rafter roofs separating conditioned spaces from unconditioned spaces or ambient air, shall meet the requirements of Items 1 through 4 below:
In Climate Zones 4 and 8 through 16, roof decks in newly constructed attic systems shall be insulated to achieve an area-weighted average U-factor not exceeding U-0.184.
Exception to Section 150.0(a)1:
The space-conditioning system air handler and ducts are located entirely in conditioned space below the ceiling separating the occupiable space from the attic; or
The space-conditioning system air handler is located in unconditioned space and has 12 linear feet or less of supply duct, including the length of the air handler and the plenum, located in unconditioned space, with all other portions of the supply ducts located in conditioned space below the ceiling separating the occupiable space from the attic.
Ceilings and rafter roofs shall be insulated to achieve an area-weighted average U-factor not exceeding U-
0.043 or shall be insulated between wood-framing members with insulation resulting in an installed thermal resistance of R-22 or greater for the insulation alone. For vented attics, the mandatory insulation shall be installed at the ceiling level; for unvented attics, the mandatory insulation shall be placed at either ceiling or roof level; and
Exception to Section 150.0(a)2: Ceilings and rafter roofs in an alteration shall be insulated to achieve an area-weighted average U-factor not exceeding 0.054 or shall be insulated between wood-framing members with insulation resulting in an installed thermal resistance of R-19 or greater.
Attic access doors shall have permanently attached insulation using adhesive or mechanical fasteners. The attic access shall be gasketed to prevent air leakage; and
Insulation shall be installed in direct contact with a roof or ceiling which is sealed to limit infiltration and exfiltration as specified in Section 110.7, including but not limited to placing insulation either above or below the roof deck or on top of a drywall ceiling.
Loose-fill insulation. When loose-fill insulation is installed, the minimum installed weight per square foot shall conform with the insulation manufacturer’s installed design weight per square foot at the manufacturer’s labeled R-value.
Wall insulation. Opaque portions of above grade walls separating conditioned spaces from unconditioned spaces or ambient air shall meet the following requirements:
2 × 4 inch framing shall have an overall assembly U-factor not exceeding U-0.102.

Exception to Section 150.0(c)1: Existing walls already insulated to a U-factor not exceeding U-0.110 or already insulated between framing members with insulation having an installed thermal resistance of R-11 or greater.
2 × 6 inch or greater framing shall have an overall assembly U-factor not exceeding U-0.071.
3.	Opaque nonframed assemblies shall have an overall assembly U-factor not exceeding U-0.102.
Bay or bow window roofs and floors shall be insulated to meet the wall insulation requirements of Table 150.1-A.
Masonry walls shall be insulated to meet the wall insulation requirements of Table 150.1-A.
In wood framed assemblies, compliance with U-factors may be demonstrated by installing wall insulation with an R-value of 13 in 2x4 assemblies, and 20 in 2x6 assemblies.
Raised-floor insulation. Raised floors separating conditioned space from unconditioned space or ambient air shall have an overall assembly U-factor not exceeding U-0.037. In a wood framed assembly, compliance with the U-factor may be demonstrated by installing insulation with an R-value of 19 or greater.
Exception to Section 150.0(d): A building with a controlled ventilation or unvented crawlspace may omit raised floor insulation if all of the following are met:
The foundation walls are insulated to meet the wall insulation minimums as shown in Table 150.1-A; and
A Class I or Class II vapor retarder is placed over the entire floor of the crawl space; and
Vents between the crawlspace and outside air are fitted with automatically operated louvers that are temperature actuated; and
The requirements in Reference Residential Appendix RA4.5.1.
Installation of fireplaces, decorative gas appliances and gas logs. If a masonry or factory-built fireplace is installed, it shall comply with Section 110.5, Section 4.503 of Part 11, and shall have the following:
Closable metal or glass doors covering the entire opening of the firebox; and
A combustion air intake to draw air from the outside of the building, which is at least 6 square inches in area and is equipped with a readily accessible, operable and tight-fitting damper or combustion-air control device; and
Exception to Section 150.0(e)2: An outside combustion-air intake is not required if the fireplace will be installed over concrete slab flooring and the fireplace will not be located on an exterior wall.
A flue damper with a readily accessible control.
Exception to Section 150.0(e)3: When a gas log, log lighter or decorative gas appliance is installed in a fireplace, the flue damper shall be blocked open if required by the CMC or the manufacturer’s installation instructions.
Slab edge insulation. Material used for slab edge insulation shall meet the following minimum specifications:
Water absorption rate for the insulation material alone without facings no greater than 0.3 percent when tested in accordance with Test Method A – 24-Hour-Immersion of ASTM C272.
Water vapor permeance no greater than 2.0 perm/inch when tested in accordance with ASTM E96.
Concrete slab perimeter insulation shall be protected from physical damage and ultraviolet light deterioration.
Insulation for a heated slab floor shall meet the requirements of Section 110.8(g).

Vapor retarder.
In Climate Zones 1–16, the earth floor of unvented crawl space shall be covered with a Class I or Class II vapor retarder. This requirement shall also apply to controlled ventilation crawl space for buildings complying with the Exception to Section 150.0(d).
In Climate Zones 14 and 16, a Class I or Class II vapor retarder shall be installed on the conditioned space side of all insulation in all exterior walls, vented attics and unvented attics with air-permeable insulation.
Space-conditioning equipment.
Building cooling and heating loads. Building heating and cooling loads shall be determined using a method based on any one of the following:
The ASHRAE Handbook, Equipment Volume, Applications Volume and Fundamentals Volume; or
The SMACNA Residential Comfort System Installation Standards Manual; or
The ACCA Manual J.
The cooling and heating loads are two of the criteria that shall be used for equipment sizing and selection.
Note: Heating systems are required to have a minimum heating capacity adequate to meet the minimum requirements of the CBC. The furnace output capacity and other specifications are published in the Commission’s directory of certified equipment or other directories approved by the Commission.
Design conditions. For the purpose of sizing the space- conditioning (HVAC) system, the indoor design temperatures shall be 68°F for heating and 75°F for cooling. Outdoor design conditions shall be selected from Reference Joint Appendix JA2, which is based on data from the ASHRAE Climatic Data for Region X. The outdoor design temperatures for heating shall be no lower than the Heating Winter Median of Extremes values. The outdoor design temperatures for cooling shall be no greater than the 1.0 percent Cooling Dry Bulb and Mean Coincident Wet Bulb values.
Outdoor condensing units.
Clearances. Installed air conditioner and heat pump outdoor condensing units shall have a clearance of at least five (5) feet (1.5 meters) from the outlet of any dryer vent.
Liquid line drier. Installed air conditioner and heat pump systems shall be equipped with liquid line filter driers if required, as specified by manufacturer’s instructions.
Central forced-air heating furnaces.
A. Temperature rise. Central forced-air heating furnace installations shall be configured to operate in conformance with the furnace manufacturer’s maximum inlet-to-outlet temperature rise specifications.
Thermostats. All heating or cooling systems, including heat pumps, not controlled by a central energy management control system (EMCS) shall have a setback thermostat, as specified in Section 110.2(c).
Insulation for piping and tanks.
Water piping, solar water-heating system piping, and space-conditioning system line insulation thickness and conductivity. Piping shall be insulated as follows:
All domestic hot water piping shall be insulated as specified in Section 609.11 of the California Plumbing Code.
Piping for space-conditioning systems, solar water-heating system collector loop, and distribution piping for steam and hydronic heating system shall meet the requirements of Section 120.3(a).
Exception 1 to Section 150.0(j)1: Factory-installed piping within space-conditioning equipment certified under Section 110.1 or 110.2.

Exception 2 to Section 150.0(j)1: Piping that penetrates framing members shall not be required to have pipe insulation for the distance of the framing penetration. Piping that penetrates metal framing shall use grommets, plugs, wrapping or other insulating material to assure that no contact is made with the metal framing. Insulation shall butt securely against all framing members.
Exception 3 to Section 150.0(j)1: Piping installed in interior or exterior walls shall not be required to have pipe insulation if all of the requirements are met for compliance with (QII) as specified in the Reference Residential Appendix RA3.5.
Exception 4 to Section 150.0(j)1: Piping surrounded with a minimum of 1 inch of wall insulation, 2 inches of crawlspace insulation, or 4 inches of attic insulation shall not be required to have pipe insulation.
Insulation protection. Pipe insulation shall meet the insulation protection requirements of Section 120.3(b).
Residential lighting.
Luminaire requirements.
Luminaire efficacy. All installed luminaires shall meet the requirements in Table 150.0-A.
Exception 1 to Section 150.0(k)1A: Integrated device lighting. Lighting integral to exhaust fans, kitchen range hoods, bath vanity mirrors and garage door openers.
Exception 2 to Section 150.0(k)1A: Navigation lighting such as night lights, step lights, and path lights less than 5 watts.
Exception 3 to Section 150.0(k)1A: Cabinet lighting. Lighting internal to drawers, cabinetry and linen closets with an efficacy of 45 lumens per watt or greater.
Screw-based luminaires. Screw-based luminaires shall contain lamps that comply with Reference Joint Appendix JA8.
Recessed downlight luminaires in ceilings. Luminaires recessed into ceilings shall meet all of the following requirements:
Shall not contain screw base lamp sockets; and
Have a label that certifies the luminaire is airtight with air leakage less than 2.0 cfm at 75 Pascals when tested in accordance with ASTM E283. An exhaust fan housing with integral light shall not be required to be certified airtight; and
Be sealed with a gasket or caulk between the luminaire housing and ceiling, and have all air leak paths between conditioned and unconditioned spaces sealed with a gasket or caulk, or be installed per manufacturer’s instructions to maintain airtightness between the luminaire housing and ceiling; and
Meet the clearance and installation requirements of California Electrical Code Section 410.116 for recessed luminaires.
Exception to Sections 150.0(k)1Cii and iii: Recessed luminaires marked for use in fire-rated installations extruded into ceiling space and recessed luminaires installed in noninsulated ceilings.
Light sources in enclosed or recessed luminaires. Lamps and other separable light sources that are not compliant with the JA8 elevated temperature requirements, including marking requirements, shall not be installed in enclosed or recessed luminaires.
Blank electrical boxes. The number of electrical boxes that are more than 5 feet above the finished floor and do not contain a luminaire or other device shall be no greater than the number of bedrooms. These electrical boxes must be served by a dimmer, vacancy sensor control, low voltage wiring or fan speed control.

Indoor lighting controls.
Lighting shall have readily accessible wall-mounted controls that allow the lighting to be manually turned ON and OFF.
Exception to Section 150.0(k)2A: Ceiling fans may provide control of integrated lighting via a remote control.
No controls shall bypass a dimmer, occupant sensor or vacancy sensor function where that dimmer or sensor has been installed to comply with Section 150.0(k).
Lighting controls shall comply with the applicable requirements of Section 110.9.
An Energy Management Control System (EMCS) or a multiscene programmable control may be used to comply with dimming, occupancy and lighting control requirements in Section 150.0(k)2 if it provides the functionality of the specified controls in accordance with Section 110.9, and the physical controls specified in Section 150.0(k)2A.
Automatic-off controls.
In bathrooms, garages, laundry rooms, utility rooms and walk-in closets, at least one installed luminaire shall be controlled by an occupancy or vacancy sensor providing automatic-off functionality.
For lighting internal to drawers and cabinetry with opaque fronts or doors, controls that turn the light off when the drawer or door is closed shall be provided.
Dimming controls. Lighting in habitable spaces, including but not limited to living rooms, dining rooms, kitchens and bedrooms, shall have readily accessible wall-mounted dimming controls that allow the lighting to be manually adjusted up and down. Forward phase cut dimmers controlling LED light sources in these spaces shall comply with NEMA SSL 7A.
Exception 1 to Section 150.0(k)2F: Ceiling fans may provide control of integrated lighting via a remote control.
Exception 2 to Section 150.0(k)2F: Luminaires connected to a circuit with controlled lighting power less than 20 watts or controlled by an occupancy or vacancy sensor providing automatic-off functionality.
Exception 3 to Section 150.0(k)2F: Navigation lighting such as night lights, step lights, and path lights less than 5 watts, and lighting internal to drawers and cabinetry with opaque fronts or doors or with automatic-off controls.
Independent controls. Integrated lighting of exhaust fans shall be controlled independently from the fans. The following shall be controlled separately from ceiling-installed lighting such that one can be turned on without turning on the other:
Undercabinet lighting.
Undershelf lighting.
Interior lighting of display cabinets.
Switched outlets.
Residential outdoor lighting. In addition to meeting the requirements of Section 150.0(k)1A, luminaires providing residential outdoor lighting shall meet the following requirements, as applicable:
For single-family residential buildings, outdoor lighting permanently mounted to a residential building or to other buildings on the same lot shall meet the requirement in Item i and the requirements in either Item ii or Item iii:
Controlled by a manual ON and OFF control switch that permits the automatic actions of items ii or iii below; and

Controlled by a photocell and either a motion sensor or an automatic time switch control; or
Controlled by an astronomical time clock control.
Controls that override to ON shall not be allowed unless the override automatically returns the automatic control to its normal operation within 6 hours. An energy management control system that provides the specified lighting control functionality and complies with all requirements applicable to the specified controls may be used to meet these requirements.
Internally illuminated address signs. Internally illuminated address signs shall either:
Comply with Section 140.8; or
Consume no more than 5 watts of power.
Residential garages for eight or more vehicles. Lighting for residential parking garages for eight or more vehicles shall comply with the applicable requirements for nonresidential garages in Sections 110.9, 130.0, 130.1, 130.4, 140.6 and 141.0.
Reserved.
Air-distribution and ventilation system ducts, plenums and fans.
CMC compliance.
All air-distribution system ducts and plenums, including but not limited to, mechanical closets and air- handler boxes, shall meet the requirements of the CMC Sections 601.0, 602.0, 603.0, 604.0, 605.0 and ANSI/SMACNA-006-2006 HVAC Duct Construction Standards Metal and Flexible, 3rd Edition, incorporated herein by reference.
Portions of supply-air and return-air ducts and plenums of a space heating or cooling system shall be insulated in accordance with either Subsection i or ii below:
Ducts shall have a minimum installed level of R-6.0, or
Exception to Section 150.0(m)1Bi: Portions of the duct system located in conditioned space below the ceiling separating the occupiable space from the attic are not required to be insulated if all of the following conditions are met:
The noninsulated portion of the duct system is located entirely inside the building’s thermal envelope as confirmed by visual inspection.
At all locations where noninsulated portions of the duct system penetrate into unconditioned space, the penetration shall be draft stopped compliant with CFC Sections
703.1 and 704.1 and air-sealed to the construction materials that are penetrated, using materials compliant with CMC Section E502.4.2 to prevent air infiltration into the cavity. All connections in unconditioned space are insulated to a minimum of R-6.0 as confirmed by visual inspection.
Ducts do not require insulation when the duct system is located entirely in conditioned space as confirmed through field verification and diagnostic testing in accordance with the requirements of Reference Residential Appendix RA3.1.4.3.8.
Connections of metal ducts and the inner core of flexible ducts shall be mechanically fastened.
Openings shall be sealed with mastic, tape or other duct-closure system that meets the applicable requirements of UL 181, UL181A or UL 181B or aerosol sealant that meets the requirements of UL 723. If mastic or tape is used to seal openings greater than 1/4 inch, the combination of mastic and either mesh or tape shall be used.
Building cavities, support platforms for air handlers and plenums designed or constructed with materials other than sealed sheet metal, duct board or flexible duct shall not be used for conveying conditioned air. Building cavities and support platforms may contain ducts. Ducts installed in cavities

and support platforms shall not be compressed to cause reductions in the cross-sectional area of the ducts.
Exception to Section 150.0(m)1: Ducts and fans integral to a wood heater or fireplace.

Factory-fabricated duct systems.
All factory-fabricated duct systems shall comply with UL 181 for ducts and closure systems, including collars, connections and splices, and be labeled as complying with UL 181. UL 181 testing may be performed by UL laboratories or a laboratory approved by the Executive Director.
All pressure-sensitive tapes, heat-activated tapes, and mastics used in the manufacture of rigid fiberglass ducts shall comply with UL 181 and UL 181A.
All pressure-sensitive tapes and mastics used with flexible ducts shall comply with UL 181 and UL 181B.
Joints and seams of duct systems and their components shall not be sealed with cloth-back rubber adhesive duct tapes unless such tape is used in combination with mastic and drawbands.
Field-fabricated duct systems.
Factory-made rigid fiberglass and flexible ducts for field-fabricated duct systems shall comply with UL
181. All pressure-sensitive tapes, mastics, aerosol sealants or other closure systems used for installing field-fabricated duct systems shall meet the applicable requirements of UL 181, UL 181A and UL 181B.
Mastic sealants and mesh.
Sealants shall comply with the applicable requirements of UL 181, UL 181A and UL 18IB, and be nontoxic and water resistant.
Sealants for interior applications shall be tested in accordance with ASTM C731 and D2202 incorporated herein by reference.
Sealants for exterior applications shall be tested in accordance with ASTM C731, C732 and D2202, incorporated herein by reference.
Sealants and meshes shall be rated for exterior use.
Pressure-sensitive tape. Pressure-sensitive tapes shall comply with the applicable requirements of UL 181, UL 181A and UL 181B.
Joints and seams of duct systems and their components shall not be sealed with cloth-back rubber adhesive duct tapes unless such tape is used in combination with mastic and drawbands.
Drawbands used with flexible duct.
Drawbands shall be either stainless-steel worm-drive hose clamps or UV-resistant nylon duct ties.
Drawbands shall have a minimum tensile strength rating of 150 pounds.
Drawbands shall be tightened as recommended by the manufacturer with an adjustable tensioning tool.
Aerosol-sealant closures.
Aerosol sealants shall meet the requirements of UL 723 and be applied according to manufacturer specifications.
Tapes or mastics used in combination with aerosol sealing shall meet the requirements of this section.
Duct insulation R-value ratings. All duct insulation product R-values shall be based on insulation only (excluding air films, vapor retarder or other duct components) and tested C-values at 75°F mean

temperature at the installed thickness, in accordance with ASTM C518 or ASTM C177, incorporated herein by reference, and certified pursuant to Section 110.8.
Duct insulation thickness. The installed thickness of duct insulation used to determine its R-value shall be determined as follows:
For duct board, duct liner and factory-made rigid ducts not normally subjected to compression, the nominal insulation thickness shall be used.
For duct wrap, installed thickness shall be assumed to be 75 percent (25 percent compression) of nominal thickness.
For factory-made flexible air ducts, the installed thickness shall be determined by dividing the difference between the actual outside diameter and nominal inside diameter by two.
Duct labeling. Insulated flexible duct products installed to meet this requirement shall include labels, in maximum intervals of 3 feet, showing the thermal performance R-value for the duct insulation itself (excluding air films, vapor retarders or other duct components), based on the tests in Section 150.0(m)4 and the installed thickness determined by Section 150.0(m)5C.
Backdraft dampers. All fan systems, regardless of volumetric capacity, that exchange air between the building conditioned space and the outside of the building shall be provided with backdraft or automatic dampers to prevent unintended air leakage through the fan system when the fan system is not operating.
Gravity ventilation dampers. All gravity ventilating systems that serve conditioned space shall be provided with either automatic or readily accessible, manually operated dampers in all openings to the outside except combustion inlet and outlet air openings and elevator shaft vents.
Protection of insulation. Insulation shall be protected from damage, including that due to sunlight, moisture, equipment maintenance and wind, but not limited to the following: Insulation exposed to weather shall be suitable for outdoor service, e.g., protected by aluminum, sheet metal, painted canvas or plastic cover. Cellular foam insulation shall be protected as above or painted with a coating that is water retardant and provides shielding from solar radiation that can cause degradation of the material.
Porous inner core flex duct. Flexible ducts having porous inner cores shall have a non-porous layer or air barrier between the inner core and the outer vapor barrier.
Duct system sealing and leakage testing. When space-conditioning systems utilize forced air duct systems to supply conditioned air to an occupiable space, the ducts shall be sealed as confirmed through field verification and diagnostic testing in accordance with all applicable procedures specified in Reference Residential Appendix RA3.1, and conforming to one of the following Subsections A, B or C as applicable. Air handler airflow for calculation of duct leakage rate compliance targets shall be determined according to methods specified in Reference Residential Appendix RA3.1.4.2.
For single-family dwellings and townhouses with the air-handling unit installed and the ducts connected directly to the air handler, the total leakage of the duct system shall not exceed 5 percent of the air handler airflow as determined utilizing the procedures in Reference Residential Appendix Section RA3.1.4.3.1.
For single-family dwellings and townhouses at the rough-in stage of construction prior to installation of the dwelling’s interior finishing:
Air-handling unit installed. If the air-handling unit is installed and the ducts are connected directly to the air handler, the total leakage of the duct system shall not exceed 5 percent of the air handler airflow as determined utilizing the procedures in Reference Residential Appendix Sections RA3.1.4.3.2, RA3.1.4.3.2.1 and RA3.1.4.3.3.
Air-handling unit not yet installed. If the air-handling unit is not yet installed, the total leakage of the duct system shall not exceed 4 percent of the air handler airflow as determined utilizing the procedures in Reference Residential Appendix Sections RA3.1.4.3.2, RA3.1.4.3.2.2 and RA3.1.4.3.3.

Air filtration.
System types specified in Subsections i, ii, and iii shall be provided with air filters in accordance with Sections 150.0(m)12B, 150.0(m)12C, and 150.0(m)12D. System types specified in Subsection i shall also comply with Section 150.0(m)12E.
Mechanical space-conditioning systems that supply air to an occupiable space through ductwork exceeding 10 feet (3 m) in length.
Mechanical supply-only ventilation systems and makeup air systems that provide outside air to an occupiable space.
The supply side of mechanical balanced ventilation systems, including heat recovery ventilation systems, and energy recovery ventilation systems that provide outside air to an occupiable space.
Exception 1 to Section 150.0(m)12A: Evaporative coolers are exempt from the air filtration requirements in Section 150.0(m)12.
System design and installation.
The system shall be designed to ensure that all recirculated air and all outdoor air supplied to the occupiable space is filtered before passing through any system’s thermal conditioning components.
Exception 1 to Section 150.0(m)12Bi: For heat recovery ventilators and energy recovery ventilators the location of the filters required by Section 150.0(m)12 may be downstream of a system thermal conditioning component, provided the system is equipped with ancillary filtration upstream of the system’s thermal conditioning component.
All systems shall be designed to accommodate the clean-filter pressure drop imposed by the system air filter(s). The design airflow rate and maximum allowable clean-filter pressure drop at the design airflow rate applicable to each air filter shall be determined and reported on labels according to Subsection iv below.
Systems specified in Section 150.0(m)12Ai shall be equipped with air filters that meet either Subsection a or b below.
Nominal two-inch minimum depth filter(s) shall be sized by the system designer, or
Nominal one-inch minimum depth filter(s) shall be allowed if the filter(s) are sized according to Equation 150.0-A, based on a maximum face velocity of 150 ft per minute, and according to the maximum allowable clean-filter pressure drop specified in Section 150.0(m)12Dii.
Aface = Qfilter/Vface	(Equation 150.0-A) where
Aface =	air filter face area, the product of air filter nominal length x nominal width, ft2. Qfilter	=	design airflow rate for the air filter, ft3/min.
Vface =	air filter face velocity £150, ft/min.
All system air filters shall be located and installed in such a manner as to be accessible for regular service by the system owner.
All system air filter installation locations shall be labeled to disclose the applicable design airflow rate and the maximum allowable clean-filter pressure drop. The labels shall be permanently affixed to the air filter installation location, readily legible, and visible to a person replacing the air filter.

Filter racks or grilles shall use gaskets, sealing or other means to close gaps around inserted filters to and prevent air from bypassing the filter.
Air filter efficiency. The system shall be provided with air filter(s) having a designated efficiency equal to or greater than MERV 13 when tested in accordance with ASHRAE Standard 52.2, or a particle size efficiency rating equal to or greater than 50 percent in the 0.30-1.0 mm range, and equal to or greater than 85 percent in the 1.0-3.0 mm range when tested in accordance with AHRI Standard 680.
Air filter pressure drop. All system shall be provided with air-filter(s) that conforms to the applicable maximum allowable clean-filter pressure drop specified in Subsections i, ii, iii, or iv below, when tested using ASHRAE Standard 52.2, or as rated using AHRI Standard 680, for the applicable design airflow rate(s) for the system air filter(s).
The maximum allowable clean-filter pressure drop shall be determined by the system design for the nominal two-inch minimum depth air filter required by Section 150.0(m)12Biia, or
A maximum of 25 PA (0.1 inches water) clean-filter pressure drop shall be allowed for a nominal one-inch depth air filter sized according to Section 150.0(m)12Biib, or
For systems specified in 150.0(m)12Aii, and 150.0(m)12Aiii, the maximum allowable clean filter pressure drop shall be determined by the system design.
If Exception 1 to Section 150.0(m)13B or D is utilized for compliance with cooling system airflow rate and fan efficacy requirements, the clean-filter pressure drop for the system air filter shall conform to the requirements given in Table 150.0-B or 150.0-C.
Air filter product labeling. Systems described in 150.0(m)12)Ai shall be equipped with air filters that have been labeled by the manufacturer to disclose the efficiency and pressure drop ratings that demonstrate conformance with Sections 150.0(m)12C and 150.0(m)12D.
Space conditioning system airflow rate and fan efficacy. Space conditioning systems that utilize forced air ducts to supply cooling to an occupiable space shall:
Static pressure probe. Have a hole for the placement of a static pressure probe (HSPP), or a permanently installed static pressure probe (PSPP) in the supply plenum downstream of the air conditioning evaporator coil. The size, location, and labeling of the HSPP or PSPP shall conform to the requirements specified in Reference Residential Appendix RA3.3.1.1 as confirmed by field verification and diagnostic testing; and
Exception to 150.0(m)13A: Systems that cannot conform to the specifications for hole location in Reference Residential Appendix Figure RA3.3-1 shall not be required to provide holes as described in Figure RA3.3-1.
Single zone central forced air systems. Demonstrate, in every control mode, airflow greater than or equal to 350 CFM per ton of nominal cooling capacity through the return grilles, and an air-handling unit fan efficacy less than or equal to the maximum W/CFM specified in Subsections i or ii below. The airflow rate and fan efficacy requirements in this section shall be confirmed by field verification and diagnostic testing in accordance with the procedures given in Reference Residential Appendix RA3.3.
0.45 W/CFM for gas furnace air-handling units.
0.58 W/CFM for air-handling units that are not gas furnaces.
Zonally controlled central forced air systems. Zonally controlled central forced air cooling systems shall be capable of simultaneously delivering, in every zonal control mode, an airflow from the dwelling, through the air handler fan and delivered to the dwelling, of greater than or equal to 350 cfm per ton of nominal cooling capacity, and operating at an air-handling unit fan efficacy of less than or equal to the maximum W/CFM specified in Subsections i or ii below. The airflow rate and fan efficacy requirements in this section shall be confirmed by field verification and diagnostic testing in accordance with the applicable procedures specified in Reference Residential Appendix RA3.3.
0.45 W/CFM for gas furnace air-handling units.

0.58 W/CFM for air-handling units that are not gas furnaces.
Small duct high velocity forced air systems. Demonstrate, in every control mode, airflow greater than or equal to 250 CFM per ton of nominal cooling capacity through the return grilles, and an air- handling unit fan efficacy less than or equal to 0.62 W/CFM as confirmed by field verification and diagnostic testing in accordance with the procedures given in Reference Residential Appendix RA3.3.
Exception 1 to Section 150.0(m)13B and D: Standard ducted systems (without zoning dampers) may comply by meeting the applicable requirements in Table 150.0-B or 150.0-C as confirmed by field verification and diagnostic testing in accordance with the procedures in Reference Residential Appendix Sections RA3.1.4.4 and RA3.1.4.5. The design clean-filter pressure drop requirements specified by Section 150.0(m)12Div for the system air filter(s) shall conform to the requirements given in Tables 150.0-B and 150.0-C.
Exception 2 to Section 150.0(m)13B and D: Multispeed compressor systems or variable speed compressor systems shall verify air flow (cfm/ton) and fan efficacy (Watt/cfm) for system operation at the maximum compressor speed and the maximum air handler fan speed.
Exception 3 to Section 150.0(m)13B: Gas furnace air-handling units manufactured prior to July 3, 2019 shall comply with a fan efficacy value less than or equal to 0.58 w/cfm as confirmed by field verification and diagnostic testing in accordance with the procedures given in Reference Residential Appendix RA3.3.
Exception 1 to Section 150.0(m)13C: Multispeed or variable speed compressor systems, or single speed compressor systems that utilize the performance compliance approach, shall demonstrate compliance with the airflow (cfm/ton) and fan efficacy (Watt/cfm) requirements of Section 150.0(m)13C by operating the system at maximum compressor capacity and system fan speed with all zones calling for conditioning, rather than in every zonal control mode.
Exception 2 to Section 150.0(m)13C: Gas furnace air-handling units manufactured prior to July 3, 2019 shall comply with a fan efficacy value less than or equal to 0.58 w/cfm as confirmed by field verification and diagnostic testing in accordance with the procedures given in Reference Residential Appendix RA3.3.
Water heating system.
Systems using gas or propane water heaters to serve individual dwelling units shall designate a space at least 2.5 feet by 2.5 feet wide and 7 feet tall suitable for the future installation of a heat pump water heater (HPWH) by meeting either A or B below. All electrical components shall be installed in accordance with the California Electrical Code:
If the designated space is within 3 feet from the water heater, then this space shall include the following:
A dedicated 125 volt, 20 amp electrical receptacle that is connected to the electric panel with a 120/240 volt 3 conductor, 10 AWG copper branch circuit, within 3 feet from the water heater and accessible to the water heater with no obstructions; and
Both ends of the unused conductor shall be labeled with the word “spare” and be electrically isolated; and
A reserved single pole circuit breaker space in the electrical panel adjacent to the circuit breaker for the branch circuit in A above and labeled with the words “Future 240V Use”; and
A condensate drain that is no more than 2 inches higher than the base of the installed water heater, and allows natural draining without pump assistance.
If the designated space is more than 3 feet from the water heater, then this space shall include the following:

A dedicated 240 volt branch circuit shall be installed within 3 feet from the designated space. The branch circuit shall be rated at 30 amps minimum. The blank cover shall be identified as “240V ready”; and
The main electrical service panel shall have a reserved space to allow for the installation of a double pole circuit breaker for a future HPWH installation. The reserved space shall be permanently marked as “For Future 240V use”; and
Either a dedicated cold water supply, or the cold water supply shall pass through the designated HPWH location just before reaching the gas or propane water heater; and
The hot water supply pipe coming out of the gas or propane water heater shall be routed first through the designated HPWH location before serving any fixtures; and
The hot and cold water piping at the designated HPWH location shall be exposed and readily accessible for future installation of an HPWH; and
A condensate drain that is no more than 2 inches higher than the base of the installed water heater, and allows natural draining without pump assistance.
Water heating recirculation loops serving multiple dwelling units shall meet the requirements of Section 110.3(c)4.
Solar water-heating systems and collectors shall be certified and rated by the Solar Rating and Certification Corporation (SRCC), the International Association of Plumbing and Mechanical Officials, Research and Testing (IAPMO R&T), or by a listing agency that is approved by the Executive Director.
Instantaneous water heaters with an input rating greater than 6.8 kBTU/hr (2kW) shall meet the requirements of Section 110.3(c)6.
Requirements for ventilation and indoor air quality. All dwelling units shall meet the requirements of ASHRAE Standard 62.2. Ventilation and Acceptable Indoor Air Quality in Residential Buildings subject to the amendments specified in Section 150.0(o)1 below. All dwelling units shall comply with Section 150.0(o)2 below.
Exception to Section 150.0(o): The following sections of ASHRAE 62.2 shall not be required for compliance: Section 4.1.1, Section 4.1.2, Section 4.1.4, Section 4.3, Section 4.6, Section 5, Section 6.1.1, Section 6.5.2 and Normative Appendix A.
Amendments to ASHRAE 62.2 requirements.
Window operation. Window operation is not a permissible method of providing the dwelling unit ventilation airflow specified in Section 150.0(o)1C below.
Central fan integrated (CFI) ventilation systems. CFI ventilation systems shall meet the following requirements.
Continuous operation prohibition. Continuous operation of a dwelling unit’s central forced air system air handlers used in CFI ventilation systems is not a permissible method of providing the whole-dwelling unit ventilation airflow required in Section 150.0(o)1C.
Outdoor air damper(s). A motorized damper(s) shall be installed on the connected ventilation duct(s) of CFI systems that prevents all airflow into or out of the space-conditioning duct system when the damper(s) is closed.
Damper control. The required motorized damper(s) shall be controlled to be in an opened position when outdoor air ventilation is required for compliance, and shall be in the closed position when ventilation air is not required. The damper(s) shall be closed whenever the space- conditioning system air handling unit is not operating. If the outdoor airflow for the CFI ventilation system is fan-powered, then the outdoor air fan shall not operate when the required motorized damper(s) on the outdoor air ventilation duct(s) is closed.

Variable ventilation. CFI ventilation systems shall incorporate controls that track outdoor air ventilation run time, and either open or close the required motorized damper(s) depending on whether or not outdoor air ventilation is required for compliance with Section 150.0(o)1C. During periods when comfort conditioning is not called for by the space-conditioning thermostat, the CFI ventilation system controls shall operate the space-conditioning system central fan and outdoor air damper(s) when necessary to ensure compliance with the minimum outdoor air ventilation required by Section 150.0(o) in accordance with applicable variable mechanical ventilation methods specified in ASHRAE 62.2 Section 4.5.
Whole-dwelling unit mechanical ventilation for single-family detached and townhouses. Single- family detached dwelling units, and attached dwelling units not sharing ceilings or floors with other dwelling units, occupiable spaces, public garages, or commercial spaces shall have mechanical ventilation airflow as specified in Subsections i, ii, and iii below.
Total Required Ventilation Rate [ASHRAE 62.2:4.1.1].
The total required ventilation rate shall be calculated using Equation 150.0-B.
Qtot = 0.03Afloor + 7.5(Nbr + 1)	(Equation 150.0-B)

where		
Qtot	=	total required ventilation rate, cfm	
Afloor	=	dwelling-unit floor area, ft2	
Nbr	=	number of bedrooms (not to be less than 1)	
Effective Annual Average Infiltration Rate. The effective annual average infiltration rate shall be determined in accordance with Subsections a and b:
An enclosure leakage rate in cubic feet per minute at 50 Pa (0.2 inch water) (Q50) shall be determined by either Subsection 1, or Subsection 2 below.
Q50 shall be calculated based on the conditioned volume of the dwelling unit and a default value for dwelling unit envelope leakage of 2 air changes per hour at 50 PA (0.2 inch water) (2 ACH50) as specified by equation 150.0-C below.
Q50 = Vdu x 2 ACH50/60 min
(Equation 150.0-C)
where
Q50	=	leakage rate at 50 Pa.
Vdu	=	dwelling unit conditioned volume, ft3.
ACH50	=air changes per hour at 50 Pa (0.2 inch water).
If dwelling unit envelope leakage less than 2 ACH50 is confirmed by field verification and diagnostic testing, Q50 shall be calculated according to Equation 150.0-D below, using the value for dwelling unit envelope leakage less than 2 ACH50 verified by the procedures specified in Reference Residential Appendix RA3.8.
Q50 = Vdu x Verified ACH50/60 min

(Equation 150.0-D)
where
Q50 = leakage rate at 50 Pa
Vdu	=	dwelling unit conditioned volume, ft3.
ACH50	=	air changes per hour at 50 Pa (0.2 inch water).
The Effective Annual Average Infiltration Rate (Qinf) shall be calculated using Equation 150.0-E [ASHRAE 62.2:4.1.2.1].
Qinf = 0.052 × Q50 × wsf × [H/Hr]z	(Equation 150.0-E) where
Qinf = effective annual infiltration rate, cfm (L/s)
Q50 = leakage rate at 50 Pa from equation 150.0-C, or equation 150.0-D
wsf = weather and shielding factor from Table 150.0-D
H = vertical distance between the lowest and highest above-grade points within the pressure boundary, ft (m)
Hr = reference height, 8.2 ft (2.5 m)
z = 0.4 for the purpose of calculating the Effective Annual Average Infiltration Rate
Required Mechanical Ventilation Rate [ASHRAE 62.2:4.1.2]
The Required Mechanical Ventilation Rate (Qfan) shall be calculated using Equation 150.0-F. Qfan = Qtot – F (Qinf × Aext)
(Equation 150.0-F) where
Qfan =	required mechanical ventilation rate, cfm (L/s).
Qtot =	total required ventilation rate, cfm (L/s) from Equation 150.0-B.
Qinf =	effective annual average infiltration rate, cfm (L/s) from Equation 150.0-E.
Aext =	1 for single-family detached homes, or the ratio of exterior envelope surface area that is not attached to garages or other dwelling units to total envelope surface area for attached dwelling units not sharing ceilings or floors with other dwelling units, occupiable spaces, public garages, or commercial spaces.
F	=	1 for balanced ventilation systems and Qinf/Qtot otherwise.
Air filtration. Air filtration shall conform to the specifications in Section 150.0(m)12. Compliance with ASHRAE 62.2 Sections 6.7 (Minimum Filtration) and 6.7.1 (Filter Pressure Drop) shall not be required.
Reserved.
Reserved.
Local mechanical exhaust. A local mechanical exhaust system shall be installed in each kitchen and bathroom. Systems shall be rated for airflow in accordance with ASHRAE 62.2 Section 7.1.
Nonenclosed kitchens shall have a demand-controlled mechanical exhaust system meeting the requirements of Section 150.0(o)1Giii.

Enclosed kitchens and all bathrooms shall have either one of the following alternatives a or b:
A demand-controlled mechanical exhaust system meeting the requirements of Section 150.0(o)1Giii.
A continuous mechanical exhaust system meeting the requirements of Section 150.0(o)1Giv.
Demand-controlled mechanical exhaust. A local mechanical exhaust system shall be designed to be operated as needed.
Control and operation. Demand-controlled mechanical exhaust systems shall be provided with at least one of the following controls:
A readily accessible occupant-controlled ON-OFF control.
An automatic control that does not impede occupant ON control.
Ventilation rate and capture efficiency. The system shall meet or exceed either the minimum airflow in accordance with Table 150.0-E or the minimum capture efficiency in accordance with Table 150.0-E, and Table 150.0-G. Capture efficiency ratings shall be determined in accordance with ASTM E3087 and listed in a product directory approved by the Energy Commission.
Continuous mechanical exhaust. A mechanical exhaust system shall be installed to operate continuously. The system may be part of a balanced mechanical ventilation system.
Control and operation. A manual ON-OFF control shall be provided for each continuous mechanical exhaust system. The system shall be designed to operate during all occupiable hours. The ON-OFF control shall be accessible to the dwelling unit occupant.
Ventilation rate. The minimum delivered ventilation shall be at least the amount indicated in Table 150.0-F during each hour of operation.
Airflow measurement of local mechanical exhaust by the system installer. The airflow required by Section 150.0(o)1G is the quantity of indoor air exhausted by the ventilation system as installed in the dwelling unit. When a vented range hood utilizes a capture efficiency rating to demonstrate compliance with Section 150.0(o)1Giiib, the airflow listed in the approved directory corresponding to the compliant capture efficiency rating point shall be met by the installed system. The as-installed airflow shall be verified by the system installer to ensure compliance by use of either Subsection a or b below:
The system installer shall measure the airflow by using a flow hood, flow grid or other airflow measuring device at the mechanical ventilation fan’s inlet terminals/grilles or outlet terminals/grilles in accordance with the procedures in Reference Residential Appendix RA3.7.
As an alternative to performing an airflow measurement of the system as installed in the dwelling unit, compliance may be demonstrated by installing an exhaust fan and duct system that conforms to the specifications of Table 150.0-H. Visual inspection shall verify the installed system conforms to the requirements of Table 150.0-H.
When using Table 150.0-H for demonstrating compliance, the airflow rating shall be greater than or equal to the value required by Section 150.0(o)1G at a static pressure greater than or equal to 0.25 in. of water (62.5 Pa). When a vented range hood utilizes a capture efficiency rating to demonstrate compliance with Section 150.0(o)1Giiib, a static pressure greater than or equal to 0.25 in. of water at the rating point shall not be required, and the airflow listed in the approved directory corresponding to the compliant capture efficiency rating point shall be applied to Table 150.0-H for determining compliance.
Use of Table 150.0-H is limited to ventilation systems that conform to all of the following three specifications:
Total duct length is less than or equal to 25 ft (8 m),

Duct system has no more than three elbows, and
Duct system has exterior termination fitting with a hydraulic diameter greater than or equal to the minimum duct diameter and not less than the hydraulic diameter of the fan outlet.
Sound ratings for local mechanical exhaust. Local mechanical exhaust systems shall be rated for sound in accordance with Section 7.2 of ASHRAE 62.2 at no less than the minimum airflow rate required by Section 150.0(o)1G.
Exception to Section 150.0(o)1Gvi: Kitchen range hoods may be rated for sound at no less than 100 cfm at a static pressure determined at working speed as specified in HVI 916 section 7.2.
Airflow measurement of whole-dwelling unit ventilation. The airflow required by Section 150.0(o)1C is the quantity of outdoor ventilation air supplied or indoor air exhausted by the mechanical ventilation system as installed and shall be measured by using a flow hood, flow grid or other airflow measuring device at the mechanical ventilation fan’s inlet terminals/grilles or outlet terminals/grilles in accordance with the procedures in Reference Residential Appendix RA3.7. Balanced mechanical ventilation system airflow shall be the average of the supply fan and exhaust fan flows.
Sound ratings for whole-dwelling unit ventilation systems. Whole-dwelling unit ventilation systems shall be rated for sound in accordance with Section 7.2 of ASHRAE 62.2 at no less than the minimum airflow rate required by Section 150.0(o)1C.
Label for whole-dwelling unit ventilation system on-off control. Compliance with ASHRAE 62.2 Section 4.4 (Control and Operation) shall require manual ON-OFF control switches associated with whole-dwelling unit ventilation systems to have a label clearly displaying the following text, or equivalent text: “This switch controls the indoor air quality ventilation for the home. Leave switch in the ‘on’ position at all times unless the outdoor air quality is very poor.”
Combustion air and compensating outdoor air or makeup air.
All dwelling units shall conform to the applicable requirements specified in California Mechanical Code Chapter 7, Combustion Air.
All dwelling units shall conform to the requirements in ASHRAE 62.2 Section 6.4, Combustion and Solid-Fuel-Burning Appliances.
Field verification and diagnostic testing.
Whole-dwelling unit ventilation airflow performance. The whole-dwelling unit ventilation airflow required by Section 150.0(o)1C shall be confirmed through field verification and diagnostic testing in accordance with the applicable procedures specified in Reference Residential Appendix RA3.7. Balanced mechanical ventilation system airflow shall be the average of the supply fan and exhaust fan flows. Ventilation airflow of systems with multiple operating modes shall be tested in all modes designed to comply with the required ventilation airflows.
Kitchen local mechanical exhaust—vented range hoods. Vented range hoods installed to comply with local mechanical exhaust requirements specified in Section 150.0(o)1G shall be field verified in accordance with the procedures in Reference Residential Appendix RA3.7.4.3 to confirm the model is rated by HVI or AHAM to comply with the following requirements:
The minimum ventilation airflow rate as specified by Section 150.0(o)1G, or alternatively the minimum capture efficiency as specified by Section 150.0(o)1G.
ii	The maximum sound rating as specified in Section 150.0(o)1Gvi.
Heat recovery ventilation (HRV) and energy recovery ventilation (ERV) system fan efficacy. Systems with heat or energy recovery serving a single dwelling unit shall have a fan efficacy of ≤1.0 W/cfm as confirmed by HERS field verification in accordance with Reference Appendix RA3.7.4.4.

Pool systems and equipment installation. Any residential pool system or equipment installed shall comply with the applicable requirements of Section 110.4, as well as the requirements listed in this section.
Pump sizing and flow rate.
All installed pumps and pump motors subject to State or federal appliance standards shall be listed in the Commission’s directory of certified equipment and shall comply with the Appliance Efficiency Regulations.
All pump flow rates shall be calculated using the following system equation:
H = C × F2
where:
H is the total system head in feet of water.
F is the flow rate in gallons per minute (gpm).
C is a coefficient based on the volume of the pool: 0.0167 for pools less than or equal to 17,000 gallons. 0.0082 for pools greater than 17,000 gallons.
Filtration pumps shall be sized, or if programmable shall be programmed, so that the filtration flow rate is not greater than the rate needed to turn over the pool water volume in 6 hours or 36 gpm, whichever is greater; and
Pump motors used for filtration shall meet the applicable federal standard in 10 CFR 431.465; and
Each auxiliary pool load shall be served by either separate pumps, or the system shall be served by a multispeed pump; and
Exception to Section 150.0(p)1E: Pumps less than 1 hp may be single speed.
Multispeed pumps shall have controls which default to the filtration flow rate when no auxiliary pool loads are operating; and
For multispeed pumps, the controls shall default to the filtration flow rate setting within 24 hours and shall have an override capability for servicing.
System piping.
A length of straight pipe that is greater than or equal to at least 4 pipe diameters shall be installed before the pump; and
Pool piping shall be sized so that the velocity of the water at maximum flow for auxiliary pool loads does not exceed 8 feet per second in the return line and 6 feet per second in the suction line; and
All elbows shall be sweep elbows or of an elbow-type that has a pressure drop of less than the pressure drop of straight pipe with a length of 30 pipe diameters.
Filters. Filters shall be at least the size specified in NSF/ANSI 50 for public pool intended applications.
Valves. Minimum diameter of backwash valves shall be 2 inches or the diameter of the return pipe, whichever is greater.
Fenestration products. Fenestration separating conditioned space from unconditioned space or outdoors shall meet the requirements of either Item 1 or 2 below:
Fenestration, including skylight products, must have a maximum U-factor of 0.45.
Exception 1 to Section 150.0(q)1: Up to 10 square feet of fenestration area or 0.5 percent of the conditioned floor area, whichever is greater, is exempt from the maximum U-factor requirement.

Exception 2 to Section 150.0(q)1: For dual-glazed greenhouse or garden windows, up to 30 square feet of fenestration area is exempt from the maximum U-factor requirement.
The area-weighted average U-factor of all fenestration, including skylight products shall not exceed 0.45.
Solar ready buildings. shall meet the requirements of Section 110.10 applicable to the building project.
Energy Storage Systems (ESS) ready. All single-family residences that include one or two dwelling units shall meet the following. All electrical components shall be installed in accordance with the California Electrical Code:
At least one of the following shall be provided:
ESS ready interconnection equipment with a minimum backed-up capacity of 60 amps and a minimum of four ESS-supplied branch circuits, or
A dedicated raceway from the main service to a panelboard (subpanel) that supplies the branch circuits in Section 150.0(s)(2). All branch circuits are permitted to be supplied by the main service panel prior to the installation of an ESS. The trade size of the raceway shall be not less than one inch. The panelboard that supplies the branch circuits (subpanel) must be labeled “Subpanel shall include all backed-up load circuits.”
A minimum of four branch circuits shall be identified and have their source of supply collocated at a single panelboard suitable to be supplied by the ESS. At least one circuit shall supply the refrigerator, one lighting circuit shall be located near the primary egress, and at least one circuit shall supply a sleeping room receptacle outlet.
The main panelboard shall have a minimum busbar rating of 225 amps.
Sufficient space shall be reserved to allow future installation of a system isolation equipment/transfer switch within 3 feet of the main panelboard. Raceways shall be installed between the panelboard and the system isolation equipment/transfer switch location to allow the connection of backup power source.
Heat pump space heater ready. Systems using gas or propane furnace to serve individual dwelling units shall include the following:
1. A dedicated 240 volt branch circuit wiring shall be installed within 3 feet from the furnace and accessible to the furnace with no obstructions. The branch circuit conductors shall be rated at 30 amps minimum. The blank cover shall be identified as “240V ready.” All electrical components shall be installed in accordance with the California Electrical Code.
2. The main electrical service panel shall have a reserved space to allow for the installation of a double pole circuit breaker for a future heat pump space heater installation. The reserved space shall be permanently marked as “For Future 240V use.”
Electric cooktop ready. Systems using gas or propane cooktop to serve individual dwelling units shall include the following:
A dedicated 240 volt branch circuit wiring shall be installed within 3 feet from the cooktop and accessible to the cooktop with no obstructions. The branch circuit conductors shall be rated at 50 amps minimum. The blank cover shall be identified as “240V ready.” All electrical components shall be installed in accordance with the California Electrical Code.
The main electrical service panel shall have a reserved space to allow for the installation of a double pole circuit breaker for a future electric cooktop installation. The reserved space shall be permanently marked as “For Future 240V use.”
Electric clothes dryer ready. Clothes dryer locations with gas or propane plumbing to serve individual dwelling units shall include the following:
A dedicated 240 volt branch circuit wiring shall be installed within 3 feet from the clothes dryer location and accessible to the clothes dryer location with no obstructions. The branch circuit conductors shall be

rated at 30 amps minimum. The blank cover shall be identified as “240V ready.” All electrical components shall be installed in accordance with the California Electrical Code.
The main electrical service panel shall have a reserved space to allow for the installation of a double pole circuit breaker for a future electric clothes dryer installation. The reserved space shall be permanently marked as “For Future 240V use.”

TABLE 150.0-A	CLASSIFICATION OF HIGH LUMINOUS EFFICACY LIGHT SOURCES
Light sources in this column other that those installed in ceiling recessed downlight luminaires are classified as high luminous efficacy and are not required to
comply with Reference Joint Appendix JA8.	Light sources in this column are required to comply with Reference Joint Appendix JA8 and shall be certified and marked as required by JA8.	
LED light sources installed outdoors.
Inseparable Solid State Lighting (SSL) luminaires containing colored light sources that are installed to provide decorative lighting.
Pin-based linear fluorescent or compact fluorescent light sources using electronic ballasts.
High intensity discharge (HID) light sources including pulse start metal halide and high pressure sodium light sources.
Luminaires with hardwired high frequency generator and induction lamp.
Ceiling Fan Light Kits subject to federal appliance regulations.	All light sources installed in ceiling recessed downlight luminaires. Note that ceiling recessed downlight luminaires shall not have screw base sockets regardless of lamp type as specified in Section 150.0(k)1C.
Any light source not otherwise listed in this table.	

TABLE 150.0-B: Return Duct Sizing for Single Return Duct Systems
Return duct length shall not exceed 30 feet and shall contain no more than 180 degrees of bend. If the total bending exceeds 90 degrees, one bend shall be a metal elbow.
Return grille devices shall be labeled in accordance with the requirements in Section 150.0(m)12Biv to disclose the grille’s design airflow rate and a maximum allowable clean-filter pressure drop of 25 Pa (0.1 inches water) for the air filter when tested using ASHRAE Standard 52.2, or as rated in accordance with AHRI Standard 680 for the design airflow rate for the return grille.	
SYSTEM NOMINAL COOLING CAPACITY (Ton)*	RETURN DUCT MINIMUM NOMINAL DIAMETER
(inch)	MINIMUM TOTAL RETURN FILTER GRILLE NOMINAL AREA
(inch2)	
1.5	16	500	
2.0	18	600	
2.5	20	800	
*Not applicable to systems with nominal cooling capacity greater than 2.5 tons or less than 1.5 ton.

TABLE 150.0-C: Return Duct Sizing for Multiple Return Duct Systems
Each return duct length shall not exceed 30 feet and shall contain no more than 180 degrees of bend. If the total bending exceeds 90 degrees,°, one bend shall be a metal elbow.
Return grille devices shall be labeled in accordance with the requirements in Section 150.0(m)12Biv to disclose the grille’s design airflow rate and a maximum allowable clean-filter pressure drop of 25 Pa (0.1 inches water) for the air filter when tested using ASHRAE Standard 52.2, or as rated in accordance with
AHRI Standard 680 for the design airflow rate for the return grille.	
System Nominal Cooling Capacity (Ton)*	Return Duct 1
Minimum Nominal Diameter (inch)	Return Duct 2
Minimum Nominal Diameter (inch)	Minimum Total Return Filter Grille Nominal Area
(inch2)	
1.5	12	10	500	
2.0	14	12	600	
2.5	14	14	800	
3.0	16	14	900	
3.5	16	16	1000	
4.0	18	18	1200	
5.0	20	20	1500	

TMY3	Wsf	Weather Station	Latitude	Longitude	State	
690150	0.50	Twentynine Palms	34.30	–116.17	California	
722860	0.43	March AFB	33.90	–117.25	California	
722868	0.45	Palm Springs Intl	33.83	–116.50	California	
722869	0.42	Riverside Muni	33.95	–117.45	California	
722880	0.39	Burbank–Glendale–Pasadena AP	34.20	–118.35	California	
722885	0.39	Santa Monica Muni	34.02	–118.45	California	
722886	0.39	Van Nuys Airport	34.22	–118.48	California	
722895	0.55	Lompoc (AWOS)	34.67	–120.47	California	
722897	0.51	San Luis Co Rgnl	35.23	–120.63	California	
722899	0.45	Chino Airport	33.97	–117.63	California	
722900	0.38	San Diego Lindbergh Field	32.73	–117.17	California	
722903	0.39	San Diego/Montgomery	32.82	–117.13	California	
722904	0.40	Chula Vista Brown Field NAAS	32.58	–116.98	California	
722906	0.39	San Diego North Island NAS	32.70	–117.20	California	
722926	0.40	Camp Pendleton MCAS	33.30	–117.35	California	
722927	0.38	Carlsbad/Palomar	33.13	–117.28	California	
722930	0.39	San Diego Miramar NAS	32.87	–117.13	California	

*Not applicable to systems with nominal cooling capacity greater than 5.0 tons or less than 1.5 tons. TABLE 150.0-D: Infiltration Effectiveness Weather and Shielding Factors [ASHRAE 62.2:Table B1]

TABLE 150.0-D: Infiltration Effectiveness Weather and Shielding Factors [ASHRAE 62.2:Table B1] (continued)
722950	0.42	Los Angeles Intl Arpt	33.93	–118.40	California	
722956	0.38	Jack Northrop Fld H	33.92	–118.33	California	
722970	0.38	Long Beach Daugherty Fld	33.83	–118.17	California	
722976	0.34	Fullerton Municipal	33.87	–117.98	California	
722977	0.36	Santa Ana John Wayne AP	33.68	–117.87	California	
723805	0.51	Needles Airport	34.77	–114.62	California	
723810	0.59	Edwards AFB	34.90	–117.87	California	
723815	0.58	Daggett Barstow–Daggett AP	34.85	–116.80	California	
723816	0.62	Lancaster Gen Wm Fox Field	34.73	–118.22	California	
723820	0.57	Palmdale Airport	34.63	–118.08	California	
723830	0.68	Sandberg	34.75	–118.72	California	
723840	0.43	Bakersfield Meadows Field	35.43	–119.05	California	
723890	0.45	Fresno Yosemite Intl AP	36.78	–119.72	California	
723895	0.42	Porterville (AWOS)	36.03	–119.07	California	
723896	0.43	Visalia Muni (AWOS)	36.32	–119.40	California	
723910	0.45	Point Mugu Nf	34.12	–119.12	California	
723925	0.44	Santa Barbara Municipal AP	34.43	–119.85	California	
723926	0.43	Camarillo (AWOS)	34.22	–119.08	California	
723927	0.45	Oxnard Airport	34.20	–119.20	California	
723940	0.52	Santa Maria Public Arpt	34.92	–120.47	California	
723965	0.53	Paso Robles Municipal Arpt	35.67	–120.63	California	
724800	0.55	Bishop Airport	37.37	–118.35	California	
724815	0.46	Merced/Macready Fld	37.28	–120.52	California	
724830	0.51	Sacramento Executive Arpt	38.50	–121.50	California	
724837	0.45	Beale AFB	39.13	–121.43	California	
724838	0.50	Yuba Co	39.10	–121.57	California	
724839	0.51	Sacramento Metropolitan AP	38.70	–121.58	California	
724915	0.49	Monterey Naf	36.60	–121.87	California	
724917	0.54	Salinas Municipal AP	36.67	–121.60	California	
724920	0.50	Stockton Metropolitan Arpt	37.90	–121.23	California	
724926	0.47	Modesto City–County AP	37.63	–120.95	California	
724927	0.53	Livermore Municipal	37.70	–121.82	California	
724930	0.54	Oakland Metropolitan Arpt	37.72	–122.22	California	
724935	0.47	Hayward Air Term	37.67	–122.12	California	
724936	0.53	Concord–Buchanan Field	38.00	–122.05	California	
724940	0.60	San Francisco Intl AP	37.62	–122.40	California	
724945	0.48	San Jose Intl AP	37.37	–121.93	California	
724955	0.55	Napa Co. Airport	38.22	–122.28	California	
724957	0.49	Santa Rosa (AWOS)	38.52	–122.82	California	

TABLE 150.0-D: Infiltration Effectiveness Weather and Shielding Factors [ASHRAE 62.2:Table B1] (continued)
TMY3	wsf	Weather Station	Latitude	Longitude	State	
725845	0.44	Blue Canyon AP	39.30	–120.72	California	
725846	0.66	Truckee–Tahoe	39.32	–120.13	California	
725847	0.64	South Lake Tahoe	38.90	–120.00	California	
725905	0.47	Ukiah Municipal AP	39.13	–123.20	California	
725910	0.50	Red Bluff Municipal Arpt	40.15	–122.25	California	
725920	0.47	Redding Municipal Arpt	40.52	–122.32	California	
725945	0.56	Arcata Airport	40.98	–124.10	California	
725946	0.60	Crescent City Faa Ai	41.78	–124.23	California	
725955	0.55	Montague Siskiyou County AP	41.78	–122.47	California	
725958	0.59	Alturas	41.50	–120.53	California	
745090	0.45	Mountain View Moffett Fld NAS	37.40	–122.05	California	
745160	0.67	Travis Field AFB	38.27	–121.93	California	
746120	0.52	China Lake Naf	35.68	–117.68	California	
747020	0.50	Lemoore Reeves NAS	36.33	–119.95	California	
747185	0.46	Imperial	32.83	–115.58	California	
747187	0.46	Palm Springs Thermal AP	33.63	–116.17	California	
747188	0.48	Blythe Riverside Co Arpt	33.62	–114.72	California	

Table 150.0-E Demand-Controlled Local Ventilation Exhaust Airflow Rates and Capture Efficiency
Application	Compliance Criteria	
Enclosed Kitchen or Nonenclosed Kitchen	Vented range hood, including appliance-range hood combinations shall meet either the capture efficiency (CE) or the airflow rate specified in Table 150.0-G as applicable.	
Enclosed Kitchen	Other kitchen exhaust fans, including downdraft: 300 cfm (150 L/s) or a capacity of 5 ACH	
Nonenclosed Kitchen	Other kitchen exhaust fans, including downdraft: 300 cfm (150 L/s)	
Bathroom	50 cfm (25 L/s)	

Table 150.0-F Continuous Local Ventilation Exhaust Airflow Rates
Application	Airflow	
Enclosed kitchen	5 ach, based on kitchen volume	
Bathroom	20 cfm (10 L/s)	

Table 150.0-G Kitchen Range Hood Airflow Rates (cfm) and ASTM E3087 Capture Efficiency (CE) Ratings According to Dwelling Unit Floor Area and Kitchen Range Fuel Type
Dwelling Unit Floor Area (ft2)	Hood Over Electric Range	Hood Over Natural Gas Range	
>1500	50% CE or 110 cfm	70% CE or 180 cfm	
>1000 - 1500	50% CE or 110 cfm	80% CE or 250 cfm	
750 - 1000	55% CE or 130 cfm	85% CE or 280 cfm	
<750	65% CE or 160 cfm	85% CE or 280 cfm	

Table 150.0-H Prescriptive Ventilation System Duct Sizing [ASHRAE 62.2:Table 5-3]
Fan Airflow Rating, cfm at minimum static pressuref 0.25 in. water
(L/s at minimum 62.5 Pa)	
≤50
(25)	
≤80
(40)	
≤100
(50)	
≤125 (60)	
≤150 (70)	
≤175 (85)	
≤200 (95)	
≤250 (120)	
≤350 (165)	
≤400
(190)	
≤450 (210)	
≤700 (330)	
≤800 (380)	
Minimum Duct Diameter, in. (mm) a,b For Rigid duct	4 e
(100)	5
(125)	5
(125)	6
(150)	6
(150)	7
(180)	7
(180)	8
(205)	9
(230)	10
(255)	10
(255)	12
(305)	12 d
(305)	
Minimum Duct Diameter, in. (mm) a,b For Flex duct c	4
(100)	5
(125)	6
(150)	6
(150)	7
(150)	7
(180)	8
(205)	8
(205)	9
(230)	10
(255)	NP	NP	NP	
Footnotes for Table 150.0-H:
For noncircular ducts, calculate the diameter as four times the cross-sectional area divided by the perimeter.
NP = application of the prescriptive table is not permitted for this scenario.
Use of this table for verification of flex duct systems requires flex duct to be fully extended and any flex duct elbows to have a minimum bend radius to duct diameter ratio of 1.0.
For this scenario, use of elbows is not permitted.
For this scenario, 4 in. (100 mm) oval duct shall be permitted, provided the minor axis of the oval is greater than or equal to 3 in. (75 mm)
When a vented range hood utilizes a capture efficiency rating to demonstrate compliance with 150.0(o)1Giiib, a static pressure greater than or equal to 0.25 in. of water at the rating point shall not be required, and the airflow listed in the approved directory corresponding to the compliant capture efficiency rating point shall be applied to Table 150.0-H for determining compliance.

Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and 25943, Public Resources Code.

SUBCHAPTER 8
SINGLE-FAMILY RESIDENTIAL BUILDINGS - PERFORMANCE AND PRESCRIPTIVE COMPLIANCE APPROACHES

SECTION 150.1 – PERFORMANCE AND PRESCRIPTIVE COMPLIANCE APPROACHES FOR SINGLE-FAMILY RESIDENTIAL BUILDINGS
Basic Requirements. Single-family residential buildings shall meet all of the following:
The applicable requirements of Sections 110.0 through 110.10.
The applicable requirements of Section 150.0 (mandatory features).
Either the performance standards or the prescriptive standards set forth in this section for the Climate Zone in which the building is located. Climate zones are shown in Reference Joint Appendix JA2 – Weather/Climate Data.
Exception to Section 150.1(a)3: If a single contiguous subdivision or tract falls in more than one Climate Zone, all buildings in the subdivision or tract may be designed to meet the performance or prescriptive standards for the climate zones that contains 50 percent or more of the dwelling units.
Note: The Commission periodically updates, publishes, and makes available to interested persons and local enforcement agencies precise descriptions of the climate zones, as specified in Reference Joint Appendix JA2 – Weather/Climate Data.
Note: The requirements of Sections 150.0(a) through 150.0(r) apply to newly constructed buildings and Sections 150.2(a) and 150.2(b) specifies changes to the requirements of Sections 150.1(a) through 150.1(c) that apply to additions or alterations.
Performance standards. A building complies with the performance standards if the energy consumption calculated for the proposed design building is no greater than the energy budget calculated for the standard design building using Commission-certified compliance software as specified by the Alternative Calculation Methods Approval Manual.
Newly constructed buildings. The Energy Budget for newly constructed buildings is expressed in terms of the Energy Design Ratings, which are based on source energy and time-dependent valuation (TDV) energy. The Energy Design Rating 1 (EDR1) is based on source energy. The Energy Design Rating 2 (EDR2) is based on TDV energy and has two components, the Energy Efficiency Design Rating, and the Solar Electric Generation and Demand Flexibility Design Rating. The total Energy Design Rating shall account for both the Energy Efficiency Design Rating and the Solar Electric Generation and Demand Flexibility Design Rating. The proposed building shall separately comply with the Source Energy Design Rating, Energy Efficiency Design Rating and the Total Energy Design Rating.
Exception to Section 150.1(b)1. A community shared solar electric generation system, or other renewable electric generation system, or community shared battery storage system, which provides dedicated power, utility energy reduction credits, or payments for energy bill reductions, to the permitted building and is approved by the Energy Commission as specified in Title 24, Part 1, Section 10-115, may offset part or all of the solar electric generation system and demand flexibility Energy Design Rating required to comply with the Standards, as calculated according to methods established by the Commission in the Residential ACM Reference Manual.
Additions and alterations to existing buildings. The energy budget for additions and alterations is expressed in terms of TDV energy.
Compliance demonstration requirements for performance standards.
Certificate of compliance and application for a building permit. The application for a building permit shall include documentation pursuant to Sections 10-103(a)1 and 10-103(a)2 which demonstrates, using an

approved calculation method, that the building has been designed so that its Energy Efficiency Design Rating and the total EDR meets or exceeds the standard design EDR for the applicable climate zone.
Exception n to Section 150.1(b)3A: Multiple orientation: A permit applicant may demonstrate compliance with the energy budget requirements of Section 150.1(a) and (b) for any orientation of the same building model if the documentation demonstrates that the building model with its proposed designs and features would comply in each of the four cardinal orientations.
Field verification. When performance of installed features, materials, components, manufactured devices or systems above the minimum specified in Section 150.1(c) is necessary for the building to comply with Section 150.1(b), or is necessary to achieve a more stringent local ordinance, field verification shall be performed in accordance with the applicable requirements in the following subsections, and the results of the verification(s) shall be documented on applicable certificates of installation pursuant to Section 10-103(a)3 and applicable certificates of verification pursuant to Section 10-103(a)5.
EER/EER2/SEER/SEER2/CEER/HSPF/HSPF2 Rating. When performance compliance requires installation of a space conditioning system with a rating that is greater than the minimum rating required by Table 150.1-A or specified for the standard design, the installed system shall be field verified in accordance with the procedures specified in the applicable sections of Reference Residential Appendix RA3.4.
Variable capacity heat pump (VCHP) compliance option. When performance compliance requires installation of a heat pump system that meets all the requirements of the VCHP compliance option specified in the ACM Reference Manual, the system shall be field verified in accordance with the procedures in Reference Residential Appendix RA3.4.4.3.
Low leakage air handler. When performance compliance requires installation of a low leakage air- handling unit, the installed air-handling unit shall be field verified in accordance with the procedures specified in Reference Residential Appendix RA3.1.4.3.9.
RESERVED
Heat pump - rated heating capacity. When performance compliance requires installation of a heat pump system, the heating capacity values at 47° F and 17° F shall be field verified in accordance with the procedures specified in Reference Residential Appendix RA3.4.
Whole-house fan. When performance compliance requires installation of a whole-house fan, the whole- house fan ventilation airflow rate and fan efficacy shall be field verified in accordance with the procedures in Reference Residential Appendix RA3.9.
Central fan ventilation cooling system. When performance compliance requires installation of a central fan ventilation cooling system, the installed system shall be field verified in accordance with the procedures in Reference Residential Appendix RA3.3.4.
Building enclosure air leakage. When performance compliance requires a building enclosure leakage rate that is lower than the standard design, the building enclosure shall be field verified in accordance with the procedures specified in Reference Residential Appendix RA3.8.
Quality Insulation Installation (QII). When performance compliance requires field verification of QII, the building insulation system shall be field verified in accordance with the procedures in Reference Residential Appendix RA3.5.
Prescriptive standards/component packages. Buildings that comply with the prescriptive standards shall be designed, constructed and equipped to meet all of the requirements for the appropriate climate zone shown in Table 150.1-A. In Table 150.1-A, NA (not allowed) means that feature is not permitted in a particular climate zone and NR (no requirement) means that there is no prescriptive requirement for that feature in a particular climate zone. Installed components shall meet the following requirements:

SECTION 150.1 – PERFORMANCE AND PRESCRIPTIVE COMPLIANCE APPROACHES FOR SINGLE-FAMILY RESIDENTIAL

Insulation.
Roof and ceiling insulation shall be installed in a ventilated attic with an R-value equal to or greater than that shown in Table 150.1-A meeting options ii or iii below.
Option A: RESERVED.
Option B: A minimum R-value of insulation installed between the roof rafters in contact with the roof deck and an additional layer of ceiling insulation located between the attic and the conditioned space when meeting Section 150.1(c)9A; or
Option C: A minimum R-value of ceiling insulation located between the attic and the conditioned space when meeting Section 150.1(c)9B.
Note: Low rise residential single- family buildings with the ducts and air handler located in the conditioned space, as specified by Section 150.1(c)9B, need only comply with insulation requirements of Option C.
Walls.
Framed exterior walls shall be insulated such that the exterior wall has an assembly U-factor equal to or less than that shown in Table 150.1-A. The U-factors shown are maximum U-factors for the exterior wall assembly.
Mass walls above grade and below grade shall be insulated such that the wall has an assembly U-factor equal to or less than that shown in Table 150.1-A, or walls shall be insulated with continuous insulation that has an R-value equal to or greater than that shown in Table 150.1-A. “Interior” denotes continuous insulation installed on the inside surface of the wall, and “exterior” denotes continuous insulation installed on the outside surface of the wall.
Other unframed exterior walls, excluding mass walls, shall meet the requirements for framed walls shown in Table 150.1-A.
Raised-floors shall be insulated such that the floor assembly has an assembly U-factor equal to or less than shown in Table 150.1-A, or shall be insulated between wood framing with insulation having an R-value equal to or greater than that shown in Table 150.1-A.
Exception to Section 150.1(c)1C: Raised-floor insulation may be omitted if the foundation walls are insulated to meet the wall insulation minimums shown in Table 150.1-A, and a vapor retarder is placed over the entire floor of the crawl space, and the vents are fitted with automatically operated louvers, and the requirements of Reference Residential Appendix RA4.5.1 are met.
Slab floor perimeter insulation shall be installed with a U-factor equal to or less than, or R-value equal to or greater than shown in TABLE 150.1-A. The minimum depth of concrete-slab floor perimeter insulation shall be 16 inches or the depth of the footing of the building, whichever is less.
Exception to Section 150.1(c)1: The insulation requirements of Tables 150.1-A may also be met by ceiling, roof deck, wall, or floor assemblies that meet the required maximum U-factors using a U-factor calculation method that considers the thermal effects of all elements of the assembly and is approved by the Executive Director.
All buildings shall comply with the Quality Insulation Installation (QII) requirements shown in Table 150.1-A. When QII is required, insulation installation shall meet the criteria specified in Reference Appendix RA3.5.
Radiant barrier. A radiant barrier required in Table 150.1-A shall meet the requirements specified in Section 110.8(j), and shall meet the installation criteria specified in the Reference Residential Appendix RA4.

Fenestration.
Installed fenestration products, including glazed doors, shall have an area -weighted average U-factor and Solar Heat Gain Coefficient (SHGC) meeting the applicable fenestration value in Table 150.1-A and shall be determined in accordance with Sections 110.6(a)2 and 110.6(a)3.
Exception 1 to Section 150.1(c)3A: For each dwelling unit, up to 3 square feet of new glazing area installed in doors and up to 3 square feet of new tubular skylights area with dual-pane diffusers shall not be required to meet the U-factor and SHGC requirements of Table 150.1-A.
Exception 2 to Section 150.1(c)3A: For each dwelling unit up to 16 square feet of new skylight area with a maximum U-factor of 0.55 and a maximum SHGC of 0.30.
Exception 3 to Section 150.1(c)3A For fenestration containing chromogenic type glazing:
The lower-rated labeled U-factor and SHGC shall be used with automatic controls to modulate the amount of solar gain and light transmitted into the space in multiple steps in response to daylight levels or solar intensity;
Chromogenic glazing shall be considered separately from other fenestration; and
Area-weighted averaging with other fenestration that is not chromatic shall not be permitted and shall be determined in accordance with Section 110.6(a).
EXCEPTION 4 to Section 150.1(c)3A: For dwelling units containing unrated site-built fenestration that meets the maximum area restriction, the U-factor and SHGC can be determined in accordance with the Nonresidential Reference Appendix NA6 or use default values in Table 110.6-A and Table 110.6-B.
The maximum total fenestration area shall not exceed the percentage of conditioned floor area, CFA, as indicated in TABLE 150.1-A. Total fenestration includes skylights and west-facing glazing.
The maximum west-facing fenestration area shall not exceed the percentage of conditioned floor area as indicated in TABLE 150.1-A. West-facing fenestration area includes skylights tilted in any direction when the pitch is less than 1:12.
Shading. Where Table 150.1-A requires a maximum SHGC, the requirements shall be met by one of the following:
Complying with the required SHGC pursuant to Section 150.1(c)3A; or
An exterior operable shading louver or other exterior shading device that meets the required SHGC; or
A combination of Items A and B to achieve the same performance as achieved in Section 150.1(c)3A.
For south-facing glazing only, optimal overhangs shall be installed so that the south-facing glazing is fully shaded at solar noon on August 21 and substantially exposed to direct sunlight at solar noon on December 21.
Exterior shading devices must be permanently secured with attachments or fasteners that are not intended for removal.
Exception to Section 150.1(c)4E: Where the California Building Code (CBC) requires emergency egress or where compliance would conflict with health and safety regulations.
Doors. Installed swinging door products separating conditioned space from outside or adjacent unconditioned space, but not including glazed door products, shall have an area-weighted average U-factor no greater than the applicable door value in Table 150.1-A and shall be determined in accordance with Section 110.6(a)2. Glazed door products are treated as fenestration products in Sections 150.1(c)3 and 150.1(c)4.
Exception to Section 150.1(c)5: Swinging doors between the garage and conditioned space that are required to have fire protection are not required to meet the applicable door value in Table 150.1-A.
Heating system type. Heating system types shall be installed as required in Table 150.1-A. For climate zones 3, 4, 13 and 14, the space conditioning system shall be a heat pump, or shall meet the performance compliance requirements of Section 150.1(b)1.

SECTION 150.1 – PERFORMANCE AND PRESCRIPTIVE COMPLIANCE APPROACHES FOR SINGLE-FAMILY RESIDENTIAL

Exception to Section 150.1(c)6: A supplemental heating unit may be installed in a space served directly or indirectly by a primary heating system, provided that the unit thermal capacity does not exceed 2 kW or 7,000 Btu/hr and is controlled by a time-limiting device not exceeding 30 minutes.
Space heating and space cooling. All space heating and space cooling equipment shall comply with minimum Appliance Efficiency Regulations as specified in Sections 110.0 through 110.2 and meet all applicable requirements of Sections 150.0 and 150.1(c)7A.
Refrigerant charge. When refrigerant charge verification or fault indicator display is shown as required by Table 150.1-A, the system shall comply with either Section 150.1(c)7Ai or 150.1(c)7Aii:
air-cooled air conditioners and air-source heat pumps, including but not limited to ducted split systems, ducted packaged systems, small duct high velocity systems, and mini-split systems, shall comply with subsections a, b and c, unless the system is of a type that cannot be verified using the specified procedures:
Have measurement access holes (MAH) installed according to the specifications in Reference Residential Appendix Section RA3.2.2.3; and
Exception to Section 150.1(c)7Aia: Systems that cannot conform to the specifications for hole location in Reference Residential Appendix Figure RA3.2-1, shall not be required to provide holes as described in Figure RA3.2-1.
System airflow rate in accordance with subsection I or II shall be confirmed through field verification and diagnostic testing in accordance with all applicable procedures specified in Reference Residential Appendix Section RA3. 3 or an approved alternative procedure as specified by Section RA1; and
For small duct high velocity systems the system airflow rate shall be greater than or equal to 250 cfm per ton; or
For all other air-cooled air conditioner or air-source heat pump systems the system airflow rate shall be greater than or equal to 350 cfm per ton.
Exception to Section 150.1(c)7Aib: Standard ducted systems without zoning dampers may comply with the minimum airflow rate by meeting the applicable requirements in Table-150.0-B or 150.0-C as confirmed by field verification and diagnostic testing in accordance with the procedures in Reference Residential Appendix Section RA3.1.4.4 and RA3.1.4.5. The design clean-filter pressure drop requirements of Section 150.0(m)12D for the system air filter device(s) shall conform to the requirements given in Tables 150.0-B and 150.0-C.
The installer shall charge the system according to manufacturer’s specifications. Refrigerant charge shall be verified according to one of the following options, as applicable:
The installer and rater shall perform the standard charge procedure as specified by Reference Residential Appendix Section RA3.2.2, or an approved alternative procedure as specified by Section RA1; or
The system shall be equipped with a fault indicator display (FID) device that meets the specifications of Reference Joint Appendix JA6. The installer shall verify the refrigerant charge and FID device in accordance with the procedures in Reference Residential Appendix Section RA3.4.2. The HERS Rater shall verify FID device in accordance with the procedures in Section RA3.4.2; or
The installer shall perform the weigh-in charging procedure as specified by Reference Residential Appendix Section RA3.2.3.1 provided the system is of a type that can be verified using the Section RA3.2.2 standard charge verification procedure and Section RA3.3 airflow rate verification procedure or approved alternatives in Section RA1. The HERS Rater shall verify the charge using Sections RA3.2.2 and RA3.3 or approved alternatives in Section RA1.
Exception 1 to Section 150.1(c)7Aic: When the outdoor temperature is less than 55°F and the installer utilizes the weigh-in charging procedure in Reference Residential Appendix Section

RA3.2.3.1 to verify the refrigerant charge, the installer may elect to utilize the HERS Rater verification procedure in Reference Residential Appendix Section RA3.2.3.2. If the HERS Rater verification procedure in Section RA3.2.3.2 is used for compliance, the system's thermostat shall conform to the specifications in Section 110.12. Ducted systems shall comply with minimum system airflow rate requirement in Section 150.1(c)7Aib.
Air-cooled air conditioners and air-source heat pumps, including but not limited to ducted split systems, ducted packaged systems, small duct high velocity systems and mini-split systems, which are of a type that cannot comply with the requirements of Section 150.1(c)7Ai shall comply with Subsections a and b, as applicable.
The installer shall confirm the refrigerant charge using the weigh-in charging procedure specified in Reference Residential Appendix Section RA3.2.3.1, as verified by a HERS Rater according to the procedures specified in Reference Residential Appendix Section RA3.2.3.2; and
Systems that utilize forced air ducts shall comply with the minimum system airflow rate requirement in Section 150.1(c)7Aib provided the system is of a type that can be verified using the procedures in Section RA3.3 or an approved alternative procedure in Section RA1.
Exception to Section 150.1(c)7A: Packaged systems for which the manufacturer has verified correct system refrigerant charge prior to shipment from the factory are not required to have refrigerant charge confirmed through field verification and diagnostic testing. The installer of these packaged systems shall certify on the Certificate of Installation that the packaged system was pre-charged at the factory and has not been altered in a way that would affect the charge. Ducted systems shall comply with minimum system airflow rate requirements in Section 150.1(c)7Aib, provided that the system is of a type that can be verified using the procedure specified in Section RA3.3 or an approved alternative in Section RA1.
Domestic water-heating systems. Water-heating systems shall meet the requirements of A, B, C, or shall meet the performance compliance requirements of Section 150.1(b)1. For recirculation distribution systems, only demand recirculation systems with manual on/off control as specified in the Reference Appendix RA4.4.9 shall be used:
A single 240 volt heat pump water heater (HPWH). The storage tank shall be located in the garage or conditioned space. In addition, meet the following:
A compact hot water distribution system as specified in the Reference Appendix RA4.4.6 in climate zone 1 and 16; and
A drain water heat recovery system that is field verified as specified in the Reference Appendix RA3.6.9 in climate zone 16.
A single 240 volt HPWH that meets the requirements of NEEA Advanced Water Heater Specification Tier 3 or higher. In addition, for Climate Zone 16, a drain water heat recovery system that is field verified as specified in the Reference Appendix RA3.6.9 and the storage tank shall be located in the garage or conditioned space.
A solar water-heating system with electric backup meeting the installation criteria specified in Reference Residential Appendix RA4 and with a minimum annual solar savings fraction of 0.7.
Exception 1 to Section 150.1(c)8: For climate zones 3, 4, 13 and 14, a gas or propane instantaneous water heater with an input of 200,000 Btu per hour or less and no storage tank may be installed.
NOTE: The space conditioning system shall be a heat pump as specified in Section 150.1(c)6.
Exception 2 to Section 150.1(c)8: An instantaneous electric water heater with point of use distribution as specified in RA4.4.5 may be installed for new dwelling units with a conditioned floor area of 500 square feet or less.
Exception 3 to Section 150.1(c)8A and B: A 120V HPWH may be installed in place of a 240V HPWH for new dwelling unit with one bedroom or less.

SECTION 150.1 – PERFORMANCE AND PRESCRIPTIVE COMPLIANCE APPROACHES FOR SINGLE-FAMILY RESIDENTIAL

Space conditioning distribution systems. All space conditioning systems shall meet all applicable requirements of A or B below:
High performance attics. Air handlers or ducts are allowed to be in ventilated attic spaces when the roof and ceiling insulation level meet Option B in Table 150.1-A. Duct insulation levels shall meet the requirements in Table 150.1-A.
Duct and air handlers located in conditioned space. Duct systems and air handlers of HVAC systems shall be located in conditioned space, and confirmed by field verification and diagnostic testing to meet the criterion of Reference Residential Appendix Section RA3.1.4.3.8. Duct insulation levels shall meet the requirements in Table 150.1-A.
Note: Gas heating appliances installed in conditioned spaces must meet the combustion air requirements of the California Mechanical Code Chapter 7, as applicable.
Central fan integrated ventilation systems. Central forced air system fans used to provide outside air, shall have an air-handling unit fan efficacy less than or equal to the maximum W/cfm specified in A, B, or C. The airflow rate and fan efficacy requirements in this section shall be confirmed through field verification and diagnostic testing in accordance with all applicable procedures specified in Reference Residential Appendix RA3.3. Central Fan integrated ventilation systems shall be certified to the Energy Commission as intermittent ventilation systems as specified in Reference Residential Appendix RA3.7.4.2.
0.45 W/cfm for gas furnace air-handling units.
0.58 W/cfm for air-handling units that are not gas furnaces.
0.62 W/cfm for small duct high velocity air-handling units.
Exception to Section 150.1(c)10A: Gas furnace air-handling units manufactured prior to July 3, 2019 shall comply with a fan efficacy value less than or equal to 0.58 w/cfm as confirmed by field verification and diagnostic testing in accordance with the procedures given in Reference Residential Appendix RA3.3.
Roofing products. All roofing products shall meet the requirements of Section 110.8 and the applicable requirements of Subsection A or B:
Single-family residential buildings with steep-sloped roofs in climate zones 10 through 15 shall have a minimum aged solar reflectance of 0.20 and a minimum thermal emittance of 0.75, or a minimum SRI of 16.
Single-family residential buildings with low-sloped roofs; in climate zones 13 and 15 shall have a minimum aged solar reflectance of 0.63 and a minimum thermal emittance of 0.75 or a minimum SRI of 75.
Exception 1 to Section 150.1(c)11: Building integrated photovoltaic panels and building integrated solar thermal panels are exempt from the minimum requirements for aged solar reflectance and thermal emittance or SRI.
Exception 2 to Section 150.1(c)11: Roof constructions with a weight of at least 25 lb/ft² are exempt from the minimum requirements for aged solar reflectance and thermal emittance or SRI.
Ventilation cooling. Single- family homes shall comply with the Whole-house fan (WHF) requirements shown in Table 150.1-A. When a WHF is required, comply with Subsections A, B and C below.
Have installed one or more WHFs whose total airflow cfm is equal to or greater than 1.5 cfm/ft2 of conditioned floor area. Airflow cfm for WHF's shall be determined based on the airflow listed in the Home Ventilating Institute Certified Products Directory.
Have at least 1 square foot of attic vent free area for each 750 cfm of rated whole-house fan airflow cfm, or if the manufacturer has specified a greater free vent area, the manufacturers’ free vent area specifications.
Exception to Section 150.1(c)12B: WHFs that are directly vented to the outside.
Provide homeowners who have WHFs with a one page “How to operate your whole-house fan” informational sheet.

Exception to section 150.1(c)12: New dwelling units with a conditioned floor area of 500 square feet or less shall not be required to comply with the WHF requirements.
HVAC system bypass ducts. Bypass ducts that deliver conditioned supply air directly to the space conditioning system return duct airflow shall not be used.
Photovoltaic requirements. All single-family residential buildings shall have a newly installed photovoltaic (PV) system or newly installed PV modules meeting the minimum qualification requirements specified in Joint Appendix JA11. The annual electrical output of the PV system shall be no less than the smaller of a PV system size determined using Equation 150.1-C, or the maximum PV system size that can be installed on the building’s Solar Access Roof Area (SARA).
SARA includes the area of the building’s roof space capable of structurally supporting a PV system, and the area of all roof space on covered parking areas, carports, and all other newly constructed structures on the site that are compatible with supporting a PV system per Title 24, Part 2, Section 1511.2.
SARA does NOT include:
Any roof area that has less than 70 percent annual solar access. Annual solar access is determined by dividing the total annual solar insolation, accounting for shading obstructions, by the total annual solar insolation if the same areas were unshaded by obstructions. For steep slope roofs only shading from existing permanent natural or manmade obstructions that are external to the dwelling, including but not limited to trees, hills, and adjacent structures, shall be considered for annual solar access calculations. For low slope roofs, all obstructions including those that are external to the dwelling unit, and obstructions that are part of the building design and elevation features shall be considered for the annual solar access calculations.
Occupied roof areas as specified by CBC Section 503.1.4.
Roof area that is otherwise not available due to compliance with other building code requirements if confirmed by the Executive Director.
EQUATION 150.1-C ANNUAL PHOTOVOLTAIC ELECTRICAL OUTPUT
kWPV = (CFA × A)/1000 +(NDU × B)
WHERE:
kWPV = kWdc size of the PV system CFA	= Conditioned floor area NDU	= Number of dwelling units
A	=  CFA adjustment factor from Table 150.1-C
B	=  Dwelling unit adjustment factor from Table 150.1-C
Exception 1 to Section 150.1(c)14: For steep slope roofs, SARA shall not consider roof areas with a northerly azimuth that lies between 300 degrees and 90 degrees from true north. No PV system is required if the SARA is less than 80 contiguous square feet.
Exception 2 to Section 150.1(c)14: No PV system is required when the minimum PV system size specified by section 150.1(c)14 is less than 1.8 kWdc.
Exception 3 to Section 150.1(c)14: Buildings with enforcement-authority-approved roof designs, where the enforcement authority determines it is not possible for the PV system, including panels, modules and components

SECTION 150.1 – PERFORMANCE AND PRESCRIPTIVE COMPLIANCE APPROACHES FOR SINGLE-FAMILY RESIDENTIAL

and supports and attachments to the roof structure, to meet the requirements of the American Society of Civil Engineers (ASCE), Standard 7-16, Chapter 7, Snow Loads.
Exception 4 to Section 150.1(c)14: For buildings that are approved by the local planning department prior to January 1, 2020 with mandatory conditions for approval:
Shading from roof designs and configurations for steep-sloped roofs, which are required by the mandatory conditions for approval, shall be considered for the annual solar access calculations; and
Roof areas that are not allowed by the mandatory conditions for approval to have PVs, shall not be considered in determining the SARA.
EXCEPTION 5 to Section 150.1(c)14: PV system sizes determined using Equation 150.1-C may be reduced by 25 percent if installed in conjunction with a battery storage system. The battery storage system shall meet the qualification requirements specified in Joint Appendix JA12 and have a minimum usable capacity of 7.5 kWh

TABLE 150.1-A COMPONENT PACKAGE – Single- Family Standard Building Design
Single- Family	Climate Zone	
	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	
Building Envelope Insulation	
Building Envelope	Roofs/Ceilings	Option B (meets § 150.1(c)9A)	Below Roof Deck	NR	NR	NR	R 19	NR	NR	NR	R 19	R 19	R 19	R 19	R 19	R 19	R 19	R 19	R 19	
			Insulation1,2																	
			(With Air Space)																	
			Ceiling Insulation	R 38	R 38	R 30	R 38	R 30	R 30	R 30	R 38	R 38	R 38	R 38	R 38	R 38	R 38	R 38	R 38	
			Radiant Barrier	NR	REQ	REQ	NR	REQ	REQ	REQ	NR	NR	NR	NR	NR	NR	NR	NR	NR	
		Option C (meets § 150.1(c)9B)	Ceiling Insulation	R 38	R 30	R 30	R 30	R 30	R 30	R 30	R 30	R 30	R 30	R 38	R 38	R 38	R 38	R 38	R 38	
			Radiant Barrier	NR	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	NR	
	Walls	Above Grade	Framed3	U	U	U	U	U	U	U	U	U	U	U	U	U 0.048	U 0.048	U 0.048	U 0.048	
				0.048	0.048	0.048	0.048	0.048	0.065	0.065	0.048	0.048	0.048	0.048	0.048					
			Mass Wall Interior4,5	U
0.077	U
0.077	U
0.077	U
0.077	U
0.077	U
0.077	U
0.077	U
0.077	U
0.077	U
0.077	U
0.077	U
0.077	U 0.077
R 13	U 0.077
R 13	U 0.077
R 13	U 0.059
R 17	
				R 13	R 13	R 13	R 13	R 13	R 13	R 13	R 13	R 13	R 13	R 13	R 13					
			Mass Wall Exterior4,5	U
0.125	U
0.125	U
0.125	U
0.125	U
0.125	U
0.125	U
0.125	U
0.125	U
0.125	U
0.125	U
0.125	U
0.125	U 0.125
R 8.0	U 0.125
R 8.0	U 0.125
R 8.0	U 0.077
R 13	
				R 8.0	R 8.0	R 8.0	R 8.0	R 8.0	R 8.0	R 8.0	R 8.0	R 8.0	R 8.0	R 8.0	R 8.0					
		Below Grade	Below Grade Interior6	U
0.077	U
0.077	U
0.077	U
0.077	U
0.077	U
0.077	U
0.077	U
0.077	U
0.077	U
0.077	U
0.077	U
0.077	U 0.077
R 13	U 0.077
R 13	U 0.077
R 13	U 0.067
R 15	
				R 13	R 13	R 13	R 13	R 13	R 13	R 13	R 13	R 13	R 13	R 13	R 13					
			Below Grade Exterior6	U
0.200	U
0.200	U
0.200	U
0.200	U
0.200	U
0.200	U
0.200	U
0.200	U
0.200	U
0.200	U
0.200	U
0.200	U 0.200
R 5.0	U 0.100
R 10	U 0.100
R 10	U 0.053
R 19	
				R 5.0	R 5.0	R 5.0	R 5.0	R 5.0	R 5.0	R 5.0	R 5.0	R 5.0	R 5.0	R 5.0	R 5.0					

	Climate Zone	
	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	
Building Envelope	Floors	Slab Perimeter	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	U-0.58
R-7.0	
		Raised	U- 0.037
R-19	U- 0.037
R-19	U- 0.037
R-19	U- 0.037
R-19	U- 0.037
R-19	U- 0.037
R-19	U- 0.037
R-19	U-0.037
R-19	U- 0.037
R-19	U- 0.037
R-19	U- 0.037
R-19	U- 0.037
R-19	U-0.037
R-19	U-0.037
R-19	U-0.037
R-19	U- 0.037
R-19	
		Concrete Raised	U 0.092
R-8.0	U 0.092
R-8.0	U 0.269
R-0	U 0.269
R-0	U 0.269
R-0	U 0.269
R-0	U 0.269
R-0	U 0.269
R-0	U 0.269
R-0	U 0.269
R-0	U 0.092
R-8.0	U 0.138
R-4.0	U 0.092
R-8.0	U 0.092
R-8.0	U 0.138
R-4.0	U 0.092
R-8.0	
	Quality Insulation
Installation (QII)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	
	Roofing Product	Low-Sloped	Aged Solar
Reflectance	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	0.63	NR	0.63	NR	
			
Thermal Emittance	
NR	
NR	
NR	
NR	
NR	
NR	
NR	
NR	
NR	
NR	
NR	
NR	
0.75	
NR	
0.75	
NR	
		Steep-Sloped	Aged Solar
Reflectance	NR	NR	NR	NR	NR	NR	NR	NR	NR	0.20	0.20	0.20	0.20	0.20	0.20	NR	
			
Thermal Emittance	

NR	

NR	

NR	

NR	

NR	

NR	

NR	

NR	

NR	

0.75	

0.75	

0.75	

0.75	

0.75	

0.75	

NR	
	Fenestration	Maximum
U-factor	0.30	0.30	0.30	0.30	0.30	0.30	0.30	0.30	0.30	0.30	0.30	0.30	0.30	0.30	0.30	0.30	
		Maximum SHGC	NR	0.23	NR	0.23	NR	0.23	0.23	0.23	0.23	0.23	0.23	0.23	0.23	0.23	0.23	NR	
		Maximum Total
Area	20%	20%	20%	20%	20%	20%	20%	20%	20%	20%	20%	20%	20%	20%	20%	20%	
		Maximum West Facing Area	
NR	
5%	
NR	
5%	
NR	
5%	
5%	
5%	
5%	
5%	
5%	
5%	
5%	
5%	
5%	
NR	
	Door	Maximum U-factor	
0.20	
0.20	
0.20	
0.20	
0.20	
0.20	
0.20	
0.20	
0.20	
0.20	
0.20	
0.20	
0.20	
0.20	
0.20	
0.20	

SECTION 150.1 – PERFORMANCE AND PRESCRIPTIVE COMPLIANCE APPROACHES FOR SINGLE-FAMILY RESIDENTIAL BUILDINGS

	Climate Zone	
	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	
HVAC System	Space Heating 9	Electric-Resistance
Allowed	No	No	No	No	No	No	No	No	No	No	No	No	No	No	No	No	
		If gas, AFUE	MIN	MIN	NA	NA	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	NA	NA	MIN	MIN	
		If Heat Pump, HSPF 7
/HSPF2	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	
	Space Cooling	SEER/SEER2	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	
		Refrigerant Charge Verification or Fault Indicator Display	NR	REQ	NR	NR	NR	NR	NR	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	NR	
		Whole-house fan8	NR	NR	NR	NR	NR	NR	NR	REQ	REQ	REQ	REQ	REQ	REQ	REQ	NR	NR	
	Central System Air Handlers	Central Fan Integrated Ventilation System Fan Efficacy	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	
	Ducts10	Roof/Ceiling Options B	Duct Insulation	R-8	R-8	R- 6	R-8	R- 6	R- 6	R- 6	R-8	R-8	R-8	R-8	R-8	R-8	R-8	R-8	R-8	
			§150.1(c)9A	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	
		Roof/Ceiling Option C	Duct Insulation	R-6	R-6	R-6	R-6	R-6	R-6	R-6	R-6	R-6	R-6	R- 6	R-6	R-6	R- 6	R- 6	R- 6	
			§150.1(c)9B	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	
Water Heating	All Buildings	System Shall meet Section 150.1(c)8	

SECTION 150.1 – PERFORMANCE AND PRESCRIPTIVE COMPLIANCE APPROACHES FOR SINGLE-FAMILY RESIDENTIAL BUILDINGS

Footnote requirements to TABLE 150.1-A:
Install the specified R-value with an air space present between the roofing and the roof deck, such as standard installation of concrete or clay tile.
R-values shown for below roof deck insulation are for wood-frame construction with insulation installed between the framing members. Alternatives including insulation above rafters or above roof deck shall comply with the performance standards.
Assembly U-factors for exterior framed walls can be met with cavity insulation alone or with continuous insulation alone, or with both cavity and continuous insulation that results in an assembly U-factor equal to or less than the U-factor shown. Use Reference Joint Appendices JA4 Table 4.3.1, 4.3.1(a), or Table 4.3.4 to determine alternative insulation products to be less than or equal to the required maximum U-factor.
Mass wall has a heat capacity greater than or equal to 7.0 Btu/h-ft2.
“Interior” denotes insulation installed on the inside surface of the wall. “Exterior” denotes insulation installed on the exterior surface of the wall.
Below grade “interior” denotes insulation installed on the inside surface of the wall, and below grade “exterior” denotes insulation installed on the outside surface of the wall.
HSPF means heating seasonal performance factor.
When whole-house fans are required (REQ), only those whole-house fans that are listed in the Home Ventilating Institute Certified Products Directory may be installed. Compliance requires installation of one or more WHFs whose total airflow cfm is capable of meeting or exceeding a minimum 1.5 cfm/square foot of conditioned floor area as specified by Section 150.1(c)12.
A supplemental heating unit may be installed in a space served directly or indirectly by a primary heating system, provided that the unit thermal capacity does not exceed 2 kilowatts or 7,000 Btu/hr and is controlled by a time-limiting device not exceeding 30 minutes.
For duct and air handler location: REQ denotes location in conditioned space. When the table indicates ducts and air handlers are in conditioned space, a HERS verification is required as specified by Reference Residential Appendix RA3.1.4.3.8.

TABLE 150.1-B RESERVED

SECTION 150.1 – PERFORMANCE AND PRESCRIPTIVE COMPLIANCE APPROACHES FOR SINGLE-FAMILY RESIDENTIAL BUILDINGS

Table 150.1-C – CFA and Dwelling Unit Adjustment Factors
Climate Zone	A - CFA	B - Dwelling Units	
1	0.793	1.27	
2	0.621	1.22	
3	0.628	1.12	
4	0.586	1.21	
5	0.585	1.06	
6	0.594	1.23	
7	0.572	1.15	
8	0.586	1.37	
9	0.613	1.36	
10	0.627	1.41	
11	0.836	1.44	
12	0.613	1.40	
13	0.894	1.51	
14	0.741	1.26	
15	1.56	1.47	
16	0.59	1.22	

Note: Authority: Sections 25213, 25218, 25218.5, 25402, 25402.1, and 25605, Public Resources Code. Reference:
Sections 25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, 25605, and 25943, Public
Resources Code.

SECTION 150.1 – PERFORMANCE AND PRESCRIPTIVE COMPLIANCE APPROACHES FOR SINGLE-FAMILY RESIDENTIAL BUILDINGS

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SECTION 150.1 – PERFORMANCE AND PRESCRIPTIVE COMPLIANCE APPROACHES FOR SINGLE-FAMILY RESIDENTIAL BUILDINGS

SUBCHAPTER 9
SINGLE-FAMILY RESIDENTIAL BUILDINGS - ADDITIONS AND ALTERATIONS TO EXISTING RESIDENTIAL BUILDINGS

SECTION 150.2 – ENERGY EFFICIENCY STANDARDS FOR ADDITIONS AND ALTERATIONS TO EXISTING SINGLE-FAMILY RESIDENTIAL BUILDINGS
(a) Additions. Additions to existing single-family residential buildings shall meet the requirements of Sections
110.0 through 110.9, Sections 150.0(a) through (n), (p), (q), and either Section 150.2(a)1 or 2.
Exception 1 to Section 150.2(a): Additions of 300 square feet or less are exempt from the roofing requirements of Section 150.1(c)11.
Exception 2 to Section 150.2(a): Existing inaccessible piping shall not require insulation as defined under Section 150.0(j)1.
Exception 3 to Section 150.2(a): Space-conditioning system. When heating or cooling will be extended to an addition from the existing system(s), the existing heating and cooling equipment need not comply with Part 6. The heating system capacity must be adequate to meet the minimum requirements of CBC Section 1204.1.
Exception 4 to Section 150.2(a): space-conditioning system ducts. When any length of duct is extended from an existing duct system to serve the addition, the existing duct system and the extended duct shall meet the applicable requirements specified in Section 150.2(b)1Di and 150.2(b)1Dii.
Exception 5 to Section 150.2(a): Additions 1,000 square feet or less are exempt from the ventilation cooling requirements of Section 150.1(c)12.
Exception 6 to Section 150.2(a): Photovoltaic systems, as specified in Section 150.1(c)14, are not required for additions.
Exception 7 to Section 150.2(a): Space heating system. New or replacement space heating system serving an addition may be a heat pump or gas heating system.
Prescriptive approach. Additions to existing buildings shall meet the following additional requirements:
Additions that are greater than 700 square feet shall meet the requirements of Section 150.1(c), with the following modifications:
Extensions of existing wood-framed walls may retain the dimensions of the existing walls and shall install cavity insulation of R-15 in a 2x4 framing and R-21 in a 2x6 framing.
The maximum allowed fenestration area shall be the greater of 175 square feet or 20 percent of the addition floor area, and the maximum allowed west-facing fenestration area shall be the greater of 70 square feet or the requirements of Section 150.1(c).
When existing siding of a wood-framed wall is not being removed or replaced, cavity insulation of R-15 in a 2x4 framing and R-21 in a 2x6 framing shall be installed and continuous insulation is not required.
Additions that consist of the conversion of existing spaces from unconditioned to conditioned space shall not be required to perform the following as part of QII:
Existing window and door headers shall not be required to be insulated.

SECTION 150.2 – ENERGY EFFICIENCY STANDARDS FOR ADDITIONS AND ALTERATIONS TO EXISTING SINGLE-FAMILY RESIDENTIAL BUILDINGS

Air sealing shall not be required when the existing air barrier is not being removed or replaced.
Additions that are 700 square feet or less shall meet the requirements of Section 150.1(c), with the following modifications:
Roof and ceiling insulation in a ventilated attic shall meet one of the following requirements:
In Climate Zones 1, 2, 4, and 8 through 16, achieve an overall assembly U-factor not exceeding 0.025. In wood framed assemblies, compliance with U-factors may be demonstrated by installing insulation with an R-value of R-38 or greater.
In Climate Zones 3, and 5 through 7, achieve an overall assembly U-factor not exceeding
0.031. In wood framed assemblies, compliance with U-factors may be demonstrated by installing insulation with an R-value of R-30 or greater.
Radiant barriers shall be installed in climate zones 2-15.
Extensions of existing wood-framed walls may retain the dimensions of the existing walls and shall install cavity insulation of R-15 in a 2×4 framing and R-21 in a 2×6 framing.
In Climate Zones 2, 4 and 6-15; the maximum allowed west-facing fenestration area shall not be greater than 60 square feet; and shall also comply with either a or b below:
For additions that are 700 square feet or less but greater than 400 square feet, the maximum allowed fenestration area limit is the greater of 120 square feet or 25 percent of the conditioned floor area of the addition; or
For additions that are 400 square feet or less, the maximum allowed fenestration area is the greater of 75 square feet or 30 percent of the conditioned floor area of the addition.
Quality Insulation Installation (QII) requirements of Section 150.1(c)1E do not apply.
When existing siding of a wood-framed wall is not being removed or replaced, cavity insulation of R-15 in a 2×4 framing and R-21 in a 2×6 framing shall be installed and continuous insulation is not required.
Exception to Section 150.2(a)1B: Insulation in an enclosed rafter ceiling shall meet the requirements of Section 150.0.
Mechanical ventilation for indoor air quality. Additions to existing buildings shall comply with Section 150.0(o) subject to the requirements specified in subsections i and ii below.
Whole-dwelling unit mechanical ventilation.
Dwelling units that meet the conditions in subsections 1, or 2 below shall not be required to comply with the whole-dwelling unit ventilation airflow specified in Sections 150.0(o)1C, 150.0(o)1E, or 150.0(o)1F.
Additions to an existing dwelling unit that increase the conditioned floor area of the existing dwelling unit by less than or equal to 1000 square feet.
Junior Accessory Dwelling Units (JADU) that are additions to an existing building.
Additions to an existing dwelling unit that increase the conditioned floor area of the existing dwelling unit by more than 1,000 square feet shall have mechanical ventilation airflow in accordance with Section 150.0(o)1C, 150.0(o)1E, or 150.0(o)1F as applicable. The mechanical ventilation airflow rate shall be based on the conditioned floor area of the entire dwelling unit comprised of the existing dwelling unit conditioned floor area plus the addition conditioned floor area.

SECTION 150.2 – ENERGY EFFICIENCY STANDARDS FOR ADDITIONS AND ALTERATIONS TO EXISTING SINGLE-FAMILY RESIDENTIAL BUILDINGS

New dwelling units that are additions to an existing building shall have mechanical ventilation airflow provided in accordance with Section 150.0(o)1C, 150.0(o)1E, or 150.0(o)1F as applicable. The mechanical ventilation airflow rate shall be based on the conditioned floor area of the new dwelling unit.
Local mechanical exhaust. Additions to existing buildings shall comply with all applicable requirements specified in 150.0(o)1G and 150.0(o)2.
Water heater. When a second water heater is installed as part of the addition, one of the following types of water heaters shall be installed:
A single heat pump water heater. The storage tank shall not be located outdoors and shall be placed on an incompressible, rigid insulated surface with a minimum thermal resistance of R-10. The water heater shall be installed with a communication interface that meets either the requirements of 110.12(a) or has a ANSI/CTA-2045-B communication port; or
A single heat pump water heater that meets the requirements of NEEA Advanced Water Heater Specification Tier 3 or higher; or
A gas or propane instantaneous water heater with an input of 200,000 Btu per hour or less and no storage tank; or
For additions that are 500 square feet or less, an instantaneous electric water heater with point of use distribution as specified in RA4.4.5; or
A water-heating system determined by the Executive Director to use no more energy than the one specified in Item i, ii, iii, or iv.
Performance approach. Performance calculations shall meet the requirements of Section 150.1(a) through (c), pursuant to the applicable requirements in Items A, B, and C below.
For additions alone. The addition complies if the addition alone meets the energy budgets as specified in Section 150.1(b).
Existing plus alteration plus addition. The standard design for existing plus alteration plus addition energy use is the combination of the existing building’s unaltered components to remain; existing building altered components that are the more efficient, in TDV energy, of either the existing conditions or the requirements of Section 150.2(b)2; plus the proposed addition's energy use meeting the requirements of Section 150.2(a)1. The proposed design energy use is the combination of the existing building’s unaltered components to remain and the altered components’ energy features, plus the proposed energy features of the addition.
EXCEPTION to Section 150.2(a)2B: Existing structures with a minimum R-11 insulation in framed walls showing compliance with Section 150.2(a)2 are exempt from showing compliance with Section 150.0(c).
Mechanical Ventilation for Indoor Air Quality. Additions to existing buildings shall comply with Section 150.0(o) subject to the requirements specified in subsections i, ii below.
Whole-dwelling unit mechanical ventilation.
Dwelling units that meet the conditions in Subsections 1, or 2 below shall not be required to comply with the whole-dwelling unit ventilation airflow specified in Section 150.0(o)1C, 150.0(o)1E, or 150.0(o)1F.
Additions to an existing dwelling unit that increase the conditioned floor area of the existing dwelling unit by less than or equal to 1000 square feet.
Junior Accessory Dwelling Units (JADU) that are additions to an existing building.
Additions to an existing dwelling unit that increase the conditioned floor area of the existing dwelling unit by more than 1,000 square feet shall have mechanical ventilation airflow in

SECTION 150.2 – ENERGY EFFICIENCY STANDARDS FOR ADDITIONS AND ALTERATIONS TO EXISTING SINGLE-FAMILY RESIDENTIAL BUILDINGS

accordance with Section 150.0(o)1C, 150.0(o)1E, or 150.0(o)1F as applicable. The mechanical ventilation airflow rate shall be based on the conditioned floor area of the entire dwelling unit comprised of the existing dwelling unit conditioned floor area plus the addition conditioned floor area.
New dwelling units that are additions to an existing building shall have mechanical ventilation airflow provided in accordance with Section 150.0(o)1C, 150.0(o)1E, or 150.0(o)1F as applicable. The mechanical ventilation airflow rate shall be based on the conditioned floor area of the new dwelling unit.
Local mechanical exhaust . Additions to existing buildings shall comply with all applicable requirements specified in 150.0(o)1G and 150.0(o)2.
Alterations. Alterations to existing single-family residential buildings or alterations in conjunction with a change in building occupancy to a single-family residential occupancy shall meet either Item 1 or 2 below.
Prescriptive approach. The altered component and any newly installed equipment serving the alteration shall meet the applicable requirements of Sections 110.0 through 110.9 and all applicable requirements of Sections 150.0(a) through (l), 150.0(m)1 through 150.0 (m)10, and 150.0(p) through (q); and
Added fenestration. Alterations that add vertical fenestration and skylight area shall meet the total fenestration area and west facing fenestration area, U-factor, and Solar Heat Gain Coefficient requirements of Section 150.1(c) and TABLE 150.1-A.
Exception 1 to Section 150.2(b)1A: Alterations that add fenestration area of up to 75 square feet shall not be required to meet the total fenestration area and west-facing fenestration area requirements of Sections 150.1(c)3B and C.
Exception 2 to Section 150.2(b)1A: Alterations that add up to 16 square feet of new skylight area with a maximum U-factor of 0.55 and a maximum SHGC of 0.30 area shall not be required to meet the total fenestration area and west-facing fenestration area requirements of Sections 150.1(c)3B and C.
Replacement fenestration. New manufactured fenestration products installed to replace existing fenestration products of the same total area shall meet the U-factor and Solar Heat Gain Coefficient requirements of Sections 150.1(c)3A, and 150.1(c)4.
Exception 1 to Section 150.2(b)1B: Replacement of vertical fenestration no greater than 75 square feet with a U-factor no greater than 0.40 in Climate Zones 1-16, and a SHGC value no greater than
0.35 in Climate Zones 2, 4, and 6-15.
Exception 2 to Section 150.2(b)1B: Replaced skylights must meet a U-factor no greater than 0.55, and a SHGC value no greater than 0.30.
NOTE: Glass replaced in an existing sash and frame or sashes replaced in an existing frame are considered repairs, provided that the replacement is at least equivalent to the original in performance.
Entirely new or complete replacement space-conditioning systems installed as part of an alteration, shall include all the system heating or cooling equipment, including but not limited to: condensing unit cooling or heating coil, and air handler for split systems; or complete replacement of a packaged unit; plus entirely new or replacement duct system (Section 150.2(b)1Diia). Entirely new or complete replacement space-conditioning systems shall meet the requirements of Sections 150.0(h), 150.0(i), 150.0(j)1, 150.0(j)2, 150.0(m)1 through 150.0(m)10; 150.0(m)12; 150.0(m)13, 150.1(c)7, 150.2(b)1G, and TABLE 150.2-A.
Altered duct systems - duct sealing: In all Climate Zones, when more than 25 feet of new or replacement space-conditioning system ducts are installed, the ducts shall comply with the applicable requirements of subsections i and ii below. Additionally, when altered ducts, air-handling units, cooling or heating coils, or plenums are located in garage spaces, the system shall comply with subsection 150.2(b)1Diic regardless of the length of any new or replacement space-conditioning ducts installed in the garage space.

SECTION 150.2 – ENERGY EFFICIENCY STANDARDS FOR ADDITIONS AND ALTERATIONS TO EXISTING SINGLE-FAMILY RESIDENTIAL BUILDINGS

New ducts located in unconditioned space shall meet the applicable requirements of Sections 150.0(m)1 through 150.0(m)10, and the duct insulation requirements of Table 150.2-A; and
TABLE 150.2-A DUCT INSULATION R-VALUE
Climate Zone	3, 5 through 7	1, 2, 4, 8 through 16	
Duct R-Value	R-6	R-8	
The altered duct system, regardless of location, shall be sealed as confirmed through field verification and diagnostic testing in accordance with all applicable procedures for duct sealing of altered existing duct systems as specified in Reference Residential Appendix Section RA3.1, utilizing the leakage compliance criteria specified in Subsection a or b below.
Entirely new or complete replacement duct system. If the new ducts form an entirely new or complete replacement duct system directly connected to the air handler, the duct system measured leakage shall be equal to or less than 5 percent of the system air handler airflow as confirmed by field verification and diagnostic testing utilizing the procedures in Reference Residential Appendix Section RA3.1.4.3.1.
Entirely new or complete replacement duct systems installed as part of an alteration is constructed of at least 75 percent new duct material, and up to 25 percent may consist of reused parts from the dwelling unit's existing duct system, including but not limited to registers, grilles, boots, air handler, coil, plenums, duct material; if the reused parts are accessible and can be sealed to prevent leakage.
Entirely new or complete replacement duct systems shall also conform to the requirements of Sections 150.0(m)12 and 150.0(m)13. If the air handler and ducts are located within a vented attic, the requirements of Section 150.2(b)1J shall also be met.
Extension of an existing duct system. If the new ducts are an extension of an existing duct system serving single-family dwellings, the combined new and existing duct system shall meet one of the following requirements:
The measured duct leakage shall be equal to or less than 10 percent of system air handler airflow as confirmed by field verification and diagnostic testing utilizing the procedures in Reference Residential Appendix Section RA3.1.4.3.1; or
The measured duct leakage to outside shall be equal to or less than 7 percent of system air handler airflow as confirmed by field verification and diagnostic testing utilizing the procedures in Reference Residential Appendix Section RA3.1.4.3.4; or
If it is not possible to meet the duct sealing requirements of either Section 150.2(b)1DiibI, or 150.2(b)1DiibII, then all accessible leaks shall be sealed and verified through a visual inspection and a smoke test by a certified HERS Rater utilizing the methods specified in Reference Residential Appendix RA3.1.4.3.5.
Exception to Section 150.2(b)1Diib: Duct sealing. Existing duct systems that are extended, which are constructed, insulated or sealed with asbestos.
Altered ducts and duct system components in garage spaces. When new or replacement space-conditioning ducts, air-handling units, cooling or heating coils, or plenums are located in a garage space, compliance with either I or II below is required.
The measured system duct leakage shall be less than or equal to 6 percent of system air handler airflow as determined utilizing the procedures in Reference Residential Appendix Section RA3.1.4.3.1; or
All accessible leaks located in the garage space shall be sealed and verified through a visual inspection and a smoke test by a certified HERS Rater utilizing the methods specified in Reference Residential Appendix RA3.1.4.3.5.

SECTION 150.2 – ENERGY EFFICIENCY STANDARDS FOR ADDITIONS AND ALTERATIONS TO EXISTING SINGLE-FAMILY RESIDENTIAL BUILDINGS

Altered space-conditioning system - duct sealing. In all climate zones, when a space-conditioning system serving a single-family dwelling is altered by the installation or replacement of space- conditioning system equipment, including replacement of the air handler, outdoor condensing unit of a split system air conditioner or heat pump, or cooling or heating coil; the duct system that is connected to the altered space-conditioning system equipment shall be sealed, as confirmed through field verification and diagnostic testing in accordance with the applicable procedures for duct sealing of altered existing duct systems as specified in Reference Residential Appendix RA3.1 and the leakage compliance criteria specified in Subsection i, ii, or iii below. Additionally, when altered ducts, air- handling units, cooling or heating coils, or plenums are located in garage spaces, the system shall comply with Section 150.2(b)1Diic regardless of the length of any new or replacement space- conditioning ducts installed in the garage space.
The measured duct leakage shall be equal to or less than 10 percent of system air handler airflow as determined utilizing the procedures in Reference Residential Appendix RA3.1.4.3.1; or
The measured duct leakage to outside shall be equal to or less than 7 percent of system air handler airflow as determined utilizing the procedures in Reference Residential Appendix Section RA3.1.4.3.4; or
If it is not possible to meet the duct sealing requirements of either Section 150.2(b)1Ei or 150.2(b)1Eii, then, all accessible leaks shall be sealed and verified through a visual inspection and a smoke test by a certified HERS Rater utilizing the methods specified in Reference Residential Appendix Section RA3.1.4.3.5.
Exception 1 to Section 150.2(b)1E: Duct sealing. Duct systems that are documented to have been previously sealed as confirmed through field verification and diagnostic testing in accordance with procedures in the Reference Residential Appendix RA3.1.
Exception 2 to Section 150.2(b)1E: Duct sealing. Duct systems with less than 40 linear feet as determined by visual inspection.
Exception 3 to Section 150.2(b)1E: Duct sealing. Existing duct systems constructed, insulated or sealed with asbestos.
Altered space-conditioning system - mechanical cooling. When a space-conditioning system is an air conditioner or heat pump that is altered by the installation or replacement of refrigerant-containing system components such as the compressor, condensing coil, evaporator coil, refrigerant metering device or refrigerant piping, the altered system shall comply with the following requirements:
All thermostats associated with the system shall be replaced with setback thermostats meeting the requirements of Section 110.2(c).
In Climate Zones 2, 8, 9, 10, 11, 12, 13, 14 and 15, air-cooled air conditioners and air-source heat pumps, including but not limited to ducted split systems, ducted package systems, small duct high velocity air systems, and minisplit systems, shall comply with Subsections a and b, unless the system is of a type that cannot be verified using the specified procedures. Systems that cannot comply with the requirements of 150.2(b)1Fii shall comply with Section 150.2(b)1Fiii.
Exception to Section 150.2(b)1Fii: Entirely new or complete replacement packaged systems for which the manufacturer has verified correct system refrigerant charge prior to shipment from the factory are not required to have refrigerant charge confirmed through field verification and diagnostic testing. The installer of these packaged systems shall certify on the Certificate of Installation that the packaged system was pre-charged at the factory and has not been altered in a way that would affect the charge. Ducted systems shall comply with minimum system airflow rate requirement in Section 150.2(b)1Fiia, provided that the system is of a type that can be verified using the procedure specified in RA3.3 or an approved alternative in RA1.
Minimum system airflow rate shall comply with the applicable Subsection I or II below as confirmed through field verification and diagnostic testing in accordance with the procedures

SECTION 150.2 – ENERGY EFFICIENCY STANDARDS FOR ADDITIONS AND ALTERATIONS TO EXISTING SINGLE-FAMILY RESIDENTIAL BUILDINGS

specified in Reference Residential Appendix Section RA3.3 or an approved alternative procedure as specified in Section RA1.
Small duct high velocity systems shall demonstrate a minimum system airflow rate greater than or equal to 250 cfm per ton of nominal cooling capacity; or
All other air-cooled air conditioner or air-source heat pump systems shall demonstrate a minimum system airflow rate greater than or equal to 300 cfm per ton of nominal cooling capacity; and
Exception 1 to Section 150.2(b)1Fiia: Systems unable to comply with the minimum airflow rate requirement shall demonstrate compliance using the procedures in Section RA3.3.3.1.5; and the system's thermostat shall conform to the specifications in Section 110.12.
Exception 2 to Section 150.2(b)1Fiia: Entirely new or complete replacement space conditioning systems, as specified by Section 150.2(b)1C, without zoning dampers may comply with the minimum airflow rate by meeting the applicable requirements in Tables- 150.0-B or 150.0-C as confirmed by field verification and diagnostic testing in accordance with the procedures in Reference Residential Appendix Section RA3.1.4.4 and RA3.1.4.5. The design clean-filter pressure drop requirements of Section 150.0(m)12C for the system air filter device(s) shall conform to the requirements given in Tables150.0-B and 150.0-C.
The installer shall charge the system according to manufacturer’s specifications. Refrigerant charge shall be verified according to one of the following options, as applicable.
The installer and rater shall perform the standard charge verification procedure as specified in Reference Residential Appendix Section RA3.2.2, or an approved alternative procedure as specified in Section RA1; or
The system shall be equipped with a fault indicator display (FID) device that meets the specifications of Reference Joint Appendix JA6. The installer shall verify the refrigerant charge and FID device in accordance with the procedures in Reference Residential Appendix Section RA3.4.2. The HERS Rater shall verify FID device in accordance with the procedures in Section RA3.4.2; or
The installer shall perform the weigh-in charging procedure as specified by Reference Residential Appendix Section RA3.2.3.1 provided the system is of a type that can be verified using the RA3.2.2 standard charge verification procedure and RA3.3 airflow rate verification procedure or approved alternatives in RA1. The HERS Rater shall verify the charge using RA3.2.2 and RA3.3 or approved alternatives in RA1.
Exception 1 to Section 150.2(b)1Fiib: When the outdoor temperature is less than 55° F and the installer utilizes the weigh-in charging procedure in Reference Residential Appendix Section RA3.2.3.1to demonstrate compliance, the installer may elect to utilize the HERS Rater verification procedure in Reference Residential Appendix Section RA3.2.3.2. If the HERS Rater verification procedure in Section RA3.2.3.2 is used for compliance, the system's thermostat shall conform to the specifications in Section 110.12. Ducted systems shall comply with the minimum system airflow rate requirements in Section 150.2(b)1Fiia.
In climate Zones 2, 8, 9, 10, 11, 12, 13, 14, and 15, air-cooled air conditioners or air-source heat pumps, including but not limited to ducted split systems, ducted package systems, small duct high velocity, and minisplit systems, which are of a type that cannot comply with the requirements of 150.2(b)1Fiib shall comply with subsections a and b, as applicable.
The installer shall confirm the refrigerant charge using the weigh-in charging procedure specified in Reference Residential Appendix Section RA3.2.3.1, as verified by a HERS Rater according to the procedures specified in Reference Residential Appendix RA3.2.3.2; and

SECTION 150.2 – ENERGY EFFICIENCY STANDARDS FOR ADDITIONS AND ALTERATIONS TO EXISTING SINGLE-FAMILY RESIDENTIAL BUILDINGS

Systems that utilize forced air ducts shall comply with the minimum system airflow rate requirement in Section 150.2(b)1Fiia provided the system is of a type that can be verified using the procedures in Section RA3.3 or an approved alternative procedure in Section RA1.
Exception to Section 150.2(b)1Fiii: Entirely new or complete replacement packaged systems for which the manufacturer has verified correct system refrigerant charge prior to shipment from the factory are not required to have refrigerant charge confirmed through field verification and diagnostic testing. The installer of these packaged systems shall certify on the Certificate of Installation that the packaged system was pre-charged at the factory and has not been altered in a way that would affect the charge. Ducted systems shall comply with minimum system airflow rate requirement in Section 150.2(b)1Fiiib, provided that the system is of a type that can be verified using the procedure specified in Section RA3.3 or an approved alternative in Section RA1.
Altered Space Heating System. Altered or replacement space heating systems shall not use electric resistance as the primary heat source.
Exception 1 to Section 150.2(b)1G: Non-ducted electric resistance space heating systems, if the existing space heating system is electric resistance.
Exception 2 to Section 150.2(b)1G: Ducted electric resistance space heating systems, if the existing space heating system is electric resistance and a ducted space cooling system is not being replaced or installed.
Exception 3 to Section 150.2(b)1G: Electric resistance space heating systems, if the existing space heating system is electric resistance and the building is located in climate zones 7 or 15.
Water-Heating System. Altered or replacement service water-heating systems or components shall meet the applicable requirements below:
Pipe Insulation. For newly installed ad existing accessible piping, the insulation requirements of Section 150.0(j)1 shall be met.
Distribution System. For recirculation distribution systems serving individual dwelling units, only demand recirculation systems with manual on/off control as specified in the Reference Appendix RA4.4.9 shall be installed.
Water heating system. The water heating system shall meet one of the following:
A natural gas or propane water-heating system; or
A single heat pump water heater. The storage tank shall not be located outdoors and be placed on an incompressible, rigid insulated surface with a minimum thermal resistance of R-10. The water heater shall be installed with a communication interface that either meets the requirements of Section 110.12(a) or has an ANSI/CTA-2045-B communication port; or
A single heat pump water heater that meets the requirements of NEEA Advanced Water Heater Specification Tier 3 or higher; or
If the existing water heater is an electric resistance water heater, a consumer electric water heater; or
A water-heating system determined by the Executive Director to use no more energy than the one specified in Item a above; or if no natural gas is connected to the existing water heater location, a water-heating system determined by the executive director to use no more energy than the one specified in Item d above.

SECTION 150.2 – ENERGY EFFICIENCY STANDARDS FOR ADDITIONS AND ALTERATIONS TO EXISTING SINGLE-FAMILY RESIDENTIAL BUILDINGS

Roofs. Replacements of the exterior surface of existing roofs, including adding a new surface layer on top of the existing exterior surface, shall meet the requirements of Section 110.8 and the applicable requirements of Subsections i and ii where more than 50 percent of the roof is being replaced.
Steep-sloped roofs. Steep-sloped roofs shall meet the following:
New roofing products in Climate Zones 4 and 8 through 15 shall have a minimum aged solar reflectance of 0.20 and a minimum thermal emittance of 0.75, or a minimum SRI of 16.
Exception 1 to Section 150.2(b)1Ii: The following shall be considered equivalent to Subsection i:
Buildings with ceiling assemblies with a U-factor lower than or equal to 0.025 or that are insulated with at least R-38 ceiling insulation; or
Buildings with a radiant barrier in the attic, where the radiant barrier is not installed directly above spaced sheathing, meeting the requirements of Section 150.1(c)2; or
In Climate Zones 2, 4, 9, 10, 12 and 14, buildings that have no ducts in the attic; or
Buildings with R-2 or greater continuous insulation above or below the roof deck.
Exception 2 to Section 150.2(b)1Ii: Roof area covered by building integrated photovoltaic panels or building integrated solar thermal panels is not required to meet minimum requirements for aged solar reflectance, thermal emittance or SRI.
Exception 3 to Section 150.2(b)1Ii: Roof constructions with a weight of at least 25 lb/ft2 are exempt from minimum requirements for aged solar reflectance and thermal emittance, or SRI.
Low-sloped roofs. Low-sloped roofs shall meet the following:
New roofing products in Climate Zones 4 and 6 through 15 shall have an aged solar reflectance equal to or greater than 0.63 and a thermal emittance equal or greater than 0.75, or a minimum SRI of 75.
Exception 1 to Section 150.2(b)1Iiia: The aged solar reflectance can be met by using insulation at the roof deck specified in Table 150.2-B.
TABLE 150.2-B AGED SOLAR REFLECTANCE INSULATION TRADE OFF TABLE
Minimum Aged Solar Reflectance	Roof Deck Continuous Insulation R-value (Climate Zones 6-7)	Roof Deck Continuous Insulation R-value
(Climate Zones 2, 4, & 8-15)	
0.60	2	16	
0.55	4	18	
0.50	6	20	
0.45	8	22	
No Requirement	10	24	
Exception 2 to Section 150.2(b)1Iiia: Roof area covered by building integrated photovoltaic panels or building integrated solar thermal panels is not required to meet the minimum requirements for aged solar reflectance, thermal emittance or SRI.
Exception 3 to Section 150.2(b)1Iiia: Roof constructions with a weight of at least 25 lb/ft2 are exempt from the minimum requirements for aged solar reflectance and thermal emittance, or SRI.

SECTION 150.2 – ENERGY EFFICIENCY STANDARDS FOR ADDITIONS AND ALTERATIONS TO EXISTING SINGLE-FAMILY RESIDENTIAL BUILDINGS

Roofs shall be insulated to the levels specified in Table 150.2-C.
TABLE 150.2-C INSULATION REQUIREMENTS FOR ROOF ALTERATIONS
Climate Zone	Continuous Insulation R-value	Roof Assembly U-factor	
3, 5-7	NR	NR	
1, 2, 4, 8-16	R-14	0.039	
Exception 1 to Section 150.2(b)1Iiib: Existing roofs with R-10 or greater continuous insulation above or below the roof deck; or
Exception 2 to Section 150.2(b)1Iiib: Existing roofs with an assembly U-factor of 0.056 or less or that are insulated with at least R-19 insulation between the roof rafters and in contact with the roof deck in Climate Zones 1, 2, 4, and 8 through 10; or
Exception 3 to Section 150.2(b)1Iiib: The continuous insulation requirements of Table 150.2-C may be reduced to R-4 where the following conditions are met:
Mechanical equipment is located on the roof and will not be temporarily disconnected and lifted as part of the roof replacement and the addition of insulation required by Table 150.2-C would reduce the height from the roof surface to the top of the base flashing to less than that set forth in the manufacturer’s installation instructions as per California Residential Code Section R900; or
Replaced roofing abuts sidewall or parapet walls and the addition of insulation required by Table 150.2-C would reduce the height from the roof surface to the top of the base flashing to less than that set forth in the manufacturer’s installation instructions as per the California Residential Code Section R900, provided that the following conditions apply:
The sidewall or parapet walls are finished with an exterior cladding material other than the roof covering membrane material; and
The sidewall or parapet walls have exterior cladding material that must be removed to install the new roof covering membrane to maintain the minimum base flashing height; and
The ratio of the replaced roof area to the linear dimension of affected sidewall or parapet walls is less than 25 square feet per linear foot; or
Exception 4 to Section 150.2(b)1Iiib: The continuous insulation requirements per Table 150.2-C may be reduced where increasing the thickness of above deck insulation would reduce the flashing around an existing exterior wall opening below what is permitted by the fenestration or door manufacturer’s installation instructions, or registered design professionals approved flashing design, as per the California Residential Code Section R703.4, or by California Residential Code Section R905.2.8.3.
Exception 5 to Section 150.2(b)1Biib: Tapered insulation with thermal resistance less than prescribed at the drains and other low points may be used provided that the thickness of insulation is increased at the high points of the roof so that the average thermal resistance equals or exceeds the required value.
Ceiling. Vented attics shall meet the following:
In Climate Zones 1 through 4, 6, and 8 through 16 insulation shall be installed to achieve a weighted U-factor of 0.020 or insulation installed at the ceiling level shall result in an insulated thermal resistance of R-49 or greater for the insulation alone; and
Exception to Section 150.2(b)1Ji: In Climate Zones 1, 3, and 6, dwelling units with at least R- 19 existing insulation installed at the ceiling level.

SECTION 150.2 – ENERGY EFFICIENCY STANDARDS FOR ADDITIONS AND ALTERATIONS TO EXISTING SINGLE-FAMILY RESIDENTIAL BUILDINGS

In Climate Zones 2, 4, and 8 through 16 air seal all accessible areas of the ceiling plane between the attic and the conditioned space in accordance with Section 110.7; and
Exception 1 to Section 150.2(b)1Jii: Dwelling units with at least R-19 existing insulation installed at the ceiling level.
Exception 2 to Section 150.2(b)1Jii: Dwelling units with atmospherically vented space heating or water heating combustion appliances located inside the pressure boundary of the dwelling unit.
In Climate Zones 1 through 4 and 8 through 16 recessed downlight luminaires in the ceiling shall be covered with insulation to the same depth as the rest of the ceiling. Luminaires not rated for insulation contact must be replaced or retrofitted with a fireproof cover that allows for insulation to be installed directly over the cover; and
Exception 1 to Section 150.2(b)1Jiii: In Climate Zones 1 through 4 and 8 through 10, dwelling units with at least R-19 existing insulation installed at the ceiling level.
Attic ventilation shall comply with the California Building Code requirements.
Exception 1 to Section 150.2(b)1J: Dwelling units with at least R-38 existing insulation installed at the ceiling level.
Exception 2 to Section 150.2(b)1J: Dwelling units where the alteration would directly cause the disturbance of asbestos.
Exception 3 to Section 150.2(b)1J: Dwelling units with knob and tube wiring located in the vented attic.
Exception 4 to Section 150.2(b)1J: Where the accessible space in the attic is not large enough to accommodate the required R-value, the entire accessible space shall be filled with insulation provided such installation does not violate Section 806.3 of Title 24, Part 2.5.
Exception 5 to Section 150.2(b)1J: Where the attic space above the altered dwelling unit is shared with other dwelling units and the requirements of Section 150.2(b)1J are not triggered for the other dwelling units.
Lighting. The altered lighting system shall meet the lighting requirements of Section 150.0(k). The altered luminaires shall meet the luminaire efficacy requirements of Section 150.0(k) and TABLE 150.0-A. Where existing screw base sockets are present in ceiling-recessed luminaires, removal of these sockets is not required provided that new JA8 compliant trim kits or lamps designed for use with recessed downlights or luminaires are installed.
Mechanical ventilation for indoor air quality - entirely new or complete replacement ventilation Systems. Entirely new or complete replacement ventilation systems shall comply with all applicable requirements in Section 150.0(o). An entirely new or complete replacement ventilation system includes a new ventilation fan component and an entirely new duct system. An entirely new or complete replacement duct system is constructed of at least 75 percent new duct material, and up to 25 percent may consist of reused parts from the dwelling unit's existing duct system, including but not limited to registers, grilles, boots, air filtration devices and duct material, if the reused parts are accessible and can be sealed to prevent leakage.
Mechanical ventilation for indoor air quality - altered ventilation systems. Altered ventilation system components or newly installed ventilation equipment serving the alteration shall comply with Section 150.0(o) as applicable subject to the requirements specified in subsections i and ii below.
Whole-dwelling unit mechanical ventilation.
Whole-dwelling unit airflow. If the whole-dwelling ventilation fan is altered or replaced, then one of the following subsections 1 or 2 shall be used for compliance as applicable.

SECTION 150.2 – ENERGY EFFICIENCY STANDARDS FOR ADDITIONS AND ALTERATIONS TO EXISTING SINGLE-FAMILY RESIDENTIAL BUILDINGS

Dwellings that were required by a previous building permit to comply with the whole- dwelling unit airflow requirements in Section 150.0(o) shall meet or exceed the whole- dwelling unit mechanical ventilation airflow specified in Section 150.0(o)1C, 150.0(o)1E or 150.0(o)1F as confirmed through field verification and diagnostic testing in accordance with the applicable procedures specified in Reference Residential Appendix RA3.7.
Dwellings that were not required by a previous building permit to have a whole-dwelling unit ventilation system shall not be required to comply with the whole-dwelling unit ventilation airflow specified in Section 150.0(o)1C, 150.0(o)1E or 150.0(o)1F.
Replacement ventilation fans. Whole-dwelling unit replacement ventilation fans shall be rated for airflow and sound in accordance with the requirements of ASHRAE 62.2 Sections 7.1 and 7.2. Additionally, when conformance to a specified whole-dwelling unit airflow rate is required for compliance, the replacement fans shall be rated at no less than the airflow rate required for compliance.
Air filters. If the air filtration device for a whole-dwelling unit ventilation system is altered or replaced, then one of the following subsections 1 or 2 shall be used for compliance as applicable.
Dwellings that were required by a previous building permit to comply with the ventilation system air filtration requirements in Section 150.0(m)12 shall comply with the air filtration requirements in Section 150.0(m)12.
Dwellings that were not required by a previous building permit to comply with the ventilation system air filtration requirements in 150.0(m)12 shall not be required to comply with the air filtration requirements specified in Section 150.0(m)12.
Local mechanical exhaust.
Bathroom local mechanical exhaust. Altered bathroom local mechanical exhaust systems shall comply with the applicable requirements specified in Section 150.0(o)1G.
Kitchen local mechanical Exhaust. If the kitchen local ventilation fan is altered or replaced, then one of the following subsections 1, 2, or 3 shall be used for compliance as applicable.
Dwellings that were required by a previous building permit to comply with the kitchen local exhaust requirements in 150.0(o)1G shall meet or exceed the applicable airflow or capture efficiency requirements in Section 150.0(o)1G.
Dwellings that were required by a previous building permit to install a vented kitchen range hood or other kitchen exhaust fan, shall install a replacement fan that meets or exceeds the airflow required by the previous building permit, or 100 cfm, whichever is greater.
Dwellings that were not required to have a kitchen local ventilation exhaust system according to the conditions in either subsection 1 or 2 above shall not be required to comply with the requirements of Section 150.0(o)1G.
Replacement Ventilation Fans. New or replacement local mechanical exhaust fans shall be rated for airflow and sound in accordance with the requirements of ASHRAE 62.2 Section 7.1 and Title 24, Part 6 Section 150.0(o)1Gvi. Additionally, when compliance with a specified exhaust airflow rate is required, the replacement fan shall be rated at no less than the airflow rate required for compliance.
Exterior doors. Alterations that add exterior door area shall meet the U-factor requirement of Section 150.1(c)5.

SECTION 150.2 – ENERGY EFFICIENCY STANDARDS FOR ADDITIONS AND ALTERATIONS TO EXISTING SINGLE-FAMILY RESIDENTIAL BUILDINGS

Performance approach.
The altered component(s) and any newly installed equipment serving the alteration shall meet the applicable requirements of Subsections A, B, and C below.
The altered components shall meet the applicable requirements of Sections 110.0 through 110.9, Sections 150.0(a) through (l), Sections 150.0(m)1 through 150.0 (m)10, and Sections 150.0(p) through
(q). Entirely new or complete replacement mechanical ventilation systems as these terms are used in Section 150.2(b)1L, shall comply with the requirements in Section 150.2(b)1L. Altered mechanical ventilation systems shall comply with the requirements of Section 150.2(b)1M. Entirely new or complete replacement space-conditioning systems, and entirely new or complete replacement duct systems, as these terms are used in Sections 150.2(b)1C and 150.2(b)1Diia, shall comply with the requirements of Sections 150.0(m)12 and 150.0(m)13.
The standard design for an altered component shall be the higher efficiency of existing conditions or the requirements stated in Table 150.2-D. For components not being altered, the standard design shall be based on the existing conditions. When the third party verification option is specified as a requirement, all components proposed for alteration for which the additional credit is taken, must be verified.

SECTION 150.2 – ENERGY EFFICIENCY STANDARDS FOR ADDITIONS AND ALTERATIONS TO EXISTING SINGLE-FAMILY RESIDENTIAL BUILDINGS

TABLE 150.2-D STANDARD DESIGN FOR AN ALTERED COMPONENT
Altered Component	Standard Design Without Third Party Verification of Existing Conditions Shall be Based On	Standard Design With Third Party Verification of Existing Conditions Shall be Based On	
Ceiling Insulation, Wall Insulation, and
Raised-floor Insulation	The requirements of Sections 150.0(a), (c), and (d)	The existing insulation R-value	
Fenestration	The U-factor of 0.40 and SHGC value of 0.35. The glass area shall be the glass area of the existing building.	If the proposed U-factor is ≤ 0.40 and SHGC value is
≤ 0.35, the standard design shall be based on the existing U-factor and SHGC values as verified. Otherwise, the standard design shall be based on the U-factor of 0.40 and SHGC value of 0.35. The glass area shall be the glass area of the existing building.	
Window Film	The U-factor of 0.40 and SHGC value of 0.35.	The existing fenestration in the alteration shall be based on Table 110.6-A and Table 110.6-B.	
Doors	The U-factor of 0.20. The door area shall be the door area of the existing building.	If the proposed U-factor is < 0.20, the standard design shall be based on the existing U-factor value as verified. Otherwise, the standard design shall be based on the U-factor of 0.20. The door area shall be the door area of the existing building.	
Space-Heating and Space-Cooling Equipment	TABLE 150.1-A for equipment efficiency requirements;
Section 150.2(b)1C for entirely new or complete replacement systems;
Section 150.2(b)1F for refrigerant charge verification requirements.	The existing efficiency levels.	
Air Distribution System – Duct Sealing	The requirements of Sections 150.2(b)1D and 150.2(b)1E	The requirements of Sections 150.2(b)1D and 150.2(b)1E	
Air Distribution System – Duct Insulation	The proposed efficiency levels.	The existing efficiency levels.	
Water Heating Systems	The requirements of Section 150.2(b)1Hii	The existing efficiency level.	
Roofing Products	The requirements of Section 150.2(b)1I.	The requirements of Section 150.2(b)1I	
All Other Measures	The proposed efficiency levels.	The existing efficiency levels.	
The proposed design shall be based on the actual values of the altered components.
Notes to Section 150.2(b)2:
If an existing component must be replaced with a new component, that component is considered an altered component for the purpose of determining the standard design altered component energy budget and must meet the requirements of Section 150.2(b)2B.
The standard design shall assume the same geometry and orientation as the proposed design.
The “existing efficiency level” modeling rules, including situations where nameplate data are not available, are described in the Residential ACM Approval Manual.
Exception 1 to Section 150.2(b): Any dual-glazed greenhouse or garden window installed as part of an alteration complies with the U-factor requirements in Section 150.1(c)3.
Exception 2 to Section 150.2(b): Where the space in the attic or rafter area is not large enough to accommodate the required R-value, the entire space shall be filled with insulation provided such installation does not violate Section 1203.2 of Title 24, Part 2.
Whole building. Any addition or alteration may comply with the requirements of Title 24, Part 6 by meeting the requirements for the entire building.
Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, 25910, and 25943, Public Resources
Code.

SECTION 150.2 – ENERGY EFFICIENCY STANDARDS FOR ADDITIONS AND ALTERATIONS TO EXISTING SINGLE-FAMILY

SUBCHAPTER 10
MULTIFAMILY BUILDINGS—MANDATORY REQUIREMENTS

SECTION 160.0 – GENERAL
Multifamily buildings shall comply with the applicable requirements of Sections 160.1 through 160.9. Sections 160.1 through 160.9 apply to dwelling units and common use areas in multifamily buildings. Nonresidential occupancies in a mixed occupancy building shall comply with nonresidential requirements in Sections 120.0 through 141.1.
Note: The requirements of Sections 160.1 through 160.9 apply to newly constructed buildings. Sections 180.1 through
180.4 specify which requirements of Sections 160.1 through 160.9 apply to additions or alterations.

Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference:
Sections 25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and 25943, Public
Resources Code.

SECTION 160.1 – MANDATORY REQUIREMENTS FOR BUILDING ENVELOPES
Ceiling and roof insulation. The opaque portions of ceilings and roofs separating conditioned spaces from unconditioned spaces or ambient air shall meet the requirements of Item 1 or 2, and 3 below:
Attic roof. Roofs with an attic space shall meet the requirements of A through C below:
Shall be insulated to achieve an area-weighted average U-factor not exceeding U-0.043 or shall be insulated between wood-framing members with insulation resulting in an installed thermal resistance of R-22 or greater for the insulation alone. For vented attics, the mandatory insulation shall be installed at the ceiling level; for unvented attics, the mandatory insulation shall be placed at either ceiling or roof level;
Attic access doors shall have permanently attached insulation using adhesive or mechanical fasteners. The attic access shall be gasketed to prevent air leakage; and
When loose-fill insulation is installed, the minimum installed weight per square foot shall conform with the insulation manufacturer's installed design weight per square foot at the manufacturer's labeled R-value.
Non-attic roof. Roofs without attic spaces shall meet the applicable requirements of A through C below:
Metal building—The area-weighted average U-factor of the roof assembly shall not exceed 0.098.
Wood framed and others—The area-weighted average U-factor of the roof assembly shall not exceed 0.075.
Insulation placement—When insulation is installed at the roof, fixed vents or openings to the outdoors or to unconditioned spaces shall not be installed. When the space between the ceiling and the roof is either directly or indirectly conditioned space, it shall not be considered an attic for the purposes of complying with CBC attic ventilation requirements.
Exception to Section 160.1(a)2C: Vents that do not penetrate the roof deck and are instead designed for wind resistance for roof membranes are not within the scope of Section 160.1(a)2C.
Insulation shall be installed in direct contact with a roof or ceiling that is sealed to limit infiltration and exfiltration as specified in Section 110.7, including but not limited to placing insulation either above or below the roof deck or on top of a drywall ceiling.
Wall insulation. Opaque portions of above grade walls separating conditioned spaces from unconditioned spaces or ambient air shall meet the following applicable requirements:
Metal building—The area-weighted average U-factor of the wall assembly shall not exceed 0.113.
Metal framed—The area-weighted average U-factor of the wall assembly shall not exceed 0.151.
Wood framed and others—
Nominal 2x4 inch framing shall have an area-weighted average U-factor of the wall assembly not exceeding 0.102.
Nominal 2x6 inch framing shall have an area-weighted average U-factor of the wall assembly not exceeding 0.071.
Other wall assemblies shall have an area-weighted average U-factor of the wall assembly not exceeding 0.102.
Light mass walls—A 6 inch or greater hollow core concrete masonry unit shall have a U-factor not to exceed 0.440.
Heavy mass walls—An 8 inch or greater hollow core concrete masonry unit shall have a U-factor not to exceed 0.690.
Spandrel panels and curtain wall—The area-weighted average U-factor of the spandrel panels and curtain wall assembly shall not exceed 0.280.
Demising walls—The opaque portions of framed demising walls shall meet the requirements of Item A or B below:

Wood framed walls shall be insulated to meet a U-factor not greater than 0.099.
Metal framed walls shall be insulated to meet a U-factor not greater than 0.151.
Bay or bow window roofs and floors shall be insulated to meet the wall insulation requirements of Table 170.2-A.
Floor and soffit insulation. The opaque portions of floors and soffits that separate conditioned spaces from unconditioned spaces or ambient air shall meet the applicable requirements of Items 1 through 3 below:
Raised mass floors shall have a minimum of 3 inches of lightweight concrete over a metal deck or the area- weighted average U-factor of the floor assembly shall not exceed 0.269.
Raised wood floor shall have an overall assembly U-factor not exceeding U-0.037. In a wood framed assembly, compliance with the U-factor may be demonstrated by installing insulation with an R-value of 19 or greater.
Other floors—The area-weighted average U-factor of the floor assembly shall not exceed 0.071.
Heated slab on grade floor—A heated slab on grade floor shall be insulated to meet the requirements of Section 110.8(g).
Exception to Section 160.1(c): A building with a controlled ventilation or unvented crawl space may omit raised floor insulation if all of the following are met:
The foundation walls are insulated to meet the wall insulation minimums as shown in Table 170.2-A; and
A Class I or Class II vapor retarder is placed over the entire floor of the crawl space; and
Vents between the crawl space and outside air are fitted with automatically operated louvers that are temperature actuated; and
The requirements in Reference Residential Appendix RA4.5.1.
Vapor retarder.
In Climate Zones 1–16, the earth floor of unvented crawl space shall be covered with a Class I or Class II vapor retarder. This requirement shall also apply to controlled ventilation crawl space for buildings complying with the Exception to Section 160.1(c).
In Climate Zones 14 and 16, a Class I or Class II vapor retarder shall be installed on the conditioned space side of all insulation in all exterior walls, vented attics and unvented attics with air-permeable insulation.
Fenestration products. Fenestration separating conditioned space from unconditioned space or outdoors shall meet the requirements of either Item 1 or 2 below:
Fenestration, including skylight products, must have a maximum U-factor of 0.58.
Exception 1 to Section 160.1(e)1: Up to 0.5 percent of the conditioned floor area is exempt from the maximum U- factor requirement.
Exception 2 to Section 160.1(e)1: For dual-glazed greenhouse or garden windows, up to 30 square feet of fenestration area per dwelling unit is exempt from the maximum U-factor requirement.
The area-weighted average U-factor of all fenestration, including skylight products, shall not exceed 0.58.
Installation of fireplaces, decorative gas appliances and gas logs. If a masonry or factory-built fireplace is installed, it shall comply with Section 110.5, Section 4.503 of Part 11, and shall have the following:
Closable metal or glass doors covering the entire opening of the firebox; and
A combustion air intake to draw air from the outside of the building, which is at least 6 square inches in area and is equipped with a readily accessible, operable and tight-fitting damper or combustion-air control device; and
Exception to Section 160.1(f)2: An outside combustion-air intake is not required if the fireplace will be installed over concrete slab flooring and the fireplace will not be located on an exterior wall.
A flue damper with a readily accessible control.

Exception to Section 160.1(f)3: When a gas log, log lighter or decorative gas appliance is installed in a fireplace, the flue damper shall be blocked open if required by the CMC or the manufacturer's installation instructions.
NOTE: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference:
Sections 25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and 25943, Public
Resources Code.

SECTION 160.2 – MANDATORY REQUIREMENTS FOR VENTILATION AND INDOOR AIR QUALITY
General requirements.
Attached dwelling units in multifamily buildings shall comply with the applicable requirements of Subsection 160.2(b) below. Occupiable spaces in multifamily buildings other than attached dwelling units shall comply with the applicable requirements of Section 160.2(c). When HERS field verification and diagnostic testing of attached dwelling units is required by Section 160.2, buildings with three habitable stories or fewer shall use the applicable procedures in the Residential Appendices, and buildings with four or more habitable stories shall use the applicable procedures in Nonresidential Appendices NA1 and NA2.
NOTE: Section 160.2 is not applicable to townhouses or dwellings that contain two dwelling units.
The required outdoor air-ventilation rate and the air-distribution system design shall be clearly identified on the building design plans submitted to the enforcement agency in accordance with Section 10-103 of Title 24, Part 1.
Attached dwelling units. Attached dwelling units shall comply with the requirements of Subsections 1 and 2 below.
Air filtration.
System types specified in Subsections i, ii and iii shall be provided with air filters in accordance with Sections 160.2(b)1B, 160.2(b)1C and 160.2(b)1D. System types specified in Subsection i shall also comply with Section 160.2(b)1E.
Mechanical space-conditioning systems that supply air to an occupiable space through ductwork exceeding 10 ft (3 m) in length.
Mechanical supply-only ventilation systems and makeup air systems that provide outside air to an occupiable space.
The supply side of mechanical balanced ventilation systems, including heat recovery ventilation systems, and energy recovery ventilation systems that provide outside air to an occupiable space.
System design and installation.
The system shall be designed to ensure that all recirculated air and all outdoor air supplied to the occupiable space are filtered before passing through any system's thermal conditioning components.
Exception to Section 160.2(b)1Bi: For heat recovery ventilators and energy recovery ventilators, the location of the filters required by Section 160.2(b)1 may be downstream of a system thermal conditioning component, provided the system is equipped with ancillary filtration upstream of the system’s thermal conditioning component.
All systems shall be designed to accommodate the clean-filter pressure drop imposed by the system air filter(s). The design airflow rate, and maximum allowable clean-filter pressure drop at the design airflow rate applicable to each air filter, shall be determined and reported on labels according to Subsection iv below.
Systems specified in Section 160.2(b)1Ai shall be equipped with air filters that meet either Subsection a or b below:
Nominal two-inch minimum depth filter(s) shall be sized by the system designer, or
Nominal one-inch minimum depth filter(s) shall be allowed if the filter(s) are sized according to Equation 160.2-A, based on a maximum face velocity of 150 ft per minute and according to the maximum allowable clean-filter pressure drop specified in Section 160.2(b)1Dii.

Aface = Qfilter /Vface	(Equation 160.2-A)
where:
Aface =	air filter face area, the product of air filter nominal length × nominal width, ft2. Qfilter	=	design airflow rate for the air filter, ft3/min
Vface =	air filter face velocity ≤ 150 ft/min
All system air filters shall be located and installed in such a manner as to be accessible for regular service by the system owner.
All system air filter installation locations shall be labeled to disclose the applicable design airflow rate and the maximum allowable clean-filter pressure drop. The labels shall be permanently affixed to the air filter installation location, readily legible, and visible to a person replacing the air filter.
Filter racks or grilles shall use gaskets, sealing or other means to close gaps around inserted filters and prevent air from bypassing the filter.
Air filter efficiency. The system shall be provided with air filters having a designated efficiency equal to or greater than MERV 13 when tested in accordance with ASHRAE Standard 52.2, or a particle size efficiency rating equal to or greater than 50 percent in the 0.30–1.0 µm range, and equal to or greater than 85 percent in the 1.0–3.0 µm range when tested in accordance with AHRI Standard 680.
Air filter pressure drop. All systems shall be provided with air filters that conform to the applicable maximum allowable clean-filter pressure drop specified in Subsection i, ii, iii or iv below, when tested using ASHRAE Standard 52.2, or as rated using AHRI Standard 680, for the applicable design airflow rates for the system air filters.
The maximum allowable clean-filter pressure drop shall be determined by the system design for the nominal two-inch minimum depth air filter required by Section 160.2(b)1Biia, or
A maximum of 25 Pa (0.1 inches water) clean-filter pressure drop shall be allowed for a nominal 1-inch depth air filter sized according to Section 160.2(b)1Biib, or
For systems specified in Sections 160.2(b)1Aii and 160.2(b)1Aiii, the maximum allowable clean filter pressure drop shall be determined by the system design.
If Exception 1 to Section 160.3(b)5Lii or iv is utilized for compliance with cooling system airflow rate and fan efficacy requirements, the clean-filter pressure drop for the system air filter shall conform to the requirements given in Table 160.3-A or 160.3-B.
Air filter product labeling. Systems described in Section 160.2(b)1Ai shall be equipped with air filters that have been labeled by the manufacturer to disclose the efficiency and pressure drop ratings that demonstrate conformance with Sections 160.2(b)1C and 160.2(b)1D.
Exception to Section 160.2(b)1: Evaporative coolers are exempt from the air filtration requirements in Section 160.2(b)1.
Ventilation and indoor air quality for attached dwelling units. All attached dwelling units shall meet the requirements of ASHRAE Standard 62.2, Ventilation and Acceptable Indoor Air Quality in Residential Buildings subject to the amendments specified in Section 160.2(b)2A below. All dwelling units shall comply with Section 160.2(b)2B below.
Exception to Section 160.2(b)2 The following sections of ASHRAE 62.2 shall not be required for compliance: Section 4.1.1, Section 4.1.2, Section 4.1.4, Section 4.3, Section 4.6, Section 5, Section 6.1.1, Section 6.5.2 and Normative Appendix A.
Amendments to ASHRAE 62.2 requirements.
Window operation. Window operation is not a permissible method of providing the dwelling unit ventilation airflow specified in Subsection iv or v below.

Central fan integrated (CFI) ventilation systems.
Continuous operation prohibition. Continuous operation of a dwelling unit's central forced air system air handlers used in CFI ventilation systems is not a permissible method of providing the whole- dwelling unit ventilation airflow required by Section 160.2(b)2Aiv.
Exception to Section 160.2(b)2Aiia: The Energy Commission may approve continuous operation of central fan integrated ventilation systems pursuant to Section 10-109(h).
Outdoor air damper(s). A motorized damper(s) shall be installed on the connected ventilation duct(s) of CFI systems that prevents all airflow into or out of the space-conditioning duct system when the damper(s) is closed.
Damper control. The required motorized damper(s) shall be controlled to be in an opened position when outdoor air ventilation is required for compliance, and shall be in the closed position when ventilation air is not required. The damper(s) shall be closed whenever the space-conditioning system air handling unit is not operating. If the outdoor airflow for the CFI ventilation system is fan- powered, then the outdoor air fan shall not operate when the required motorized damper(s) on the outdoor air ventilation duct(s) is closed.
Variable ventilation. CFI ventilation systems shall incorporate controls that track outdoor air ventilation run time, and either open or close the required motorized damper(s) depending on whether or not outdoor air ventilation is required for compliance with Section 160.2(b)2Aiv. During periods when comfort conditioning is not called for by the space-conditioning thermostat, the CFI ventilation system controls shall operate the space-conditioning system central fan and outdoor air damper(s) when necessary to ensure compliance with the minimum outdoor air ventilation required by Section 160.2(b)2Aiv in accordance with applicable variable mechanical ventilation methods specified in ASHRAE 62.2 Section 4.5.
Air filtration. Air filtration shall conform to the specifications in Section 160.2(b)1. Compliance with ASHRAE 62.2 Sections 6.7 (Minimum Filtration) and 6.7.1 (Filter Pressure Drop) shall not be required.
Whole-dwelling unit mechanical ventilation. Multifamily attached dwelling units shall comply with Subsections a and b below.
Mechanical ventilation airflow shall be provided at rates greater than or equal to the value determined in accordance with Equation 160.2-B.
Total Required Ventilation Rate [ASHRAE 62.2:4.1.1].
Qtot = 0.03Afloor + 7.5(Nbr + 1)	(Equation 160.2-B) WHERE:
Qtot = total required ventilation rate, cfm Afloor = dwelling-unit floor area, ft2
Nbr = number of bedrooms (not to be less than 1)
All dwelling units in a multifamily building shall use the same whole-dwelling unit ventilation system type. The system type installed throughout the building shall be only one of the following three types: supply, exhaust or balanced. The dwelling unit shall comply with one of the following Subsections 1 or 2 below.
Balanced ventilation. A balanced ventilation system shall provide the required whole-dwelling- unit ventilation airflow. Systems with heat recovery or energy recovery that serve a single dwelling unit shall have a fan efficacy of ≤1.0 W/cfm; or

Supply or exhaust ventilation with compartmentalization testing. Continuously operating supply ventilation systems or continuously operating exhaust ventilation systems shall be allowed to be used to provide the required whole-dwelling unit ventilation airflow only if the dwelling unit envelope leakage is less than or equal to 0.3 cubic feet per minute at 50 Pa (0.2 inch water) per ft2 of dwelling unit envelope surface area as confirmed by HERS field verification and diagnostic testing in accordance with the procedures specified in Reference Appendix RA3.8 or NA2.3 as applicable.
Multifamily building central ventilation system airflow rate tolerance. Multifamily building central ventilation systems that serve multiple dwelling units shall have airflow rates in each dwelling unit served that meet or exceed a design ventilation airflow rate specification.
Designers shall specify a design ventilation airflow rate for each dwelling unit that is equal to or greater than the rate specified by Equation 160.2-B.
The design ventilation airflow rate for each dwelling unit shall be stated on the building design plans approved by the enforcement agency.
Airflow in each dwelling unit shall be no more than twenty percent greater than the specified design ventilation airflow rate. Ventilation systems shall utilize mechanical or software airflow control means to ensure each of the dwelling-unit airflows can be maintained at the design ventilation airflow within this tolerance at all times. System airflow control-means may include but are not limited to constant air regulation devices, orifice plates and variable speed central fans.
Local mechanical exhaust. A local mechanical exhaust system shall be installed in each kitchen and bathroom. Systems shall be rated for airflow in accordance with ASHRAE 62.2 Section 7.1.
Nonenclosed kitchens shall have a demand-controlled mechanical exhaust system meeting the requirements of Section 160.2(b)2Avic.
Enclosed kitchens and all bathrooms shall have either one of the following options 1 or 2:
A demand-controlled mechanical exhaust system meeting the requirements of Section 160.2(b)2Avic; or
A continuous mechanical exhaust system meeting the requirements of Section 160.2(b)2Avid.
Demand-controlled mechanical exhaust. A local mechanical exhaust system shall be designed to be operated as needed.
Control and operation. Demand-controlled mechanical exhaust systems shall be provided with at least one of the following controls:
A readily accessible occupant-controlled ON-OFF control.
An automatic control that does not impede occupant ON control.
Ventilation rate and capture efficiency. The system shall meet or exceed either the minimum airflow in accordance with Table 160.2-E or the minimum capture efficiency in accordance with Table 160.2-E, and Table 160.2-G. Capture efficiency ratings shall be determined in accordance with ASTM E3087, and listed in a product directory approved by the Energy Commission.
Continuous mechanical exhaust. A mechanical exhaust system shall be installed to operate continuously. The system may be part of a balanced mechanical ventilation system.
Control and operation. A manual ON-OFF control shall be provided for each continuous mechanical exhaust system. The system shall be designed to operate during all occupiable hours. For multifamily dwelling units, the manual ON-OFF control may be accessible to the dwelling unit occupant; however, the manual ON-OFF control shall not be required to be accessible to the dwelling unit occupant.

Ventilation rate. The minimum delivered ventilation shall be at least the amount indicated in Table 160.2-F during each hour of operation.
Airflow measurement of local mechanical exhaust by the system installer. The airflow required by Section 160.2(b)2Avi is the quantity of indoor air exhausted by the ventilation system as installed in the dwelling unit. When a vented range hood utilizes a capture efficiency rating to demonstrate compliance with Section 160.2(b)2Avic2, the airflow listed in the approved directory corresponding to the compliant capture efficiency rating point shall be met by the installed system. The as-installed airflow shall be verified by the system installer to ensure compliance by use of either Subsection 1 or 2 below:
The system installer shall measure the airflow by using a flow hood, flow grid or other airflow measuring device at the mechanical ventilation fan’s inlet terminals/grilles or outlet terminals/grilles in accordance with the procedures in Reference Appendix RA3.7 or NA2.2 as applicable.
As an alternative to performing an airflow measurement of the system as installed in the dwelling unit, compliance may be demonstrated by installing an exhaust fan and duct system that conforms to the specifications of Table 160.2-H. Visual inspection shall verify the installed system conforms to the requirements of Table 160.2-H.
When using Table 160.2-H for demonstrating compliance, the airflow rating shall be greater than or equal to the value required by Section 160.2(b)2Avi at a static pressure greater than or equal to 0.25 in. of water (62.5 Pa). When a vented range hood utilizes a capture efficiency rating to demonstrate compliance with Section 160.2(b)2Avic2, a static pressure greater than or equal to
0.25 in. of water at the rating point shall not be required, and the airflow listed in the approved directory corresponding to the compliant capture efficiency rating point shall be applied to Table 160.2-H for determining compliance.
Use of Table 160.2-H is limited to ventilation systems that conform to all of the following three specifications:
Total duct length is less than or equal to 25 feet (8 m),
Duct system has no more than three elbows, and
Duct system has exterior termination fitting with a hydraulic diameter greater than or equal to the minimum duct diameter and not less than the hydraulic diameter of the fan outlet.
Sound ratings for local mechanical exhaust. Local mechanical exhaust systems shall be rated for sound in accordance with Section 7.2 of ASHRAE 62.2 at no less than the minimum airflow rate required by Section 160.2(b)2Avi.
Exception to Section 160.2(b)2Avif: Kitchen range hoods may be rated for sound at a static pressure determined at working speed as specified in HVI 916 Section 7.2.
Airflow measurement of whole-dwelling unit ventilation. The airflow required by Section 160.2(b)2Aiv or 160.2(b)2Av is the quantity of outdoor ventilation air supplied or indoor air exhausted by the mechanical ventilation system as installed and shall be measured by using a flow hood, flow grid or other airflow measuring device at the mechanical ventilation fan’s inlet terminals/grilles or outlet terminals/grilles in accordance with the procedures in Reference Appendix Section RA3.7.4.1.1 or NA2.2.4.1.1 as applicable for supply and exhaust systems or RA3.7.4.1.2 or NA2.2.4.1.2 as applicable for balanced systems. Balanced mechanical ventilation system airflow shall be the average of the supply fan and exhaust fan flows.
Sound ratings for whole-dwelling unit ventilation systems. Whole-dwelling unit ventilation systems shall be rated for sound in accordance with Section 7.2 of ASHRAE 62.2 at no less than the minimum airflow rate required by Section 160.2(b)2Aiv or 160.2(b)2Av as applicable.

Label for whole-dwelling unit ventilation system on-off control. Compliance with ASHRAE 62.2 Section
4.4 (Control and Operation) shall require manual ON-OFF control switches associated with whole- dwelling unit ventilation systems to have a label clearly displaying the following text, or equivalent text: “This switch controls the indoor air quality ventilation for the home. Leave switch in the ‘on’ position at all times unless the outdoor air quality is very poor.”
Combustion air and compensating outdoor air or makeup air.
All dwelling units shall conform to the applicable requirements specified in California Mechanical Code Chapter 7, Combustion Air.
All dwelling units shall conform to the requirements in ASHRAE 62.2 Section 6.4, Combustion and Solid-Fuel-Burning Appliances.
Dwelling unit HERS field verification and diagnostic testing.
The whole-dwelling unit ventilation airflow required by Section 160.2(b)2Aiv or 160.2(b)2Av shall be confirmed through HERS field verification and diagnostic testing in accordance with Reference Appendix RA3.7.4.1.1 or NA2.2.4.1.1 as applicable for supply and exhaust systems or RA3.7.4.1.2 or NA2.2.4.1.2 as applicable for balanced systems. Balanced mechanical ventilation system airflow shall be the average of the supply fan and exhaust fan flows. Ventilation airflow of systems with multiple operating modes shall be tested in all modes designed to comply with the required ventilation airflows.
Kitchen local mechanical exhaust—vented range hoods. Vented range hoods installed to comply with local mechanical exhaust requirements specified in Section 160.2(b)2Avi shall be HERS field verified in accordance with Reference Appendix RA3.7.4.3 or NA2.2.4.1.4 as applicable to confirm the model is rated by HVI or AHAM to comply with the following requirements:
The minimum ventilation airflow rate as specified by Section 160.2(b)2Avi, or alternatively the minimum capture efficiency as specified by Section 160.2(b)2Avi; and
The maximum sound rating as specified in Section 160.2(b)2Avif.
Heat recovery ventilation (HRV) and energy recovery ventilation (ERV) system fan efficacy. At a minimum, systems with heat or energy recovery serving a single dwelling unit shall have a fan efficacy of
≤1.0 W/cfm as confirmed by HERS field verification in accordance with Reference Appendix RA3.7.4.4 or NA2.2.4.1.5 as applicable. If Section 170.2(c)3Biva requirements are applicable to the dwelling unit, then HERS field verification shall instead confirm compliance with the maximum fan efficacy and minimum sensible recovery efficiency specified in Section 170.2(c)3Biva in accordance with the procedures specified in Reference Appendix RA3.7.4.4 or NA2.2.4.1.5 as applicable.
Multifamily building central ventilation system field verification.
Central ventilation system duct sealing. Ventilation ducts that conform to Subsections a and b below shall meet the duct sealing requirements in California Mechanical Code Section 603.10 and have leakage that is no greater than six percent of the rooftop fan or central fan design airflow rate as confirmed by field verification in accordance with the procedures in Reference Appendix NA7.18.3. The leakage test shall be conducted using a test pressure of 25 Pa (0.1 inches) for ducts serving six or fewer dwelling units and 50 Pa (0.2 inches) for ducts serving more than six dwelling units, and shall measure the leakage of all ductwork between the central fan and the connection point to the in-unit grille or fan.
The ventilation ducts serve multiple dwelling units.
The ventilation ducts provide continuous airflows or airflows to provide balanced ventilation to meet the requirements specified in Section 160.2(b)2Aiv or 160.2(b)2Av as applicable.
Common use areas. All occupiable spaces shall comply with the requirements of Subsection 1 and shall also comply with either Subsection 2 or Subsection 3:

Air filtration.
Mechanical system types specified in Subsections i, ii and iii below shall be designed to ensure that all recirculated air and all outdoor air supplied to the occupiable space are filtered before passing through any system’s thermal conditioning components. Air filters shall conform to the requirements of Sections 160.2(c)1B, 160.2(c)1C and 160.2(c)1D.
Mechanical space-conditioning systems that supply air to an occupiable space through ductwork exceeding 10 ft (3 m) in length.
Mechanical supply-only ventilation systems and makeup air systems that provide outside air to an occupiable space.
The supply side of mechanical balanced ventilation systems, including heat recovery ventilation systems and energy recovery ventilation systems that provide outside air to an occupiable space.
Exception to Section 160.2(c)1A: For heat recovery ventilators and energy recovery ventilators, the location of the filters required by Section 160.2(c)1A may be downstream of a system’s thermal conditioning component, provided the system is equipped with ancillary filtration upstream of the system’s thermal conditioning component.
Air filter efficiency. The filters shall have a designated efficiency equal to or greater than MERV 13 when tested in accordance with ASHRAE Standard 52.2, or a particle size efficiency rating equal to or greater than 50 percent in the 0.30–1.0 µm range, and equal to or greater than 85 percent in the 1.0–3.0 µm range when tested in accordance with AHRI Standard 680; and
Systems shall be equipped with air filters that meet either Subsection i or ii below.
Nominal two inch minimum depth filter(s); or
Nominal one inch minimum depth filter(s) shall be allowed if the filter(s) are sized according to Equation 160.2-A, based on a maximum face velocity of 150 ft per minute.
Filter racks or grilles shall be gasketed or sealed to eliminate any gaps around the filter to prevent air from bypassing the filter.
Natural ventilation. Naturally ventilated spaces shall be designed in accordance with Sections 160.2(c)2A through 160.2(c)2C and include a mechanical ventilation system designed in accordance with Section 160.2(c)3:
Exception 1 to Section 160.2(c)2: The mechanical ventilation system shall not be required where natural ventilation openings complying with Section 160.2(c)2 are either permanently open or have controls that prevent the openings from being closed during periods of expected occupancy.
Exception 2 to Section 160.2(c)2: The mechanical ventilation system shall not be required where the zone is not served by a space-conditioning system.
Floor area to be ventilated. Spaces or portions of spaces to be naturally ventilated shall be located within a distance based on the ceiling height, as specified in i, ii and iii. The ceiling height (H) to be used in i, ii or iii shall be the minimum ceiling height in the space, or for ceilings that are increasing in height as distance from the operable openings is increased, the ceiling height shall be determined as the average height of the ceiling within 20 ft from the operable opening. [ASHRAE 62.1:6.4.1]
Single side opening. For spaces with operable opening on one side of the space, the maximum distance from the operable opening shall be not more than 2H. [ASHRAE 62.1:6.4.1.1]
Double side opening. For spaces with operable openings on two opposite sides of the space, the maximum distance from the operable opening shall be not more than 5H. [ASHRAE 62.1:6.4.1.2]
Corner opening. For spaces with operable openings on two adjacent sides of a space, the maximum distance from the operable openings shall be not more than 5H along a line drawn between the two

openings that are the farthest apart. Floor area outside that line shall comply with i or ii. [ASHRAE 62.1:6.4.1.3]
Ceiling height. The ceiling height (H) to be used in Sections 160.2(c)2Ai through 160.2(c)2Aiii shall be the minimum ceiling height in the space.
Exception to Section 160.2(c)2Aiv: For ceilings that are increasing in height as distance from the opening is increased, the ceiling height shall be determined as the average height of the ceiling within 20 feet from the operable openings. [ASHRAE 62.1:6.4.1.4]
Location and size of openings. Spaces or portions of spaces to be naturally ventilated shall be permanently open to operable wall openings directly to the outdoors. The openable area shall be not less than 4 percent of the net occupiable floor area. Where openings are covered with louvers or otherwise obstructed, the openable area shall be based on the net free unobstructed area through the opening. Where interior rooms, or portions of rooms, without direct openings to the outdoors are ventilated through adjoining rooms, the opening between rooms shall be permanently unobstructed and have a free area of not less than 8 percent of the area of the interior room or less than 25 square feet. [ASHRAE 62.1:6.4.2]
Control and accessibility. The means to open the required operable opening shall be readily accessible to building occupants whenever the space is occupied. Controls shall be designed to coordinate operation of the natural and mechanical ventilation systems. [ASHRAE 62.1:6.4.3]
Mechanical ventilation. Occupiable spaces shall be ventilated with a mechanical ventilation system capable of providing an outdoor airflow rate (Vz) to the zone no less than the larger of A or B as described below:
The outdoor airflow rate to the zone (Vz) shall be determined in accordance with Equation 160.2-G; or Vz = Ra x Az	(Equation 160.2-G)
Where:
Ra = Outdoor airflow rate required per unit area as determined from Table 160.2-B.
Az = Zone floor area is the net occupiable floor area of the ventilation zone in square feet.
For spaces designed for an expected number of occupants, the outdoor airflow rate to the zone (Vz) shall be determined in accordance with Equation 160.2-H;
Vz = Rp x Pz	(Equation 160.2-H)
Where:
Rp = 15 cubic feet per minute of outdoor airflow per person
Pz = The expected number of occupants. The expected number of occupants shall be the expected number specified by the building designer. For spaces with fixed seating, the expected number of occupants shall be determined in accordance with the California Building Code.
Exception to Section 160.2(c)3: Transfer air. The rate of outdoor air required by Section 160.2(c)3 may be provided with air transferred from other ventilated space if:
Use of transfer air is in accordance with Section 160.2(c)8; and
The outdoor air that is supplied to all spaces combined is sufficient to meet the requirements of Section 160.2(c)3 for each space individually.
Exhaust ventilation. The design exhaust airflow shall be determined in accordance with the requirements in Table 160.2-C. Exhaust makeup air shall be permitted to be any combination of outdoor air, recirculated air or transfer air. [ASHRAE 62.1:6.5.1]
Operation and control requirements for minimum quantities of outdoor air.
Times of occupancy. The minimum rate of outdoor air required by Section 160.2(c) shall be supplied to each space at all times when the space is usually occupied.

Exception 1 to Section 160.2(c)5A: Demand control ventilation. In intermittently occupied spaces that do not have processes or operations that generate dusts, fumes, mists, vapors or gases and are not provided with local exhaust ventilation (such as indoor operation of internal combustion engines or areas designated for unvented food service preparation), the rate of outdoor air may be reduced if the ventilation system serving the space is controlled by a demand control ventilation device complying with Section 160.2(c)5D or by an occupant sensor ventilation control device complying with Section 160.2(c)5E.
Exception 2 to Section 160.2(c)5A: Temporary reduction. The rate of outdoor air provided to a space may be reduced below the level required by Section 160.2(c) for up to 30 minutes at a time if the average rate for each hour is equal to or greater than the required ventilation rate.
Preoccupancy. The lesser of the minimum rate of outdoor air required by Section 160.2(c) or three complete air changes shall be supplied to the entire building during the 1-hour period immediately before the building is normally occupied.
Required demand control ventilation. Demand ventilation controls complying with Section 160.2(c)5D are required for a space with a design occupant density, or a maximum occupant load factor for egress purposes in the CBC, greater than or equal to 25 people per 1000 square feet (40 square feet or less per person) if the system serving the space has one or more of the following:
an air economizer; or
modulating outside air control; or
design outdoor airflow rate > 3,000 cfm.
Exception 1 to Section 160.2(c)5C: Where space exhaust is greater than the design ventilation rate specified in Section 160.2(c)3 minus 0.2 cfm per ft² of conditioned area.
Exception 2 to Section 160.2(c)5C: Spaces that have processes or operations that generate dusts, fumes, mists, vapors or gases and are not provided with local exhaust ventilation, such as indoor operation of internal combustion engines or areas designated for unvented food service preparation, daycare sickrooms, science labs, barber shops or beauty and nail salons, shall not install demand control ventilation.
Exception 3 to Section 160.2(c)5C: Spaces with an area of less than 150 square feet or a design occupancy of less than 10 people as specified by Section 160.2(c)3.
Demand control ventilation devices.
For each system with demand control ventilation (DCV), CO2 sensors shall be installed in each room that meets the criteria of Section 160.2(c)5C with no less than one sensor per 10,000 ft² of floor space. When a zone or a space is served by more than one sensor, a signal from any sensor indicating that CO2 is near or at the setpoint within the zone or space shall trigger an increase in ventilation.
CO2 sensors shall be located in the room between 3 ft and 6 ft above the floor or at the anticipated height of the occupants’ heads.
Demand ventilation controls shall maintain CO2 concentrations less than or equal to 600 ppm plus the outdoor air CO2 concentration in all rooms with CO2 sensors.
Exception to Section 160.2(c)5Diii: The outdoor air ventilation rate is not required to be larger than the design outdoor air ventilation rate required by Section 160.2(c)3 regardless of CO2 concentration.
Outdoor air CO2 concentration shall be determined by one of the following:

CO2 concentration shall be assumed to be 400 ppm without any direct measurement; or
CO2 concentration shall be dynamically measured using a CO2 sensor located within 4 ft of the outdoor air intake.
When the system is operating during hours of expected occupancy, the controls shall maintain system outdoor air ventilation rates no less than the rate listed in Table 160.2-B for DCV, times the conditioned floor area for spaces with CO2 sensors, plus the rate required by Section 160.2(c)3 for other spaces served by the system, or the exhaust air rate, whichever is greater.
CO2 sensors shall be certified by the manufacturer to be accurate within plus or minus 75 ppm at a 600 and 1000 ppm concentration when measured at sea level and 25°C, factory calibrated, and certified by the manufacturer to require calibration no more frequently than once every 5 years. Upon detection of sensor failure, the system shall provide a signal that resets to supply the minimum quantity of outside air to levels required by Section 160.2(c)3 to the zone serviced by the sensor at all times that the zone is occupied.
The CO2 sensor(s) reading for each zone shall be displayed continuously, and shall be recorded on systems with digital direct controls (DDC) to the zone level.
Occupant sensing ventilation control devices. Occupant sensing ventilation controls are required for space- conditioning zones that are both permitted to have their ventilation air reduced to zero while in occupied- standby mode per Table 160.2-B and required to install occupant sensors to comply with Sections 160.5(b)4Cv, vi and vii. Occupant sensing ventilation control devices used to reduce the rate of outdoor air flow when occupants are not present shall comply with the following:
Occupant sensors shall meet the requirements in Section 110.9(b)4 and shall have suitable coverage and placement to detect occupants in the entire space ventilated.
When occupant sensors controlling lighting are also used for ventilation, the ventilation signal shall be independent of daylighting, manual lighting overrides or manual control of lighting.
When a single zone damper or a single zone system serves multiple rooms, there shall be an occupant sensor in each room and the zone shall not be considered vacant until all rooms in the zone are vacant.
One hour prior to normal scheduled occupancy, the occupant sensor ventilation control shall allow preoccupancy purge as described in Section 160.2(c)5B.
When the zone is scheduled to be occupied and occupant sensing controls in all rooms and areas served by the zone indicate the spaces are unoccupied, the zone shall be placed in occupied- standby mode.
In 5 minutes or less after entering occupied-standby mode, mechanical ventilation to the zone shall be shut off until the space becomes occupied or until ventilation is needed to provide space heating or conditioning. When mechanical ventilation is shut off to the zone, the ventilation system serving the zone shall reduce the system outside air rate by the amount of outside air required for the zone.
Where the system providing space conditioning also provides ventilation to the zone, in 5 minutes or less after entering occupied-standby mode, space-conditioning zone setpoints shall be reset in accordance with Section 120.2(e)3.
Ducting for zonal heating and cooling units. Where a return plenum is used to distribute outdoor air to a zonal heating or cooling unit that then supplies the air to a space in order to meet the requirements of Section 160.2(c)3, the outdoor air shall be ducted to discharge either:
Within 5 feet of the unit; or
Within 15 feet of the unit, substantially toward the unit and at a velocity not less than 500 feet per minute.
Design and control requirements for quantities of outdoor air.
All mechanical ventilation and space-conditioning systems shall be designed with and have installed ductwork, dampers and controls to allow outside air rates to be operated at the minimum levels specified in Section

160.2(c)3 or the rate required for make-up of exhaust systems that are required for an exempt or covered process, for control of odors or for the removal of contaminants within the space.
All variable air volume mechanical ventilation and space-conditioning systems shall include dynamic controls that maintain measured outside air ventilation rates within 10 percent of the required outside air ventilation rate at both full and reduced supply airflow conditions. Fixed minimum damper position is not considered to be dynamic and is not an allowed control strategy.
Measured outdoor air rates of constant volume mechanical ventilation and space-conditioning systems shall be within 10 percent of the required outside air rate.
Air classification and recirculation limitations. Air classification and recirculation limitations of air shall be based on the air classification as listed in Table 160.2-B or Table 160.2-D, in accordance with the following:
Class 1 air is air with significant contaminant concentration, significant sensory-irritation intensity or offensive odor. Recirculation or transfer of Class 1 air to any space shall be permitted; [ASHRAE 62.1:5.16.3.1]
Class 2 air is air with moderate contaminant concentration, mild sensory-irritation intensity or mildly offensive odor (Class 2 air also includes air that is not necessarily harmful or objectionable but that is inappropriate for transfer or recirculation to spaces used for different purposes). Recirculation or transfer of Class 2 air shall be permitted in accordance with Sections 160.2(c)8Bi through 160.2(c)8Bv:
Recirculation of Class 2 air within the space of origin shall be permitted [ASHRAE 62.1:5.16.3.2.1].
Recirculation or transfer of Class 2 to other Class 2 or Class 3 spaces shall be permitted, provided that the other spaces are used for the same or similar purpose or task and involve the same or similar pollutant sources as the Class 2 space [ASHRAE 62.1:5.16.3.2.2]; or
Transfer of Class 2 air to toilet rooms [ASHRAE 62.1:5.16.3.2.3]; or
Recirculation or transfer of Class 2 air to Class 4 spaces [ASHRAE 62.1:5.16.3.2.4]; or
Class 2 air shall not be recirculated or transferred to Class 1 spaces. [ASHRAE 62.1:5.16.3.2.5]
Exception to Section 160.2(c)8Bv: When using any energy recovery device, recirculation from leakage, carryover or transfer from the exhaust side of the energy recovery device is permitted. Recirculated Class 2 air shall not exceed 10 percent of the outdoor air intake flow.
Class 3 air is air with significant contaminant concentration, significant sensory-irritation intensity or offensive odor. Recirculation or transfer of Class 3 air shall be permitted in accordance with Sections 160.2(c)8Ci and 160.2(c)8Cii:
Recirculation of Class 3 air within the space of origin shall be permitted. [ASHRAE 62.1:5.16.3.3.1]
Class 3 air shall not be recirculated or transferred to any other space. [ASHRAE 62.1:5.16.3.3.2].
Exception to Section 160.2(c)8Cii: When using any energy recovery device, recirculation from leakage, carryover or transfer from the exhaust side of the energy recovery device is permitted. Recirculated Class 3 air shall not exceed 5 percent of the outdoor air intake flow.
Class 4 air is air with highly objectionable fumes or gases or with potentially dangerous particles, bioaerosols or gases at concentrations high enough to be considered as harmful. Class 4 air shall not be recirculated or transferred to any space or recirculated within the space of origin. [ASHRAE 62.1:5.16.3.4]
Ancillary spaces. Redesignation of Class 1 air to Class 2 air shall be permitted for Class 1 spaces that are ancillary to Class 2 spaces. [ASHRAE 62.1:5.16.2.3]
Transfer. A mixture of air that has been transferred through or returned from spaces or locations with different air classes shall be redesignated with the highest classification among the air classes mixed. [ASHRAE 62.1:5.16.2.2]
Classification. Air leaving each space or location shall be designated at an expected air-quality classification not less than that shown in Table 160.2-B, 160.2-C or 160.2-D. Air leaving spaces or locations that are not

listed in Table 160.2-B, 160.2-C or 160.2-D shall be designated with the same classification as air from the most similar space or location listed in terms of occupant activities and building construction.
Parking garages. Mechanical ventilation systems for enclosed parking garages in multifamily buildings shall comply with Section 120.6(c).

TABLE 160.2-A: Infiltration Effectiveness Weather and Shielding Factors [ASHRAE 62.2: Table B1

TMY3	wsf	Weather Station	Latitude	Longitude	State	
690150	0.50	Twentynine Palms	34.30	–116.17	California	
722860	0.43	March AFB	33.90	–117.25	California	
722868	0.45	Palm Springs Intl	33.83	–116.50	California	
722869	0.42	Riverside Muni	33.95	–117.45	California	
722880	0.39	Burbank–Glendale–Pasadena AP	34.20	–118.35	California	
722885	0.39	Santa Monica Muni	34.02	–118.45	California	
722886	0.39	Van Nuys Airport	34.22	–118.48	California	
722895	0.55	Lompoc (AWOS)	34.67	–120.47	California	
722897	0.51	San Luis Co Rgnl	35.23	–120.63	California	
722899	0.45	Chino Airport	33.97	–117.63	California	
722900	0.38	San Diego Lindbergh Field	32.73	–117.17	California	
722903	0.39	San Diego/Montgomery	32.82	–117.13	California	
722904	0.40	Chula Vista Brown Field NAAS	32.58	–116.98	California	
722906	0.39	San Diego North Island NAS	32.70	–117.20	California	
722926	0.40	Camp Pendleton MCAS	33.30	–117.35	California	
722927	0.38	Carlsbad/Palomar	33.13	–117.28	California	
722930	0.39	San Diego Miramar NAS	32.87	–117.13	California	
722950	0.42	Los Angeles Intl Arpt	33.93	–118.40	California	
722956	0.38	Jack Northrop Fld H	33.92	–118.33	California	
722970	0.38	Long Beach Daugherty Fld	33.83	–118.17	California	
722976	0.34	Fullerton Municipal	33.87	–117.98	California	
722977	0.36	Santa Ana John Wayne AP	33.68	–117.87	California	
723805	0.51	Needles Airport	34.77	–114.62	California	
723810	0.59	Edwards AFB	34.90	–117.87	California	

TABLE 160.2-A: Infiltration Effectiveness Weather and Shielding Factors [ASHRAE 62.2: Table B1] (continued)
TMY3	wsf	Weather Station	Latitude	Longitude	State	
723815	0.58	Daggett Barstow–Daggett AP	34.85	–116.80	California	
723816	0.62	Lancaster Gen Wm Fox Field	34.73	–118.22	California	
723820	0.57	Palmdale Airport	34.63	–118.08	California	
723830	0.68	Sandberg	34.75	–118.72	California	
723840	0.43	Bakersfield Meadows Field	35.43	–119.05	California	
723890	0.45	Fresno Yosemite Intl AP	36.78	–119.72	California	
723895	0.42	Porterville (AWOS)	36.03	–119.07	California	
723896	0.43	Visalia Muni (AWOS)	36.32	–119.40	California	
723910	0.45	Point Mugu Nf	34.12	–119.12	California	
723925	0.44	Santa Barbara Municipal AP	34.43	–119.85	California	
723926	0.43	Camarillo (AWOS)	34.22	–119.08	California	
723927	0.45	Oxnard Airport	34.20	–119.20	California	
723940	0.52	Santa Maria Public Arpt	34.92	–120.47	California	
723965	0.53	Paso Robles Municipal Arpt	35.67	–120.63	California	
724800	0.55	Bishop Airport	37.37	–118.35	California	
724815	0.46	Merced/Macready Fld	37.28	–120.52	California	
724830	0.51	Sacramento Executive Arpt	38.50	–121.50	California	
724837	0.45	Beale AFB	39.13	–121.43	California	
724838	0.50	Yuba Co	39.10	–121.57	California	
724839	0.51	Sacramento Metropolitan AP	38.70	–121.58	California	
724915	0.49	Monterey Naf	36.60	–121.87	California	
724917	0.54	Salinas Municipal AP	36.67	–121.60	California	
724920	0.50	Stockton Metropolitan Arpt	37.90	–121.23	California	
724926	0.47	Modesto City–County AP	37.63	–120.95	California	
724927	0.53	Livermore Municipal	37.70	–121.82	California	
724930	0.54	Oakland Metropolitan Arpt	37.72	–122.22	California	
724935	0.47	Hayward Air Term	37.67	–122.12	California	
724936	0.53	Concord–Buchanan Field	38.00	–122.05	California	
724940	0.60	San Francisco Intl AP	37.62	–122.40	California	
724945	0.48	San Jose Intl AP	37.37	–121.93	California	
724955	0.55	Napa Co. Airport	38.22	–122.28	California	
724957	0.49	Santa Rosa (AWOS)	38.52	–122.82	California	
725845	0.44	Blue Canyon AP	39.30	–120.72	California	
725846	0.66	Truckee–Tahoe	39.32	–120.13	California	
725847	0.64	South Lake Tahoe	38.90	–120.00	California	
725905	0.47	Ukiah Municipal AP	39.13	–123.20	California	

TABLE 160.2-A: Infiltration Effectiveness Weather and Shielding Factors [ASHRAE 62.2:Table B1] (continued)
TMY3	wsf	Weather Station	Latitude	Longitude	State	
725910	0.50	Red Bluff Municipal Arpt	40.15	–122.25	California	
725920	0.47	Redding Municipal Arpt	40.52	–122.32	California	
725945	0.56	Arcata Airport	40.98	–124.10	California	
725946	0.60	Crescent City Faa Ai	41.78	–124.23	California	
725955	0.55	Montague Siskiyou County AP	41.78	–122.47	California	
725958	0.59	Alturas	41.50	–120.53	California	
745090	0.45	Mountain View Moffett Fld NAS	37.40	–122.05	California	
745160	0.67	Travis Field AFB	38.27	–121.93	California	
746120	0.52	China Lake Naf	35.68	–117.68	California	
747020	0.50	Lemoore Reeves NAS	36.33	–119.95	California	
747185	0.46	Imperial	32.83	–115.58	California	
747187	0.46	Palm Springs Thermal AP	33.63	–116.17	California	
747188	0.48	Blythe Riverside Co Arpt	33.62	–114.72	California	

TABLE 160.2-B – Minimum Ventilation Rates for Multifamily Common Use Areas

Occupancy Category3	Area Outdoor Air Rate1 Ra
cfm/ft2	Min Air Rate for DC cfm/ft2V2	Air Class	Notes	
Daycare (through age 4)	0.21	0.15	2		
Multiuse assembly	0.50	0.15	1	F	
Dining rooms	0.50	0.15	2		
Bars, cocktail lounges	0.50	0.20	2		
Kitchen (cooking)	0.15		2		
Break rooms	0.50	0.15	1	F	
Coffee stations	0.50	0.15	1	F	
Conference/meeting	0.50	0.15	1	F	
Corridors	0.15		1	F	
Occupiable storage rooms for liquids or gels	0.15		2	B	
Laundry rooms, central	0.15		2		
Lobbies/pre-function	0.50	0.15	1	F	
Breakrooms	0.50	0.15			
Occupiable storage rooms for dry materials	0.15				
Office space	0.15		1		
Reception areas	0.15		1	F	
Telephone/data entry	0.15		1	F	
Computer (not printing)	0.15				
Freezer and refrigerated spaces (<50oF)	-		1	F	
Shipping/receiving	0.15				

TABLE 160.2-B – Minimum Ventilation Rates for Multifamily Common Use Areas (Continued)
Occupancy Category3	Area Outdoor Air Rate1 Ra
cfm/ft2	Min Air Rate for DC cfm/ft2V2	Air Class	Notes	
Gym, sports arena (play area)	0.50	0.15	2	E	
Swimming (pool)	0.15		2	C	
Swimming (deck)	0.50	0.15	2	C	
Disco/dance floors	1.50	0.15	2	F	
Health club/aerobics room/weight rooms	0.15		2		
Game arcades	0.68	0.15	1		
All others	0.15				
General:

Ra was determined as being the larger of the area method and the default per person method. The occupant density used in the per person method was assumed to be one half of the maximum occupant load assumed for egress purposes in the CBC.
If this column specifies a minimum cfm/ft2 then it shall be used to comply with Section160.2(c)5E.
For spaces not included in this table, the spaces in Table 120.1-A shall apply. Specific Notes:
A – RESERVED
B – Rate may not be sufficient where stored materials include those having potentially harmful emissions.
C – Rate does not allow for humidity control. “Deck area” refers to the area surrounding the pool that is capable of being wetted during pool use or when the pool is occupied. Deck area that is not expected to be wetted shall be designated as an occupancy category.
D – RESREVED.
E – Where combustion equipment is intended to be used on the playing surface or in the space, additional dilution ventilation, source control, or both shall be provided.
F – Ventilation air for this occupancy category shall be permitted to be reduced to zero when the space is in occupied-standby mode.

TABLE 160.2-C – Minimum Exhaust Rates
[ASHRAE 62.1: TABLE 6.5]

Occupancy Category3	Exhaust Rete,
cfm/unit	Exhaust Rate,
cfm/ft2	Air Class	Notes	
Copy, printing rooms	-	0.50	2		
Janitor closets, trash rooms, recycling	-	1.00	3		
Kitchenettes	-	0.30	2		
Kitchens – commercial	-	0.70	2		
Locker rooms for athletic or industrial facilities	-	0.50	2		
All other locker rooms	-	0.25	2		
Shower rooms	20/50	-	2	G, H	
Parking garages	-	0.75	2	C	
Pet shops (animal areas)	-	0.90	2		
Soiled laundry storage rooms	-	1.00	3	F	
Storage rooms, chemical	-	1.50	4	F	
Toilets – private	25/50	-	2	E	
Toilets – public	50/70	-	2	D	
General:
3For spaces not included in this table, the spaces in Table 120.1-B shall apply. Notes:
A –Reserved
B –Reserved
C – Exhaust shall not be required where two or more sides comprise walls that are at least 50% open to the outside.
D – Rate is per water closet, urinal, or both. Provide the higher rate where periods of heavy use are expected to occur. The lower rate shall be permitted to be used otherwise.
E – Rate is for a toilet room intended to be occupied by one person at a time. For continuous systems operation during hours of use, the lower rate shall be permitted to be used. Otherwise the higher rate shall be used.
F – See other applicable standards for exhaust rate.
G – For continuous system operation, the lower rate shall be permitted to be used. Otherwise the higher rate shall be used.
H – Rate is per showerhead.
TABLE 160.2-D – Airstreams or Sources
[ASHRAE 62.1:Table 5.16.1]

Description	Air Class	
Commercial kitchen grease hoods	4	
Commercial kitchen hoods other than grease	3	
Hydraulic elevator machine room	2	

Table 160.2-E: Demand-Controlled Local Ventilation Exhaust Airflow Rates and Capture Efficiency
Application	Compliance Criteria	
Enclosed Kitchen or Nonenclosed Kitchen	Vented range hood, including appliance-range hood combinations shall meet either the capture efficiency (CE) or the airflow rate specified in Table 160.2-G as applicable.	
Enclosed Kitchen	Other kitchen exhaust fans, including downdraft: 300 cfm (150 L/s) or a capacity of 5 ACH	
Nonenclosed Kitchen	Other kitchen exhaust fans, including downdraft: 300 cfm (150 L/s)	
Bathroom	50 cfm (25 L/s)	

Table 160.2-F: Continuous Local Ventilation Exhaust Airflow Rates
Application	Airflow	
Enclosed kitchen	5 ach, based on kitchen volume	
Bathroom	20 cfm (10 L/s)	

Page 380	2022 Building Energy Efficiency Standards

Table 160.2-G: Kitchen Range Hood Airflow Rates (cfm) and ASTM E3087 Capture Efficiency (CE) Ratings According to Dwelling Unit Floor Area and Kitchen Range Fuel Type
Dwelling Unit Floor Area (ft2)	Hood Over Electric Range	Hood Over Natural Gas Range	
>1500	50% CE or 110 cfm	70% CE or 180 cfm	
>1000 - 1500	50% CE or 110 cfm	80% CE or 250 cfm	
750 - 1000	55% CE or 130 cfm	85% CE or 280 cfm	
<750	65% CE or 160 cfm	85% CE or 280 cfm	

Table 160.2-H: Prescriptive Ventilation System Duct Sizing [ASHRAE 62.2:Table 5-3]
Fan Airflow Rating, cfm at minimum static pressuref
0.25 in. water
(L/s at minimum 62.5 Pa)	≤50
(25)	≤80
(40)	≤100
(50)	≤125 (60)	≤150 (70)	≤175 (85)	≤200 (95)	≤250 (120)	≤350 (165)	≤400
(190)	≤450 (210)	≤700 (330)	≤800 (380)	
Minimum Duct Diameter, in. (mm)
a,b For Rigid duct	4 e
(100)	5
(125)	5
(125)	6
(150)	6
(150)	7
(180)	7
(180)	8
(205)	9
(230)	10
(255)	10
(255)	12
(305)	12 d
(305)	
Minimum Duct Diameter, in. (mm)
a,b For Flex duct c	4
(100)	5
(125)	6
(150)	6
(150)	7
(150)	7
(180)	8
(205)	8
(205)	9
(230)	10
(255)	NP	NP	NP	
Footnotes for Table 150.0-H:
For noncircular ducts, calculate the diameter as four times the cross-sectional area divided by the perimeter.
NP = application of the prescriptive table is not permitted for this scenario.
Use of this table for verification of flex duct systems requires flex duct to be fully extended and any flex duct elbows to have a minimum bend radius to duct diameter ratio of 1.0.
For this scenario, use of elbows is not permitted.
For this scenario, 4 in. (100 mm) oval duct shall be permitted, provided the minor axis of the oval is greater than or equal to 3 in. (75 mm)
When a vented range hood utilizes a capture efficiency rating to demonstrate compliance with 160.2(b)2Avic2, a static pressure greater than or equal to 0.25 in. of water at the rating point shall not be required, and the airflow listed in the approved directory corresponding to the compliant capture efficiency rating point shall be applied to Table 160.2-H for determining compliance.
Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections 25007, 25008, 25218.5, 25310,
25402, 25402.1, 25402.4, 25402.5, 25402.8, and 25943, Public Resources Code.

SECTION 160.3 – MANDATORY REQUIREMENTS FOR SPACE CONDITIONING SYSTEMS IN MULTIFAMILY BUILDINGS
Space conditioning systems serving multifamily dwelling units and common use areas shall comply with the applicable requirements of Sections 160.3(a) through 160.3(c).
Controls. Space-conditioning systems serving dwelling units and common use areas in multifamily buildings shall comply with applicable requirements of Section 160.3(a)1 or 160.3(a)2.
Dwelling unit thermostats. All heating or cooling systems, including heat pumps, not controlled by a central energy management control system (EMCS) shall have a setback thermostat, as specified in Section 110.2(c).
Common use area controls. Heating or cooling systems serving common use areas of multifamily buildings shall comply with application requirements of Sections 160.3(a)2A through 160.3(a)2J.
Exception to Section 160.3(a)2: Heating or cooling systems exclusively serving dwelling units and common use areas providing shared provisions for living, eating, cooking or sanitation to dwelling units that would otherwise lack these provisions may instead comply with Section 160.3(a)1.
Thermostatic controls for each zone. The supply of heating and cooling energy to each space-conditioning zone shall be controlled by an individual thermostatic control that responds to temperature within the zone and that meets the applicable requirements of Section 160.3(a)2B. An energy management control system (EMCS) may be installed to comply with the requirements of one or more thermostatic controls if it complies with all applicable requirements for each thermostatic control.
Exception to Section 160.3(a)2A: An independent perimeter heating or cooling system may serve more than one zone without individual thermostatic controls if:
All zones are also served by an interior cooling system; and
The perimeter system is designed solely to offset envelope heat losses or gains; and
The perimeter system has at least one thermostatic control for each building orientation of 50 feet or more; and
The perimeter system is controlled by at least one thermostat located in one of the zones served by the system.
Criteria for zonal thermostatic controls. The individual thermostatic controls required by Section 160.3(a)2A shall meet the following requirements as applicable:
Where used to control comfort heating, the thermostatic controls shall be capable of being set, locally or remotely, down to 55°F or lower.
Where used to control comfort cooling, the thermostatic controls shall be capable of being set, locally or remotely, up to 85°F or higher.
Where used to control both comfort heating and comfort cooling, the thermostatic controls shall meet Items i and ii and shall be capable of providing a temperature range or deadband of at least 5°F within which the supply of heating and cooling energy to the zone is shut off or reduced to a minimum.
Exception to Section 160.3(a)2Biii: Systems with thermostats that require manual changeover between heating and cooling modes.
Thermostatic controls for all single zone air conditioners and heat pumps shall comply with the requirements of Sections 110.2(c) and 110.12(a) and, if equipped with DDC to the zone level, with the automatic demand shed controls of Section 110.12(b).
Exception to Section 160.3(a)2Biv: Package terminal air conditioners, package terminal heat pumps, room air conditioners and room air-conditioner heat pumps.

Heat pump controls. All heat pumps with supplementary electric resistance heaters shall be installed with controls that comply with Section 110.2(b).
Shut-off and reset controls for space-conditioning systems. Each space-conditioning system shall be installed with controls that comply with the following:
The control shall be capable of automatically shutting off the system during periods of nonuse and shall have:
An automatic time switch control device complying with Section 110.9, with an accessible manual override that allows operation of the system for up to 4 hours; or
An occupancy sensor; or
A 4-hour timer that can be manually operated.
The control shall automatically restart and temporarily operate the system as required to maintain:
A setback heating thermostat setpoint if the system provides mechanical heating; and
Exception to Section 160.3(a)2Diia: Thermostat setback controls are not required in multifamily buildings in areas where the Winter Median of Extremes outdoor air temperature determined in accordance with Section 170.2(c)1C is greater than 32°F.
A setup cooling thermostat setpoint if the system provides mechanical cooling.
Exception to Section 160.3(a)2Diib: Thermostat setup controls are not required in multifamily buildings in areas where the summer design dry-bulb 0.5-percent temperature determined in accordance with Section 170.2(c)1C is less than 100°F.
Occupant sensing zone controls. Where the system providing space conditioning also provides the ventilation required by Section 160.2(c)3 and includes occupant sensor ventilation control as specified in Section 160.2(c)5E, the occupant sensing zone controls shall additionally comply with the following:
Occupant sensing zone controls shall comply with the occupant sensor ventilation control device requirements of Section 160.3(c)5E and allow preoccupancy ventilation requirements of Section 160.3(c)5B; and
In 5 minutes or less after entering occupied-standby mode as described in Section 160.2(c)5:
Automatically set up the operating cooling temperature setpoint by 2°F or more and set back the operating heating temperature setpoint by 2°F or more; or
For multiple zone systems with Direct Digital Controls (DDC) to the zone level, set up the operating cooling temperature setpoint by 0.5°F or more and set back the operating heating temperature setpoint by 0.5°F or more.
In 5 minutes or less after entering occupied-standby mode, mechanical ventilation to the zone shall remain off whenever the space temperature is between the active heating and cooling setpoints.
Exception to Section 160.3(a)2Diii: Zones that are only ventilated by a natural ventilation system in accordance with Section 120.1(c)2.
Exception 1 to Sections 160.3(a)2Di, ii and iii: Where it can be demonstrated to the satisfaction of the enforcing agency that the system serves an area that must operate continuously.
Exception 2 to Sections 160.3(a)2Di, ii and iii: Systems with full load demands of 2 kW or less, if they have a readily accessible manual shut-off switch.
Dampers for air supply and exhaust equipment. Outdoor air supply and exhaust equipment shall be installed with dampers that automatically close upon fan shutdown.
Exception 1 to Section 160.3(a)2E: Equipment that serves an area that must operate continuously.

Exception 2 to Section 160.3(a)2E: Gravity and other nonelectrical equipment that has readily accessible manual damper controls.
Exception 3 to Section 160.3(a)2E: At combustion air intakes and shaft vents.
Exception 4 to Section 160.3(a)2E: Where prohibited by other provisions of law.
Isolation area devices. Each space-conditioning system serving multiple zones with a combined conditioned floor area of more than 25,000 square feet shall be designed, installed and controlled to serve isolation areas.
Each zone, or any combination of zones not exceeding 25,000 square feet, shall be a separate isolation area.
Each isolation area shall be provided with isolation devices, such as valves or dampers that allow the supply of heating or cooling to be reduced or shut off independently of other isolation areas.
Each isolation area shall be controlled by a device meeting the requirements of Section 160.3(a)2Di.
Exception to Section 160.3(a)2F: Zones designed to be conditioned continuously.
Automatic demand shed controls. See Section 110.12 for requirements for automatic demand shed controls.
Economizer Fault Detection and Diagnostics (FDD). All newly installed air handlers with a mechanical cooling capacity over 33,000 Btu/hr and an installed air economizer shall include a stand-alone or integrated Fault Detection and Diagnostics (FDD) system in accordance with Subsections 160.3(a)2Hi through 160.3(a)2Hviii.
The following temperature sensors shall be permanently installed to monitor system operation: outside air, supply air and, when required for differential economizer operation, a return air sensor; and
Temperature sensors shall have an accuracy of ±2°F over the range of 40°F to 80°F; and
The controller shall have the capability of displaying the value of each sensor; and
The controller shall provide system status by indicating the following conditions:
Free cooling available;
Economizer enabled;
Compressor enabled;
Heating enabled, if the system is capable of heating; and
Mixed air low limit cycle active.
The unit controller shall allow manual initiation of each operating mode so that the operation of cooling systems, economizers, fans and heating systems can be independently tested and verified; and
Faults shall be reported in one of the following ways:
Reported to an Energy Management Control System regularly monitored by facility personnel.
Annunciated locally on one or more zone thermostats, or a device within five feet of zone thermostat(s), clearly visible, at eye level and meeting the following requirements:
On the thermostat, the device or an adjacent written sign, display instructions to contact appropriate building personnel or an HVAC technician; and
In buildings with multiple tenants, the annunciation shall either be within property management offices or in a common space accessible by the property or building manager.
Reported to a fault management application that automatically provides notification of the fault to remote HVAC service provider.
The FDD system shall detect the following faults:
Air temperature sensor failure/fault;

Not economizing when it should;
Economizing when it should not;
Damper not modulating; and
Excess outdoor air.
The FDD system shall be certified by the Energy Commission as meeting the requirements of Sections 160.3(a)2Hi through 160.3(a)2Hvii in accordance with Section 110.0 and JA6.3.
Exception to Section 160.3(a)2Hviii: FDD algorithms based in direct digital control systems are not required to be certified to the Energy Commission.
Direct Digital Controls (DDC). Direct digital controls to the zone shall be provided as specified by Table 160.3-C.
The provided DDC system shall meet the control logic requirements of Sections 160.3(a)2E and 160.3(a)2G, and be capable of the following:
Monitoring zone and system demand for fan pressure, pump pressure, heating and cooling;
Transferring zone and system demand information from zones to air distribution system controllers and from air distribution systems to heating and cooling plant controllers;
Automatically detecting the zones and systems that may be excessively driving the reset logic and generate an alarm or other indication to the system operator;
Readily allow operator removal of zone(s) from the reset algorithm;
For new buildings, trending and graphically displaying input and output points; and
Resetting heating and cooling setpoints in all noncritical zones upon receipt of a signal from a centralized contact or software point as described in Section 160.3(a)2G.
Optimum start/stop controls. Space-conditioning systems with DDC to the zone level shall have optimum start/stop controls. The control algorithm shall, as a minimum, be a function of the difference between space temperature and occupied setpoint, the outdoor air temperature, and the amount of time prior to scheduled occupancy. Mass radiant floor slab systems shall incorporate floor temperature onto the optimum start algorithm.
Exception to Section 160.3(a)2J: Systems that must operate continuously.
Dwelling unit space-conditioning and air distribution systems.
Building cooling and heating loads. Building heating and cooling loads shall be determined using a method based on any one of the following, using cooling and heating loads as two of the criteria for equipment sizing and selection:
The ASHRAE Handbook, Equipment Volume, Applications Volume and Fundamentals Volume; or
The SMACNA Residential Comfort System Installation Standards Manual; or
The ACCA Manual J.
Note: Heating systems are required to have a minimum heating capacity adequate to meet the minimum requirements of the CBC.
Design conditions. Design conditions shall be determined in accordance with the following:
For the purpose of sizing the space-conditioning (HVAC) system, the indoor design temperatures shall be 68°F for heating and 75°F for cooling.
Outdoor design conditions shall be selected from Reference Joint Appendix JA2, which is based on data from the ASHRAE Climatic Data for Region X.
The outdoor design temperatures for heating shall be no lower than the Heating Winter Median of Extremes values.

The outdoor design temperatures for cooling shall be no greater than the 1.0 percent Cooling Dry Bulb and Mean Coincident Wet Bulb values.
Outdoor condensing units.
Clearances. Installed air conditioner and heat pump outdoor condensing units shall have a clearance of at least five feet (1.5 meters) from the outlet of any dryer vent.
Liquid line drier. Installed air conditioner and heat pump systems shall be equipped with liquid line filter driers if required, as specified by manufacturer’s instructions.
Central forced-air heating furnaces.
Temperature rise. Central forced-air heating furnace installations shall be configured to operate in conformance with the furnace manufacturer's maximum inlet-to-outlet temperature rise specifications.
Air-distribution and ventilation system ducts, plenums and fans.
CMC compliance.
All air-distribution system ducts and plenums, including, but not limited to, mechanical closets and air- handler boxes, shall meet the requirements of the CMC Sections 601.0, 602.0, 603.0, 604.0 and 605.0 and ANSI/SMACNA-006-2006 HVAC Duct Construction Standards Metal and Flexible 3rd Edition, incorporated herein by reference.
Portions of supply-air and return-air ducts and plenums of a space heating or cooling system shall be insulated in accordance with either Subsection a or b below:

Ducts shall have a minimum installed level of R-6.0, or
Exception to Section 160.3(b)5Aiia: Portions of the duct system located in conditioned space below the ceiling separating the occupiable space from the attic are not required to be insulated if all of the following conditions are met:
The noninsulated portion of the duct system is located entirely inside the building’s thermal envelope as confirmed by visual inspection.
At all locations where noninsulated portions of the duct system penetrate into unconditioned space, the penetration shall be draft stopped compliant with CFC Sections 703.1 and 704.1 and air-sealed to the construction materials that are penetrated, using materials compliant with CMC Section E502.4.2 to prevent air infiltration into the cavity. All connections in unconditioned space are insulated to a minimum of R-6.0 as confirmed by visual inspection.
Ducts do not require insulation when the duct system is located entirely in conditioned space. For buildings with three or fewer habitable stories, duct systems located entirely in conditioned space shall be confirmed through field verification and diagnostic testing in accordance with the requirements of Reference Residential Appendix RA3.1.4.3.8.
Connections of metal ducts and the inner core of flexible ducts shall be mechanically fastened.
Openings shall be sealed with mastic, tape, or other duct-closure system that meets the applicable requirements of UL 181, UL 181A or UL 181B or aerosol sealant that meets the requirements of UL 723. If mastic or tape is used to seal openings greater than 1/4 inch, the combination of mastic and either mesh or tape shall be used.
Building cavities, support platforms for air handlers, and plenums designed or constructed with materials other than sealed sheet metal, duct board or flexible duct shall not be used for conveying conditioned air. Building cavities and support platforms may contain ducts. Ducts installed in cavities and support platforms shall not be compressed to cause reductions in the cross-sectional area of the ducts.
Exception to Section 160.3(b)5A: Ducts and fans integral to a wood heater or fireplace.

Factory-fabricated duct systems.
All factory-fabricated duct systems shall comply with UL 181 for ducts and closure systems, including collars, connections and splices, and be labeled as complying with UL 181. UL 181 testing may be performed by UL laboratories or a laboratory approved by the Executive Director.
All pressure-sensitive tapes, heat-activated tapes and mastics used in the manufacture of rigid fiberglass ducts shall comply with UL 181 and UL 181A.
All pressure-sensitive tapes and mastics used with flexible ducts shall comply with UL 181 and UL 181B.
Joints and seams of duct systems and their components shall not be sealed with cloth back rubber adhesive duct tapes unless such tape is used in combination with mastic and drawbands.
Field-fabricated duct systems.
Factory-made rigid fiberglass and flexible ducts for field-fabricated duct systems shall comply with UL 181. All pressure-sensitive tapes, mastics, aerosol sealants or other closure systems used for installing field-fabricated duct systems shall meet the applicable requirements of UL 181, UL 181A and UL 181B.
Mastic sealants and mesh.
Sealants shall comply with the applicable requirements of UL 181, UL 181A and UL 181B, and be nontoxic and water resistant.
Sealants for interior applications shall be tested in accordance with ASTM C731 and D2202, incorporated herein by reference.
Sealants for exterior applications shall be tested in accordance with ASTM C731, C732 and D2202, incorporated herein by reference.
Sealants and meshes shall be rated for exterior use.
Pressure-sensitive tape. Pressure-sensitive tapes shall comply with the applicable requirements of UL 181, UL 181A and UL 181B.
Joints and seams of duct systems and their components shall not be sealed with cloth back rubber adhesive duct tapes unless such tape is used in combination with mastic and drawbands.
Drawbands used with flexible duct.
Drawbands shall be either stainless-steel worm-drive hose clamps or UV-resistant nylon duct ties.
Drawbands shall have a minimum tensile strength rating of 150 pounds.
Drawbands shall be tightened as recommended by the manufacturer with an adjustable tensioning tool.
Aerosol-sealant closures.
Aerosol sealants shall meet the requirements of UL 723 and be applied according to manufacturer specifications.
Tapes or mastics used in combination with aerosol sealing shall meet the requirements of this section.
Duct insulation R-value ratings. All duct insulation product R-values shall be based on insulation only (excluding air films, vapor retarder or other duct components) and tested C-values at 75°F mean temperature at the installed thickness, in accordance with ASTM C518 or ASTM C177, incorporated herein by reference, and certified pursuant to Section 110.8.
Duct insulation thickness. The installed thickness of duct insulation used to determine its R-value shall be determined as follows:
For duct board, duct liner and factory-made rigid ducts not normally subjected to compression, the nominal insulation thickness shall be used.
For duct wrap, installed thickness shall be assumed to be 75 percent (25 percent compression) of nominal thickness.

For factory-made flexible air ducts, the installed thickness shall be determined by dividing the difference between the actual outside diameter and nominal inside diameter by two.
Duct labeling. Insulated flexible duct products installed to meet this requirement shall include labels, in maximum intervals of 3 feet, showing the thermal performance R-value for the duct insulation itself (excluding air films, vapor retarder or other duct components), based on the tests in Section 160.3(b)5D and the installed thickness determined by Section 160.3(b)5Eiii.
Backdraft dampers. All fan systems, regardless of volumetric capacity, that exchange air between the building conditioned space and the outside of the building shall be provided with backdraft or automatic dampers to prevent unintended air leakage through the fan system when the fan system is not operating.
Gravity ventilation dampers. All gravity ventilating systems that serve conditioned space shall be provided with either automatic or readily accessible, manually operated dampers in all openings to the outside except combustion inlet and outlet air openings and elevator shaft vents.
Protection of insulation. Insulation shall be protected from damage, including that due to sunlight, moisture, equipment maintenance and wind but not limited to the following: Insulation exposed to weather shall be suitable for outdoor service (e.g., protected by aluminum, sheet metal, painted canvas or plastic cover). Cellular foam insulation shall be protected as above or painted with a coating that is water retardant and provides shielding from solar radiation that can cause degradation of the material.
Porous inner core flex duct. Flexible ducts having porous inner cores shall have a nonporous layer or air barrier between the inner core and the outer vapor barrier.
Duct system sealing and leakage testing. When space-conditioning systems utilize forced air duct systems to supply conditioned air to an individual dwelling unit, the ducts shall be sealed, as confirmed through field verification and diagnostic testing, in accordance with all applicable procedures specified in Reference Residential Appendix RA3.1. Air handler airflow for calculation of duct leakage rate compliance targets shall be determined according to methods specified in Reference Residential Appendix RA3.1.4.2.
For multifamily dwellings with the air-handling unit installed and the ducts connected directly to the air handler, regardless of duct system location:
The total leakage of the duct system shall not exceed 12 percent of the air handler airflow as determined utilizing the procedures in Reference Residential Appendix Section RA3.1.4.3.1; or
The duct system leakage to outside shall not exceed 6 percent of the air handler airflow as determined utilizing the procedures in Reference Residential Appendix Section RA3.1.4.3.4.
Exception 1 to Section 160.3(b)5K: The HERS Rater field verification and HERS Provider data registry requirements of Reference Residential Appendix RA2 and RA3 are not required for multifamily dwelling units in buildings four habitable stories and greater. The installer shall certify that diagnostic testing was performed in accordance with the applicable procedures.
Exception 2 to Section 160.3(b)5K: Multifamily dwelling units in buildings four habitable stories and greater in Climate Zones 1, 3, 5 and 7.
System airflow rate and fan efficacy. Space-conditioning systems that utilize forced air ducts to supply cooling to an individual dwelling unit shall:
Static pressure probe. Have a hole for the placement of a static pressure probe (HSPP), or a permanently installed static pressure probe (PSPP) in the supply plenum downstream of the air conditioning evaporator coil. The size, location and labeling of the HSPP or PSPP shall conform to the requirements specified in Reference Residential Appendix RA3.3.1.1 as confirmed by field verification and diagnostic testing; and
Exception to Section 160.3(b)5Li: Systems that cannot conform to the specifications for hole location in Reference Residential Appendix Figure RA3.3-1 shall not be required to provide holes as described in Figure RA3.3-1.

Single zone central forced air systems. Demonstrate, in every control mode, airflow greater than or equal to 350 cfm per ton of nominal cooling capacity through the return grilles, and an air-handling unit fan efficacy less than or equal to the maximum W/cfm specified in Subsection a or b below. The airflow rate and fan efficacy requirements in this section shall be confirmed by field verification and diagnostic testing in accordance with the procedures given in Reference Residential Appendix RA3.3.
0.45 W/cfm for gas furnace air-handling units.
0.58 W/cfm for air-handling units that are not gas furnaces.

Exception 1 to Section 160.3(b)5Lii: Standard ducted systems without zoning dampers may comply by meeting the applicable requirements in Table 160.3-A or 160.3-B as confirmed by field verification and diagnostic testing in accordance with the procedures in Reference Residential Appendix Sections RA3.1.4.4 and RA3.1.4.5. The design clean-filter pressure drop requirements specified by Section 160.2(b)1Div for the system air filter(s) shall conform to the requirements given in Table 160.3-A or 160.3-B.
Exception 2 to Section 160.3(b)5Lii: Multispeed compressor systems or variable speed compressor systems shall verify airflow (cfm/ton) and fan efficacy (watt/cfm) for system operation at the maximum compressor speed and the maximum air handler fan speed.
Exception 3 to Section 160.3(b)5Lii: Gas furnace air-handling units manufactured prior to July 3, 2019 shall comply with a fan efficacy value less than or equal to 0.58 w/cfm as confirmed by field verification and diagnostic testing in accordance with the procedures given in Reference Residential Appendix RA3.3.
Zonally controlled central forced air systems. Zonally controlled central forced air cooling systems shall be capable of simultaneously delivering, in every zonal control mode, an airflow from the dwelling, through the air handler fan and delivered to the dwelling, of greater than or equal to 350 cfm per ton of nominal cooling capacity, and operating at an air-handling unit fan efficacy of less than or equal to the maximum W/cfm specified in Subsection a or b below. The airflow rate and fan efficacy requirements in this section shall be confirmed by field verification and diagnostic testing in accordance with the applicable procedures specified in Reference Residential Appendix RA3.3.
0.45 W/cfm for gas furnace air-handling units.
0.58 W/cfm for air-handling units that are not gas furnaces.
Exception 1 to Section 160.3(b)5Liii: Multispeed or variable speed compressor systems, or single speed compressor systems that utilize the performance compliance approach, shall demonstrate compliance with the airflow (cfm/ton) and fan efficacy (watt/cfm) requirements of Section 160.3(b)5Liii by operating the system at maximum compressor capacity and system fan speed with all zones calling for conditioning, rather than in every zonal control mode.

Exception 2 to Section 160.3(b)5Liii: Gas furnace air-handling units manufactured prior to July 3, 2019 shall comply with a fan efficacy value less than or equal to 0.58 w/cfm as confirmed by field verification and diagnostic testing in accordance with the procedures given in Reference Residential Appendix RA3.3.
Small duct high velocity forced air systems. Demonstrate, in every control mode, airflow greater than or equal to 250 cfm per ton of nominal cooling capacity through the return grilles, and an air-handling unit fan efficacy less than or equal to 0.62 W/cfm as confirmed by field verification and diagnostic testing in accordance with the procedures given in Reference Residential Appendix RA3.3.
Exception 1 to Section 160.3(b)5Liv: Standard ducted systems without zoning dampers may comply by meeting the applicable requirements in Table 160.3-A or 160.3-B as confirmed by field verification and diagnostic testing in accordance with the procedures in Reference Residential Appendix Sections RA3.1.4.4 and RA3.1.4.5. The design clean-filter pressure drop requirements specified by Section

160.2(b)1Div for the system air filter(s) shall conform to the requirements given in Table 160.3-A or 160.3-B.
Exception 2 to Section 160.3(b)5Liv: Multispeed compressor systems or variable speed compressor systems shall verify airflow (cfm/ton) and fan efficacy (watt/cfm) for system operation at the maximum compressor speed and the maximum air handler fan speed.
Exception 1 to Section 160.3(b)5L: The HERS Rater field verification and HERS Provider data registry requirements of Reference Residential Appendix RA2 and RA3 are not required for multifamily dwelling units in buildings four habitable stories and greater. The installer shall certify that diagnostic testing was performed in accordance with the applicable procedures.
Exception 2 to Section 160.3(b)5L: Multifamily dwelling units in buildings four habitable stories and greater in Climate Zone 1.
Piping for space-conditioning systems, solar water-heating system collector loop, and distribution piping for steam and hydronic heating system shall meet the requirements of Section 160.3(c)1.
Fluid distribution systems; common area space-conditioning systems. Multifamily buildings shall comply with the applicable requirements of Section 160.3(a)1. Multifamily common areas shall comply with the applicable requirements of Sections 160.3(a)2A through 160.3(a)2J.
Pipe insulation. Multifamily buildings shall comply with the applicable requirements of Sections 160.3(c)1A through 160.3(c)1D.
General requirements. The piping conditions listed below for space-conditioning systems with fluid normal operating temperatures listed in Table 160.3-D shall have at least the amount of insulation specified in Section 160.3(c)1D:
Space cooling systems. All refrigerant suction, chilled water and brine fluid distribution systems.
Space heating systems. All refrigerant, steam, steam condensate and hot water fluid distribution systems.
Exception to Section 160.3(c)1Aii: Heat pumps refrigerant vapor line shall be installed with a minimum of
0.75 inch thick or R-6.0 insulation. No insulation is required on the refrigerant liquid line.
Insulation conductivity shall be determined in accordance with ASTM C335 at the mean temperature listed in Table 160.3-D, and shall be rounded to the nearest 1/100 Btu-inch per hour per square foot per °F. Fluid distribution systems include all elements that are in series with the fluid flow, such as pipes, pumps, valves, strainers, coil u-bends and air separators, but not including elements that are not in series with the fluid flow, such as expansion tanks, fill lines, chemical feeders and drains.
Insulation protection. Pipe insulation shall be protected from damage due to sunlight, moisture, equipment maintenance and wind. Protection shall, at minimum, include the following:
Pipe insulation exposed to weather shall be protected by a cover suitable for outdoor service. The cover shall be water retardant and provide shielding from solar radiation that can cause degradation of the material. Adhesive tape shall not be used to provide this protection.
Pipe insulation covering chilled water piping and refrigerant suction piping located outside the conditioned space shall include, or be protected by, a Class I or Class II vapor retarder. All penetrations and joints shall be sealed.
Pipe insulation buried below grade must be installed in a waterproof and noncrushable casing or sleeve.
Insulation thickness.
For insulation with a conductivity in the range shown in Table 160.3-D for the applicable fluid temperature range, the insulation shall have the applicable minimum thickness or R-value shown in Table 160.3-D.

For insulation with a conductivity outside the range shown in Table 160.3-D for the applicable fluid temperature range, the insulation shall have a minimum R-value shown in Table 160.3-D or thickness as calculated with Equation 160.3-A:


T  PR 1 

K
t  k


 1







	PR 	
	

(Equation 160.3-A)

WHERE:
T	=	Minimum insulation thickness for material with conductivity K, inches. PR	=	Pipe actual outside radius, inches.
t	=	Insulation thickness from TABLE 160.3-D, inches.
K	=	Conductivity of alternate material at the mean rating temperature indicated in TABLE 160.3-D for the applicable fluid temperature range, in Btu-inch per hour per square foot per °F.
k	=	The lower value of the conductivity range listed in TABLE 160.3-D for the applicable fluid temperature range, Btu-inch per hour per square foot per °F.
Exception 1 to Section 160.3(c)1: Factory-installed piping within space-conditioning equipment certified under Section 110.1 or 110.2.
Exception 2 to Section 160.3(c)1: Piping that conveys fluids with a design operating temperature range between 60°F and 105°F.
Exception 3 to Section 160.3(c)1: Where the heat gain or heat loss to or from piping without insulation will not increase building source energy use.
Exception 4 to Section 160.3(c)1: Piping that penetrates framing members shall not be required to have pipe insulation for the distance of the framing penetration. Metal piping that penetrates metal framing shall use grommets, plugs, wrapping or other insulating material to ensure that no contact is made with the metal framing.
Requirements for air distribution system, ducts and plenum. Multifamily common areas shall comply with the applicable requirements of Sections 160.3(c)2A through 160.3(c)2F.
CMC compliance. All air distribution system ducts and plenums, including, but not limited to, building cavities, mechanical closets, air-handler boxes and support platforms used as ducts or plenums shall meet the requirements of CMC Sections 601.0, 602.0, 603.0, 604.0 and 605.0, and ANSI/SMACNA-006-2006 HVAC Duct Construction Standards Metal and Flexible 3rd Edition, incorporated herein by reference. Connections of metal ducts and the inner core of flexible ducts shall be mechanically fastened. Openings shall be sealed with mastic, tape, aerosol sealant or other duct-closure system that meets the applicable requirements of UL 181, UL 181A or UL 181B. If mastic or tape is used to seal openings greater than 1/4 inch, the combination of mastic and either mesh or tape shall be used.
Portions of supply-air and return-air ducts conveying heated or cooled air located in one or more of the following spaces shall be insulated to a minimum installed level of R-8:
Outdoors; or
In a space between the roof and an insulated ceiling; or
In a space directly under a roof with fixed vents or openings to the outside or unconditioned spaces; or
In an unconditioned crawl space; or

In other unconditioned spaces.
Portions of supply-air ducts that are not in one of these spaces, including ducts buried in concrete slab, shall be insulated to a minimum installed level of R-4.2 or be enclosed in directly conditioned space.
Duct and plenum materials.
Factory-fabricated duct systems.
All factory-fabricated duct systems shall comply with UL 181 for ducts and closure systems, including collars, connections and splices, and be labeled as complying with UL 181. UL 181 testing may be performed by UL laboratories or a laboratory approved by the Executive Director.
All pressure-sensitive tapes, heat-activated tapes and mastics used in the manufacture of rigid fiberglass ducts shall comply with UL 181 and UL 181A.
All pressure-sensitive tapes and mastics used with flexible ducts shall comply with UL 181 and UL 181B.
Ductwork and plenums with pressure class ratings shall be constructed to Seal Class A. Joints and seams of duct systems and their components shall not be sealed with cloth back rubber adhesive duct tapes unless such tape is used in combination with mastic and drawbands.
Exception to Section 160.3(c)2Cid: Ductwork located in occupied space and exposed to view.
Field-fabricated duct systems.
Factory-made rigid fiberglass and flexible ducts for field-fabricated duct systems shall comply with UL
181. All pressure-sensitive tapes, mastics, aerosol sealants or other closure systems used for installing field-fabricated duct systems shall meet the applicable requirements of UL 181, UL 181A and UL 181B.
Mastic sealants and mesh.
Sealants shall comply with the applicable requirements of UL 181, UL 181A and UL 181B, and be nontoxic and water resistant.
Sealants for interior applications shall pass ASTM C731 (extrudability after aging) and D2202 (slump test on vertical surfaces), incorporated herein by reference.
Sealants for exterior applications shall pass ASTM C731, C732 (artificial weathering test) and D2202, incorporated herein by reference.
Sealants and meshes shall be rated for exterior use.
Pressure-sensitive tape. Pressure-sensitive tapes shall comply with the applicable requirements of UL 181, UL 181A and UL 181B.
Ductwork and plenums with pressure class ratings shall be constructed to Seal Class A. Joints and seams of duct systems and their components shall not be sealed with cloth back rubber adhesive duct tapes unless such tape is used in combination with mastic and drawbands.
Drawbands used with flexible duct.
Drawbands shall be either stainless-steel worm-drive hose clamps or UV-resistant nylon duct ties.
Drawbands shall have a minimum tensile strength rating of 150 pounds.
Drawbands shall be tightened as recommended by the manufacturer with an adjustable tensioning tool.
Aerosol-sealant closures.
Aerosol sealants shall meet the requirements of UL 723 and be applied according to manufacturer specifications.

Tapes or mastics used in combination with aerosol sealing shall meet the requirements of this section.
All duct insulation product R-values shall be based on insulation only (excluding air films, vapor retarders or other duct components) and tested C-values at 75°F mean temperature at the installed thickness, in accordance with ASTM C518 or ASTM C177, incorporated herein by reference, and certified pursuant to Section 110.8.
The installed thickness of duct insulation used to determine its R-value shall be determined as follows:
For duct board, duct liner and factory-made rigid ducts not normally subjected to compression, the nominal insulation thickness shall be used.
For duct wrap, installed thickness shall be assumed to be 75 percent (25 percent compression) of nominal thickness.
For factory-made flexible air ducts, the installed thickness shall be determined by dividing the difference between the actual outside diameter and nominal inside diameter by two.
Insulated flexible duct products installed to meet this requirement must include labels, in maximum intervals of 3 feet, showing the thermal performance R-value for the duct insulation itself (excluding air films, vapor retarder or other duct components), based on the tests in Section 160.3(c)2D and the installed thickness determined by Section 160.3(c)2Eiii.
Insulation shall be protected from damage, including that due to sunlight, moisture, equipment maintenance and wind but not limited to the following: Insulation exposed to weather shall be suitable for outdoor service; e.g., protected by aluminum, sheet metal, painted canvas or plastic cover. Cellular foam insulation shall be protected as above or painted with a coating that is water retardant and provides shielding from solar radiation that can cause degradation of the material.
Duct systems shall be tested in accordance with i or ii below:
New duct systems that meet the criteria in Subsections a, b and c below or ductwork that is part of a system that meets the criteria of Section 180.2(b)2B shall be sealed to a leakage rate not to exceed 6 percent of the nominal air handler airflow rate as confirmed through field verification and diagnostic testing, in accordance with the applicable procedures in Reference Nonresidential Appendices NA1 and NA2.
The duct system provides conditioned air to an occupiable space for a constant volume, single zone, space-conditioning system; and
The space-conditioning system serves less than 5,000 square feet of conditioned floor area; and
The combined surface area of the ducts located in the following spaces is more than 25 percent of the total surface area of the entire duct system:
Outdoors; or
In a space directly under a roof that has a U-factor greater than the U-factor of the ceiling, or if the roof does not meet the requirements of Section 170.2(a)1; or
In a space directly under a roof that has fixed vents or openings to the outside or unconditioned spaces; or
In an unconditioned crawl space; or
In other unconditioned spaces.
All duct systems that do not meet the criteria in Section 160.3(c)2H shall meet the duct leakage testing requirements of CMC Section 603.9.2.
Mechanical acceptance testing.

Common areas. Before an occupancy permit is granted, the following systems and equipment serving multifamily common areas shall be certified as meeting the Acceptance Requirements for Code Compliance, as specified by Reference Nonresidential Appendix NA7. These systems and equipment shall also comply with the applicable requirements of Section 160.3(d)3. A Certificate of Acceptance shall be submitted to the enforcement agency that certifies that the equipment and systems meet the acceptance requirements:
Outdoor air ventilation systems shall be tested in accordance with NA7.5.1.
Constant volume, single zone air conditioning and heat pump unit controls shall be tested in accordance with NA7.5.2.
Duct systems shall be tested in accordance with NA7.5.3 where either:
They are new duct systems; or
They are part of an altered system.
Air economizers shall be tested in accordance with NA7.5.4.
Exception to Section 160.3(d)1D: Air economizers installed by the HVAC system manufacturer and certified to the Commission as being factory calibrated and tested are exempt from the Functional Testing section of the Air Economizer Controls acceptance test as described in NA7.5.4.2.
Demand control ventilation systems required by Section 160.2(c)3 shall be tested in accordance with NA7.5.5.
Supply fan variable flow controls shall be tested in accordance with NA7.5.6.
Hydronic system variable flow controls shall be tested in accordance with NA7.5.7 and NA7.5.9.
Boilers or chillers that require isolation controls as specified by Section 170.2(c)4Iii or 170.2(c)4Iiii shall be tested in accordance with NA7.5.7.
Hydronic systems with supply water temperature reset controls shall be tested in accordance with NA7.5.8.
Automatic demand shed controls shall be tested in accordance with NA7.5.10.
Fault detection and diagnostics (FDD) for packaged direct expansion units shall be tested in accordance with NA7.5.11.
Automatic fault detection and diagnostics (FDD) for air handling units and zone terminal units shall be tested in accordance with NA7.5.12.
Distributed energy storage DX AC systems shall be tested in accordance with NA7.5.13.
Thermal energy storage (TES) systems shall be tested in accordance with NA7.5.14.
Supply air temperature reset controls shall be tested in accordance with NA7.5.15.
Water-cooled chillers served by cooling towers with condenser water reset controls shall be tested in accordance with NA7.5.16.
When an energy management control system is installed, it shall functionally meet all of the applicable requirements of Part 6.
Occupant sensing zone controls shall be tested in accordance with NA7.5.17.
Multifamily dwelling units. Before an occupancy permit is granted, the following systems and equipment serving multifamily dwelling units shall be certified as meeting the acceptance requirements for code compliance, as specified by the Reference Nonresidential Appendix NA7. These systems and equipment shall also comply with the applicable requirements of Section 160.3(d)3. A Certificate of Acceptance shall be submitted to the enforcement agency that certifies that the equipment and systems meet the acceptance requirements:
In multifamily buildings with four or more habitable stories, dwelling unit ventilation systems shall be tested in accordance with NA7.18.1.

In multifamily buildings with four or more habitable stories, dwelling unit enclosure leakage shall be tested in accordance with NA7.18.2 when exhaust or supply ventilation systems are used for compliance with whole- dwelling unit ventilation requirements as specified in Section 160.2(b)2Aivb2.
Multifamily building central ventilation ducts in multifamily buildings with four or more habitable stories shall be leak tested in accordance with NA7.18.3.
Multifamily building central ventilation system heat recovery or energy recovery systems in multifamily buildings with four or more habitable stories shall be tested in accordance with NA7.18.4.
When certification is required by Title 24, Part 1, Section 10-103.2, the acceptance testing specified by Section 160.3(d)1 and 2 shall be performed by a Certified Mechanical Acceptance Test Technician (CMATT). If the CMATT is operating as an employee, the CMATT shall be employed by a Certified Mechanical Acceptance Test Employer. The CMATT shall disclose on the Certificate of Acceptance a valid CMATT certification identification number issued by an approved Acceptance Test Technician Certification Provider. The CMATT shall complete all Certificate of Acceptance documentation in accordance with the applicable requirements in Section 10-103(a)4.
TABLE 160.3-A: Return Duct Sizing for Single Return Duct Systems
Return duct length shall not exceed 30 feet and shall contain no more than 180 degrees of bend. If the total bending exceeds 90 degrees, one bend shall be a metal elbow.
Return grille devices shall be labeled in accordance with the requirements in Section 160.2(b)1Biv to disclose the grille's design airflow rate and a maximum allowable clean-filter pressure drop of 25 Pa (0.1 inches water) for the air filter when tested using ASHRAE Standard 52.2, or as rated in accordance with AHRI Standard 680 for the design airflow rate for the return grille.	
System Nominal Cooling Capacity (Ton)*	Return Duct Minimum Nominal Diameter (inch)	Minimum Total Return Filter Grille Nominal Area
(inch2)	
1.5	16	500	
2.0	18	600	
2.5	20	800	
*Not applicable to systems with nominal cooling capacity greater than 2.5 tons or less than 1.5 ton	

TABLE 160.3-B: Return Duct Sizing for Multiple Return Duct Systems
Each return duct length shall not exceed 30 feet and shall contain no more than 180 degrees of bend. If the total bending exceeds 90 degrees, one bend shall be a metal elbow.
Return grille devices shall be labeled in accordance with the requirements in Section 160.2(b)1Biv to disclose the grille's design airflow rate and a maximum allowable clean-filter pressure drop of 25 Pa (0.1 inches water) for the air filter when tested using ASHRAE Standard 52.2, or as rated in accordance with AHRI Standard 680 for the design airflow rate for the return grille.	
System Nominal Cooling Capacity (Ton)*	Return Duct 1 Minimum Nominal Diameter (inch)	Return Duct 2 Minimum Nominal Diameter (inch)	Minimum Total Return Filter Grille Nominal Area
(inch2)	
1.5	12	10	500	
2.0	14	12	600	
2.5	14	14	800	
3.0	16	14	900	
3.5	16	16	1000	
4.0	18	18	1200	
5.0	20	20	1500	
*Not applicable to systems with nominal cooling capacity greater than 5.0 tons or less than 1.5 tons.	
TABLE 160.3-C DDC Applications and Qualifications
Building Status	Applications	Qualifications	
Newly Constructed Buildings	Air handling system and all
zones served by the system	Individual systems supplying more than three zones and with
design heating or cooling capacity of 300 kBtu/h and larger	
Newly Constructed Buildings	Chilled water plant and all coils and terminal units served by the
system	Individual plants supplying more than three zones and with design cooling capacity of 300 kBtu/h (87.9 kW) and larger	
Newly Constructed Buildings	Hot water plant and all coils and terminal units served by the
system	Individual plants supplying more than three zones and with design heating capacity of 300 kBtu/h (87.9 kW) and larger	
Additions or Alterations	Zone terminal unit such as VAV
box	Where existing zones served by the same air handling, chilled
water, or hot water systems that have DDC	
Additions or Alterations	Air handling system or fan coil	Where existing air handling system(s) and fan coil(s) served by the same chilled or hot water plant have DDC	
Additions or Alterations	New air handling system and all new zones served by the system	Individual systems with design heating or cooling capacity of 300 kBtu/h and larger and supplying more than three zones
and more than 75 percent of zones are new	
Additions or Alterations	New or upgraded chilled water plant	Where all chillers are new and plant design cooling capacity is 300 kBtu/h (87.9 kW) and larger	
Additions or Alterations	New or upgraded hot water
plant	Where all boilers are new and plant design heating capacity is
300 kBtu/h (87.9 kW) and larger	

TABLE 160.3-D PIPE INSULATION THICKNESS
Fluid Operating Temperature Range
(°F)	Insulation Conductivity		Nominal Pipe Diameter (in inches)	
	Conductivity (in Btu·in/h·ft2·°F)	Mean Rating Temperature (°F)			
				< 1	1 to <1.5	1.5 to < 4	4 to < 8	8 and larger	
Space heating (Steam, Steam Condensate, Refrigerant, Space Heating)	Minimum Pipe Insulation Required (Thickness in inches or R-value)	
Above 350	0.32-0.34	250	Inches	4.5	5.0	5.0	5.0	5.0	
			R-value	R 37	R 41	R 37	R 27	R 23	
251-350	0.29-0.32	200	Inches	3.0	4.0	4.5	4.5	4.5	
			R-value	R 24	R 34	R 35	R 26	R 22	
201-250	0.27-0.30	150	Inches	2.5	2.5	2.5	3.0	3.0	
			R-value	R 21	R 20	R 17.5	R 17	R 14.5	
141-200	0.25-0.29	125	Inches	1.5	1.5	2.0	2.0	2.0	
			R-value	R 11.5	R 11	R 14	R 11	R 10	
105-140	0.22-0.28	100	Inches	1.0	1.5	1.5	1.5	1.5	
			R-value	R 7.7	R 12.5	R 11	R 9	R 8	
Fluid Operating Temperature Range
(°F)	Insulation Conductivity		Nominal Pipe Diameter (in inches)	
	Conductivity (in Btu·in/h·ft2·°F)	Mean Rating Temperature
(°F)		< 1	1 to <1.5	1.5 to < 4	4 to < 8	8 and larger	
Space cooling systems (chilled water, refrigerant and brine)	Minimum Pipe Insulation Required (Thickness in inches or R-value)1	
40-60	0.21-0.27	75	Inches	0.75	0.75	1.0	1.0	1.0	
			R-value	R 6	R 5	R 7	R 6	R 5	
Below 40	0.20-0.26	50	Inches	1.0	1.5	1.5	1.5	1.5	
			R-value	R 8.5	R 14	R 12	R 10	R 9	
Footnote to TABLE 160.3-D:
These thicknesses are based on energy efficiency considerations only. Issues such as water vapor permeability or surface condensation sometimes require vapor retarders or additional insulation.
NOTE: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference:
Sections 25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and 25943, Public
Resources Code.

SECTION 160.4 – MANDATORY REQUIREMENTS FOR WATER HEATING SYSTEMS
Systems using gas or propane water heaters to serve individual dwelling units shall include the following components:
A dedicated 125 volt, 20 amp electrical receptacle that is connected to the electric panel with a 120/240 volt 3 conductor, 10 AWG copper branch circuit, within 3 feet from the water heater and accessible to the water heater with no obstructions. In addition, all of the following:
Both ends of the unused conductor shall be labeled with the word “spare” and be electrically isolated; and
A reserved single pole circuit breaker space in the electrical panel adjacent to the circuit breaker for the branch circuit in A above and labeled with the words “Future 240V Use”; and
A Category III or IV vent, or a Type B vent with straight pipe between the outside termination and the space where the water heater is installed; and
A condensate drain that is no more than 2 inches higher than the base of the installed water heater, and allows natural draining without pump assistance; and
A gas supply line with a capacity of at least 200,000 Btu/hr.
Water-heating recirculation loops serving multiple dwelling units shall meet the requirements of Section 110.3(c)4.
Solar water-heating systems and collectors shall be certified and rated by the Solar Rating and Certification Corporation (SRCC), the International Association of Plumbing and Mechanical Officials, Research and Testing (IAPMO R&T), or a listing agency that is approved by the Executive Director.
Instantaneous water heaters with an input rating greater than 6.8 kBTU/hr (2kW) shall meet the requirements of Section 110.3(c)6.
Commercial boilers
Combustion air positive shut-off shall be provided on all newly installed boilers as follows:
All boilers with an input capacity of 2.5 MMBtu/h (2,500,000 Btu/h) and above, in which the boiler is designed to operate with a nonpositive vent static pressure.
All boilers where one stack serves two or more boilers with a total combined input capacity per stack of 2.5 MMBtu/h (2,500,000 Btu/h).
Boiler combustion air fans with motors 10 horsepower or larger shall meet one of the following for newly installed boilers:
The fan motor shall be driven by a variable speed drive, or
The fan motor shall include controls that limit the fan motor demand to no more than 30 percent of the total design wattage at 50 percent of design air volume.
Newly installed boilers with an input capacity 5 MMBtu/h (5,000,000 Btu/h) and greater shall maintain excess (stack-gas) oxygen concentrations at less than or equal to 5.0 percent by volume on a dry basis over firing rates of 20 percent to 100 percent. Combustion air volume shall be controlled with respect to firing rate or flue gas oxygen concentration. Use of a common gas and combustion air control linkage or jack shaft is prohibited.
Exception to Section 160.4(e)3: Boilers with steady state full-load thermal combustion efficiency 90 percent or higher.
Insulation for piping and tanks
Piping for multifamily domestic hot water systems shall be insulated to meet the requirements of Table 160.4-A.
Exception 1 to Section 160.4(f)1: Factory-installed piping within space-conditioning equipment certified under Section 110.1 or 110.2.

Exception 2 to Section 160.4(f)1: Piping that penetrates framing members shall not be required to have pipe insulation for the distance of the framing penetration. Piping that penetrates metal framing shall use grommets, plugs, wrapping or other insulating material to ensure that no contact is made with the metal framing. Insulation shall abut securely against all framing members.
Exception 3 to Section 160.4(f)1: Piping installed in interior or exterior walls shall not be required to have pipe insulation if all of the requirements are met for compliance with quality insulation installation (QII) as specified in Reference Residential Appendix RA3.5.
Exception 4 to Section 160.4(f)1: Piping surrounded with a minimum of 1 inch of wall insulation, 2 inches of crawl space insulation or 4 inches of attic insulation shall not be required to have pipe insulation.
TABLE 160.4-A PIPE INSULATION THICKNESS – Multifamily Domestic Hot Water
Fluid Operating Temperature Range
(°F)	Insulation Conductivity		Nominal Pipe Diameter (in inches)	
	Conductivity (in Btu·in/h·ft2· °F)	Mean Rating Temperature (°F)			
				< 1	1 to <1.5	1.5 to < 4	4 to < 8	8 and larger	
Multifamily Domestic Hot Water Systems		Minimum Pipe Insulation Required (Thickness in inches or R-value)	
105-1401	0.22-0.28	100	Inches	1.0	1.5	2.0	2.0	2.0	
			R-value	R 7.7	R 12.5	R 16	R 12.5	R 11	
Footnote to TABLE 160.4-A:
1.	Multifamily and hotel/motel domestic hot water systems with water temperature above 140°F shall use the row in table 120.3-A for the applicable water temperature.
Insulation Protection. Pipe Insulation shall be protected from damage due to sunlight, moisture, equipment maintenance and wind. Protection shall, at minimum, include the following:
Pipe insulation exposed to weather shall be protected by a cover suitable for outdoor service. The cover shall be water retardant and provide shielding from solar radiation that can cause degradation of the material. Adhesive tape shall not be used to provide this protection.
Pipe insulation covering chilled water piping and refrigerant suction piping located outside the conditioned space shall include, or be protected by, a Class I or Class II vapor retarder. All penetrations and joints shall be sealed.
Pipe insulation buried below grade must be installed in a waterproof and noncrushable casing or sleeve.
NOTE: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference:
Sections 25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8 and 25943, Public
Resources Code.

SECTION 160.5 – MANDATORY LIGHTING REQUIREMENTS FOR INDOOR AND OUTDOOR SPACES
The design and installation of all lighting systems and equipment in multifamily buildings within the scope of Section 100.0(a) shall comply with the applicable provisions of Section 160.5. All functional areas except dwelling units and common living areas shall comply with the applicable requirements of Sections 160.5(b) through 160.5(e).
Dwelling unit lighting.
The design and installation of all lighting systems and equipment in multifamily dwelling units shall comply with Section 160.5(a). Multifamily dwelling units include dormitory and senior housing dwelling accommodations. Outdoor lighting attached to multifamily buildings and controlled from the inside of a dwelling unit shall comply with the lighting requirements of Section 160.5(a).
Luminaire requirements.
Luminaire efficacy. All installed luminaires shall meet the requirements in Table 160.5-A.
Exception 1 to Section 160.5(a)1A: Integrated device lighting: Lighting integral to exhaust fans, kitchen range hoods, bath vanity mirrors and garage door openers, and nonremovable lighting attached to ceiling fans.
Exception 2 to Section 160.5(a)1A: Navigation lighting: Night lights, step lights, path lights less than 5 watts.
Exception 3 to Section 160.5(a)1A: Cabinet lighting: Lighting internal to drawers, cabinetry and linen closets with an efficacy of 45 lumens per watt or greater.
Screw based luminaires. Screw based luminaires shall contain lamps that comply with Reference Joint Appendix JA8.
Recessed downlight luminaires. In addition to complying with Section 160.5(a)1A, luminaires recessed into ceilings shall meet all of the following requirements:
Shall not contain screw base lamp sockets; and
Have a label that certifies the luminaire is airtight with air leakage less than 2.0 cfm at 75 Pascals when tested in accordance with ASTM E283. An exhaust fan housing with integral light shall not be required to be certified airtight; and
Be sealed with a gasket or caulk between the luminaire housing and ceiling, and have all air leak paths between conditioned and unconditioned spaces sealed with a gasket or caulk, or be installed per manufacturer’s instructions to maintain airtightness between the luminaire housing and ceiling; and
Meet the clearance and installation requirements of California Electrical Code Section 410.116 for recessed luminaires.

Exception to Section 160.5(a)1Cii and Iii: Recessed luminaires marked for use in fire-rated installations, and recessed luminaires installed in noninsulated ceilings.
Light sources in enclosed or recessed luminaires. Lamps and other separable light sources that are not compliant with the JA8 elevated temperature requirements, including marking requirements, shall not be installed in enclosed or recessed luminaires.
Blank electrical boxes. The number of electrical boxes that are more than 5 feet above the finished floor and do not contain a luminaire or other device shall be no greater than the number of bedrooms. These electrical boxes must be served by a dimmer, vacancy sensor control, low voltage wiring or fan speed control.
Indoor lighting controls.

Lighting shall have readily accessible wall-mounted controls that allow the lighting to be manually turned ON and OFF.
Exception to Section 160.5(a)2A: Ceiling fans may provide control of integrated lighting via a remote control.
No controls shall bypass a dimmer, occupant sensor or vacancy sensor function where that dimmer or sensor has been installed to comply with Section 160.5(a)2.
Lighting controls shall comply with the applicable requirements of Section 110.9.
An energy management control system (EMCS) or a multiscene programmable controller may be used to comply with dimming, occupancy and lighting control requirements in Section 160.5(a)2 if it provides the functionality of the specified controls in accordance with Section 110.9 and the physical controls specified in Section 160.5(a)2A.
Automatic off controls.
In bathrooms, garages, laundry rooms, utility rooms and walk-in closets, at least one installed luminaire shall be controlled by an occupancy or vacancy sensor providing automatic-off functionality.
For lighting internal to drawers and cabinetry with opaque fronts or doors, controls that turn the lighting off when the drawer or door is closed shall be provided.
Dimming controls. Lighting in habitable spaces, including but not limited to living rooms, dining rooms, kitchens and bedrooms, shall have readily accessible wall-mounted dimming controls that allow the lighting to be manually adjusted up and down. Forward phase cut dimmers controlling LED light sources shall comply with NEMA SSL 7A.
Exception 1 to Section 160.5(a)2F: Ceiling fans may provide control of integrated lighting via a remote control. Exception 2 to Section 160.5(a)2F: Luminaires controlled by an occupancy or vacancy sensor providing automatic-off functionality.
Exception 3 to Section 160.5(a)2F: Navigation lighting such as night lights, step lights and path lights less than 5 watts; and lighting internal to drawers and cabinetry with opaque fronts or doors, or with automatic off controls.
Independent controls. Integrated lighting of exhaust fans shall be controlled independently from the fans. The following shall be controlled separately from ceiling-installed lighting such that one can be turned on without turning on the other:
Undercabinet lighting
Undershelf lighting
Interior lighting of display cabinets
Switched outlets
Outdoor lighting controls. In addition to meeting the requirements of Section 160.5(a)1, luminaires providing residential outdoor lighting shall meet the following requirements, as applicable:
Outdoor lighting attached to a building and separately controlled from the inside of a dwelling unit shall meet the requirement in Item i and the requirements in either Item ii or Item iii:
Controlled by a manual ON and OFF control switch that permits the automatic actions of Item ii or iii below; and
Controlled by a photocell and either a motion sensor or an automatic time switch control; or
Controlled by an astronomical time clock control.
Controls that override to ON shall not be allowed unless the override automatically returns the automatic control to its normal operation within 6 hours. An energy management control system that provides the specified

lighting control functionality and complies with all requirements applicable to the specified controls may be used to meet these requirements.

TABLE 160.5-A	CLASSIFICATION OF DWELLING UNIT HIGH LUMINOUS EFFICACY LIGHT SOURCES
Light sources in this column other than those installed in ceiling recessed downlight luminaires are classified as high luminous efficacy and are not required to comply with Reference Joint
Appendix JA8	Light sources in this column are required to comply with Reference Joint Appendix JA8 and shall be certified and marked as required by JA8.	
LED light sources installed outdoors.
Inseparable Solid State Lighting (SSL) luminaires containing colored light sources that are installed to provide decorative lighting.
Pin-based linear fluorescent or compact fluorescent light sources using electronic ballasts.
High intensity discharge (HID) light sources including pulse start metal halide and high pressure sodium light sources.
Luminaires with hardwired high frequency generator and induction lamp.
Ceiling Fan Light Kits subject to federal appliance regulations.	All light sources installed in ceiling recessed downlight luminaires. Note that ceiling recessed downlight luminaires shall not have screw base sockets regardless of lamp type as specified in Section 150.0(k)1C.
Any light source not otherwise listed in this table.	

Common services area lighting. Lighting systems and equipment in multifamily common services areas shall comply with the applicable provisions of Sections 160.5(b)1 through 160.5(b)4.
Exception to Section 160.5(b): Lighting systems in common use areas providing shared provisions for living, eating, cooking or sanitation to dwelling units that would otherwise lack these provisions may instead comply with Section 160.5(a).
Note: The requirements of Section 160.5(b) apply to newly constructed buildings. Sections 180.1 and 180.2 specify which requirements of Sections 160.5(b)1 through 160.5(e) also apply to additions and alterations to existing buildings.
Luminaire classification and power. Luminaires shall be classified, and their wattage determined as follows:
Luminaire wattage shall be labeled as follows:
The maximum rated wattage or relamping rated wattage of a luminaire shall be listed on a permanent, preprinted, factory-installed label, as specified by UL 1574, 1598, 2108 or 8750, as applicable; and
The factory-installed maximum rated wattage or relamping rated wattage label shall not consist of peel- off or peel-down layers or other methods that allow the rated wattage to be changed after the luminaire has been shipped from the manufacturer.
Exception to Section 160.3(b)1Aii: Luminaires with a single lamp and an integrated ballast or transformer may use a peel-down label provided that they are layered such that the rated wattage reduces as successive layers are removed.
Low-voltage luminaires (except low voltage track systems), ≤ 24 volts, with a maximum relamping
rated wattage of 50 watts.

Compact fluorescent luminaires, having an integral electronic ballast, with a maximum relamping rated wattage of 42 watts.
High intensity discharge luminaires, having an integral electronic ballast, with a maximum relamping rated wattage of 150 watts.
For luminaires with line voltage lamps not served by drivers, ballasts or transformers, the wattage of such luminaires shall be determined as the maximum rated wattage as labeled in accordance with Section 160.5(b)1A.
For luminaires with permanently installed or remotely installed ballasts, the wattage of such luminaires shall be the operating input wattage of the rated lamp/ballast combination published in the ballast manufacturer’s catalogs based on independent testing lab reports as specified by UL 1598.
For inseparable SSL luminaires and SSL luminaires with remotely mounted drivers, the maximum rated wattage shall be the maximum rated input wattage of the SSL luminaire as specified in Section 160.5(b)1A when tested in accordance with UL 1598, 2108 or 8750, or IES LM-79.
For LED tape lighting and LED linear lighting with LED tape lighting components, the maximum rated wattage shall be the sum of the installed length of the tape lighting times its rated linear power density in watts per linear foot, or the maximum rated input wattage of the driver or power supply providing power to the lighting system, with tape lighting tested in accordance with UL 2108 or 8750, or IES LM-79.
For modular lighting systems that allow the addition or relocation of luminaires without altering the wiring of the system, wattage shall be determined as follows:
The wattage shall be the greater of:
30 watts per linear foot of track or plug-in busway; or
the rated wattage of all of the luminaires included in the system, where the luminaire wattage is determined as specified in Section 160.5(b)1A; or
For line-voltage lighting track and plug-in busway served by a track lighting integral current limiter or a dedicated track lighting supplementary overcurrent protection panel, the wattage shall be determined as follows:
The volt-ampere rating of current limiter as specified by UL 1077; or
The sum of the ampere (A) rating of all of the current protection devices times the branch circuit voltages for track lighting supplementary overcurrent protection panel.
For other modular lighting systems with power supplied by a driver, power supply or transformer, including but not limited to low-voltage lighting systems, the wattage of the system shall be the maximum rated input wattage of the driver, power supply or transformer published in the manufacturer’s catalogs, as specified by UL 2108 or 8750.
Exception to Section 160.5(b)1F: For power-over-Ethernet lighting systems, power provided to installed nonlighting devices may be subtracted from the total power rating of the power-over-Ethernet system.
For all other lighting equipment not addressed by Sections 160.5(b)1B through F, the wattage of the lighting equipment shall be the maximum rated wattage of the lighting equipment, or operating input wattage of the system, labeled in accordance with Section 160.5(b)1A, or published in manufacturer’s catalogs, based on independent testing lab reports as specified by UL 1574, 1598, 2108, 8750, or IES LM-79.
Lighting controls. All lighting controls and equipment shall comply with the applicable requirements in Sections 110.9, 160.5(b) and 160.5(c), and shall be installed in accordance with any applicable manufacturer instructions.
Energy Management Control System (EMCS). An EMCS may be installed to comply with the requirements of one or more lighting controls if it meets the following minimum requirements:
Provides all applicable functionality for each specific lighting control or system for which it is installed in accordance with Sections 110.9, 160.5(b) and 160.5(c); and

Complies with all applicable lighting control installation requirements in accordance with Section 160.5(e) for each specific lighting control or system for which it is installed; and
Complies with all applicable application requirements for each specific lighting control or system for which it is installed, in accordance with Part 6.
Mandatory indoor lighting controls. Multifamily common use areas shall comply with the applicable requirements of Sections 160.5(b)4A through 160.5(b)4F, in addition to the applicable requirements of Section 110.9.
Manual area controls. Each area enclosed by ceiling-height partitions shall provide lighting controls that allow the lighting in that area to be manually turned on and off. The manual control shall:
Be readily accessible; and
Exception to Section 160.5(b)4Ai: Restrooms having two or more stalls, parking areas, stairwells, corridors and areas of the building intended for access or use by the public may use a manual control not accessible to unauthorized personnel.
Be located in the same enclosed area with the lighting it controls; and
Exception to Section 160.5(b)4Aii: For areas where placement of a manual area control poses a health and safety hazard, the manual area control may instead be located so that a person using the control can see the lights or area controlled by that control, or visually signal or display showing the current state of the controlled lighting.
Provide separate control of general, floor display, wall display, window display, case display, ornamental, and special effects lighting, such that each type of lighting can be turned on or off without turning on or off other types of lighting. Scene controllers may comply with this requirement provided that at least one scene turns on general lighting only, and the control provides a means to manually turn off all lighting.
Exception to Section 160.5(b)4A: Up to 0.1 watts per square foot of indoor lighting may be continuously illuminated to allow for means of egress illumination consistent with California Building Code Section 1008. Egress lighting complying with this wattage limitation is not required to comply with manual area control requirements if:
The area is designated for means of egress on the plans and specifications submitted to the enforcement agency under Section 10-103(a)2 of Part 1; and
The controls for the egress lighting are not accessible to unauthorized personnel.
Multi-level lighting controls. The general lighting of any enclosed area 100 square feet or larger with a connected lighting load that exceeds 0.5 watts per square foot shall provide multi-level lighting controls that allow the level of lighting to be adjusted up and down. The multi-level controls shall:
Provide the number of control steps specified in Table 160.5-B; and
Meet the uniformity requirements specified in Table 160.5-B.

Exception 1 to Section 160.5(b)4B: An area enclosed by ceiling height partitions that has only one luminaire with no more than two lamps or has only one inseparable SSL luminaire.
Exception 2 to Section 160.5(b)4B: Restrooms.
Automatic shut-OFF controls. All installed indoor lighting shall be equipped with controls able to automatically reduce lighting power when the space is typically unoccupied.
In addition to lighting controls installed to comply with Sections 160.5(b)4A and B, all installed indoor lighting shall be equipped with controls that meet the following requirements:
Shall be controlled with an occupant sensing control, automatic time-switch control, or other control capable of automatically shutting OFF all of the lighting when the space is typically unoccupied; and
Separate controls for the lighting on each floor, other than lighting in stairwells; and

Separate controls for a space enclosed by ceiling height partitions not exceeding 5,000 square feet;
Exception 1 to Section 160.5(b)4Ci: Where the lighting is serving an area that is in continuous use, 24 hours per day/365 days per year.
Exception 2 to Section 160.5(b)4Ci: Lighting complying with Section 160.5(b)4Cv or vii.
Exception 3 to Section 160.5(b)4Ci: Up to 0.1 watts per square foot of lighting in any area within a building may be continuously illuminated, provided that the area is designated for means of egress on the plans and specifications submitted to the enforcement agency under Section 10-103(a)2 of Part 1.
Lighting providing means of egress illumination, as the term is used in the California Building Code, shall be configured to provide no less than the amount of light required by California Building Code Section 1008 while in the partial-off mode.
Exception 4 to Section 160.5(b)4Ci: Electrical equipment rooms subject to Article 110.26(D) of the California Electrical Code.
Exception 5 to Section 160.5(b)4Ci: Illumination provided by lighting equipment that is designated for emergency lighting, connected to an emergency power source or battery supply, and intended to function in emergency mode only when normal power is absent.
Countdown timer switches may be used to comply with the automatic shut-OFF control requirements in Section 160.5(b)4Ci only in closets less than 70 square feet. The maximum timer setting shall be 10 minutes for closets.
If an automatic time-switch control, other than an occupant sensing control, is installed to comply with Section 160.5(b)4Ci, it shall incorporate a manual override lighting control that:
Complies with 160.5(b)4A; and
Allows the lighting to remain ON for no more than 2 hours when an override is initiated.
If an automatic time-switch control, other than an occupant sensing control, is installed to comply with Section 160.5(b)4Ci, it shall incorporate an automatic holiday "shut-OFF" feature that turns OFF all loads for at least 24 hours, and then resumes the normally scheduled operation.
Occupant sensing controls are required for specified offices, multipurpose rooms, conference rooms and restrooms. In offices 250 square feet or smaller, multipurpose rooms of less than 1,000 square feet, conference rooms of any size and restrooms of any size, lighting shall be controlled with occupant sensing controls to automatically shut OFF all of the lighting in 20 minutes or less after the control zone is unoccupied.
In areas required by Section 160.5(b)4B to have multi-level lighting controls, the occupant sensing controls shall function either as:
a partial-ON occupant sensing control capable of automatically activating between 50 and 70 percent of controlled lighting power, or
a vacancy sensing control, where all lighting responds to a manual ON input only.
In areas not required by Section 160.5(b)4B to have multi-level lighting controls, the occupant sensing controls shall function either as:
an occupant sensing control; or
a partial-ON occupant sensing control, or
a vacancy sensing control, where all lighting responds to a manual ON input only.
In addition, controls shall be provided that allow the lights to be manually shut OFF in accordance with Section 160.5(b)4A regardless of the sensor status.

Full or partial OFF occupant sensing controls are required for corridors and stairwells, and offices greater than 250 square feet. Lighting installed in the following areas shall meet the requirements below in addition to complying with Section 160.5(b)4Ci.
In corridors and stairwells, lighting shall be controlled by occupant sensing controls that separately reduce the lighting power in each space by at least 50 percent when the space is unoccupied. The occupant sensing controls shall be capable of automatically turning the lighting fully ON only in the separately controlled space and shall be automatically activated from all designed paths of egress.
In office spaces greater than 250 square feet, general lighting shall be controlled by occupancy sensing controls that meet all of the following:
The occupancy sensing controls shall be configured so that lighting shall be controlled separately in control zones not greater than 600 square feet. For luminaires with an embedded occupancy sensor that are capable of reducing power independently from other luminaires, each luminaire can be considered its own control zone; and
In 20 minutes of or less after the control zone is unoccupied, the occupancy sensing controls shall uniformly reduce lighting power in the control zone to by at least 80 percent of full power. Control functions that switch control zone lights completely off when the zone is vacant meet this requirement; and
In 20 minutes or less after the entire office space is unoccupied, the occupancy sensing controls shall automatically turn off lighting in all control zones in the space; and
In each control zone, lighting shall be allowed to automatically turn on to any level up to full power upon occupancy within the control zone. When occupancy is detected in any control zone in the space, the lighting in other control zones that are unoccupied shall operate at no more than 20 percent of full power.
Exception to Section 160.5(b)4Cvi: Under-shelf or furniture-mounted task lighting controlled by a local switch and either a time switch or an occupancy sensor.
Partial OFF occupant sensing controls are required for parking garages, parking areas, and loading and unloading areas. Lighting installed in the following areas shall meet the requirements below instead of complying with Section 160.5(b)4Ci.
Reserved
In parking garages, parking areas, and loading and unloading areas, general lighting shall be controlled by occupant sensing controls having at least one control step between 20 percent and 50 percent of design lighting power. No more than 500 watts of rated lighting power shall be controlled together as a single zone. A reasonably uniform level of illuminance shall be achieved in accordance with the applicable requirements in Table 160.5-B. The occupant sensing controls shall be capable of automatically turning the lighting fully ON only in the separately controlled space, and shall be automatically activated from all designed paths of egress.
Interior areas of parking garages are classified as indoor lighting for compliance with Section 160.5(b)4Cviib. Parking areas on the roof of a parking structure are classified as outdoor hardscape and shall comply with the applicable provisions in Section 160.5(c).
Exception to Section 160.5(b)4Cviib: Metal halide luminaires with a lamp plus ballast mean system efficacy of greater than 75 lumens per watt, used for general lighting in parking garages, parking areas, and loading and unloading areas, shall be controlled by occupant sensing controls having at least one control step between 20 percent and 60 percent of design lighting power.
Automatic Daylighting Controls. The general lighting in skylit daylit zones, primary sidelit daylit zones, and secondary sidelit daylit zones, as well as the general lighting in the combined primary and secondary sidelit daylit zones in parking garages, shall be provided with controls that automatically adjust the power of the installed general lighting up and down to keep the total light level stable as the amount of incoming daylight

changes. For skylights located in an atrium, the skylit daylit zones shall apply to the floor area directly under the atrium and the top floor area directly adjacent to the atrium.
All skylit daylit zones, primary sidelit daylit zones, secondary sidelit daylit zones and the combined primary and secondary sidelit daylit zones in parking garages shall be shown on the plans.
Note: Parking areas on the roof of a parking structure are outdoor hardscape, not skylit daylit areas.
The automatic daylighting controls shall provide separate control for general lighting in each type of daylit zone. General lighting in overlapping skylit daylit zone and sidelit daylit zone shall be controlled as part of the skylit daylit zone. General lighting in overlapping primary and secondary sidelit daylit zone shall be controlled as part of the primary sidelit daylit zone. Linear LED luminaires and other solid state lighting (SSL) light sources in linear form may be treated as linear lamps in increments of 4 feet segment or smaller, and each segment is separately controlled based on the type of the daylit zone the segment is primarily located.
The automatic daylighting controls shall:
For spaces required to install multilevel controls under Section 160.5(b)4B, adjust lighting via continuous dimming or the number of control steps provided by the multilevel controls;
For each space, ensure the combined illuminance from the controlled lighting and daylight is not less than the illuminance from controlled lighting when no daylight is available;
For areas other than parking garages, ensure that when the daylight illuminance is greater than 150 percent of the illuminance provided by the controlled lighting system when no daylight is available, the controlled lighting power in that daylight zone shall be reduced by a minimum of 90 percent; and
For parking garages, ensure that when daylight illuminance levels measured at the farthest edge of the secondary sidelit zone away from the glazing or opening are greater than 150 percent of the illuminance provided by the controlled lighting when no daylight is available, the controlled lighting power in the combined primary and secondary sidelit daylight zones shall be reduced by 100 percent.
Photosensor shall be located so that they are not readily accessible to unauthorized personnel.
The location where calibration adjustments are made to the automatic daylighting controls shall be readily accessible to authorized personnel but may be inside a locked case or under a cover that requires a tool for access.
Exception 1 to Section 160.5(b)4D: Areas under skylights where it is documented that existing adjacent structures or natural objects block direct sunlight for more than 1,500 daytime hours per year between 8 a.m. and 4 p.m.
Exception 2 to Section 160.5(b)4D: Areas adjacent to vertical glazing below an overhang, where the overhang covers the entire width of the vertical glazing, no vertical glazing is above the overhang, and the ratio of the overhang projection to the overhang rise is greater than 1.5 for south, east and west orientations or greater than 1 for north orientations.
Exception 3 to Section 160.5(b)4D: Rooms where the combined total installed wattage of the general lighting in the skylit and primary sidelit zones is less than 120 watts are not required to have daylighting controls for those zones. Rooms where the total installed wattage of the general lighting in the secondary sidelit zones is less than 120 watts are not required to have daylighting controls for that zone.
Exception 4 to Section 160.5(b)4D: Parking garage areas where the total installed wattage of the general lighting in the primary and the secondary sidelit daylit zones is less than 60 watts do not require automatic daylighting controls in the daylit zones.
Exception 5 to Section 160.5(b)4D: Rooms that have a total glazing area of less than 24 square feet, or parking garage areas with a combined total of less than 36 square feet of glazing or opening.

Exception 6 to Section 160.5(b)4D: For parking garages, luminaires located in the daylight adaptation zone and luminaires for only dedicated ramps. Daylight adaptation zone and dedicated ramps are defined in Section 100.1.
Exception 7 to Section 160.5(b)4D: Luminaires in sidelit daylit zones in retail merchandise sales and wholesale showroom areas.
Demand Responsive Controls. See Section 110.12 for requirements for demand responsive lighting controls.
Control interactions. Each lighting control installed to comply with Section 160.5(b)4 shall permit or incorporate the functions of the other lighting controls required by this section.
For general lighting, the manual area control shall permit the level or amount of light provided while the lighting is on to be set or adjusted by the controls specified in Sections 160.5(b)4B, C, D, and E.
The manual area control shall permit the shutoff control to turn the lighting down or off.
The multi-level lighting control shall permit the automatic daylighting control to adjust the electric lighting level in response to changes in the amount of daylight in the daylit zone.
The multi-level lighting control shall permit the demand responsive control to adjust the lighting during a demand response event and to return it to the level set by the multilevel control after the event.
The shutoff control shall permit the manual area control to turn the lighting on. If the on request occurs while an automatic time switch control would turn the lighting off, then the on request shall be treated as an override request consistent with Section160.5(c)4Ciii.
The automatic daylighting control shall permit the multi-level lighting control to adjust the level of lighting.
For lighting controlled by multi-level lighting controls and by occupant sensing controls that provide an automatic-on function, the controls shall provide a partial-on function that is capable of automatically activating between 50 and 70 percent of controlled lighting power.
Reserved.
For space-conditioning system zones serving only spaces that are required to have occupancy sensing controls as specified in Sections 160.5(b)4Cv, vi and vii, and where Table 120.1-A allows the ventilation air to be reduced to zero when the space is in occupied-standby mode, the space conditioning system shall be controlled by occupancy sensing controls as specified in Section 120.2(e)3.

TABLE 160.5-B MULTI-LEVEL LIGHTING CONTROLS AND UNIFORMITY REQUIREMENTS
Luminaire Type	Minimum Required Control Steps (percent of full rated power1 )	Uniform level of illuminance shall be achieved by:	
LED luminaires and LED light source systems	Continuous dimming 10-100 percent	Continuous dimming 10-
100 percent	
Line-voltage sockets except GU-24	Continuous dimming 10-100 percent	Continuous dimming 10-
100 percent	
Low-voltage incandescent systems	Continuous dimming 10-100 percent	Continuous dimming 10-
100 percent	
Fluorescent luminaires	Continuous dimming 20-100 percent	Continuous dimming 20-
100 percent	

TABLE 160.5-B MULTI-LEVEL LIGHTING CONTROLS AND UNIFORMITY REQUIREMENTS (Continued)

GU-24 sockets rated for fluorescent ≤
20 watts;
Pin-based compact fluorescent ≤ 20
watts2
Linear fluorescent and U-bent
fluorescent ≤ 13 watts	
Minimum one step between 30-70 percent	Continuous dimming; or Stepped dimming; or Switching alternate lamps in a luminaire, or Separately switching circuits in multi-circuit track with a minimum of
two circuits.	
Track Lighting	Minimum one step between 30-70 percent	Continuous dimming; or Stepped dimming; or Switching alternate lamps in a luminaire, or Separately switching circuits in multi-circuit track with a minimum of
two circuits.	
Linear fluorescent and U-bent fluorescent > 13 watts	Minimum one step in each range: 20-40 %
50-70 %
75-85 %
100 %	Stepped dimming; or Continuous dimming; or Switching alternate lamps in each luminaire, having a minimum of 4 lamps per luminaire illuminating the same area and in the
same manner	
Other light sources, including HID and induction	Minimum one step between 50 - 70 percent	Stepped dimming; or Continuous dimming; or Switching alternate lamps in each luminaire, having a minimum of 2 lamps per luminaire, illuminating the same area and in the
same manner.	
Full rated input power of driver, ballast and lamp, corresponding to maximum ballast factor
Includes only pin based lamps: twin tube, multiple twin tube, and spiral lamps
Outdoor lighting and control equipment. Multifamily buildings shall comply with the applicable requirements of Sections 160.5(c)1 through 160.5(c)2.
Luminaire shielding requirements. All outdoor luminaires of 6,200 initial luminaire lumens or greater shall comply with Backlight, Uplight, and Glare (BUG) (in accordance with ANSI/IES TM-15-20, Annex A) requirements in accordance with Title 24, Part 11, Section 5.106.8.
Exception 1 to Section 160.5(c)1: Signs.
Exception 2 to Section 160.5(c)1: Lighting for building facades, public monuments, public art, statues and vertical surfaces of bridges.
Exception 3 to Section 160.5(c)1: Lighting not permitted by a health or life safety statute, ordinance or regulation to be a cutoff luminaire.
Exception 4 to Section 160.5(c)1: Temporary outdoor lighting.

Exception 5 to Section 160.5(c)1: Replacement of existing pole mounted luminaires in hardscape areas meeting all of the following conditions:
Where the existing luminaire does not meet the luminaire BUG requirements in Section 160.5(c)1; and
Spacing between existing poles is greater than six times the mounting height of the existing luminaires; and
Where no additional poles are being added to the site; and
Where new wiring to the luminaires is not being installed; and
Provided that the connected lighting power wattage is not increased.
Exception 6 to Section 160.5(c)1: Luminaires that illuminate the public right of way, including publicly maintained or utility-maintained roadways, sidewalks and bikeways.
Exception 7 to Section 160.5(c)1: Outdoor lighting attached to a multifamily building and separately controlled from the inside of a dwelling unit.
Controls for outdoor lighting. Outdoor lighting shall be independently controlled from other electrical loads, and the controls for outdoor lighting shall meet the following functional requirements:
Exception 1 to Section 160.5(c)2: Outdoor lighting not permitted by a health or life safety statute, ordinance or regulation to be turned OFF or reduced.
Exception 2 to Section 160.5(c)2: Lighting in tunnels required to be illuminated 24 hours per day and 365 days per year.
Daylight availability. All installed outdoor lighting shall be controlled by a photo control, astronomical time- switch control or other control capable of automatically shutting OFF the outdoor lighting when daylight is available.
Automatic scheduling controls.
Automatic scheduling controls shall be installed for all outdoor lighting. Automatic scheduling controls may be installed in combination with motion sensing controls or other outdoor lighting controls.
Automatic scheduling controls shall be capable of reducing the outdoor lighting power by at least 50 percent and no more than 90 percent, and separately capable of turning the lighting OFF, during scheduled unoccupied periods.
Automatic scheduling controls shall allow scheduling of a minimum of two nighttime periods with independent lighting levels, and may include an override function that turns lighting ON during its scheduled dim or OFF state for no more than two hours when an override is initiated.
Motion sensing controls.
Motion sensing controls shall be installed for the following luminaires. Motion sensing controls may be installed for other outdoor lighting and in combination with other outdoor lighting controls:
Outdoor luminaires other than those providing building façade, ornamental hardscape or outdoor dining lighting, where the bottom of the luminaire is mounted 24 feet above grade or lower; and
Outdoor wall-mounted luminaires installed for general hardscape parking lot lighting, located within one mounting height of a parking space, mounted 24 feet above grade or lower.
Motion sensing controls shall be capable of reducing the outdoor lighting power of each controlled luminaire by at least 50 percent and no more than 90 percent, and separately capable of turning the luminaire OFF, during unoccupied periods.
Motion sensing controls shall be capable of reducing the lighting to its dim or OFF state no longer than 15 minutes after the area has been vacated, and of returning the lighting to its ON state when the area becomes occupied.
No more than 1,500 watts of lighting power shall be controlled by a single sensor or as a single zone.

Exception 1 to Section 160.5(c)2C: Luminaires with a maximum rated wattage of 40 watts each are not required to have motion sensing controls.
Exception 2 to Section 160.5(c)2C: Applications listed as exceptions to Section 170.2(e)2A are not required to have motion sensing controls.
Exception 3 to Section 160.5(c)2C: Lighting subject to a health or life safety statute, ordinance or regulation may have a minimum time-out period longer than 15 minutes or a minimum dimming level above 50 percent when necessary to comply with the applicable law.
Sign lighting controls. All sign lighting shall meet the requirements below as applicable:
Indoor signs. All indoor sign lighting other than exit sign lighting shall be controlled with an automatic time-switch control or astronomical time-switch control.
Outdoor signs. Outdoor sign lighting shall meet the following requirements as applicable:
All outdoor sign lighting shall be controlled with a photocontrol in addition to an automatic time-switch control, or an astronomical time-switch control.
Exception to Section 160.5(d)2A: Outdoor signs in tunnels, and signs in large permanently covered outdoor areas that are intended to be continuously lit, 24 hours per day and 365 days per year.
All outdoor sign lighting that is ON both day and night shall be controlled with a dimmer that provides the ability to automatically reduce sign lighting power by a minimum of 65 percent during nighttime hours. Signs that are illuminated at night and for more than 1 hour during daylight hours shall be considered ON both day and night.
Exception to Section 160.5(d)2B: Outdoor signs in tunnels and large covered areas that are intended to be illuminated both day and night.
Demand Responsive Electronic Message Center (EMC) control. See Section 110.12 for requirements for demand responsive EMC controls.
Lighting control acceptance and installation certificate requirement. Multifamily common use areas shall comply with the applicable requirements of Sections 160.5(e)1 through 160.5(e)3.
Lighting control acceptance requirements. Before an occupancy permit is granted, indoor and outdoor lighting controls serving the building, area or site and installed to comply with Section 160.5(b)4D, 160.5(b)4C, 160.5(b)4E, 160.5(c)2 or 170.2(e)1Aiij shall be certified as meeting the Acceptance Requirements for Code Compliance as specified by Reference Nonresidential Appendix NA7.6 and NA7.8. A Certificate of Acceptance shall be submitted to the enforcement agency under Section 10-103(a) of Part 1 that the equipment and systems meet the acceptance requirements:
Reserved;
Reserved;
Automatic daylight controls shall be tested in accordance with Reference Nonresidential Appendix NA7.6.1;
Lighting shut-OFF controls shall be tested in accordance with Reference Nonresidential Appendix NA7.6.2;
Demand responsive lighting controls shall be tested in accordance with Reference Nonresidential Appendix NA7.6.3; and
Outdoor lighting controls shall be tested in accordance with Reference Nonresidential Appendix NA7.8; and
Lighting systems receiving the Institutional Tuning Power Adjustment Factor shall be tested in accordance with Reference Nonresidential Appendix NA7.6.4.
Demand responsive controls required to control controlled receptacles shall be tested in accordance with Reference Nonresidential Appendix NA7.6.5.
Lighting control installation certificate requirements. To be recognized for compliance with Part 6, an Installation Certificate shall be submitted in accordance with Section 10-103(a) for any lighting control system, energy

management control system, interlocked lighting system, lighting power adjustment factor, or additional wattage available for a videoconference studio, in accordance with the following requirements, as applicable:
Certification that when a lighting control system is installed to comply with lighting control requirements in Part 6, it complies with the applicable requirements of Section 110.9 and complies with Reference Nonresidential Appendix NA7.7.1.
Certification that when an energy management control system is installed to function as a lighting control required by Part 6, it functionally meets all applicable requirements for each application for which it is installed, in accordance with Sections 110.9, 160, 170 and 180, and complies with Reference Nonresidential Appendix NA7.7.2.
Certification that interlocked lighting systems used to serve an approved area comply with Section 170.2(e)2A and comply with Reference Nonresidential Appendix NA7.7.4.
Certification that lighting controls installed to earn a lighting Power Adjustment Factor (PAF) comply with Section 170.2(e)2B and comply with Reference Nonresidential Appendix NA7.7.5.
Reserved.
When certification is required by Title 24, Part 1, Section 10-103.1, the acceptance testing specified by Section 160.5(e) shall be performed by a Certified Lighting Controls Acceptance Test Technician (CLCATT). If the CLCATT is operating as an employee, the CLCATT shall be employed by a Certified Lighting Controls Acceptance Test Employer. The CLCATT shall disclose on the Certificate of Acceptance a valid CLCATT certification identification number issued by an approved Acceptance Test Technician Certification Provider. The CLCATT shall complete all Certificate of Acceptance documentation in accordance with the applicable requirements in Section 10-103(a)4.
NOTE: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference:
Sections 25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and 25943, Public
Resources Code.

SECTION 160.6 – MANDATORY REQUIREMENTS FOR ELECTRIC POWER DISTRIBUTION SYSTEMS
Multifamily buildings shall comply with the applicable requirements of Sections 160.6(a) through 160.6(e).
Service electrical metering. Each electrical service or feeder that provides power to the common use areas (interior and exterior) shall have a permanently installed metering system that measures electrical energy use in accordance with Table 160.6-A.
Exception to Section 160.6(a): Service or feeder for which the utility company provides a metering system for the multifamily building that indicates instantaneous kW demand and kWh for a utility-defined period.
TABLE 160.6-A MINIMUM REQUIREMENTS FOR METERING OR SUBMETERING OF ELECTRICAL LOAD
Metering Functionality	Electrical Services1 rated 50 kVA or less	Electrical Services1 rated more than 50kVA and less than or equal to 250 kVA	Electrical Services1 rated more than 250 kVA and less than or equal to 1000kVA	Electrical Services1 rated more than 1000kVA	
Instantaneous (at the time) kW demand	Required	Required	Required	Required	
Historical peak demand (kW)	Not required	Not required	Required	Required	
Tracking kWh for a user- definable period.	Required	Required	Required	Required	
kWh per rate period	Not required	Not required	Not required	Required	
1 “Electrical Services” applies to the building service-entrance rating or to the submetering service. For a building with submetering, this applies to the submetering service size to the common use areas.
Separation of electrical circuits for electrical energy monitoring. Electrical power distribution systems shall be designed so that measurement devices can monitor the electrical energy usage of load types according to Table 160.6-B.
Exception 1 to Section 160.6(b): For each separate load type, up to 10 percent of the connected load may be of any type.
Exception 2 to Section 160.6(b): Submetered electrical power distribution systems that provide power to dwelling units.

TABLE 160.6-B MINIMUM REQUIREMENTS FOR SEPARATION OF ELECTRICAL LOAD
Electrical Load Type	Electrical Services1 rated 50 kVA or less	Electrical Services1 rated more than 50kVA and less than or equal to 250 kVA	Electrical Services1 rated more than 250 kVA and less than or equal to 1000kVA	Electrical Services1 rated more than 1000kVA	
Lighting including exit and egress lighting and exterior lighting	Not required	All lighting in aggregate	All lighting disaggregated by floor, type or area	All lighting disaggregated by floor, type or area	
HVAC systems and components including chillers, fans, heaters, furnaces, package units, cooling towers, and circulation pumps associated with HVAC	Not required	All HVAC in aggregate	All HVAC in aggregate and each HVAC load rated at least 50 kVA	All HVAC in aggregate and each HVAC load rated at least 50kVA	
Domestic and service water system pumps and related systems and components	Not required	All loads in aggregate	All loads in aggregate	All loads in aggregate	
Plug load including appliances rated less than 25 kVA	Not required	All plug load in aggregate Groups of plug loads exceeding 25 kVA
connected load in an area
less than 5000 sf	All plug load separated by floor, type or area Groups of plug loads
exceeding 25 kVA
connected load in an area less than 5000 sf	All plug load separated by floor, type or area
All groups of plug loads exceeding 25 kVA connected load in an area less than 5000 sf	
Elevators, escalators, moving walks, and transit systems	Not required	All loads in aggregate	All loads in aggregate	All loads in aggregate	
Renewable power source (net or total)	Each group	Each group	Each group	Each group	
Loads associated with renewable power source	Not required	All loads in aggregate	All loads in aggregate	All loads in aggregate	
Charging stations for electric vehicles	All loads in aggregate	All loads in aggregate	All loads in aggregate	All loads in aggregate	
1 “Electrical Services” applies to the building service-entrance rating or to the submetering service. For a building with submetering, this applies to the submetering service size to the common use area.

Voltage drop. The maximum combined voltage drop on both installed feeder conductors and branch circuit conductors to the farthest connected load or outlet shall not exceed 5 percent.
Exception to Section 160.6(c): Voltage drop permitted by California Electrical Code Sections 647.4, 695.6 and 695.7.
Circuit controls for 120-volt receptacles and controlled receptacles. In all common areas, both controlled and uncontrolled 120 volt receptacles shall be provided in office areas, lobbies, conference rooms, kitchen areas in office spaces, and copy rooms. Controlled receptacles shall meet the following requirements, as applicable:
Install a control capable of automatically shutting OFF the controlled receptacles when the space is typically unoccupied, either at the receptacle or circuit level. When an automatic time switch control is installed it shall incorporate an override control that allows the controlled receptacle to remain ON for no more than 2 hours when an override is initiated and an automatic holiday “shut-OFF” feature that turns OFF all loads for at least 24 hours and then resumes the normally scheduled operation. Countdown timer switches shall not be used to comply with the automatic time switch control requirements; and
Install at least one controlled receptacle within 6 feet from each uncontrolled receptacle, or install a splitwired receptacle with at least one controlled and one uncontrolled receptacle. Where receptacles are installed in

SECTION 160.6 – MANDATORY REQUIREMENTS FOR ELECTRIC POWER DISTRIBUTION SYSTEM

modular furniture in open office areas, at least one controlled receptacle shall be installed at each workstation; and
Provide a permanent and durable marking for controlled receptacles or circuits to differentiate them from uncontrolled receptacles or circuits; and
NOTE: A hardwired power strip controlled by an occupant sensing control may be used to comply with Section 160.6(d). Plug-in strips and other plug-in devices shall not be used to comply with the requirements of this section.
Exception 1 to Section 160.6(d): Receptacles that are only for the following purposes:
Receptacles specifically for refrigerators and water dispensers in kitchen areas.
Receptacles located a minimum of six feet above the floor that are specifically for clocks.
Receptacles for network copiers, fax machines, A/V and data equipment other than personal computers in copy rooms.
Receptacles on circuits rated more than 20 amperes.
Receptacles connected to an uninterruptible power supply (UPS) that are intended to be in continuous use, 24 hours per day/365 days per year, and are marked to differentiate them from other uncontrolled receptacles or circuits.
Exception 2 to Section 160.6(d): Receptacles in common use areas providing shared provisions for living, eating, cooking or sanitation to dwelling units that would otherwise lack these provisions.
Demand responsive controls and equipment. See Section 110.12 for requirements for demand responsive controls and equipment.
NOTE: Definitions of terms and phrases in Section 160.6 are determined as specified in Section 100.1(b). Terms and phrases not found in Section 100.1(b) shall be defined as specified in Title 24, Part 3, Article 100 of the California Electrical Code.
NOTE: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections 25007,
25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8 and 25943, Public Resources Code.

SECTION 160.6 – MANDATORY REQUIREMENTS FOR ELECTRIC POWER DISTRIBUTION SYSTEM

SECTION 160.7 – MANDATORY REQUIREMENTS FOR COVERED PROCESSES
(a) Elevators. Elevators shall meet the requirements of Section 120.6(f).
(b) Pool and spa systems. Pool and spa systems available to multiple tenants or to the public shall comply with the applicable requirements of Section 110.4. Pool and spa systems installed for exclusive use by a single tenant shall comply with the applicable requirements of Section 150.0(p).
NOTE: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference:
Sections 25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8 and 25943, Public
Resources Code.

SECTION 160.6 – MANDATORY REQUIREMENTS FOR ELECTRIC POWER DISTRIBUTION SYSTEM

SECTION 160.8 – MANDATORY REQUIREMENTS FOR SOLAR READY BUILDINGS
Solar ready buildings. Newly constructed multifamily buildings shall meet the requirements of Section 110.10 applicable to the building project.

SECTION 160.9 – MANDATORY REQUIREMENTS FOR ELECTRIC READY BUILDINGS
Heat pump space heater ready. Systems using gas or propane furnaces to serve individual dwelling units shall include the following:
A dedicated 240 volt branch circuit wiring shall be installed within 3 feet from the furnace and accessible to the furnace with no obstructions. The branch circuit conductors shall be rated at 30 amps minimum. The blank cover shall be identified as “240V ready.” All electrical components shall be installed in accordance with the California Electrical Code.
The main electrical service panel shall have a reserved space to allow for the installation of a double pole circuit breaker for a future heat pump space heater installation. The reserved space shall be permanently marked as “For Future 240V use.”
Electric cooktop ready. Systems using gas or propane cooktops to serve individual dwelling units shall include the following:
A dedicated 240 volt branch circuit wiring shall be installed within 3 feet from the cooktop and accessible to the cooktop with no obstructions. The branch circuit conductors shall be rated at 50 amps minimum. The blank cover shall be identified as “240V ready.” All electrical components shall be installed in accordance with the California Electrical Code.
The main electrical service panel shall have a reserved space to allow for the installation of a double pole circuit breaker for a future electric cooktop installation. The reserved space shall be permanently marked as “For Future 240V use.”
Electric clothes dryer ready. Clothes dryer locations with gas or propane plumbing shall include the following:
Systems serving individual dwelling units shall include:
A dedicated 240 volt branch circuit wiring shall be installed within 3 feet from the clothes dryer location and accessible to the clothes dryer location with no obstructions. The branch circuit conductors shall be rated at 30 amps minimum. The blank cover shall be identified as “240V ready.” All electrical components shall be installed in accordance with the California Electrical Code.
The main electrical service panel shall have a reserved space to allow for the installation of a double pole circuit breaker for a future electric clothes dryer installation. The reserved space shall be permanently marked as “For Future 240V use.”
Systems in common use areas shall include:
Conductors or raceway shall be installed with termination points at the main electrical panel, via subpanels panels if applicable, to a location no more than 3 feet from each gas outlet or a designated location of future electric replacement equipment. Both ends of the conductors or raceway shall be labelled “Future 240V Use.” The conductors or raceway and any intervening subpanels, panelboards, switchboards and busbars shall be sized to meet the future electric power requirements, at the service voltage to the point at which the conductors serving the building connect to the utility distribution system, as specified below. The capacity requirements may be adjusted for demand factors in accordance with the California Electric Code. Gas flow rates shall be determined in accordance with the California Plumbing Code. Capacity shall be one of the following:
24 amps at 208/240 volts per clothes dryer;
2.6 kVA for each 10,000 Btu per hour of rated gas input or gas pipe capacity; or

The electrical power required to provide equivalent functionality of the gas-powered equipment as calculated and documented by the responsible person associated with the project.
NOTE: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code.
Reference: Sections 25007, 25008, 25218.5 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8 and
25943, Public Resources Code.

SUBCHAPTER 11
MULTIFAMILY BUILDINGS - PERFORMANCE AND PRESCRIPTIVE COMPLIANCE APPROACHES

SECTION 170.0 – GENERAL
Multifamily buildings shall comply with the applicable requirements of Sections 170.0 through 170.2. Sections 170.0 through 170.2 apply to dwelling units and common use areas in multifamily buildings. Nonresidential occupancies in mixed occupancy buildings shall comply with nonresidential requirements in Sections 120, 130, 140 and 141.
Multifamily buildings shall meet all of the following:
The applicable requirements of Sections 110.0 through 110.10.
The applicable requirements of Section 160.0 (mandatory features).
Either the performance standards Section 170.1 or the prescriptive standards Section 170.2 set forth in this subchapter for the climate zone in which the building is located. Climate zones are shown in Reference Joint Appendix JA2—Weather/Climate Data.
Exception to Section 170.0 (a)3: If a single development falls in more than one climate zone, all buildings in the subdivision or tract may be designed to meet the performance or prescriptive standards for the climate zone that contains 50 percent or more of the dwelling units.
NOTE: The Commission periodically updates, publishes and makes available to interested persons and local enforcement agencies precise descriptions of the climate zones, as specified in Reference Joint Appendix JA2— Weather/Climate Data.
NOTE: The requirements of Sections 170.1(a) through 170.2(e) apply to newly constructed buildings and Sections
180.1 and 180.2 specify changes to the requirements of Sections 170.1(a) through 170.2(e) that apply to additions or alterations.
NOTE: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference:
Sections 25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8 and 25943, Public
Resources Code.

SECTION 170.1 – PERFORMANCE APPROACH

A building complies with the performance approach if the energy budget calculated for the proposed design building under Subsection (b) is no greater than the energy budget calculated for the standard design building under Subsection (a).

Energy budget for the standard design building. The energy budget for the standard design building is expressed in terms of source energy and time-dependent valuation (TDV) energy, and they are determined by applying the mandatory and prescriptive requirements to the proposed design building. The source energy budget and the TDV energy budget is the sum of the TDV energy for space-conditioning, indoor lighting, mechanical ventilation, photovoltaic (PV) and battery storage system, service water heating and covered process loads.
Energy budget for the proposed design building. The energy budget for a proposed design building is expressed in terms of source energy and time-dependent valuation (TDV) energy, and they are determined by calculating the source energy and TDV energy for the proposed design building. The source energy budget and the TDV energy budget is the sum of the energy for space-conditioning, indoor lighting, mechanical ventilation, photovoltaic (PV) and battery storage system, and service water heating and covered process loads. The proposed building shall separately comply with the source energy budget and the TDV energy budget.
Exception to Section 170.1(b): A community shared solar electric generation system, or other renewable electric generation system, and/or community shared battery storage system, that provides dedicated power, utility energy reduction credits or payments for energy bill reductions to the permitted building and is approved by the Energy Commission as specified in Title 24, Part 1, Section 10-115, may offset part or all of the solar electric generation system or battery storage system TDV energy required to comply with the standards, as calculated according to methods established by the Commission in the Nonresidential ACM Reference Manual.
Calculation of energy budget. The TDV energy for both the standard design building and the proposed design building shall be computed by compliance software certified for this use by the Commission. The processes for compliance software approval by the Commission are documented in the ACM Approval Manual.
Compliance demonstration requirements for performance standards.
Certificate of Compliance and Application for a Building Permit. The application for a building permit shall include documentation pursuant to Sections 10-103(a)1 and 10-103(a)2 that demonstrates, using an approved calculation method, that the building has been designed so that its source energy budget and TDV energy budget do not exceed the standard design for the applicable climate zone.
Field verification of individual dwelling unit systems. When performance of installed features, materials, components, manufactured devices or systems above the minimum specified in Section 170.2 is necessary for the building to comply with Section 170.1, or is necessary to achieve a more stringent local ordinance, field verification shall be performed in accordance with the applicable requirements in the following subsections, and the results of the verification(s) shall be documented on applicable Certificates of Installation pursuant to Section 10-103(a)3 and applicable Certificates of Verification pursuant to Section 10-103(a)5.
EER/EER2/SEER/SEER2/CEER/HSPF/HSPF2 Rating. When performance compliance requires installation of a space-conditioning system with a rating that is greater than the minimum rating required by Table 170.2-K or specified for the standard design, the installed system shall be field verified in accordance with the procedures specified in the applicable sections of Reference Residential Appendix RA3.
Variable capacity heat pump (VCHP) compliance option. When performance compliance requires installation of a heat pump system that meets all the requirements of the VCHP compliance option specified in the ACM Reference Manual, the system shall be field verified in accordance with the procedures in Reference Residential Appendix RA3.4.4.3.
Low leakage air handler. When performance compliance requires installation of a low leakage air-handling unit, the installed air handling unit shall be field verified in accordance with the procedures specified in Reference Residential Appendix RA3.1.4.3.9.

Reserved.
Heat pump—rated heating capacity. When performance compliance requires installation of a heat pump system, the heating capacity values at 47°F and 17°F shall be field verified in accordance with the procedures specified in Reference Residential Appendix RA3.4.4.2.
Whole-house fan. When performance compliance requires installation of a whole-house fan, the whole-house fan ventilation airflow rate and fan efficacy shall be field verified in accordance with the procedures in Reference Residential Appendix RA3.9.
Central fan ventilation cooling system. When performance compliance requires installation of a central fan ventilation cooling system, the installed system shall be field verified in accordance with the procedures in Reference Residential Appendix RA3.3.4.
Dwelling unit enclosure air leakage. When performance compliance requires a building enclosure leakage rate that is lower than the standard design, the building enclosure shall be field verified in accordance with the procedures specified in Reference Residential Appendix RA3.8.
Quality insulation installation (QII). When performance compliance requires field verification of QII, the building insulation system shall be field verified in accordance with the procedures in Reference Residential Appendix RA3.5.
Precooling. When performance compliance requires field verification of the installation and programming of a precooling thermostat, it shall be field verified in accordance with the procedures in Reference Residential Appendix RA3.4.5.
NOTE: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference:
Sections 25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and 25943, Public
Resources Code.

SECTION 170.2 – PRESCRIPTIVE APPROACH
Multifamily buildings, including both dwelling units and common use areas, that comply with the prescriptive standards shall be designed, constructed and equipped to meet all of the requirements for the appropriate climate zone shown in Table 170.2-A. In Table 170.2-A, NA (not allowed) means that feature is not permitted in a particular climate zone and NR (no requirement) means that there is no prescriptive requirement for that feature in a particular climate zone. Installed components shall meet the following requirements:
Envelope component requirements.
Exterior roofs and ceilings. Exterior roofs and ceilings shall comply with each of the applicable requirements in this subsection:
Roofing products. All roofing products shall meet the requirements of Section 110.8 and the applicable minimum aged solar reflectance and thermal emittance requirements of Table 170.2-A.
Exception 1 to Section 170.2(a)1A: Building integrated photovoltaic panels and building integrated solar thermal panels are exempt from the minimum requirements for solar reflectance and thermal emittance or SRI.
Exception 2 to Section 170.2(a)1A: Roof constructions with a weight of at least 25 lb/ft² are exempt from the minimum requirements for solar reflectance and thermal emittance or SRI.
Roof insulation. roofs shall have an overall assembly U-factor no greater than the applicable value in Table 170.2-A, meeting i, ii, iii or iv below. Where required by Sections 110.8 and 160.1(a), insulation shall be placed in direct contact with a continuous roof or drywall ceiling.
Option A: Reserved.
Option B: A minimum R-value of insulation installed between the roof rafters in contact with the roof deck and an additional layer of ceiling insulation located between the attic and the conditioned space when meeting Section 170.2(c)3Biia; or
Option C: A minimum R-value of ceiling insulation located between the attic and the conditioned space when meeting Section 170.2(c)3Biib.
Option D: A minimum U-factor for roof assemblies above conditioned space without attic space.
Radiant barrier. A radiant barrier required in Table 170.2-A shall meet the requirements specified in Section 110.8(j) and shall meet the installation criteria specified in Reference Residential Appendix RA4.
Wall insulation.
Exterior walls shall have an overall assembly U-factor no greater than the applicable value in Table 170.2-A.
Demising walls shall meet the requirements of Section 160.1(b)7. Vertical windows in demising walls between conditioned and unconditioned spaces shall have an area-weighted average U-factor no greater than the applicable value in Table 170.2-A.
Fenestration.
Vertical fenestration and glazed doors in exterior walls shall comply with Subsections i, ii and iii:
Percent fenestration area shall be limited in accordance with the applicable requirements of a and b below:
A total fenestration area no greater than 20 percent of the conditioned floor area; and
A total fenestration area no greater than 40 percent of the gross exterior wall area.
Note: Demising walls are not exterior walls, and therefore demising wall area is not part of the gross exterior wall area, and fenestration in demising walls is not part of the fenestration area limitation.

Fenestration properties. Installed fenestration products, including glazed doors, shall have an area- weighted average U-factor, Relative Solar Heat Gain Coefficient (RSHGC), and Visual Transmittance (VT) meeting the applicable fenestration values in Table 170.2-A and shall be determined in accordance with Sections 110.6(a)2 and 110.6(a)3.
Vertical fenestration in demising walls between conditioned and unconditioned spaces is only required to comply with the area-weighted average U-factor requirement in Table 170.2-A.
Exception 1 to Section 170.2(a)3Aii: For each dwelling unit, up to 3 square feet of new glazing area installed in doors shall not be required to meet the U-factor and RSHGC requirements of Table 170.2-A.
Exception 2 to Section 170.2(a)3Aii: For fenestration containing chromogenic type glazing:
The lower-rated labeled U-factor and SHGC shall be used with automatic controls to modulate the amount of solar gain and light transmitted into the space in multiple steps in response to daylight levels or solar intensity;
Chromogenic glazing shall be considered separately from other fenestration; and
Area-weighted averaging with other fenestration that is not chromatic shall not be permitted and shall be determined in accordance with Section 110.6(a).
Exception 3 to Section 170.2(a)3Aii: For dwelling units containing unrated site-built fenestration that meets the maximum area restriction, the U-factor and SHGC can be determined in accordance with Nonresidential Reference Appendix NA6 or using default values in Table 110.6-A and Table 110.6-B.
Exception 4 to Section 170.2(a)3Aii: Fenestration in dwelling units of buildings that are three habitable stories or fewer in Climate Zones 1, 3, 5 and 16 is not required to comply with the RSHGC requirements.

Exception 5 to Section 170.2(a)3Aii: Fenestration in dwelling units of buildings that are three habitable stories or fewer is not required to comply with the VT requirements.
Shading. Where Table 170.2-A requires a maximum RSHGC, the requirements shall be met with an area- weighted average RSHGC excluding the effects of interior shading, no greater than the applicable value in Table 170.2-A.
For the purposes of this paragraph, the RSHGC of a vertical window is:
The solar heat gain coefficient of the window; or
Relative solar heat gain coefficient is calculated using Equation 170.2-A, if the window has an overhang that extends beyond each side of the window jamb by a distance equal to the overhang’s horizontal projection.
Exception 1 to Section 170.2(a)3Aiiib: An area-weighted average relative solar heat gain coefficient of 0.56 or less shall be used for windows:
That are in the first story of exterior walls that form a display perimeter; and
For which codes restrict the use of overhangs to shade the windows.
Exception 2 to Section 170.2(a)3Aiiib: For vertical glazing containing chromogenic type glazing:
the lower-rate labeled RSHGC shall be used with automatic controls to modulate the amount of heat flow into the space in multiple steps in response to daylight levels or solar intensity; and
chromogenic glazing shall be considered separately from other glazing; and
area-weighted averaging with other glazing that is not chromogenic shall not be permitted.
Note: Demising walls are not exterior walls, and therefore fenestration in demising walls is not subject to SHGC requirements.

RSHGC = SHGC × [1 + a × (2.72-PF – 1) × (sin(b × Az) – c)]	(Equation 170.2-A) WHERE:
	a	b	c	
Overhang	0.150	0.130	5.67	
Exterior Horizontal Slat	0.144	0.133	5.13	

RSHGC	=	Relative Solar Heat Gain Coefficient.	
SHGC	=	Solar Heat Gain Coefficient of the vertical fenestration.	
Az	=	Azimuth of the vertical fenestration I degrees.	
PF	=	Projection factor as calculated by Equation 140.3-D.	
Vertical fenestration shall have an area-weighted average Visible Transmittance (VT) no less than the applicable value in Table 170.2-A, or Equation 170.2-B, as applicable.
Exception 1 to Section 170.2(a)3Aiv: When the window’s primary and secondary sidelit daylit zones are completely overlapped by one or more skylit daylit zones, then the window need not comply with Section 170.2(a)3Aivw.
Exception 2 to Section 170.2(a)3Aiv: If the window’s VT is not within the scope of NFRC 200 or ASTM E972, then the VT shall be calculated according to Reference Nonresidential Appendix NA6.
Exception 3 to Section 170.2(a)3Aiv: For vertical windows containing chromogenic type glazing:
The higher rated labeled VT shall be used with automatic controls to modulate the amount of light transmitted into the space in multiple steps in response to daylight levels or solar intensity;
Chromogenic glazing shall be considered separately from other glazing; and
Area-weighted averaging with other glazing that is not chromogenic shall not be permitted.
Exception 4 to Section 170.2(a)3iv: Fenestration in dwelling units of buildings that are three habitable stories or fewer is not required to comply with the VT requirements.
NOTE: Demising walls are not exterior walls, and therefore windows in demising walls are not subject to VT requirements.
VT ≥ 0.11/WWR	(Equation 170.2-B)
where:
WWR	=	Window Wall Ratio, the ratio of (i) the total window area of the entire building to (ii) the total gross exterior wall area of the entire building. If the WWR is greater than 0.40, then
0.40 shall be used as the value for WWR in Equation 170.2-B. VT	=	Visible Transmittance of framed window.
Skylights shall:
Have an area no greater than 5 percent of the gross exterior roof area Skylight Roof Ratio (SRR); and
Exception 1 to Section 170.2(a)3Bi: Buildings with an atrium over 55 feet high shall have a skylight area no greater than 10 percent of the gross exterior roof area.
Have an area-weighted performance rating U-factor no greater than the applicable value in Table 170.2- A.
Exception 2 to Section 170.2(a)3Bii: For each dwelling unit up to 16 square feet of new skylight area with a maximum U-factor of 0.55 and a maximum SHGC of 0.30.

Solar heat gain coefficient. Have an area-weighted performance rating solar heat gain coefficient no greater than the applicable value in Table 170.2-A.
Exception to Sections 170.2(a)3Bii and 170.2(a)3Biii: For skylights containing chromogenic type glazing:
the lower-rated labeled SHGC shall be used with automatic controls to modulate the amount of heat flow into the space in multiple steps in response to daylight levels or solar intensity; and
chromogenic glazing shall be considered separately from other glazing; and
area-weighted averaging with other glazing that is not chromogenic shall not be permitted.
Haze value. Have a glazing material or diffuser that has a measured haze value greater than 90 percent, determined according to ASTM D1003 or other test method approved by the Energy Commission.
Exception to Section 170.2(a)3Biv: Skylights designed and installed to exclude direct sunlight entering the occupied space by the use of fixed or automated baffles or the geometry of the skylight and light well.
All exterior doors, excluding glazed doors, that separate conditioned space from unconditioned space or from ambient air shall have a U-factor not greater than the applicable value in Table 170.2-A. Glazed doors must comply with the requirements of Section 170.2(a)3A.
Exception to Section 170.2(a)4: Swinging doors that are required to have fire protection are not required to meet the applicable door value in Table 170.2-A.
Floors shall meet the following requirements:
Raised floors shall be insulated such that the floor assembly has an assembly U-factor equal to or less than shown in Table 170.2-A, or shall be insulated between wood framing with insulation having an R-value equal to or greater than shown in Table 170.2-A.
All buildings with three habitable stories or fewer shall have slab floor perimeter insulation installed with a U- factor equal to or less than or R-value equal to or greater than shown in Table 170.2-A. The minimum depth of concrete slab floor perimeter insulation shall be 16 inches or the depth of the footing of the building, whichever is less.
Exception to Section 170.2(a)5: Raised-floor insulation may be omitted if the foundation walls are insulated to meet the wall insulation minimums shown in Table 170.2-A.
All buildings up to three habitable stories shall comply with the quality insulation installation (QII) requirements shown in Table 170.2-A. When QII is required, insulation installation shall meet the criteria specified in Reference Appendix RA3.5.
Exception to Section 170.2(a): The insulation requirements of Table 170.2-A and Table 170.2-B may be met by ceiling, roof deck, wall or floor assemblies that meet the required maximum U-factors using a U-factor calculation method that considers the thermal effects of all elements of the assembly and is approved by the Executive Director.

TABLE 170.2-A ENVELOPE COMPONENT PACKAGE – Multifamily Standard Building Design
Multifamily	Climate Zone	
	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	
Roof/Ceiling	Option B (meets § 170.2(a)1Bii)	Below Roof Deck Insulation 1,2
(With Air Space)	NR	NR	NR	R19	NR	NR	NR	R19	R19	R13	R19	R19	R19	R19	R19	R13	
		Ceiling Insulation	R 38	R 38	R 30	R 38	R 30	R 30	R 30	R 38	R 38	R 38	R 38	R 38	R 38	R 38	R 38	R 38	
		Radiant Barrier	NR	REQ	REQ	NR	REQ	REQ	REQ	NR	NR	NR	NR	NR	NR	NR	NR	NR	
		
Low- sloped	Aged Solar Reflectance	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	0.63	NR	0.63	NR	
			Thermal Emittance	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	0.75	NR	0.75	NR	
			Solar Reflectance Index
(SRI)	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	75	NR	75	NR	
		
Steep- sloped	Aged Solar Reflectance	NR	NR	NR	NR	NR	NR	NR	NR	NR	0.20	0.20	0.20	0.20	0.20	0.20	NR	
			Thermal Emittance	NR	NR	NR	NR	NR	NR	NR	NR	NR	0. 75	0.75	0.75	0.75	0.75	0.75	NR	
			Solar Reflectance Index
(SRI)	NR	NR	NR	NR	NR	NR	NR	NR	NR	16	16	16	16	16	16	NR	
	Option C (meets § 170.2(a)1Biii)	Ceiling Insulation	R 38	R 30	R 30	R 30	R 30	R 30	R 30	R 30	R 30	R 30	R 38	R 38	R 38	R 38	R 38	R 38	
		Radiant Barrier	NR	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	NR	
		
Low- sloped	Aged Solar Reflectance	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	0.63	NR	0.63	NR	
			Thermal Emittance	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	0.75	NR	0.75	NR	
			Solar Reflectance Index
(SRI)	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	75	NR	75	NR	
		
Steep- sloped	Aged Solar Reflectance	NR	NR	NR	NR	NR	NR	NR	NR	NR	0.20	0.20	0.20	0.20	0.20	0.20	NR	
			Thermal Emittance	NR	NR	NR	NR	NR	NR	NR	NR	NR	0. 75	0.75	0.75	0.75	0.75	0.75	NR	
			Solar Reflectance Index
(SRI)	NR	NR	NR	NR	NR	NR	NR	NR	NR	16	16	16	16	16	16	NR	
	Option D (Non Attic Roof)	Metal Building U-factor	0.041	0.041	0.041	0.041	0.041	0.041	0.041	0.041	0.041	0.041	0.041	0.041	0.041	0.041	0.041	0.041	
		Wood Framed and Other U-factor	0.028	0.028	0.034	0.028	0.034	0.034	0.039	0.028	0.028	0.028	0.028	0.028	0.028	0.028	0.028	0.028	
		
Low- sloped	Aged Solar Reflectance	NR	NR	NR	NR	NR	NR	NR	NR	0.63	0.63	0.63	NR	0.63	0.63	0.63	NR	
			Thermal Emittance	NR	NR	NR	NR	NR	NR	NR	NR	0.75	0.75	0.75	NR	0.75	0.75	0.75	NR	
			Solar Reflectance Index
(SRI)	NR	NR	NR	NR	NR	NR	NR	NR	75	75	75	NR	75	75	75	NR	
		
Steep- sloped	Aged Solar Reflectance	NR	0.20	0.20	0.20	0.20	0.20	0.20	0.20	0.20	0.20	0.20	0.20	0.20	0.20	0.20	NR	
			Thermal Emittance	NR	0. 75	0. 75	0. 75	0. 75	0. 75	0. 75	0. 75	0. 75	0. 75	0.75	0.75	0.75	0.75	0.75	NR	
			Solar Reflectance Index
(SRI)	NR	16	16	16	16	16	16	16	16	16	16	16	16	16	16	NR	

	

Walls	Metal-Building, any fire rating	0.061	0.061	0.061	0.061	0.061	0.061	0.061	0.061	0.061	0.061	0.057	0.057	0.057	0.057	0.057	0.057		
		Framed (wood, metal) and other
>1hr fire rating	
0.059	
0.059	
0.059	
0.059	
0.059	
0.065	
0.065	
0.059	
0.059	
0.059	
0.051	
0.059	
0.059	
0.051	
0.051	
0.051		
		Framed (wood, metal) and
other,
≤1hr fire rating3	
0.051	
0.051	
0.051	
0.051	
0.051	
0.065	
0.065	
0.051	
0.051	
0.051	
0.051	
0.051	
0.051	
0.051	
0.051	
0.051		
		
Mass Light 4,5	U 0.077	U 0.077	U 0.077	U 0.077	U 0.077	U 0.077	U 0.077	U 0.077	U 0.077	U 0.077	U 0.077	U 0.077	U 0.077	U 0.077	U 0.077	U 0.059		
			R 13	R 13	R 13	R 13	R 13	R 13	R 13	R 13	R 13	R 13	R 13	R 13	R 13	R 13	R 13	R 17		
		Mass Heavy	0.253	0.650	0.650	0.650	0.650	0.690	0.690	0.690	0.690	0.650	0.184	0.253	0.211	0.184	0.184	0.160		

Floors/Soffits	Slab Perimeter, Three Habitable Stories or less	
NR	
NR	
NR	
NR	
NR	
NR	
NR	
NR	
NR	
NR	
NR	
NR	
NR	
NR	
NR	U 0.58		
																		R 7.0		
		
Wood Framed	U 0.037	U 0.037	U 0.037	U 0.037	U 0.037	U 0.037	U 0.037	U 0.037	U 0.037	U 0.037	U 0.037	U 0.037	U 0.037	U 0.037	U 0.037	U 0.037		
			R 19	R 19	R 19	R 19	R 19	R 19	R 19	R 19	R 19	R 19	R 19	R 19	R 19	R 19	R 19	R 19		
		
Raised Mass	U 0.092	U 0.092	U 0.269	U 0.269	U- 0.269	U 0.269	U 0.269	U 0.269	U 0.269	U 0.269	U 0.092	U 0.138	U 0.092	U 0.092	U 0.138	U 0.092		
			R 8.0	R 8.0	R 0	R 0	R 0	R 0	R 0	R 0	R 0	R 0	R 8.0	R 4.0	R 8.0	R 8.0	R 4.0	R 8.0		
		Other	0.048	0.039	0.071	0.071	0.071	0.071	0.071	0.071	0.071	0.071	0.039	0.071	0.071	0.039	0.039	0.039		

Quality Insulation Installation (QII) for buildings up to three habitable stories	Yes	Yes	Yes	Yes	Yes	Yes	NR	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	
Fenestration	

Curtain Wall/ Storefront	Maximum U-factor	0.38	0.41	0.41	0.41	0.41	0.41	0.41	0.41	0.41	0.41	0.41	0.41	0.41	0.41	0.41	0.38	
		Maximum RSHGC, three or fewer habitable stories	NR	0.26	NR	0.26	NR	0.26	0.26	0.26	0.26	0.26	0.26	0.26	0.26	0.25	0.26	NR	
		Maximum RSHGC, four or more habitable stories	0.35	0.26	0.26	0.26	0.26	0.26	0.26	0.26	0.26	0.26	0.26	0.26	0.26	0.25	0.26	0.25	
		Minimum VT, four or more habitable stories	0.46	0.46	0.46	0.46	0.46	0.46	0.46	0.46	0.46	0.46	0.46	0.46	0.46	0.46	0.46	0.46	

NAFS 2017
Performance Class AW5	Maximum U-factor	0.38	0.40	0.40	0.40	0.40	0.40	0.40	0.40	0.40	0.40	0.40	0.40	0.40	0.40	0.40	0.38	
		Maximum RSHGC, three or less habitable stories	NR	0.24	NR	0.24	NR	0.24	0.24	0.24	0.24	0.24	0.24	0.24	0.24	0.24	0.24	NR	
		Maximum RSHGC, four or more habitable stories	0.35	0.24	0.24	0.24	0.24	0.24	0.24	0.24	0.24	0.24	0.24	0.24	0.24	0.24	0.24	0.24	
		Minimum VT, four or more habitable stories	0.37	0.37	0.37	0.37	0.37	0.37	0.37	0.37	0.37	0.37	0.37	0.37	0.37	0.37	0.37	0.37	
	
All Other Fenestration	Maximum U-factor	0.30	0.30	0.30	0.30	0.30	0.30	0.34	0.34	0.30	0.30	0.30	0.30	0.30	0.30	0.30	0.30	
		Maximum RSHGC, three or less habitable stories	NR	0.23	NR	0.23	NR	0.23	0.23	0.23	0.23	0.23	0.23	0.23	0.23	0.23	0.23	NR	
		Maximum RSHGC, four or more habitable stories	0.35	0.23	0.23	0.23	0.23	0.23	0.23	0.23	0.23	0.23	0.23	0.23	0.23	0.23	0.23	0.23	
	Maximum Window to Floor Ratio	20%	20%	20%	20%	20%	20%	20%	20%	20%	20%	20%	20%	20%	20%	20%	20%	
	Maximum Window to Wall Ratio	40%	40%	40%	40%	40%	40%	40%	40%	40%	40%	40%	40%	40%	40%	40%	40%	
	Maximum Skylight Roof Ratio	5%	5%	5%	5%	5%	5%	5%	5%	5%	5%	5%	5%	5%	5%	5%	5%	
Exterior Doors6	

Maximum U-factor	Dwelling Unit Entry	0.20	0.20	0.20	0.20	0.20	0.20	0.20	0.20	0.20	0.20	0.20	0.20	0.20	0.20	0.20	0.20	
		Common Use Area Entry Non-Swinging	0.50	1.45	1.45	1.45	1.45	1.45	1.45	1.45	1.45	1.45	1.45	1.45	1.45	1.45	1.45	0.50	
		Common Use Area Entry Swinging	0.70	0.70	0.70	0.70	0.70	0.70	0.70	0.70	0.70	0.70	0.70	0.70	0.70	0.70	0.70	0.70	

Footnote requirements to TABLE 170.2-A:
Install the specified R-value with an air space present between the roofing and the roof deck. Such as standard installation of concrete or clay tile.
R-values shown for below roof deck insulation are for wood-frame construction with insulation installed between the framing members. Alternatives including insulation above rafters or above roof deck shall comply with the performance standards.
Assembly U-factors for exterior framed walls can be met with cavity insulation alone or with continuous insulation alone, or with both cavity and continuous insulation that results in an assembly U-factor equal to or less than the U-factor shown. Use Reference Joint Appendices JA4 Table 4.3.1, 4.3.1(a), or Table 4.3.4 to determine alternative insulation products to be less than or equal to the required maximum U-factor.
Mass wall has a heat capacity greater than or equal to 7.0 Btu/h-ft2.
Product must be certified to meet the North American Fenestration Standard/Specification for an Architectural Window (AW).
Glazed doors must meet the fenestration requirements.

Minimum daylighting requirement for large enclosed spaces. In Climate Zones 2 through 15, conditioned enclosed spaces and unconditioned enclosed spaces that are greater than 5,000 ft² and that are directly under a roof with ceiling heights greater than 15 feet shall meet the following requirements:
A combined total of at least 75 percent of the floor area, as determined in building floor plan (drawings) view, shall be within one or more of the following:
Primary sidelight daylight zone in accordance with Section 160.5(b)4Dib, or
The total floor area in the space within a horizontal distance of 0.7 times the average ceiling height from the edge of rough opening of skylights.
All skylit daylit zones and primary sidelit daylit zones shall be shown on building plans.
General lighting in daylit zones shall be controlled in accordance with Section 160.5(b)4D.
The total skylight area is at least 3 percent of the total floor area in the space within a horizontal distance of 0.7 times the average ceiling height from the edge of rough opening of skylights; or the product of the total skylight area and the average skylight visible transmittance is no less than 1.5 percent of the total floor area in the space within a horizontal distance of 0.7 times the average ceiling height from the edge of rough opening of skylights.
All skylights shall have a glazing material or diffuser that has a measured haze value greater than 90 percent, tested according to ASTM D1003 (notwithstanding its scope) or another test method approved by the Commission.
Exception 1 to Section 170.2(b): In buildings with unfinished interiors, future enclosed spaces for which there are plans to have:
A floor area of less than or equal to 5,000 square feet; or
Ceiling heights of less than or equal to 15 feet. This exception shall not be used for S-1 or S-2 (storage), or for F-1 or F-2 (factory) occupancies.
Exception 2 to Section 170.2(b): Enclosed spaces having a designed general lighting system with a lighting power density less than 0.5 watts per square foot.
Exception 3 to Section 170.2(b): Enclosed spaces where it is documented that permanent architectural features of the building, existing structures or natural objects block direct beam sunlight on at least half of the roof over the enclosed space for more than 1500 daytime hours per year between 8 a.m. and 4 p.m.
Space-conditioning systems. All space heating, space cooling and ventilation equipment shall comply with minimum Appliance Efficiency Regulations as specified in Sections 110.0 through 110.2 and the applicable requirements of Subsections 1 through 4.
Sizing and equipment selection—common use areas. Mechanical heating and mechanical cooling equipment serving common use areas of multifamily buildings shall be the smallest size, within the available options of the desired equipment line, necessary to meet the design heating and cooling loads of the building, as calculated according to Subsection 2 below.
Exception 1 to Section 170.2(c)1: Where it can be demonstrated to the satisfaction of the enforcing agency that oversizing will not increase building TDV energy use.
Exception 2 to Section 170.2(c)1: Standby equipment with controls that allow the standby equipment to operate only when the primary equipment is not operating.
Exception 3 to Section 170.2(c)1: Multiple units of the same equipment type, such as multiple chillers and boilers, having combined capacities exceeding the design load, if they have controls that sequence or otherwise optimally control the operation of each unit based on load.
Calculations—common use areas. In making equipment sizing calculations under Subsection (c)1, all of the following rules shall apply:

Heating and cooling loads. Heating and cooling system design loads shall be determined in accordance with the method in the 2017 ASHRAE Handbook, Fundamentals Volume, or as specified in a method approved by the Commission.
Indoor design conditions. Indoor design temperature and humidity conditions for comfort applications shall be determined using ASHRAE Standard 55 or the 2017 ASHRAE Handbook, Fundamentals Volume, except that winter humidification and summer dehumidification shall not be required.
Outdoor design conditions. Outdoor design conditions shall be in accordance with the design conditions from Reference Joint Appendix JA2, which is based on data from the ASHRAE Climatic Data for Region X. Heating design temperatures shall be no lower than the Heating Winter Median of Extremes values. Cooling design temperatures shall be no greater than the 0.5 percent Cooling Dry Bulb and Mean Coincident Wet Bulb values.
Exception to Section 170.2(c)2C: Cooling design temperatures for cooling towers shall be no greater than the
0.5 percent Cooling Design Wet Bulb values.
Ventilation. Outdoor air ventilation loads shall be calculated using the ventilation rates required in Section 160.2(c)3.
Envelope. Envelope heating and cooling loads shall be calculated using envelope characteristics, including square footage, thermal conductance, solar heat gain coefficient or shading coefficient, and air leakage, consistent with the proposed design.
Lighting. Lighting heating and cooling loads shall be based on actual design lighting levels or power densities as specified in Section 170.2(e)1.
People. Occupant density shall be based on the expected occupancy of the building and shall be the same as determined under Section 160.2(c)3A, if used. Sensible and latent heat gains shall be as listed in the 2017 ASHRAE Handbook—Fundamentals, Chapter 18.
Process loads. Loads caused by a process shall be based upon actual information on the intended use of the building.
Miscellaneous equipment. Equipment loads other than process loads shall be calculated using design data compiled from one or more of the following sources:
Actual information based on the intended use of the building; or
Published data from manufacturers’ technical publications or from technical societies, such as the ASHRAE Handbook, Applications Volume; or
Other data based on the designer's experience of expected loads and occupancy patterns.
Internal heat gains. Internal heat gains may be ignored for heating load calculations.
Safety factor. Calculated design loads based on Sections 170.2(c)2A through K may be increased by up to 10 percent to account for unexpected loads or changes in space usage.
Other loads. Loads such as warm-up or cool-down shall be calculated from principles based on the thermal capacity of the building and its contents, the degree of setback, and desired recovery time; or may be assumed to be no more than 30 percent for heating and 10 percent for cooling of the steady-state design loads. In addition, the steady-state load may include a safety factor in accordance with Section 170.2(c)2K.
Dwelling unit space-conditioning systems.
Heating system type. Space-conditioning systems serving dwelling units shall meet i or ii. Systems that cannot meet the requirements of i or ii, including multi-zone systems and systems using central boilers or chillers, shall comply with the performance requirements of Section 170.1.
Multifamily buildings three habitable stories or fewer. For Climate Zones 1 through 15, the space- conditioning system shall be a heat pump. For Climate Zone 16, the space-conditioning system shall be an air conditioner with furnace. Additionally, balanced ventilation systems serving these dwelling units shall meet the applicable requirements of Section 170.2(c)3Bivc.

Multifamily buildings four habitable stories or greater. For Climate Zones 2 through 15, the space- conditioning system shall be a heat pump. For Climate Zones 1 and 16, the space-conditioning system shall be a dual-fuel heat pump.
Exception to Section 170.2(c)3A: A supplemental heating unit may be installed in a space served directly or indirectly by a primary heating system, provided that the unit thermal capacity does not exceed 2 kW or 7,000 Btu/hr and is controlled by a time-limiting device not exceeding 30 minutes.
Space-conditioning and ventilation systems. All space heating and space cooling equipment serving dwelling units shall comply with minimum Appliance Efficiency Regulations as specified in Sections 110.0 through 110.2 and meet all applicable requirements of Sections 160.3(b) and 170.2(c)2.
Refrigerant charge—systems serving individual dwelling units. When refrigerant charge verification or fault indicator display is shown as required by Table 170.2-K, the system shall comply with either Section 170.2(c), 170.2(c)3Bia or 170.2(c)3Bib:
Air-cooled air conditioners and air-source heat pumps, including but not limited to ducted split systems, ducted packaged systems, small duct high velocity systems and mini-split systems, shall comply with Subsections I, II and III, unless the system is of a type that cannot be verified using the specified procedures:
Have measurement access holes (MAH) installed according to the specifications in Reference Residential Appendix Section RA3.2.2.3; and
System airflow rate in accordance with Subsection A or B below shall be confirmed through field verification and diagnostic testing in accordance with all applicable procedures specified in Reference Residential Appendix Section RA3.3 or an approved alternative procedure as specified by RA1; and
For small duct high velocity systems, the system airflow rate shall be greater than or equal to 250 cfm per ton; or
For all other air-cooled air conditioner or air-source heat pump systems, the system airflow rate shall be greater than or equal to 350 cfm per ton.
The installer shall charge the system according to manufacturer’s specifications. Refrigerant charge shall be verified according to one of the following options, as applicable:
The installer and rater shall perform the standard charge procedure as specified by Reference Residential Appendix Section RA3.2.2 or an approved alternative procedure as specified by RA1; or
The system shall be equipped with a fault indicator display (FID) device that meets the specifications of Reference Joint Appendix JA6. The installer shall verify the refrigerant charge and FID device in accordance with the procedures in Reference Residential Appendix Section RA3.4.2. The HERS Rater shall verify the FID device in accordance with the procedures in Section RA3.4.2; or
The installer shall perform the weigh-in charging procedure as specified by Reference Residential Appendix Section RA3.2.3.1, provided the system is of a type that can be verified using the RA3.2.2 standard charge verification procedure and RA3.3 airflow rate verification procedure or approved alternatives in RA1. The HERS Rater shall verify the charge using RA3.2.2 and RA3.3 or approved alternatives in RA1.
Exception to Section 170.2(c)3BiaI: Systems that cannot conform to the specifications for hole location in Reference Residential Appendix Figure RA3.2-1 shall not be required to provide holes as described in Figure RA3.2-1.
Exception to Section 170.2(c)3BiaII: Standard ducted systems without zoning dampers may comply with the minimum airflow rate by meeting the applicable requirements in Table 160.3-A and Table 160.3-B as confirmed by field verification and diagnostic testing in accordance with the procedures in Reference Residential Appendix Sections RA3.1.4.4 and RA3.1.4.5. The design clean-filter pressure

drop requirements of Section 160.2(b)1D for the system air filter device(s) shall conform to the requirements given in Table 160.3-A and Table 160.3-B.
Exception to Section 170.2(c)3BiaIII: When the outdoor temperature is less than 55 degrees F and the installer utilizes the weigh-in charging procedure in Reference Residential Appendix Section RA3.2.3.1 to verify the refrigerant charge, the installer may elect to utilize the HERS Rater verification procedure in Reference Residential Appendix Section RA3.2.3.2. If the HERS Rater verification procedure in Section RA3.2.3.2 is used for compliance, the system's thermostat shall conform to the specifications in Section
110.12. Ducted systems shall comply with the minimum system airflow rate requirement in Section 170.2(c)3BiaII.
For air-cooled air conditioners and air-source heat pumps, including but not limited to ducted split systems, ducted packaged systems, small duct high velocity systems and mini-split systems, which are of a type that cannot comply with the requirements of Section 170.2(c)3Bi:
The installer shall confirm the refrigerant charge using the weigh-in charging procedure specified in Reference Residential Appendix Section RA3.2.3.1, as verified by a HERS Rater according to the procedures specified in Reference Residential Appendix Section RA3.2.3.2; and
Systems that utilize forced air ducts shall comply with the minimum system airflow rate requirement in Section 170.2(c)3BiaII, provided the system is of a type that can be verified using the procedures in RA3.3 or an approved alternative procedure in RA1.
Exception 1 to Section 170.2(c)3Bi: Packaged systems for which the manufacturer has verified correct system refrigerant charge prior to shipment from the factory are not required to have refrigerant charge confirmed through field verification and diagnostic testing. The installer of these packaged systems shall certify that the packaged system was precharged at the factory and has not been altered in a way that would affect the charge. Ducted systems shall comply with minimum system airflow rate requirement in Section 170.2(c)3Bib, provided that the system is of a type that can be verified using the procedure specified in RA3.3 or an approved alternative in RA1.
Exception 2 to Section 170.2(c)3Bi: The HERS Rater field verification and HERS Provider data registry requirements of Reference Residential Appendix RA2 and RA3 are not required for multifamily dwelling units in buildings four habitable stories and greater. The installer shall certify that diagnostic testing was performed in accordance with the applicable procedures.
Space-conditioning distribution systems. All space-conditioning systems shall meet all applicable requirements of a or b below:
High performance attics. Air handlers or ducts are allowed to be in ventilated attic spaces when the roof and ceiling insulation level meet Option B in Table 170.2-A.
Duct and air handlers located in conditioned space. Duct systems and air handlers of HVAC systems shall be located in conditioned space, and confirmed by field verification and diagnostic testing to meet the criterion of Reference Residential Appendix RA3.1.4.3.8.
Note: Gas heating appliances installed in conditioned spaces must meet the combustion air requirements of California Mechanical Code Chapter 7, as applicable.
Central fan integrated ventilation systems—systems serving individual dwelling units. Central forced air system fans used to provide outside air shall have an air-handling unit fan efficacy less than or equal to the maximum W/cfm specified in a or b below. The airflow rate and fan efficacy requirements in this section shall be confirmed through field verification and diagnostic testing in accordance with all applicable procedures specified in Reference Residential Appendix RA3.3. Central Fan Integrated Ventilation Systems shall be certified to the Energy Commission as Intermittent Ventilation Systems as specified in Reference Residential Appendix RA3.7.4.2.
0.45 W/cfm for gas furnace air-handling units; or
0.58 W/cfm for air-handling units that are not gas furnaces.

Balanced ventilation systems. When balanced ventilation systems are used to meet Section 160.2(b)2Aivb, they shall meet the applicable requirements of a, b or c below:
In Climate Zones 1, 2 and 11–16, balanced ventilation systems serving individual dwelling units shall:
Be an energy recovery ventilator (ERV) or heat recovery ventilator (HRV),
Have a minimum sensible recovery efficiency of 67 percent, rated at 32 degrees Fahrenheit (0 degrees Celsius), and
Have a fan efficacy less than or equal to 0.6 W per cfm.
These measures shall be confirmed through HERS field verification in accordance with the procedures in RA3.7.4.4 for buildings with three habitable stories or less, or the procedures in NA2.2.4.1.5 for buildings with four or more habitable stories.
In Climate Zones 1, 2 and 11–16, balanced ventilation systems serving multiple dwelling units in buildings with four or more habitable stories shall:
Be an ERV or HRV,
Have a minimum sensible recovery efficiency or effectiveness of 67 percent, rated at 32 degrees Fahrenheit (0 degrees Celsius),
Meet the fan power requirements of Section 170.2(c)4A, and
Have recovery bypass or control to directly economize with ventilation air based on outdoor air temperature limits specified in Table 170.2-G.
These measures shall be filed verified in accordance with NA7.18.4.
In buildings with three habitable stories or less in Climate Zones 4–10, when a heat pump space- conditioning system is installed to meet the requirements of Section 170.2(c)3Ai, balanced ventilation systems without an ERV or HRV shall have a fan efficacy less than or equal to 0.4 W/cfm.
Exception to Section 170.2(c)3B: The HERS Rater field verification and HERS Provider data registry requirements of Reference Residential Appendix RA2 and RA3 are not required for multifamily dwelling units in buildings four habitable stories and greater. The installer shall certify that diagnostic testing was performed in accordance with the applicable procedures.
HVAC system bypass ducts. Bypass ducts that deliver conditioned supply air directly to the space-conditioning system return duct airflow shall not be used.
Common use area space-conditioning systems. A building complies with this section by being designed with and having constructed and installed a space-conditioning system that meets the applicable requirements of Subsections A through O.
Fan systems. Each fan system moving air into, out of, or between spaces or circulating air for the purpose of conditioning air within a space shall meet the requirements of Items i, ii and iii below.
Fan power budget. For each fan system that includes at least one fan or fan array with fan electrical input power ≥ 1 kW, fan system electrical input power (Fan kWdesign,system) determined per Section 170.2(c)4Aib at the fan system design airflow shall not exceed Fan kWbudget as calculated per Section 170.2(c)4Aia.
Calculation of fan power budget (Fan kWbudget). For each fan system:
Determine the fan system airflow and choose the appropriate table(s) for fan power allowance.
For single-cabinet fan systems, use the fan system airflow and the power allowances in both Tables 170.2-B and Table 170.2-C.
For supply-only fan systems, use the fan system airflow and power allowances in Table 170.2- B.

For relief fan systems, use the design relief airflow and the power allowances in Table 170.2-C.
For exhaust, return and transfer fan systems, use the fan system airflow and the power allowances in Table 170.2-C.
For complex fan systems, separately calculate the fan power allowance for the supply and return/exhaust systems and sum them. For the supply airflow, use supply airflow at the fan system design conditions, and the power allowances in Table 170.2-B. For the return/exhaust airflow, use return/exhaust airflow at the fan system design conditions, and the power allowances in Table 170.2-C.
For each fan system, determine the components included in the fan system and sum the fan power allowances of those components. All fan systems shall include the system base allowance. If, for a given component, only a portion of the fan system airflow passes through the component, calculate the fan power allowance for that component per this equation:

FPAadj

Q

comp

=	 FPAcomp
Qsys

Where:
FPAadj = The correct/ed fan power allowance for the component in w/cfm Qcomp = The airflow through component in cfm
Qsys = The fan system airflow in cfm
FPAcomp = The fan power allowance of the component from Table 170.2-B or Table 170.2-C
Multiply the fan system airflow by the sum of the fan power allowances for the fan system.
Divide by 1000 to convert to Fan kWbudget.
For building sites at elevations greater than 3,000 feet, multiply Fan kWbudget by the correction factor in Table 170.2-D.
Determining fan system electrical input power (Fan kWdesign,system). Fan kWdesign,system is the sum of Fan kWdesign for each fan or fan array included in the fan system with Fan kWdesign ≥ 1 kW. If variable speed drives are used, their efficiency losses shall be included. Fan input power shall be calculated with two times the clean filter pressure drop, which is the mean of the clean filter pressure drop and design final filter pressure drop. The Fan kWdesign for each fan or fan array shall be determined using one of the following methods. There is no requirement to use the same method for all fans in a fan system:
Use the default Fan kWdesign in Table 170.2-E-1 for one or more of the fans. This method cannot be used for complex fan systems.
Use the Fan kWdesign at fan system design conditions provided by the manufacturer of the fan, fan array, or equipment that includes the fan or fan array calculated per a test procedure included in USDOE 10 CFR Part 430, USDOE 10 CFR Part 431, ANSI/AMCA Standard 208-2018, ANSI/AMCA
Standard 210-2016, AHRI Standard 430-2020, AHRI Standard 440-2019 or ISO 5801-2017.
Use the Fan kWdesign provided by the manufacturer, calculated at fan system design conditions per one of the methods listed in Section 5.3 of ANSI/AMCA 208-2018.
Determine the Fan kWdesign by using the maximum electrical input power provided on the motor nameplate.
VAV systems.
Static pressure sensor location. Static pressure sensors used to control variable air volume fans shall be placed in a position such that the controller setpoint is no greater than one-third the total design fan static pressure, except for systems with zone reset control complying with Section 170.2(c)4Aiib. If this

results in the sensor being located downstream of any major duct split, multiple sensors shall be installed in each major branch with fan capacity controlled to satisfy the sensor furthest below its setpoint; and
Setpoint reset. For systems with direct digital control of individual zone boxes reporting to the central control panel, static pressure setpoints shall be reset based on the zone requiring the most pressure; i.e., the setpoint is reset lower until one zone damper is nearly wide open.
Fractional HVAC motors for fans. HVAC motors for fans that are less than 1 hp and 1/12 hp or greater shall be electronically commutated motors or shall have a minimum motor efficiency of 70 percent when rated in accordance with NEMA Standard MG 1-2006 at full load rating conditions. These motors shall also have the means to adjust motor speed for either balancing or remote control. Belt-driven fans may use sheave adjustments for airflow balancing in lieu of a varying motor speed.
Exception 1 to Section 170.2(c)4Aiii: Motors in fan-coils and terminal units that operate only when providing heating to the space served.
Exception 2 to Section 170.2(c)4Aiii: Motors in space-conditioning equipment certified under Section 110.1 or 110.2.
Exception 1 to 170.2(c)4A: Fan system power caused solely by process loads.
TABLE 170.2-B: Supply Fan Power Allowances (watts/cfm)
	Multi-Zone VAV Systems ≤5,000 cfm	Multi-Zone VAV Systems >5,000 and ≤10,000 cfm	Multi-Zone VAV Systems
>10,000 cfm	All Other Fan Systems ≤5,000 cfm	All Other Fan Systems >5,000 and ≤10,000 cfm	All Other Fan Systems >10,000 cfm	
Supply System Base Allowance for AHU Serving Spaces < 6 Floors Away.	0.395	0.453	0.413	0.232	0.256	0.236	
Supply System Base Allowance for AHU Serving Spaces > 6 Floors Away	0.508	0.548	0.501	0.349	0.356	0.325	
MERV 13 to MERV 16 Filter Upstream of Thermal Conditioning Equipment (two times the clean filter pressure drop)2	0.136	0.114	0.105	0.139	0.120	0.107	
MERV 13 to MERV 16 Final Filter Downstream of Thermal Conditioning Equipment. (two times the clean filter pressure drop) 2	0.225	0.188	0.176	0.231	0.197	0.177	
Filtration Allowance for > Merv 16 or HEPA Filter (two times the clean filter pressure drop) 2	0.335	0.280	0.265	0.342	0.292	0.264	
Central Hydronic Heating Coil Allowance	0.046	0.048	0.052	0.046	0.050	0.054	
Electric Heat Allowance	0.046	0.038	0.035	0.046	0.040	0.036	

TABLE 170.2-B: Supply Fan Power Allowances (watts/cfm) (Continued)
	Multi-Zone VAV Systems ≤5,000 cfm	Multi-Zone VAV Systems >5,000 and ≤10,000 cfm	Multi-Zone VAV Systems
>10,000 cfm	All Other Fan Systems ≤5,000 cfm	All Other Fan Systems >5,000 and ≤10,000 cfm	All Other Fan Systems >10,000 cfm	
Gas Heat Allowance	0.069	0.057	0.070	0.058	0.060	0.072	
Hydronic/DX Cooling Coil, or Heat Pump Coil (wet) Allowance	0.135	0.114	0.105	0.139	0.120	0.107	
Solid or Liquid Desiccant System Allowance	0.157	0.132	0.123	0.163	0.139	0.124	
Reheat Coil for Dehumidification Allowance	0.045	0.038	0.035	0.046	0.040	0.036	
Allowance for evaporative humidifier/cooler in series with a cooling coil. Value shown is allowed watts/cfm per 1.0 in. wg. Determine pressure loss (in. wg) at 400 fpm or maximum velocity allowed by the manufacturer, whichever is less. [Calculation required, see note 4]	0.224	0.188	0.176	0.231	0.197	0.177	
Allowance for 100% outdoor air system meeting the requirements of Note 5.	0.000	0.000	0.000	0.070	0.100	0.107	
Energy Recovery Allowance
for 0.50 ≤ ERR <0.55 6	0.135	0.114	0.105	0.139	0.120	0.107	
Energy Recovery Allowance
for 0.55 ≤ ERR <0.60 6	0.160	0.134	0.124	0.165	0.141	0.126	
Energy Recovery Allowance
for 0.60 ≤ ERR <0.65 6	0.184	0.155	0.144	0.190	0.163	0.146	
Energy Recovery Allowance
for 0.65 ≤ ERR <0.70 6	0.208	0.175	0.163	0.215	0.184	0.165	
Energy Recovery Allowance
for 0.70 ≤ ERR <0.75 6	0.232	0.196	0.183	0.240	0.205	0.184	
Energy Recovery Allowance
for 0.75 ≤ ERR <0.80 6	0.257	0.216	0.202	0.264	0.226	0.203	
Energy Recovery Allowance
for ERR ≥ 0.80 6	0.281	0.236	0.222	0.289	0.247	0.222	
Coil Runaround Loop	0.135	0.114	0.105	0.139	0.120	0.107	
Allowance for gas phase filtration required by code or accredited standard. Value shown is allowed w/cfm per
1.0 in. wg air pressure drop. [Calculation required, see note 4]	0.224	0.188	0.176	0.231	0.197	0.177	

TABLE 170.2-B: Supply Fan Power Allowances (watts/cfm) (Continued)
	Multi-Zone VAV Systems
≤5,000 cfm	Multi-Zone VAV Systems
>5,000 and
≤10,000 cfm	Multi-Zone VAV Systems
>10,000 cfm	All Other Fan Systems ≤5,000 cfm	All Other Fan Systems >5,000 and ≤10,000 cfm	All Other Fan Systems >10,000 cfm	
Economizer Return Damper	0.045	0.038	0.035	0.046	0.040	0.036	
Air Blender Allowance	0.045	0.038	0.035	0.046	0.040	0.036	
Allowance for sound attenuation section [fans serving spaces with design background noise goals below NC35].	0.034	0.029	0.026	0.035	0.030	0.027	
Deduction for systems that feed a terminal unit with a fan with electrical input power < 1kW.	-0.100	-0.100	-0.100	-0.100	-0.100	-0.100	
Low-turndown single-zone VAV fan systems meeting the requirements in note 7.	0.000	0.000	0.000	.070	0.100	0.089	
Footnote to TABLE 170.2-B
See FAN SYSTEM, MULTI-ZONE VARIABLE AIR VOLUME (VAV) in definition a Multi-Zone VAV System.
Filter fan power allowance can only be counted once per fan system.
RESERVED.
Power allowance requires further calculation by multiplying the actual in. wg. of the device/ component by the watts/ cfm in Table 170.2-B.
The 100% outdoor air system must serve 3 or more HVAC zones and airflow during non-economizer operating periods must not exceed 135% of minimum requirements in Section 120.1(c)(3).
Energy Recovery Ratio (ERR) calculated per ANSI/ASHRAE 84-2020.
A low-turndown single-zone VAV fan system must be capable of and configured to reduce airflow to 50 percent of design airflow and use no more than 30 percent of the design wattage at that airflow. No more than 10 percent of the design load served by the equipment shall have fixed loads.

TABLE 170.2-C: EXHAUST, RETURN, RELIEF, TRANSFER FAN POWER ALLOWANCES (WATT/CFM)

	Multi-Zone	Multi-Zone	Multi-Zone	All Other Fan	All Other Fan	All Other Fan	
	VAV Systems	VAV Systems	VAV Systems	Systems	Systems	Systems	
	≤5,000 cfm1	>5,000 and	>10,000 cfm1	≤5,000 cfm	>5,000 and	>10,000 cfm	
		≤10,000 cfm1			≤10,000 cfm		
Exhaust System Base Allowance	0.221	0.246	0.236	0.186	0.184	0.190	
Filter (any MERV value)2	0.046	0.041	0.036	0.046	0.041	0.035	
Energy Recovery Allowance for 0.50
≤ ERR <0.55 3	0.139	0.120	0.107	0.139	0.123	0.109	
Energy Recovery Allowance for 0.55
≤ ERR <0.60 3	0.165	0.142	0.126	0.165	0.144	0.128	
Energy Recovery Allowance for 0.60
≤ ERR <0.65 3	0.190	0.163	0.146	0.191	0.166	0.148	
Energy Recovery Allowance for 0.65
≤ ERR <0.70 3	0.215	0.184	0.165	0.216	0.188	0.167	
Energy Recovery Allowance for 0.70
≤ ERR <0.75 3	0.240	0.206	0.184	0.241	0.209	0.186	
Energy Recovery Allowance for 0.75
≤ ERR <0.80 3	0.265	0.227	0.203	0.266	0.231	0.205	
Energy Recovery Allowance for ERR
≥ 0.80 3	0.289	0.248	0.222	0.291	0.252	0.225	
Coil Runaround Loop	0.139	0.120	0.107	0.139	0.123	0.109	

TABLE 170.2-C: EXHAUST, RETURN, RELIEF, TRANSFER FAN POWER ALLOWANCES (WATT/CFM) (Continued)

	Multi-Zone VAV Systems
≤5,000 cfm1	Multi-Zone VAV Systems
>5,000 and
≤10,000 cfm1	Multi-Zone VAV Systems >10,000
cfm1	All Other Fan
Systems
≤5,000 cfm	All Other
Fan Systems
>5,000 and
≤10,000
cfm	All Other Fan
Systems
>10,000 cfm	
Return or exhaust systems required by code or accreditation standards to be fully ducted, or systems required to maintain air pressure differentials between adjacent rooms	0.116	0.100	0.089	0.116	0.102	0.091	
Return and/or exhaust airflow control devices required for space pressurization control	0.116	0.100	0.089	0.116	0.102	0.091	
Laboratory and vivarium exhaust systems in high- rise buildings for vertical duct exceeding 75 ft.
Value shown is allowed w/cfm per 0.25 in. wg for each 100 feet exceeding 75 feet. [Calculation required, see note 4]	0.058	0.051	0.045	0.058	0.052	0.046	
Biosafety cabinet. Value shown is allowed w/cfm per 1.0 in. wg air pressure drop. [Calculation required, see note 4]	0.231	0.198	0.177	0.232	0.202	0.179	
Exhaust filters, scrubbers, or other exhaust treatment required by code or standard. Value shown is allowed w/cfm per 1.0 in. wg air pressure drop. [Calculation required, see note 4]	0.231	0.198	0.177	0.232	0.202	0.179	
Sound attenuation section [Fans serving spaces with design background noise goals below NC35.]	0.035	0.030	0.027	0.035	0.031	0.028	
Footnote to TABLE 170.2-C:
For requirements to be classified as a Multi-Zone VAV System see definition for Multi-Zone Variable Air Volume Fan System.
Filter pressure loss can only be counted once per fan system.
Energy Recovery Ratio (ERR) calculated per ANSI/ASHRAE 84-2020.
Power allowance requires further calculation, multiplying the actual pressure drop (in. wg.) of the device/ component by the watts/cfm in the Table 170.2-C.

TABLE 170.2-D AIR DENSITY CORRECTION FACTORS

Altitude (ft)	Correction factor	
<3,000	1.000	
≥3,000 and <4,000	0.896	
≥4,000 and <5,000	0.864	
≥5,000 and <6,000	0.832	
≥6,000	0.801	

TABLE 170.2-E-1: Default values for Fan kWdesign Based on Motor Nameplate HP1,2
Motor Nameplate HP	Default Fan kWdesign with variable speed drive (Fan kWdesign)	Default Fan kWdesign without variable speed drive
(Fan kWdesign)	
<1	0.96	0.89	
≥1 and <1.5	1.38	1.29	
≥1.5 and <2	1.84	1.72	
≥2 and <3	2.73	2.57	
≥3 and <5	4.38	4.17	
≥5 and <7.5	6.43	6.15	
≥7.5 and <10	8.46	8.13	
≥10 and <15	12.47	12.03	
≥15 and <20	16.55	16.04	
≥20 and <25	20.58	19.92	
≥25 and <30	24.59	23.77	
≥30 and <40	32.74	31.70	
≥40 and <50	40.71	39.46	
≥50 and <60	48.50	47.10	
≥60 and <75	60.45	58.87	
≥75 and ≤100	80.40	78.17	
Footnote to TABLE 170.2-E-1:
This table cannot be used for Motor Nameplate Horsepower values greater than 100.
This table is to be used only with motors with a service factor ≤1.15. If the service factor is not provided, this table may not be used.

Space-conditioning zone controls. Each space-conditioning zone shall have controls designed in accordance with i or ii:
Each space-conditioning zone shall have controls that prevent:
Reheating; and
Recooling; and
Simultaneous provisions of heating and cooling to the same zone, such as mixing or simultaneous supply of air that has been previously mechanically heated and air that has been previously cooled either by cooling equipment or by economizer systems; or
Zones served by variable air-volume systems that are designed and controlled to reduce, to a minimum, the volume of reheated, recooled or mixed air are allowed only if the controls meet all of the following requirements:

For each zone with direct digital controls (DDC), the volume of primary air that is reheated, recooled or mixed air supply shall not exceed the larger of:
50 percent of the peak primary airflow; or
The design zone outdoor airflow rate as specified by Section 160.2(c)3.
The volume of primary air in the deadband shall not exceed the design zone outdoor airflow rate as specified by Section 160.2(c)3.
The first stage of heating consists of modulating the zone supply air temperature setpoint up to a maximum setpoint no higher than 95 F degrees F while the airflow is maintained at the deadband flow rate.
The second stage of heating consists of modulating the airflow rate from the deadband flow rate up to the heating maximum flow rate.
For each zone without DDC, the volume of primary air that is reheated, recooled or mixed air supply shall not exceed the larger of the following:
30 percent of the peak primary airflow; or
The design zone outdoor airflow rate as specified by Section 160.2(c)3.
Exception 1 to Section 170.2(c)4B: Zones with special pressurization relationships or cross-contamination control needs.
Exception 2 to Section 170.2(c)4B: Zones served by space-conditioning systems in which at least 75 percent of the energy for reheating, or providing warm air in mixing systems, is provided from a site-recovered or site- solar energy source.
Exception 3 to Section 170.2(c)4B: Zones in which specific humidity levels are required to satisfy exempt process loads. Computer rooms or other spaces where the only process load is from IT equipment may not use this exception.
Exception 4 to Section 170.2(c)4B: Zones with a peak supply-air quantity of 300 cfm or less.
Economizers.
Each cooling air handler that has a design total mechanical cooling capacity over 33,000 Btu/hr, or chilled- water cooling systems without a fan or that use induced airflow that has a cooling capacity greater than the systems listed in Table 170.2-E-2, shall include either:
An air economizer capable of modulating outside-air and return-air dampers to supply 100 percent of the design supply air quantity as outside air; or
A water economizer capable of providing 100 percent of the expected system cooling load, at outside air temperatures of 50°F dry-bulb and 45°F wet-bulb and below.
Exception 1 to Section 170.2(c)4Ci: Where special outside air filtration and treatment, for the reduction and treatment of unusual outdoor contaminants, makes compliance infeasible.
Exception 2 to Section 170.2(c)4Ci: Where the use of outdoor air for cooling will affect other systems, such as humidification or dehumidification, so as to increase overall building TDV energy use.
Exception 3 to Section 170.2(c)4Ci: Systems serving dwelling units.
Exception 4 to Section 170.2(c)4Ci: Where comfort cooling systems have the cooling efficiency that meets or exceeds the cooling efficiency improvement requirements in Table 170.2-F.
Exception 5 to Section 170.2(c)4Ci: Fan systems primarily serving computer rooms. See Section 140.9(a) for computer room economizer requirements.

TABLE 170.2-E-2 CHILLED WATER SYSTEM COOLING CAPACITY
Climate Zones	Total Building Chilled Water System Capacity, Minus Capacity of the Cooling units with Air Economizers	
	Building Water-Cooled Chilled Water System	Air-Cooled Chilled Water Systems or District Chilled Water Systems	
15	≥ 960,000 Btu/h (280 kW)	≥ 1,250,000 Btu/h (365 kW)	
1-14	≥720,000 Btu/h (210 kW)	≥940,000 Btu/h (275 kW)	
16	≥1,320,000 Btu/h (385 kW)	≥1,720,000 Bu/h (505 kW)	

TABLE 170.2-F ECONOMIZER TRADE-OFF TABLE FOR COOLING SYSTEMS
Climate Zone	Efficiency Improvement a	
1	70%	
2	65%	
3	65%	
4	65%	
5	70%	
6	30%	
7	30%	
8	30%	
9	30%	
10	30%	
11	30%	
12	30%	
13	30%	
14	30%	
15	30%	
16	70%	
Footnote to TABLE 170.2-F
a If a unit is rated with an annualized or part-load metric, then to eliminate the required economizer, only the annualized or part-load minimum cooling efficiency of the unit must be increased by the percentage shown. If the unit is only rated with a full load metric, like EER or COP cooling, then that metric must be increased by the percentage shown. To determine the efficiency required to eliminate economizer, when the unit equipment efficiency is rated with an energy-input divided by work-output metric, the metric shall first be converted to COP prior to multiplying by the efficiency improvement percentage and then converted back to the rated metric.

If an economizer is required by Section 170.2(c)4Ci, and an air economizer is used to meet the requirement, then it shall be:
Designed and equipped with controls so that economizer operation does not increase the building heating energy use during normal operation; and

Exception to Section 170.2(c)4Ciia: Systems that provide 75 percent of the annual energy used for mechanical heating from site-recovered energy or a site-solar energy source.
Capable of providing partial cooling even when additional mechanical cooling is required to meet the remainder of the cooling load.
Designed and equipped with a device type and high limit shut off complying with Table 170.2-G.

TABLE 170.2-G AIR ECONOMIZER HIGH LIMIT SHUT OFF CONTROL REQUIREMENTS
Device Typea	Climate Zones	Required High Limit (Economizer Off When):	Required High Limit (Economizer Off When):	
		Equationb	Description	
Fixed Dry Bulb	1, 3, 5, 11-16	TOA > 75°F	Outdoor air temperature exceeds 75°F	
Fixed Dry Bulb	2, 4, 10	TOA > 73°F	Outdoor air temperature exceeds 73°F	
Fixed Dry Bulb	6, 8, 9	TOA > 71°F	Outdoor air temperature exceeds 71°F	
Fixed Dry Bulb	7	TOA > 69°F	Outdoor air temperature exceeds 69°F	
Differential Dry Bulb	1, 3, 5, 11-16	TOA > TRA°F	Outdoor air temperature exceeds return air temperature	
Differential Dry Bulb	2, 4, 10	TOA > TRA-2°F	Outdoor air temperature exceeds return air temperature minus 2°F	
Differential Dry Bulb	6, 8, 9	TOA > TRA-4°F	Outdoor air temperature exceeds return air temperature minus 4°F	
Differential Dry Bulb	7	TOA > TRA-6°F	Outdoor air temperature exceeds return air temperature minus 6°F	
Fixed Enthalpyc +	All	hOA > 28 Btu/lbc or TOA >	Outdoor air enthalpy exceeds 28	
Fixed Drybulb		75°F	Btu/lb of dry airc or	
			Outdoor air temperature exceeds	
			75°F	
Footnote to TABLE 170.2-G:
a Only the high limit control devices listed are allowed to be used and at the setpoints listed. Others such as Dew Point, Fixed Enthalpy, Electronic Enthalpy, and Differential Enthalpy Controls, may not be used in any Climate Zone for compliance with Section 170.2(c)4Ci unless approval for use is provided by the Energy Commission Executive Director.
b Devices with selectable (rather than adjustable) setpoints shall be capable of being set to within 2°F and 2 Btu/lb of the setpoint listed.
c At altitudes substantially different than sea level, the Fixed Enthalpy limit value shall be set to the enthalpy value at 75°F and 50% relative humidity. As an example, at approximately 6,000 foot elevation, the fixed enthalpy limit is approximately
30.7 Btu/lb.
The air economizer and all air dampers shall have the following features:
Warranty. 5-year manufacturer warranty of economizer assembly.
Damper reliability testing. Suppliers of economizers shall certify that the economizer assembly, including but not limited to outdoor air damper, return air damper, drive linkage and actuator, has been tested and is able to open and close against the rated airflow and pressure of the system for 60,000 damper opening and closing cycles.
Damper leakage. Economizer outdoor air and return air dampers shall have a maximum leakage rate of 10 cfm/sf at 250 Pascals (1.0 in. of water) when tested in accordance with AMCA Standard 500-D. The economizer outside air and return air damper leakage rates shall be certified to the Energy Commission in accordance with Section 110.0.
Adjustable setpoint. If the high-limit control is fixed dry-bulb or fixed enthalpy + fixed dry-bulb then the control shall have an adjustable setpoint.

Sensor accuracy. Outdoor air, return air, mixed air and supply air sensors shall be calibrated within the following accuracies.
Drybulb and wetbulb temperatures accurate to ±2°F over the range of 40°F to 80°F;
Enthalpy accurate to ±3 Btu/lb over the range of 20 Btu/lb to 36 Btu/lb;
Relative humidity (RH) accurate to ±5 percent over the range of 20 percent to 80 percent RH.
Sensor calibration data. Data used for control of the economizer shall be plotted on a sensor performance curve.
Sensor high limit control. Sensors used for the high limit control shall be located to prevent false readings, including but not limited to being properly shielded from direct sunlight.
Relief air system. Relief air systems shall be capable of providing 100 percent outside air without over- pressurizing the building.
The space-conditioning system shall include the following:
Unit controls shall have mechanical capacity controls interlocked with economizer controls such that the economizer is at 100 percent open position when mechanical cooling is on and does not begin to close until the leaving air temperature is less than 45 degree F.
Direct Expansion (DX) units greater than 65,000 Btu/hr that control the capacity of the mechanical cooling directly based on occupied space temperature shall have a minimum of two stages of mechanical cooling capacity.
DX units not within the scope of Section 170.2(c)4Ciib shall (i) comply with the requirements in Table 170.2-H, and (ii) have controls that do not false load the mechanical cooling system by limiting or disabling the economizer or by any other means except at the lowest stage of mechanical cooling capacity.
TABLE 170.2-H DIRECT EXPANSION (DX) UNIT REQUIREMENTS FOR COOLING STAGES AND COMPRESSOR DISPLACEMENT
Cooling Capacity	Minimum Number of Mechanical Cooling Stages	Minimum Compressor Displacement	
≥ 65,000 Btu/h and
< 240,000 Btu/h	3 stages	≤ 35% full load	
≥ 240,000 Btu/h	4 stages	≤ 25% full load	
Systems that include a water economizer to meet Section 170.2(c)4Ci shall include the following:
Maximum pressure drop. Precooling coils and water-to-water heat exchangers used as part of a water economizer shall either have a waterside pressure drop of less than 15 feet of water, or a secondary loop shall be installed so that the coil or heat exchanger pressure drop is not contributing to pressure drop when the system is in the normal cooling (non-economizer) mode.
Economizer systems shall be integrated with the mechanical cooling system so that they are capable of providing partial cooling even when additional mechanical cooling is required to meet the remainder of the cooling load. Controls shall not false load the mechanical cooling system by limiting or disabling the economizer or by any other means, such as hot gas bypass, except at the lowest stage of mechanical cooling.
Supply air temperature reset controls. Space-conditioning systems supplying heated or cooled air to multiple zones shall include controls that automatically reset supply-air temperatures. Air distribution systems serving zones that are likely to have constant loads shall be designed for the air flows resulting from the fully reset supply air temperature. Supply air temperature reset controls shall be:
In response to representative building loads or to outdoor air temperature; and

At least 25 percent of the difference between the design supply-air temperature and the design room air temperature.
Exception 1 to Section 170.2(c)4D: Systems that meet the requirements of Section 170.2(c)3Bi, without using Exception 1 to that section.
Exception 2 to Section 170.2(c)4D: Where supply-air temperature reset would increase overall building energy use.
Exception 3 to Section 170.2(c)4D: Systems supplying zones in which specific humidity levels are required to satisfy process loads. Computer rooms or other spaces with only IT equipment may not use this exception.
Electric-resistance heating. Electric-resistance heating systems shall not be used for space heating.
Exception 1 to Section 170.2(c)4E: Where an electric-resistance heating system supplements a heating system in which at least 60 percent of the annual energy requirement is supplied by site-solar or recovered energy.
Exception 2 to Section 170.2(c)4E: Where an electric-resistance heating system supplements a heat pump heating system, and the heating capacity of the heat pump is more than 75 percent of the design heating load calculated in accordance with Section 170.2(c)1 at the design outdoor temperature specified in Section 170.2(c)2.
Exception 3 to Section 170.2(c)4E: Where the total capacity of all electric-resistance heating systems serving the entire building is less than 10 percent of the total design output capacity of all heating equipment serving the entire building.
Exception 4 to Section 170.2(c)4E: Where the total capacity of all electric-resistance heating systems serving the entire building, excluding those allowed under Exception 2, is no more than 3 kW.
Exception 5 to Section 170.2(c)4E: Heating systems serving as emergency backup to gas heating equipment.
Heat rejection systems. Heat rejection equipment used in comfort cooling systems such as air-cooled condensers, open cooling towers, closed-circuit cooling towers and evaporative condensers shall include the following:
Fan speed control. Each fan powered by a motor of 7.5 hp (5.6 kW) or larger shall have the capability to operate that fan at 2/3 of full speed or less, and shall have controls that automatically change the fan speed to control the leaving fluid temperature or condensing temperature or pressure of the heat rejection device.
Exception 1 to Section 170.2(c)4Fi: Heat rejection devices included as an integral part of the equipment listed in Table 110.2-A through Table 110.2-N.
Exception 2 to Section 170.2(c)4Fi: Condenser fans serving multiple refrigerant circuits.
Exception 3 to Section 170.2(c)4Fi: Condenser fans serving flooded condensers.
Exception 4 to Section 170.2(c)4Fi: Up to one-third of the fans on a condenser or tower with multiple fans where the lead fans comply with the speed control requirement.
Tower flow turndown. Open cooling towers configured with multiple condenser water pumps shall be designed so that all cells can be run in parallel with the larger of:
The flow that is produced by the smallest pump; or
50 percent of the design flow for the cell.
Limitation on centrifugal fan cooling towers. Open cooling towers with a combined rated capacity of 900 gpm and greater at 95°F condenser water return, 85°F condenser water supply and 75°F outdoor wet- bulb temperature shall use propeller fans and shall not use centrifugal fans.
Exception 1 to Section 170.2(c)4Fiii: Cooling towers that are ducted (inlet or discharge) or have an external sound trap that requires external static pressure capability.

Exception 2 to Section 170.2(c)4Fiii: Cooling towers that meet the energy efficiency requirement for propeller fan towers in Section 110.2, Table 110.2-F.
Multiple cell heat rejection equipment. Multiple cell heat rejection equipment with variable speed fan drives shall:
Operate the maximum number of fans allowed that comply with the manufacturer’s requirements for all system components, and
Control all operating fans to the same speed. Minimum fan speed shall comply with the minimum allowable speed of the fan drive as specified by the manufacturer’s recommendation. Staging of fans is allowed once the fans are at their minimum operating speed.
Cooling tower efficiency. Axial fan, open-circuit cooling towers serving condenser water loops for chilled water plants with a total of 900 gpm or greater shall have a rated efficiency of no less than 60 gpm/hp when rated in accordance with the conditions as listed in Table 110.2-F.
Exception 1 to Section 170.2(c)4Fv: Replacement of existing cooling towers that are inside an existing building or on an existing roof.
Exception 2 to Section 170.2(c)4Fv: Cooling towers serving buildings in Climate Zone 1 or 16.
Minimum chiller efficiency. Chillers shall meet or exceed Path B from Table 110.2-D.
Exception 1 to Section 170.2(c)4G: Chillers with electrical service > 600 V.
Exception 2 to Section 170.2(c)4G: Chillers attached to a heat recovery system with a design heat recovery capacity > 40 percent of the design chiller cooling capacity.
Exception 3 to Section 170.2(c)4G: Chillers used to charge thermal energy storage systems where the charging temperature is < 40°F.
Exception 4 to Section 170.2(c)4G: In buildings with more than three chillers, only three chillers are required to meet the Path B efficiencies.
Limitation of air-cooled chillers. Chilled water plants shall not have more than 300 tons provided by air- cooled chillers.
Exception 1 to Section 170.2(c)4H: Where the water quality at the building site fails to meet manufacturer’s specifications for the use of water-cooled chillers.
Exception 2 to Section 170.2(c)4H: Chillers that are used to charge a thermal energy storage system with a design temperature of less than 40°F (4°C).
Hydronic system measures.
Hydronic variable flow systems. HVAC chilled and hot water pumping shall be designed for variable fluid flow and shall be capable of reducing pump flow rates to no more than the larger of: a) 50 percent or less of the design flow rate; or b) the minimum flow required by the equipment manufacturer for the proper operation of equipment served by the system.
Exception 1 to Section 170.2(c)4I: Systems that include no more than three control valves.
Exception 2 to Section 170.2(c)4I: Systems having a total pump system power less than or equal to 1.5 hp.
Chiller isolation. When a chilled water system includes more than one chiller, provisions shall be made so that flow through any chiller is automatically shut off when that chiller is shut off while still maintaining flow through other operating chiller(s). Chillers that are piped in series for the purpose of increased temperature differential shall be considered as one chiller.
Boiler isolation. When a hot water plant includes more than one boiler, provisions shall be made so that flow through any boiler is automatically shut off when that boiler is shut off while still maintaining flow through other operating boiler(s).

Chilled and hot water temperature reset controls. Systems with a design capacity exceeding 500,000 Btu/hr supplying chilled or heated water shall include controls that automatically reset supply water temperatures as a function of representative building loads or outside air temperature.
Exception to Section 170.2(c)4Iiv: Hydronic systems that use variable flow to reduce pumping energy in accordance with Section 170.2(c)4Ii.
Water-cooled air conditioner and hydronic heat pump systems. Water circulation systems serving water-cooled air conditioners, hydronic heat pumps or both, that have total pump system power exceeding 5 hp, shall have flow controls that meet the requirements of Section 170.2(c)4Ivi. Each such air conditioner or heat pump shall have a two-position automatic valve interlocked to shut off water flow when the compressor is off.
Variable flow controls.
Variable speed drives. Individual pumps serving variable flow systems and having a motor horsepower exceeding 5 hp shall have controls or devices (such as variable speed control) that will result in pump motor demand of no more than 30 percent of design wattage at 50 percent of design water flow. The pumps shall be controlled as a function of required differential pressure.
Pressure sensor location and setpoint.
For systems without direct digital control of individual coils reporting to the central control panel, differential pressure shall be measured at the most remote heat exchanger or the heat exchanger requiring the greatest differential pressure.
For systems with direct digital control of individual coils with a central control panel, the static pressure setpoint shall be reset based on the valve requiring the most pressure, and the setpoint shall be no less than 80 percent open. Pressure sensors may be mounted anywhere.
Exception 1 to Section 170.2(c)4Ivi: Heating hot water systems.
Exception 2 to Section 170.2(c)4Ivi: Condenser water systems serving only water-cooled chillers.
Hydronic heat pump (WLHP) controls. Hydronic heat pumps connected to a common heat pump water loop with central devices for heat rejection and heat addition shall have controls that are capable of providing a heat pump water supply temperature deadband of at least 20°F between initiation of heat rejection and heat addition by the central devices.
Exception to Section 170.2(c)4Ivii: Where a system loop temperature optimization controller is used to determine the most efficient operating temperature based on real-time conditions of demand and capacity, deadbands of less than 20°F shall be allowed.
Reserved.
Fan control. Each cooling system listed in Table 170.2-H shall be designed to vary the indoor fan airflow as a function of load and shall comply with the following requirements:
DX and chilled water cooling systems that control the capacity of the mechanical cooling directly based on occupied space temperature shall (i) have a minimum of two stages of fan control with no more than 66 percent speed when operating on stage 1; and (ii) draw no more than 40 percent of the fan power at full fan speed, when operating at 66 percent speed.
All other systems, including but not limited to DX cooling systems and chilled water systems that control the space temperature by modulating the airflow to the space, shall have proportional fan control such that at 50 percent air flow the power draw is no more than 30 percent of the fan power at full fan speed.
Systems that include an air side economizer to meet Section 170.2(c)4Ci shall have a minimum of two speeds of fan control during economizer operation.
Exception to Section 170.2(c)4K: Modulating fan control is not required for chilled water systems with all fan motors <1 HP, or for evaporative systems with all fan motors < 1 HP, if the systems are not used to provide ventilation air and all indoor fans cycle with the load.

Mechanical system shut-off. Any directly conditioned common use area space with operable wall or roof openings to the outdoors shall be provided with interlock controls that disable or reset the temperature setpoint to 55°F for mechanical heating and disable or reset the temperature setpoint to 90°F for mechanical cooling to that space when any such opening is open for more than 5 minutes.
Exception 1 to Section 170.2(c)4L: Interlocks are not required on doors with automatic closing devices.
Exception 2 to Section 170.2(c)4L: Any space without a thermostatic control (thermostat or a space temperature sensor used to control heating or cooling to the space).
Exhaust system transfer air. Conditioned supply air delivered to any space with mechanical exhaust shall not exceed the greater of:
The supply flow required to meet the space heating or cooling load; or
The ventilation rate required by the authority having jurisdiction, the facility Environmental Health and Safety Department or Section 160.2(c)3; or
The mechanical exhaust flow minus the available transfer air. Available transfer air shall be from another conditioned space or return air plenums on the same floor and same smoke or fire compartment, and that at their closest point are within 15 feet of each other.
Exception 1 to Section 170.2(c)4M: Spaces that are required by applicable codes and standards to be maintained at a positive pressure differential relative to adjacent spaces.
Exception 2 to Section 170.2(c)4M: Spaces where the highest amount of transfer air that could be used for exhaust makeup may exceed the available transfer airflow rate and where the spaces have a required negative pressure relationship.
Dedicated outdoor air systems (DOAS). HVAC systems utilizing a dedicated outdoor air system (DOAS) to condition, temper or filter 100 percent outdoor air separate from local or central space-conditioning systems serving the same space shall meet the following criteria:
Provide each space with one of the following configurations:
A DOAS unit and a separate independent space-conditioning system in which the independent space- conditioning system complies with the economizer requirements specified by Section 170.2(c)4Ci and the DOAS unit complies with the exhaust air heat recovery requirements specified in Section 170.2(c)4N.
A DOAS unit that meets or exceeds the following criteria and a separate space cooling system:
Provides at least the minimum ventilation air flow rate as specified in Section 120.1(c)3 and provides no less than 0.3 cfm/ft2 during economizer operation.
Ventilation sensible energy recovery ratio of at least 60 percent or enthalpy recovery ratio of at least 50 percent at full flow cooling design conditions and heating design condition.
Energy recovery bypass or control to directly economize with ventilation air based on outdoor air temperature limits specified in Table 170.2-G.
DOAS units with airflow rate > 1,000 cfm must meet demand ventilation control requirements in accordance with Sections 160.2(c)5C, D and E.
Exception to Section 170.2(c)4Ni: Systems installed for the sole purpose of providing makeup air for exhausting toxic fumes, flammable materials, paint, corrosive fumes, dust, dryer exhaust, or commercial kitchen hoods used for collecting and removing grease vapors and smoke.
Ventilation fan systems shall be capable of modulating fan speed control.
Heating and cooling equipment fans, heating and cooling circulation pumps, and terminal unit fans shall cycle off, and terminal unit primary cooling air shall be shut off when there is no call for heating or cooling in the zone.

Exception to Section 170.2(c)4Niii: Fans used for heating and cooling using less than 0.12 watts per cfm may operate when space temperatures are within the thermostat deadband to provide destratification and air mixing in the space.
The DOAS supply air shall be delivered directly to the occupied space or downstream of the terminal heating or cooling coils.
Exception 1 to Section 170.2(c)4Niv: Active chilled beam systems.
Exception 2 to Section 170.2(c)4Niv: Sensible only cooling terminal units with pressure-independent variable-airflow regulating devices limiting the DOAS supply air to the greater of latent load or minimum ventilation requirements.
Exception 3 to Section 170.2(c)4Niv: Terminal heating or cooling units that comply with the low fan power allowance requirements in Exception to Section 170.2(c)4Niii.
DOAS with mechanical cooling providing ventilation to multiple zones and operating in conjunction with zone heating and cooling systems shall not use heating or heat recovery to warm supply air above 60°F when representative building loads or outdoor air temperature indicate that the majority of zones require cooling.
DOAS with a total fan system power less than 1 kW shall not exceed a total combined fan power of 1.0 W/cfm. DOAS with fan power greater than or equal to 1 kW shall meet the requirements of Section 170.2(c)4A.
Exhaust air heat recovery. Fan systems designed to operate to the criteria listed in either Table 170.2-I or Table 170.2-J shall include an exhaust air heat recovery system that meets the following:
A sensible energy recovery ratio of at least 60 percent or an enthalpy recovery ratio of at least 50 percent for both heating and cooling design conditions.
Energy recovery bypass or control to disable energy recovery and to directly economize with ventilation air based on outdoor air temperature limits specified in Table 170.2-G. For energy recovery systems where the transfer of energy cannot be stopped, bypass shall prevent the total airflow rate of either outdoor air or exhaust air through the energy recovery exchanger from exceeding 10 percent of the full design airflow rate.
For a DOAS unit and a separate independent space-conditioning system meeting the requirements of Section 170.2(c)4Nia, the design supply fan airflow rate shall be the total airflow of only the DOAS unit.
EXCEPTION 1 to Section 170.2(c)4Oii: DOAS units with the capability to shut off when a separate independent space-conditioning system meets the economizer requirements specified by section 170.2(c)4Cia is economizing.
Exception 1 to Section 170.2(c)4O: Systems meeting Section 140.9(c) prescriptive requirements for laboratory and factory exhaust systems.
Exception 2 to Section 170.2(c)4O: Systems serving spaces that are not cooled and that are heated to less than 60°F.
Exception 3 to Section 170.2(c)4O: Where more than 60 percent of the outdoor air heating energy is provided from site-recovered energy in Climate Zone 16.
Exception 4 to Section 170.2(c)4O: Sensible recovery ratio requirements at heating design conditions are exempted for Climate Zone 15.
Exception 5 to Section 170.2(c)4O: Sensible recovery ratio requirements at cooling design conditions are exempted for Climate Zone 1.
Exception 6 to Section 170.2(c)4O: Where the sum of the airflow rates exhausted and relieved within 20 feet of each other is less than 75 percent of the design outdoor airflow rate, excluding exhaust air that is either:
used for another energy recovery system;

not allowed by the California Mechanical Code (Title 24, Part 4) for use in energy recovery systems with leakage potential; or
of Class 4 as specified in Section 160.2(c)8.
Exception 7 to Section 170.2(c)4O: Systems expected to operate less than 20 hours per week.

TABLE 170.2-I: ENERGY RECOVERY REQUIREMENTS BY CLIMATE ZONE AND PERCENT OUTDOOR AIR AT FULL DESIGN AIRFLOW (<8,000 HOURS / YEAR)

% Outdoor Air at Full Design Airflow	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	
≥10% and <20%	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR	
≥20% and <30%	≥15,000	≥20,000	NR	NR	NR	NR	NR	NR	NR	NR	≥18,500	≥18,500	≥18,500	≥18,500	≥18,500	≥18,500	
≥30% and <40%	≥13,000	≥15,000	NR	NR	NR	NR	NR	NR	NR	NR	≥15,000	≥15,000	≥15,000	≥15,000	≥15,000	≥15,000	
≥40% and <50%	≥10,000	≥12,000	NR	NR	NR	NR	NR	NR	NR	≥22,000	≥10,000	≥10,000	≥10,000	≥10,000	≥10,000	≥10,000	
≥50% and <60%	≥9,000	≥10,000	NR	≥18,500	NR	NR	NR	NR	NR	≥17,000	≥8,000	≥8,000	≥8,000	≥8,000	≥8,000	≥8,000	
≥60% and <70%	≥7,000	≥7,500	NR	≥16,500	NR	NR	NR	NR	≥20,000	≥15,000	≥7,000	≥7,000	≥7,000	≥7,000	≥7,000	≥7,000	
≥70% and <80%	≥6,500	≥7,000	NR	≥15,000	NR	NR	NR	NR	≥17,000	≥14,000	≥5,000	≥5,000	≥5,000	≥5,000	≥5,000	≥5,000	
≥80%	≥4,500	≥6,500	NR	≥14,000	NR	NR	NR	NR	≥15,000	≥13,000	≥2,000	≥2,000	≥2,000	≥2,000	≥2,000	≥2,000	
FOOTNOTES TO TABLE 170.2-I:
Flow rates in Table 140.4-G represent the design supply fan airflow rate in CFM.
For a DOAS unit providing outdoor air to another space-conditioning system, the full design supply fan airflow rate shall be the total airflow of only the DOAS unit.

TABLE 170.2-J: ENERGY RECOVERY REQUIREMENTS BY CLIMATE ZONE AND PERCENT OUTDOOR AIR AT FULL DESIGN AIRFLOW (≥8,000 HOURS / YEAR)

%
Outdoor Air at Full Design Airflow	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	
≥10% and
<20%	≥10,000	≥10,000	NR	NR	NR	NR	NR	NR	NR	≥40,000	≥40,000	≥20,000	≥10,000	≥10,000	≥10,000	≥10,000	
≥20% and
<30%	≥2,000	≥5,000	≥13,000	≥9,000	≥9,000	NR	NR	NR	NR	≥15,000	≥15,000	≥5,000	≥5,000	≥5,000	≥5,000	≥5,000	
≥30% and
<40%	≥2,000	≥3,000	≥10,000	≥6,500	≥6,500	NR	NR	NR	≥15,000	≥7,500	≥7,500	≥3,000	≥3,000	≥3,000	≥3,000	≥3,000	
≥40% and
<50%	≥2,000	≥2,000	≥8,000	≥6,000	≥6,000	NR	NR	NR	≥12,000	≥6,000	≥6,000	≥2,000	≥2,000	≥2,000	≥2,000	≥2,000	

≥50% and
<60%	≥2,000	≥2,000	≥7,000	≥6,000	≥6,000	NR	NR	≥20,000	≥10,000	≥5,000	≥5,000	≥2,000	≥2,000	≥2,000	≥2,000	≥2,000	
≥60% and
<70%	≥2,000	≥2,000	≥6,000	≥6,000	≥6,000	NR	NR	≥18,000	≥9,000	≥4,000	≥4,000	≥2,000	≥2,000	≥2,000	≥2,000	≥2,000	
≥70% and
<80%	≥2,000	≥2,000	≥6,000	≥5,000	≥5,000	NR	NR	≥15,000	≥8,000	≥3,000	≥3,000	≥2,000	≥2,000	≥2,000	≥2,000	≥2,000	
≥80%	≥2,000	≥2,000	≥6,000	≥5,000	≥5,000	NR	NR	≥12,000	≥7,000	≥3,000	≥3,000	≥2,000	≥2,000	≥2,000	≥2,000	≥2,000	
Footnotes to TABLE 170.2-J:
Flow rates in Table 140.4-G represent the design supply fan airflow rate in CFM.
For a DOAS unit providing outdoor air to another space-conditioning system, the full design supply fan airflow rate shall be the total airflow of only the DOAS unit.

Water-heating systems. Water-heating systems shall meet the requirements of either 1, 2, 3 or 4.
For recirculation distribution systems serving individual dwelling units, only demand recirculation systems with manual on/off control as specified in the Reference Appendix RA4.4.9 shall be used. Recirculation system serving multiple dwelling units shall meet the requirements of Sections 110.3(c)2 and 110.3(c)5, and shall be capable of automatically controlling the recirculation pump operation based on measurement of hot water demand and hot water return temperature:
For systems serving individual dwelling units, the water-heating system shall meet the requirement of either A, B or C, or shall meet the performance compliance requirements of Section 170.1:
A single 240 volt heat pump water heater. In addition, meet the following:
A compact hot water distribution system as specified in Reference Appendix RA4.4.6 in climate zones 1 and 16; and
A drain water heat recovery system that is field verified as specified in the Reference Appendix RA3.6.9 in Climate Zone 16.
A single heat pump water heater that meets the requirements of NEEA Advanced Water Heater Specification Tier 3 or higher. In addition, for climate zone 16, a drain water heat recovery system that is field verified as specified in Reference Appendix RA3.6.9.
A gas or propane instantaneous water heater with an input of 200,000 Btu per hour or less and no storage tank.
For heat pump water-heating systems serving multiple dwelling units, the water-heating system shall be installed according to the manufacturer’s design and installation guidelines and meet the following requirements:
The hot water return from the recirculation loop shall connect to a recirculation loop tank and shall not directly connect to the primary heat pump water heater inlet or the primary thermal storage tanks.
The fuel source for the recirculation loop tank shall be electricity if auxiliary heating is needed. The recirculation loop heater shall be capable of multi- pass water-heating operation.

For systems with single pass primary heat pump water heater, the primary thermal storage tanks shall be piped in series if multiple tanks are used. For systems with multi-pass primary heat pump water heater, the primary thermal storage tanks shall be piped in parallel if multiple tanks are used.
The primary storage tank temperature setpoint shall be at least 135°F.
The recirculation loop tank temperature setpoint shall be at least 10°F lower than the primary thermal storage tank temperature setpoint such that hot water from the recirculation loop tank is used for the temperature maintenance load before engaging the recirculation loop tank heater.
The minimum heat pump water heater compressor cut-off temperature shall be equal to or lower than 40°F ambient air temperature.
A recirculation system.
Exception to Section 170.2(d)2G: Buildings with eight or fewer dwelling units.
Design documentation shall be provided in accordance with JA14.4.
For gas or propane systems serving multiple dwelling units, a central water-heating system that includes the following components shall be installed:
For Climate Zones 1 through 9, gas service water-heating systems with a total installed gas water-heating input capacity of 1 MMBtu/h or greater shall have gas service water-heating equipment with a minimum thermal efficiency of 90 percent. Multiple units are allowed to meet this requirement with an input capacity-weighted average of at least 90 percent.
Exception 1 to Section 170.2(d)3A: Individual gas water heaters with input capacity at or below 100,000 Btu/h shall not be included in the calculations of the total system input or total system efficiency.
Exception 2 to Section 170.2(d)3A: If 25 percent of the annual water-heating requirement is provided by site-solar energy or site-recovered energy.
A recirculation system.
Exception to Section 170.2(d)3B: Buildings with eight or fewer dwelling units.
A solar water-heating system meeting the installation criteria specified in Reference Residential Appendix RA4 and with a minimum solar savings fraction of either i or ii below:
A minimum solar savings fraction of 0.20 in Climate Zones 1 through 9 or a minimum solar savings fraction of 0.35 in Climate Zones 10 through 16; or
A minimum solar savings fraction of 0.15 in Climate Zones 1 through 9 or a minimum solar savings fraction of 0.30 in Climate Zones 10 through 16. In addition, a drain water heat recovery system that is field verified as specified in the Reference Appendix RA3.6.9.
A water-heating system serving multiple dwelling units determined by the Executive Director to use no more energy than the one specified in Subsection 1, 2 or 3 above.

TABLE 170.2-K MECHANICAL COMPONENT PACKAGE – Multifamily Standard Building Design
Multifamily	Climate Zone	
	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	
Unitary (serving one dwelling unit)	If Balanced Ventilation System1	HRV or ERV
Sensible Recovery Efficiency	0.67	0.67	NR	NR	NR	NR	NR	NR	NR	NR	0.67	0.67	0.67	0.67	0.67	0.67	
		HRV or ERV
Fan Efficacy (W/cfm)	0.6	0.6	1.0	1.0	1.0	1.0	1.0	1.0	1.0	1.0	0.6	0.6	0.6	0.6	0.6	0.6	
		Non-HRV or Non-ERV
Fan Efficacy (W/cfm)	NR	NR	NR	0.4	0.4	0.4	0.4	0.4	0.4	0.4	NR	NR	NR	NR	NR	NR	
	If Heat Pump, HSPF2/HSPF2	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	
	If Dual-Fuel Heat Pump, AFUE	MIN	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	MIN	
	Refrigerant Charge Verification or Fault Indicator Display	NR	REQ	NR	NR	NR	NR	NR	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	NR	
	SEER/SEER2	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	MIN	
Central (serving multiple dwelling units)	If Balanced Ventilation Systems1	Sensible Recovery Efficiency or Effectiveness	0.67	0.67	NR	NR	NR	NR	NR	NR	NR	NR	0.67	0.67	0.67	0.67	0.67	0.67	
		Bypass Function	REQ	REQ	NR	NR	NR	NR	NR	NR	NR	NR	REQ	REQ	REQ	REQ	REQ	REQ	
Central System Air Handlers	Central Fan Integrated Ventilation System Fan Efficacy	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	REQ	
Duct Insulation	Ducts in Unconditioned Space	R-8	R-8	R-6	R-8	R-6	R-6	R-6	R-8	R-8	R-8	R-8	R-8	R-8	R-8	R-8	R-8	
Water Heating	All Buildings	System Shall meet Section 170.2(d)	
Footnotes to TABLE 170.2-K:
Requirements only apply when using Balanced Ventilation to meet 160.2(b)2Aivb.
HSPF means "heating seasonal performance factor."
A supplemental heating unit may be installed in a space served directly or indirectly by a primary heating system, provided that the unit thermal capacity does not exceed 2 kilowatts or 7,000 Btu/hr and is controlled by a time-limiting device not exceeding 30 minutes.

2022 Building Energy Efficiency Standards	Page 459
Lighting. Dwelling unit lighting shall meet the applicable mandatory requirements of Section 160.5(a). Common use area lighting shall meet the following requirements:
Exception to Section 170.2(e): Common use areas providing shared provisions for living, eating, cooking or sanitation to dwelling units that would otherwise lack these provisions may instead comply with Section 160.5(a).
Interior common use area lighting. A building complies with Section 170.2(e)1 if:
The calculation of adjusted indoor lighting power of all proposed building areas combined, calculated under Subsection 170.2(e)2, is no greater than the calculation of allowed indoor lighting power, specific methodologies calculated under Subsection 170.2(e)4; and
The calculation of allowed indoor lighting power, general rules comply with Subsection 170.2(e)3.
The prescriptive limits on indoor lighting power are the smaller of the actual and allowed indoor lighting power values determined in accordance with Item i.
Calculation of Adjusted Indoor Lighting Power. The Adjusted Indoor Lighting Power of all proposed building areas is the total watts of all planned permanent and portable lighting systems in all areas of the proposed building; subject to the applicable adjustments under Subdivisions A through D of this subsection.
Two interlocked lighting systems: No more than two lighting systems may be used for an area, and if there are two they must be interlocked. Where there are two interlocked lighting systems, the watts of the lower wattage system may be excluded from the Adjusted Indoor Lighting Power if:
An installation certificate detailing compliance with Section 170.2(e)1A is submitted in accordance with Section 10-103 and Section 160.5(e); and
The area (or areas) served by the interlocking systems is an auditorium, a conference room, a multipurpose room or a theater; and
The two lighting systems are interlocked with a nonprogrammable double-throw switch to prevent simultaneous operation of both systems.
For compliance with Part 6, a nonprogrammable double-throw switch is an electrical switch commonly called a “single pole double throw” or “three-way” switch that is wired as a selector switch allowing one of two loads to be enabled. It can be a line voltage switch or a low voltage switch selecting between two relays. It cannot be overridden or changed in any manner that would permit both loads to operate simultaneously.
Reduction of wattage through controls. In calculating Adjusted Indoor Lighting Power, the installed watts of a luminaire providing general lighting in an area listed in Table 170.2-L may be reduced by the product of (i) the number of watts controlled as described in Table 170.2-L, times (ii) the applicable power adjustment factor (PAF), if all of the following conditions are met:
An installation certificate is submitted in accordance with Section 160.5(e)2; and
Luminaires and controls meet the applicable requirements of Section 110.9 and Sections 160.5(b) through 160.6; and
The controlled lighting is permanently installed general lighting systems and the controls are permanently installed nonresidential-rated lighting controls.
When used for determining PAFs for general lighting in offices, furniture mounted luminaires that comply with all of the following conditions shall qualify as permanently installed general lighting systems:
The furniture mounted luminaires shall be permanently installed no later than the time of building permit inspection; and
The furniture mounted luminaires shall be permanently hardwired; and

Page 460	2022 Building Energy Efficiency Standards
The furniture mounted lighting system shall be designed to provide indirect general lighting; and
Before multiplying the installed watts of the furniture mounted luminaire by the applicable PAF, 0.3 watts per square foot of the area illuminated by the furniture mounted luminaires shall be subtracted from installed watts of the furniture mounted luminaires; and
The lighting control for the furniture mounted luminaire complies with all other applicable requirements in Section 170.2(e)1Aii.
At least 50 percent of the light output of the controlled luminaire is within the applicable area listed in Table 170.2-L. Luminaires on lighting tracks shall be within the applicable area in order to qualify for a PAF.
Only one PAF from Table 170.2-L may be used for each qualifying luminaire. PAFs shall not be added together unless allowed in Table 170.2-L.
Only lighting wattage directly controlled in accordance with Section 170.2(e)1Aii shall be used to reduce the installed watts as allowed by Section 170.2(e)1Aii for calculating the Adjusted Indoor Lighting Power. If only a portion of the wattage in a luminaire is controlled in accordance with Section 170.2(e)1Aii, then only that portion of controlled wattage may be reduced in calculating Adjusted Indoor Lighting Power.
Lighting controls used to qualify for a PAF shall be designed and installed in addition to manual, multilevel and automatic lighting controls required in Section 160.5(b)4, and in addition to any other lighting controls required by any provision of Part 6. PAFs shall not be available for lighting controls required by Part 6.
To qualify for the PAF for daylight continuous dimming plus OFF control, the daylight control and controlled luminaires shall comply with Sections 160.5(b)4D, 160.5(e)1C and 160.5(e)1G, and the controls shall be continuous dimming and shall additionally turn lights completely OFF when the daylight available in the daylit zone is greater than 150 percent of the illuminance received from the general lighting system at full power. The PAF shall apply to the luminaires in the primary sidelit daylit zone, secondary sidelit daylit zone and skylit daylit zone.
To qualify for the PAF for an occupant sensing control controlling the general lighting in open plan office areas above workstations, in accordance with Table 170.2-L, the following requirements shall be met:
The open plan office area shall be greater than 250 square feet; and
This PAF shall be available only in office areas that contain workstations; and
Controlled luminaires shall only be those that provide general lighting directly above the controlled area, or furniture mounted luminaires that comply with Section 170.2(e)1Aii and provide general lighting directly above the controlled area; and
Qualifying luminaires shall be controlled by occupant sensing controls that meet all of the following requirements, as applicable:
Infrared sensors shall be equipped by the manufacturer, or fitted in the field by the installer, with lenses or shrouds to prevent them from being triggered by movement outside of the controlled area.
Ultrasonic sensors shall be tuned to reduce their sensitivity to prevent them from being triggered by movements outside of the controlled area.
All other sensors shall be installed and adjusted as necessary to prevent them from being triggered by movements outside of the controlled area.
To qualify for the PAF for an Institutional Tuning in Table 170.2-L, the tuned lighting system shall comply with all of the following requirements:

2022 Building Energy Efficiency Standards	Page 461
The lighting controls shall limit the maximum output or maximum power draw of the controlled lighting to 85 percent or less of full light output or full power draw; and
The means of setting the limit is accessible only to authorized personnel; and
The setting of the limit is verified by the acceptance test required by Section 160.5(e)1G; and
The construction documents specify which lighting systems shall have their maximum light output or maximum power draw set to no greater than 85 percent of full light output or full power draw.
To qualify for the PAF for a demand responsive control in Table 170.2-L, the general lighting wattage receiving the PAF shall not be within the scope of Section 110.12(c) and a demand responsive control shall meet all of the following requirements:
The controlled lighting shall be capable of being automatically reduced in response to a demand response signal; and
General lighting shall be reduced in a manner consistent with uniform level of illumination requirements in Table 160.5-B.
To qualify for the PAFs for clerestory fenestration, horizontal slats or light shelves in Table 170.2- L, the daylighting design shall meet the requirements in Section 140.3(d). The PAFs shall only apply to lighting in a primary or secondary sidelit daylit zone where continuous dimming daylighting controls meeting the requirements of Section 160.5(b)4D are installed.
Lighting wattage excluded. The watts of the following indoor lighting applications may be excluded from Adjusted Indoor Lighting Power:
Lighting installed by the manufacturer in walk-in coolers or freezers, vending machines and food preparation equipment.
Lighting that is required for exit signs subject to the CBC. Exit signs shall meet the requirements of the Appliance Efficiency Regulations.
Exit way or egress illumination that is normally off and that is subject to the CBC.
Temporary lighting systems.
Lighting systems in qualified historic buildings, as defined in the California Historical Building Code (Title 24, Part 8), are exempt from the lighting power density allowances if they consist solely of historic lighting components or replicas of historic lighting components. If lighting systems in qualified buildings contain some historic lighting components or replicas of historic components, combined with other lighting components, only those historic or historic replica components are exempt. All other lighting systems in qualified historic buildings shall comply with the lighting power density allowances.
Lighting for signs shall comply with Section 170.2(e)7.
Lighting in elevators where the lighting meets the requirements in Section 120.6(f).
Lighting connected to a Life Safety Branch or Critical Branch, as specified in Section 517 of the California Electrical Code.
Luminaire classification and power adjustment.
Luminaire classification and power shall be determined in accordance with Section 160.5(b)1.
Small Aperture Tunable-White and Dim-to-Warm Luminaires Lighting Power Adjustment. For qualifying small aperture tunable-white and dim-to-warm LED luminaires, the adjusted indoor lighting power of these luminaires shall be calculated by multiplying their maximum rated wattage by 0.75. Qualifying luminaires shall meet all of the following:

Page 462	2022 Building Energy Efficiency Standards
Small aperture. Qualifying luminaires with a luminaire aperture length longer than 18 inches shall have a luminaire aperture no wider than four inches. Qualifying luminaires with a luminaire aperture length of 18 inches or less shall have a luminaire aperture no wider than 8 inches.
Color changing. Qualifying tunable-white luminaires shall be capable of a color change greater than or equal to 2000 Kelvin correlated color temperature (CCT). Qualifying dim-to- warm luminaires shall be capable of color change greater than or equal to 500 Kelvin CCT.
Controls. Qualifying luminaires shall be connected to controls that allow color changing of the luminaires.
Tailored Method Display Lighting Mounting Height Lighting Power Adjustment. For wall display luminaires or floor display luminaires meeting the Tailored Method described in Sections 170.2(e)1Ciig and h and where the bottom of luminaires are 10 feet 7 inches and greater above the finished floor, the adjusted indoor lighting power of these luminaires shall be calculated by multiplying their maximum rated wattage and the appropriate mounting height adjustment factor from Table 170.2-O. Luminaire mounting height is the distance from the finished floor to the bottom of the luminaire. General lighting shall not qualify for a mounting height multiplier.
Calculation of allowed indoor lighting power: general rules.
The allowed indoor lighting power allotment for conditioned areas shall be calculated separately from the allowed lighting power allotment for unconditioned areas. Each allotment is applicable solely to the area to which it applies, and there shall be no trade-offs between conditioned and unconditioned area allotments.
The allowed indoor lighting power allotment shall be calculated separately from the allowed outdoor lighting power allotment. Each allotment is applicable solely to the area to which it applies, and there shall be no trade-offs between the separate indoor and outdoor allotments.
The allowed indoor lighting power allotment for general lighting shall be calculated as follows:
The Area Category Method, as described in Section 170.2(e)1Ci, shall be used either by itself for all common use areas in the building, or when some areas in the building use the Tailored Method described in Section 170.2(e)1Cii. Under the Area Category Method (either by itself or in conjunction with the Tailored Method), as described more fully in Section 170.2(e)1Ci, and subject to the adjustments listed there, the allowed indoor lighting power allotment for general lighting shall be calculated for each area in the building as follows:
For conditioned areas, by multiplying the conditioned square feet of the area times the applicable allotment of watts per square foot for the area shown in Table 170.2-M (or Table 170.2-N if the Tailored Method is used for that area).
For unconditioned areas, by multiplying the unconditioned square feet of the area times the applicable allotment of watts per square foot for the area shown in Table 170.2-M (or Table 170.2-N if the Tailored Method is used for that area).
The allowed indoor lighting power allotment for general lighting for one area for which the Area Category Method was used may be increased up to the amount that the allowed indoor lighting power allotment for general lighting for another area using the Area Category Method or Tailored Method is decreased, except that such increases and decreases shall not be made between conditioned and unconditioned space.
The Tailored Method, as described in Section 170.2(e)1Cii, shall be used either by itself for all areas in the building, or when some areas in the building use the Area Category Method described in Section 170.2(e)1Ci. Under the Tailored Method (either by itself or in conjunction with the Area Category Method) as described more fully in Section 170.2(e)1Cii, and subject to the adjustments listed there, allowed indoor lighting power allotment for general lighting shall be calculated for each area in the building as follows:

2022 Building Energy Efficiency Standards	Page 463
For conditioned areas, by multiplying the conditioned square feet of the area times the applicable allotment of watts per square foot for the area shown in Table 170.2-N (or Table 170.2-M if the Area Category Method is used for that area);
For unconditioned areas, by multiplying the unconditioned square feet of the area times the applicable allotment of watts per square foot for the area shown in Table 170.2-L (or Table 170.2- M if the Area Category Method is used for that area).
The allowed indoor lighting power allotment for general lighting for one area for which the Tailored Method was used may be increased up to the amount that the allowed indoor lighting power for general lighting for another area is decreased, but only if the Tailored Method or Area Category Method was used for the other area, except that such increases and decreases shall not be made between conditioned and unconditioned space.
If the Area Category Method is used for an area, the Tailored Method may not be used for that area. If the Tailored Method is used for an area, the Area Category Method may not be used for that area.
Calculation of allowed indoor lighting power: specific methodologies. The allowed indoor lighting power for each common use primary function area shall be calculated using only one of the methods in Subsection i, ii or iii below as applicable.
Area Category Method. Requirements for using the Area Category Method include all of the following:
The Area Category Method shall be used only for primary function areas, as defined in Section 100.1, that are listed in Table 170.2-M. For primary function areas not listed, selection of a reasonably equivalent type shall be permitted.
For purposes of compliance with Section 170.2(e)1Ci, an “area” shall be defined as all contiguous areas that accommodate or are associated with a single primary function area listed in Table 170.2-M.
Where areas are bounded or separated by interior partitions, the floor area occupied by those interior partitions may be included in a primary function area.
The allowed indoor lighting power for each primary function area is the Lighting Power Density value in Table 170.2-M times the square feet of the primary function area. The total allowed indoor lighting power for the building is the sum of all allowed indoor lighting power for all areas in the building.
In addition to the allowed indoor lighting power calculated according to Sections 170.2(e)1Cia through f, the building may add additional lighting power allowances for qualifying lighting systems as specified in the Qualifying Lighting Systems column in Table 170.2-M under the following conditions:
Only primary function areas having a lighting system as specified in the Qualifying Lighting Systems column in Table 170.2-M and in accordance with the corresponding footnote of the table shall qualify for the additional lighting power allowances; and
The additional lighting power allowances shall be used only if the plans clearly identify all applicable task areas and the lighting equipment designed to illuminate these tasks; and
Tasks that are performed less than two hours per day or poor quality tasks that can be improved are not eligible for the additional lighting power allowances; and
The additional lighting power allowances shall not utilize any type of luminaires that are used for general lighting in the building; and
The additional lighting power allowances shall not be used when using the Complete Building Method, or when the Tailored Method is used for any area in the building; and
The additional lighting power allowed is the smaller of:

the lighting power density listed in the “Allowed Additional Lighting LPD” column in Table 170.2-M, times the square feet of the primary function, or
the adjusted indoor lighting power of the applicable lighting; and
Tailored Method. Requirements for using the Tailored Method include all of the following:
The Tailored Method shall be used only for primary function areas listed in Table 170.2-N as defined in Section 100.1.
Allowed indoor lighting power allotments for general lighting shall be determined according to Section 170.2(e)1Ciif, as applicable.
For compliance with Section 170.2(e)1Cii, an “area” shall be defined as all contiguous areas that accommodate or are associated with a single primary function area listed in Table 170.2-N.
Where areas are bounded or separated by interior partitions, the floor area occupied by those interior partitions may be included in a primary function area.
In addition to the allowed indoor lighting power allotments for general lighting calculated according to Section 170.2(e)1Ciif, as applicable, the building may add additional lighting power allowances for wall display lighting, task lighting and decorative/special effects lighting, according to Sections 170.20(e)1Ciig through j.
Determine allowed indoor lighting power allotments for general lighting for primary function areas listed in Table 170.2-N as follows:
Use the general illumination level (lux) listed in column 2 of Table 170.2-N to determine the allowed general lighting power density allotments for the area.
Determine the room cavity ratio (RCR) for the area. The RCR shall be calculated according to the applicable equation in Table 170.2-P.
Find the allowed general lighting power density allotment in Table 170.2-Q that is applicable to the general illuminance level (lux) from column 2 of Table 170.2-N (as described in Item i) and the RCR determined in accordance with Table 170.2-P (as described in Item ii).
Determine the square feet of the area in accordance with Sections 170.2(e)1Ciic and d.
Multiply the allowed lighting power density allotment, as determined in accordance with Item iii by the square feet of each primary function area, as determined in accordance with Item iv. The product is the allowed indoor lighting power allotment for general lighting for the area.
Determine additional allowed power for wall display lighting according to column 3 of Table 170.2-N for each primary function area as follows:
Qualifying wall lighting shall:
Be mounted within 10 feet of the wall having the wall display. When track lighting is used for wall display, and where portions of that lighting track are more than 10 feet from the wall and other portions are within 10 feet of the wall, portions of track more than 10 feet from the wall shall not be used for the wall display allowance.
Be a lighting system type appropriate for wall lighting. Lighting systems appropriate for wall lighting are lighting track adjacent to the wall, wall-washer luminaires, luminaires behind a wall valance or wall cove, or accent light. (Accent luminaires are adjustable or fixed luminaires with PAR, R, MR or AR, or luminaires providing directional display light.)
Additional allowed power for wall display lighting is available only for lighting that illuminates walls having wall displays. The length of display walls shall include the length of the perimeter walls, including but not limited to closable openings and permanent full height interior partitions. Permanent full height interior partitions are those that (I) extend from the

floor to within two feet of the ceiling or are taller than ten feet and (II) are permanently anchored to the floor.
For wall display lighting where the bottom of the luminaire is greater than 10 feet 6 inches above the finished floor, the mounting height adjustment factor from Table 170.2-O can be used to adjust the installed luminaire wattage as specified in Section 170.2(e)1Aivc.
The allowed power for wall display lighting shall be the smaller of:
the “wall display lighting power density” determined in accordance with Table 170.2-N, multiplied by the wall display lengths determined in accordance with Item iii; and
The Adjusted Indoor Lighting Power used for the wall display lighting systems.
Lighting internal to display cases that are attached to a wall or directly adjacent to a wall are counted as wall display lighting as specified in Section 170.2(e)1Ciig. All other lighting internal to display cases is counted as floor display lighting.
Determine additional allowed power allotment for task lighting according to column 4 of Table 170.2-N for each primary function area as follows:
Additional allowed power for task lighting may be used by qualifying task lighting systems. For floor areas qualifying for task lighting power allowances, the additional allowed power shall be used only once for the same floor area, so that the allowance shall not be additive.
Qualifying task lighting shall:
Be located immediately adjacent to and capable of illuminating the task for which it is installed.
Be of a type different from the general lighting system.
Be separately switched from the general lighting system.
The square footage of task areas shall be determined in accordance with Sections 170.2(e)1ciic and d, except that any floor area designed to not have tasks, such as floor areas designated as a path of egress, shall not be included for the task lighting allowance.
The allowed power for task lighting for each applicable area shall be the smaller of:
The allowed task lighting power determined in accordance with Section 170.2(e)1ciih multiplied by the floor square footage determined in accordance with Section 170.2(e)1ciihIII; and
The adjusted indoor lighting power used for the task lighting systems.
Determine additional allowed power for decorative/special effects lighting for each primary function area as follows:
Qualifying decorative/special effects lighting includes luminaires such as chandeliers, sconces, lanterns, neon and cold cathode, light emitting diodes, theatrical projectors, moving lights and light color panels when any of those lights are used in a decorative manner that does not serve as display lighting or general lighting.
Additional lighting power for decorative/special effects lighting shall be used only if allowed by column 5 of Table 170.2-N.
Additional lighting power for decorative/special effects lighting shall be used only in areas having decorative/special effects lighting. The square footage of the floor area shall be determined in accordance with Sections 170.2(e)1Ciic and d, and it shall not include floor areas not having decorative/special effects lighting.
The additional allowed power for decorative/special effects lighting for each applicable area shall be the smaller of:

The product of the “allowed decorative/special effects lighting power” determined in accordance with Section 170.2(e)1CiikII, multiplied by the floor square footage determined in accordance with Section 170.2(e)1CiikIII; and
The adjusted indoor lighting power of allowed ornamental/special effects lighting.
LIGHTING POWER ADJUSTMENT FACTORS (PAF)
TYPE OF CONTROL	TYPE OF AREA	FACTOR	
1. Daylight Continuous Dimming plus OFF Control	Luminaires in skylit daylit zone or primary sidelit daylit zone	0.10	
2. Occupant Sensing Controls in Office Spaces larger than 250 square feet	In open plan offices > 250 square feet: One sensor controlling an area that is: No larger than 125 square feet	0.30	
	In open plan offices > 250 square feet: One sensor controlling an area that is: From 126 to 250 square feet	0.20	
3.Institutional Tuning	Luminaires in non-daylit areas.
Luminaires that qualify for other PAFs in this table may also qualify for this tuning PAF.	0.10	
	Luminaires in daylit areas.
Luminaires that qualify for other PAFs in this table may also qualify for this tuning PAF.	0.05	
4. Demand Responsive Control	General lighting luminaires not in the scope of Section 110.12(c). Luminaires that qualify for other PAFs in this table may also qualify for this demand responsive control PAF	0.05	
5. Clerestory Fenestration	Luminaires in daylit areas adjacent to the clerestory. Luminaires that qualify for daylight dimming plus OFF control may also qualify for this PAF.	0.05	
6. Horizontal Slats	Luminaires in daylit areas adjacent to vertical fenestration with interior or exterior horizontal slats. Luminaires that qualify for daylight dimming plus OFF control may also qualify for this PAF.	0.05	
7.Light Shelves	Luminaires in daylit areas adjacent to clerestory fenestration with interior or exterior light shelves. This PAF may be combined with the PAF for clerestory fenestration. Luminaires that qualify for daylight dimming plus OFF control may also qualify for this PAF	0.10	
Footnote to TABLE 170.2-L:
To qualify for any of the Power Adjustment Factors in this table, the installation shall comply with the applicable requirements in Section 170.2(e)1Aii
Only one PAF may be used for each qualifying luminaire unless combined below.
Lighting controls that are required for compliance with Part 6 shall not be eligible for a PAF

TABLE 170.2-M	AREA CATEGORY METHOD - LIGHTING POWER DENSITY VALUES (WATTS/FT²)
Primary Function Area	Allowed Lighting Power Density for General Lighting (W/ft2)	Additional Lighting Power
Qualified Lighting Systems	Additional Lighting Power
Additional Allowance (W/ft², unless noted otherwise)	
Storage	0.45	-	-	
Conference, Multipurpose and Meeting Area	0.75	Display/Decorative	0.30	
Copy Room	0.50	-	-	
Corridor Area	0.40	Decorative/Display	0.25	
Dining Area
Bar/Lounge and Fine Dining	0.45	Display/Decorative	0.35	
Dining Area Cafeteria/Fast Food	0.45	Display/Decorative	0.25	
Dining Area Family and Leisure	0.40	Display/Decorative	0.25	
Health Care / Assisted Living Nurse’s Station	0.75	Tunable white or dim- to-warm8	0.10	
Health Care / Assisted Living Physical Therapy Room	0.85	Tunable white or dim- to-warm8	0.10	
Kitchen/Food Preparation Area	0.95	-	-	
Electrical, Mechanical, Telephone Rooms	0.40	Detailed Task Work1	0.20	
Exercise/Fitness Center and Gymnasium Area	0.50	-	-	
Lobby, Main Entry	0.70	Display/Decorative	0.25	
Locker Room	0.45	-	-	
Lounge, Breakroom, or Waiting Area	0.55	Display/Decorative	0.25	
Concourse and Atria Area	0.60	Display/Decorative	0.25	

TABLE 170.2-M	AREA CATEGORY METHOD - LIGHTING POWER DENSITY VALUES (WATTS/FT²) (Continue)
Primary Function Area	Allowed Lighting Power Density for General Lighting (W/ft2)	Additional Lighting Power
Qualified Lighting Systems	Additional Lighting Power
Additional Allowance (W/ft², unless noted otherwise)	
Office Area	> 250 square feet	0.60	Decorative/Display and Portable lighting for office areas5	0.20	
Office Area	≤ 250 square feet	0.65	Decorative/Display and Portable lighting for office areas5	0.20	
Parking Garage Area	Parking Zone and Ramps	0.10	First ATM or Ticket Machine	100 W	
Parking Garage Area	Parking Zone and Ramps	0.10	Additional ATM or Ticket machine	50 W each	
Parking Garage Area	Daylight Adaptation Zones3	1.00	-	-	
Laundry Area	0.45	-	-	
Restrooms	0.65	Decorative/ Display	0.35	
Stairwell	0.60	Decorative/ Display	0.35	
All other	0.40	-	-	
Aging Eye/Low-vision6	Lobby, Main Entry	0.85	Display/Decorative	0.30	
Aging Eye/Low-vision6	Lobby, Main Entry	0.85	Transition Lighting OFF at night7	0.95	
Aging Eye/Low-vision6	Stairwell	0.80	Display/Decorative	0.30	
Aging Eye/Low-vision6	Corridor Area	0.70	Display/Decorative	0.30	
Aging Eye/Low-vision6	Lounge/Waiting Area	0.80	Display/Decorative	0.30	
Aging Eye/Low-vision6	Multipurpose Room	0.85	Display/Decorative	0.30	
Aging Eye/Low-vision6	Dining	0.80	Display/Decorative	0.30	
Aging Eye/Low-vision6	Restroom	1.00	Display/Decorative	0.20	
Footnotes for this table are listed below.
Detailed task work – Lighting provides high level of visual acuity required for activities with close attention to small elements and/or extreme close up work.
RESERVED
Daylight Adaptation Zones shall be no longer than 66 feet from the entrance to the parking garage.
RESERVED
Portable lighting in office areas includes under shelf or furniture-mounted supplemental task lighting qualifies when controlled by a time clock or an occupancy sensor.
Aging Eye/Low-vision areas can be documented as being designed to comply with the light levels in ANSI/IES RP- 28 and are or will be licensed by local or state authorities for either senior long-term care, adult day care, senior support, and/or people with special visual needs.
Transition lighting OFF at night. Lighting power controlled by astronomical time clock or other control to shut off lighting at night. Additional LPD only applies to area within 30 feet of an exit. Not applicable to lighting in daylit zones.
Tunable white luminaires capable of color change greater than or equal to 2000K CCT, or dim-to-warm luminaires capable of color change greater than or equal to 500K CCT, connected to controls that allows color changing of the luminaires.

TABLE 170.2-N	TAILORED METHOD LIGHTING POWER ALLOWANCES
1	2	3		5	
Primary Function Area	General Illumination Level (Lux)	Wall Lighting Power Density (W/ft)	Task Lighting Power Density (W/ft)	Allowed Decorative/ Special Effect Lighting
Power Density (W/ft²)	
Conference, Multipurpose, and Meeting Center Areas	300	2.00	0.25	0.35	
Dining Areas	200	1.25	0.25	0.35	
Lobby, Main Entry	200	3.50	0.25	0.35	

TABLE 170.2-O	TAILORED WALL AND FLOOR DISPLAY MOUNTING HEIGHT ADJUSTMENT FACTORSFACTORS
Height in feet above finished floor and bottom of luminaire(s)	Wall Display Mounting Height Adjustment Factor	
< 10’-7”	1.00	
10’-7” to 14’-0”	0.85	
>14’-0” to 18’-0”	0.75	
> 18’-0”	0.70	

Table 170.2-P	ROOM CAVITY RATIO (RCR) EQUATIONS
Determine the Room Cavity Ratio for Table 170.2-Q using one of the following equations.	
Room cavity ratio for rectangular rooms
5 × 𝐻𝐻 × (𝐿𝐿 + 𝑊𝑊)
𝑅𝑅𝑅𝑅𝑅𝑅 =
𝐿𝐿 × 𝑊𝑊	
Room cavity ratio for irregular-shaped rooms
2.5 × 𝐻𝐻 × 𝑃𝑃
𝑅𝑅𝑅𝑅𝑅𝑅 =
𝐴𝐴	
Where: L =Length of room; W = Width of room; H =Vertical distance from the work plane to the centerline of the lighting fixture; P = Perimeter of room, and A = Area of room	

TABLE 170.2-Q	TAILORED METHOD GENERAL LIGHTING POWER ALLOWED – BY ILLUMINANCE AND ROOM CAVITY RATIO
General Lighting Power Density (W/ft²) for the following RCR valuesb
General Illuminance Level
(lux)a	RCR ≤ 2.0	RCR > 2.0 and ≤ 3.5	RCR > 3.5 and ≤ 7.0	RCR > 7.0	
150	0.35	0.40	0.50	0.65	
200	0.40	0.50	0.65	0.85	
300	0.55	0.70	0.85	1.20	
400	0.65	0.80	1.05	1.25	
500	0.80	0.90	1.25	1.55	
600	0.90	1.05	1.40	2.00	
Footnotes to TABLE 170.2-Q
a Illuminance values from Column 2 of TABLE 170.2-N.
b RCR values are calculated using applicable equations in TABLE 170.2-P.

RESERVED.
Outdoor lighting.
A multifamily or mixed occupancy outdoor lighting installation complies with this section if it meets the requirements in Subsections 170.2(e)6B and C, and the actual outdoor lighting power installed is no greater than the allowed outdoor lighting power calculated under Subsection 170.2(e)6D. The allowed outdoor lighting shall be calculated according to outdoor lighting zone in Title 24, Part 1, Section 10-114.
Exceptions to Section 170.2(e)6A: When more than 50 percent of the light from a luminaire falls within one or more of the following applications, the lighting power for that luminaire shall be exempt from Section 170.2(e)6:
Temporary outdoor lighting.
Lighting required and regulated by the Federal Aviation Administration and the Coast Guard.
Lighting for public streets, roadways, highways and traffic signage lighting, including lighting for driveway entrances occurring in the public right-of-way owned or maintained by a local municipality or utility.
Lighting for sports and athletic fields, and children’s playgrounds.
Reserved.
Lighting of public monuments.
Lighting of signs complying with the requirements of Sections 160.5(d) and 170.2(e)7.
Lighting of stairs, wheelchair elevator lifts for American with Disabilities Act (ADA) compliance, and ramps that are other than parking garage ramps.
Landscape lighting.
Reserved.
Lighting for outdoor theatrical and other outdoor live performances, provided that these lighting systems are additions to area lighting systems and are controlled by a multiscene or theatrical cross-fade control station accessible only to authorized operators.
Outdoor lighting systems for qualified historic buildings, as defined in the California Historic Building Code (Title 24, Part 8), if they consist solely of historic lighting components or replicas of historic lighting components. If lighting systems for qualified historic buildings contain some historic lighting components or replicas of historic components, combined with other lighting components, only those historic or historic replica components are exempt. All other outdoor lighting systems for qualified historic buildings shall comply with Section 170.2(e)6.
Outdoor lighting power trade-offs. Outdoor lighting power trade-offs shall be determined as follows:
Allowed lighting power determined according to Section 170.2(e)6Di for general hardscape lighting allowance may be traded to specific applications in Section 170.2(e)6Dii, provided the hardscape area from which the lighting power is traded continues to be illuminated in accordance with Section 170.2(e)6Dia.
Allowed lighting power determined according to Section 170.2(e)2Dii for additional lighting power allowances for specific applications shall not be traded between specific applications, or to hardscape lighting in Section 170.2(e)6Di.
Trading off lighting power allowances between outdoor and indoor areas shall not be permitted.
Calculation of actual lighting power. The wattage of outdoor luminaires shall be determined in accordance with Section 160.5(b)1.

Calculation of allowed lighting power. The allowed lighting power shall be the combined total of the sum of the general hardscape lighting allowance determined in accordance with Section 170.2(e)2Di, and the sum of the additional lighting power allowance for specific applications determined in accordance with Section 170.2(e)6Dii.
General hardscape lighting allowance. Determine the general hardscape lighting power allowances as follows:
The general hardscape area of a site shall include parking lot(s), roadway(s), driveway(s), sidewalk(s), walkway(s), bikeway(s), plaza(s), bridge(s), tunnel(s) and other improved area(s) that are illuminated. Public roadway(s) that are illuminated by a lighting system owned or maintained by the local municipality or utility shall not be included in the area calculations. In plan view of the site, determine the illuminated hardscape area, which is defined as any hardscape area that is within a square pattern around each luminaire or pole that is ten times the luminaire mounting height with the luminaire in the middle of the pattern, less any areas that are within a building, beyond the hardscape area, beyond property lines or obstructed by a structure. The illuminated hardscape area shall include portions of planters and landscaped areas that are within the lighting application and are less than or equal to 10 feet wide in the short dimensions and are enclosed by hardscape or other improvement on at least three sides. Multiply the illuminated hardscape area by the Area Wattage Allowance (AWA) from Table 170.2-R for the appropriate lighting zone.
Determine the Initial Wattage Allowance (IWA) for general hardscape lighting from Table 170.2-R for the appropriate lighting zone. The hardscape area shall be permitted one IWA per site.
The general hardscape lighting allowance shall be the sum of the allowed watts determined from a and b above.
Additional lighting power allowance for specific applications. Additional lighting power for specific applications shall be the smaller of the additional lighting allowances for specific applications determined in accordance with Table 170.2-S for the appropriate lighting zone, or the actual installed lighting power meeting the requirements for the allowance.
TABLE 170.2-R GENERAL HARDSCAPE MULTIFAMILY LIGHTING POWER ALLOWANCE
Type of Power Allowance	Lighting Zone 02	Lighting Zone 12	Lighting Zone 22	Lighting Zone 32	Lighting Zone 42	
Area Wattage Allowance (AWA)	No allowance1	0.026 W/ft²	0.030 W/ft²	0.038 W/ft²	0.055 W/ft²	
Initial Wattage Allowance (IWA)	No allowance1	300 W	350 W	400 W	450 W	
Footnotes to TABLE 170.2-R
	Continuous lighting is explicitly prohibited in Lighting Zone 0. A single luminaire of 15 Watts or less may be installed at an entrance to a parking area, trail head, fee payment kiosk, outhouse, or toilet facility, as required to provide safe navigation of the site infrastructure. Luminaires installed shall meet the maximum zonal lumen limits as specified in Section 160.5(c)1.
	Narrow band spectrum light sources with a dominant peak wavelength greater than 580 nm – as mandated by local, state, or federal agencies to minimize the impact on local, active professional astronomy or nocturnal habitat of specific local fauna – shall be allowed a 2.0 lighting power allowance multiplier.

TABLE 170.2-S ADDITIONAL MULTIFAMILY LIGHTING POWER ALLOWANCE FOR SPECIFIC APPLICATIONS
All area and distance measurements in plan view unless otherwise noted.
Lighting Application	Lighting Zone 0	Lighting Zone 1	Lighting Zone 2	Lighting Zone 3	Lighting Zone 4	
	WATTAGE ALLOWANCE PER APPLICATION. Use all that apply as appropriate.	
Building Entrances or Exits. Allowance per door. Luminaires qualifying for this allowance shall be within 20 feet of the door.	Not applicable	9
watts	15
watts	19
watts	21
watts	
Primary Entrances to Senior Care Facilities Allowance per primary entrance(s) only. Primary entrances shall provide access for the general public and shall not be used exclusively for staff or service personnel. This allowance shall be in addition to the building entrance or exit allowance above. Luminaires qualifying for this allowance shall be within 100 feet of the primary entrance.	Not applicable	20
watts	40
watts	57
watts	60
watts	
ATM Machine Lighting. Allowance per ATM machine. Luminaires qualifying for this allowance shall be within 50 feet of the dispenser.	Not applicable	100 watts for first ATM machine, 35 watts for each additional ATM machine.	
	WATTAGE ALLOWANCE PER HARDSCAPE AREA (W/ft²). May be used for any illuminated hardscape area on the site.	
Hardscape Ornamental Lighting. Allowance for the total site illuminated hardscape area. Luminaires qualifying for this allowance shall be rated for 50 watts or less as determined in accordance with Section 160.5(b)1 and shall be post-top luminaires, lanterns, pendant luminaires, or chandeliers.	Not applicable	No Allowance	0.007
W/ft²	0.013
W/ft²	0.019
W/ft²	
	WATTAGE ALLOWANCE PER SPECIFIC AREA (W/ft²). Use as appropriate provided that none of the following specific applications shall be used for the same area.	
Building Facades. Only areas of building façade that are illuminated shall qualify for this allowance. Luminaires qualifying for this allowance shall be aimed at the façade and shall be capable of illuminating it without obstruction or interference by permanent building features or other objects. This allowance calculation shall not include portions of the building facades within 20 feet of residence bedroom windows.	Not applicable	No Allowance	0.100
W/ft²	0.170
W/ft²	0.225
W/ft²	
Canopies and Tunnels. Allowance for the total area within the drip line of the canopy or inside the tunnel. Luminaires qualifying for this allowance shall be located under the canopy or tunnel.	Not applicable	0.057
W/ft²	0.137
W/ft²	0.270
W/ft²	0.370
W/ft²	
	Student Pick-up/Drop-off zone. Allowance for the area of the student pick-up/drop-off zone, with or without canopy, for preschool through 12th grade school campuses. A student pick-up/drop off zone is a curbside, controlled traffic area on a school campus where students are picked-up and dropped off from vehicles. The allowed area shall be the smaller of the actual width or 25 feet, times the smaller of the actual length or 250 feet. Qualifying luminaires shall be within 2 mounting heights of the student pick-up/drop-off zone.	Not applicable	No Allowance	0.056
W/ft²	0.200
W/ft²	No Allowance	

	Outdoor Dining. Allowance for the total illuminated hardscape of outdoor dining. Outdoor dining areas are hardscape areas used to serve and consume food and beverages. Qualifying luminaires shall be within 2 mounting heights of the hardscape area of outdoor dining.	Not applicable	0.004
W/ft²	0.030
W/ft²	0.050
W/ft²	0.075
W/ft²	
	Special Security Lighting for Retail Parking and Pedestrian Hardscape. This additional allowance is for illuminated retail parking and pedestrian hardscape identified as having special security needs. This allowance shall be in addition to the building entrance or exit allowance.	Not applicable	0.004
W/ft²	0.005
W/ft²	0.010
W/ft²	No Allowance	
	Security Camera. This additional allowance is for the illuminated general hardscape area. This allowance shall apply when a security camera is installed within 2 mounting heights of the general hardscape area and mounted more than 10 feet away from a building.	Not applicable	No Allowance	0.018
W/ft²	0.018
W/ft²	0.018
W/ft²	
Requirements for signs. Section 170.2(e)7 applies to all internally illuminated and externally illuminated signs, unfiltered light emitting diodes (LEDs), and unfiltered neon, both indoor and outdoor. Each sign shall comply with either Subsection A or B, as applicable.
Maximum allowed lighting power.
For internally illuminated signs, the maximum allowed lighting power shall not exceed the product of the illuminated sign area and 12 watts per square foot. For double-faced signs, only the area of a single face shall be used to determine the allowed lighting power.
For externally illuminated signs, the maximum allowed lighting power shall not exceed the product of the illuminated sign area and 2.3 watts per square foot. Only areas of an externally lighted sign that are illuminated without obstruction or interference, by one or more luminaires, shall be used.
Lighting for unfiltered light emitting diodes (LEDs) and unfiltered neon shall comply with Section 170.2(e)7B.
Alternate lighting sources. The sign shall be equipped with one or more of the following light sources:
High pressure sodium lamps; or
Metal halide lamps that are:
Pulse start or ceramic served by a ballast that has a minimum efficiency of 88 percent or greater; or
Pulse start that are 320 watts or smaller, are not 250 watt or 175 watt lamps, and are served by a ballast that has a minimum efficiency of 80 percent.
Ballast efficiency is the reference lamp power divided by the ballast input power when tested according to ANSI C82.6-2015.
Neon or cold cathode lamps with transformer or power supply efficiency greater than or equal to the following:
A minimum efficiency of 75 percent when the transformer or power supply rated output current is less than 50 mA; or
A minimum efficiency of 68 percent when the transformer or power supply rated output current is 50 mA or greater.
The ratio of the output wattage to the input wattage is at 100 percent tubing load.
Fluorescent lighting systems meeting one of the following requirements:
Use only lamps with a minimum color rendering index (CRI) of 80; or

Use only electronic ballasts with a fundamental output frequency not less than 20 kHz.
Light emitting diodes (LEDs) with a power supply having an efficiency of 80 percent or greater; or
Exception to Section 170.2(e)7Bv: Single voltage external power supplies that are designed to convert 120 volt AC input into lower voltage DC or AC output, and have a nameplate output power less than or equal to 250 watts, shall comply with the applicable requirements of the Appliance Efficiency Regulations (Title 20).
Compact fluorescent lamps that do not contain a medium screw base socket (E24/E26).
Exception 1 to Section 170.2(e)7: Unfiltered incandescent lamps that are not part of an electronic message center (EMC), an internally illuminated sign or an externally illuminated sign.
Exception 2 to Section 170.2(e)7: Exit signs. Exit signs shall meet the requirements of the Appliance Efficiency Regulations.
Photovoltaic requirements—three habitable stories or fewer. All multifamily buildings up to three habitable stories shall have a newly installed photovoltaic (PV) system or newly installed PV modules meeting the minimum qualification requirements specified in Joint Appendix JA11. The annual electrical output of the PV system shall be no less than the smaller of a PV system size determined using Equation 170.2-C, or the maximum PV system size that can be installed on the building’s solar access roof area (SARA).
SARA includes the area of the building’s roof space capable of structurally supporting a PV system, and the area of all roof space on covered parking areas, carports, and all other newly constructed structures on the site that are compatible with supporting a PV system per Title 24, Part 2, Section 1511.2.
SARA does NOT include:
Any roof area that has less than 70 percent annual solar access. Annual solar access is determined by dividing the total annual solar insolation, accounting for shading obstructions, by the total annual solar insolation if the same areas were unshaded by obstructions. For steep-sloped roofs, only shading from existing permanent natural or manmade obstructions that are external to the dwelling, including but not limited to trees, hills and adjacent structures, shall be considered for annual solar access calculations. For low slope roofs, all obstructions including those that are external to the dwelling unit, and obstructions that are part of the building design and elevation features, shall be considered for the annual solar access calculations.
Occupied roof areas as specified by CBC Section 503.1.4.
Roof area that is otherwise not available due to compliance with other building code requirements if confirmed by the Executive Director.
EQUATION 170.2-C ANNUAL PHOTOVOLTAIC ELECTRICAL OUTPUT
kWPV = (CFA × A)/1000 + (NDU × B)
where:
kWPV = kWdc size of the PV system. CFA =	Conditioned floor area.
NDU =	Number of dwelling units.
A	=	CFA adjustment factor from Table 170.2-T.
B	=	Dwelling unit adjustment factor from Table 170.2-T.

Exception 1 to Section 170.2(f): For steep slope roofs, SARA shall not consider roof areas with a northerly azimuth that lies between 300 degrees and 90 degrees from true north. No PV system is required if the SARA is less than 80 contiguous square feet.
Exception 2 to Section 170.2(f): No PV system is required when the minimum PV system size specified by Section 170.2(f) is less than 1.8 kWdc.
Exception 3 to Section 170.2(f): Buildings with enforcement-authority-approved roof designs, where the enforcement authority determines it is not possible for the PV system, including panels, modules and components and supports and attachments to the roof structure, to meet the requirements of American Society of Civil Engineers (ASCE) Standard 7-16, Chapter 7, Snow Loads.
Exception 4 to Section 170.2(f): For buildings that are approved by the local planning department prior to January 1, 2020 with mandatory conditions of approval:
Shading from roof designs and configurations for steep slope roofs shall be considered for the annual solar access calculations; and
Roof areas that are not allowed to have PVs by the mandatory conditions of approval shall not be considered in determining the SARA.
Exception 5 to Section 170.2(f): PV system sizes determined using Equation 170.2-C may be reduced by 25 percent if installed in conjunction with a battery storage system. The battery storage system shall meet the qualification requirements specified in Joint Appendix JA12 and have a minimum usable capacity of 7.5 kWh.

TABLE 170.2-TCFA AND DWELLING UNIT ADJUSTMENT FACTORS
CLIMATE ZONE	A—CFA	B— DWELLING UNITS	
1	0.793	1.27	
2	0.621	1.22	
3	0.628	1.12	
4	0.586	1.21	
5	0.585	1.06	
6	0.594	1.23	
7	0.572	1.15	
8	0.586	1.37	
9	0.613	1.36	
10	0.627	1.41	
11	0.836	1.44	
12	0.613	1.40	
13	0.894	1.51	
14	0.741	1.26	
15	1.56	1.47	
16	0.59	1.22	

Photovoltaic requirements—more than three habitable stories. All newly constructed building types specified in Table 170.2-U, or mixed occupancy buildings where one or more of these building types constitute at least 80 percent of the floor area of the building, shall have a newly installed photovoltaic (PV) system meeting the minimum qualification requirements of Reference Joint Appendix JA11. The PV size in kWdc shall be not less than the smaller of the PV system size determined by Equation 170.2-D, or the total of all available Solar Access Roof Areas (SARA) multiplied by 14 W/ft².
SARA include the area of the building’s roof space capable of structurally supporting a PV system, and the area of all roof space on covered parking areas, carports and all other newly constructed structures on the site that are compatible with supporting a PV system per Title 24, Part 2, Section 1511.2.
SARA does not include:
Any area that has less than 70 percent annual solar access. Annual solar access is determined by dividing the total annual solar insolation (accounting for shading obstructions) by the total annual solar insolation if the same areas were unshaded by those obstructions. For all roofs, all obstructions

including those that are external to the building, and obstructions that are part of the building design and elevation features, may be considered for the annual solar access calculations.
Occupied roofs as specified by CBC Section 503.1.4.
Roof space that is otherwise not available due to compliance with other building code requirements if confirmed by the Executive Director.
EQUATION 170.2-D PHOTOVOLTAIC DIRECT CURRENT SIZE
kWPVdc = (CFA × A)/1000
where:
kWPVdc =  Size of the PV system in kW.
CFA	=  Conditioned floor area in square feet.
A	=  PV capacity factor specified in Table 170.2-U for the building type.
Where the building includes more than one of the space types listed in Table 170.2-U, the total PV system capacity for the building shall be determined by applying Equation 170.2-D to each of the listed space types and summing the capacities determined for each.
Exception 1 to Section 170.2(g): No PV system is required where the total of all available SARA is less than 3 percent of the conditioned floor area.
Exception 2 to Section 170.2(g): No PV system is required where the required PV system size is less than 4 kWdc.
Exception 3 to Section 170.2(g): No PV system is required if the SARA contains less than 80 contiguous square feet.
Exception 4 to Section 170.2(g): Buildings with enforcement-authority-approved roof designs, where the enforcement authority determines it is not possible for the PV system, including panels, modules, components, supports and attachments to the roof structure, to meet ASCE 7-16, Chapter 7, Snow Loads.
Exception 5 to Section 170.2(g): Multi-tenant buildings in areas where a load serving entity does not provide either a Virtual Net Metering (VNEM) or community solar program.

Table 170.2-U – PV Capacity Factors
Building Type	Factor A – Minimum PV Capacity (W/ft² of conditioned floor area)
Climate Zones
1, 3, 5, 16	Factor A – Minimum PV Capacity (W/ft² of conditioned floor area)
Climate Zones
2, 4, 6-14	Factor A – Minimum PV Capacity (W/ft² of conditioned floor area)
Climate Zone
15	
Grocery	2.62	2.91	3.53	
High-Rise Multifamily	1.82	2.21	2.77	
Office, Financial Institutions, Unleased Tenant Space	2.59	3.13	3.80	
Retail	2.62	2.91	3.53	
School	1.27	1.63	2.46	
Warehouse	0.39	0.44	0.58	
Auditorium, Convention Center, Hotel/Motel, Library, Medical Office Building/Clinic, Restaurant, Theater	0.39	0.44	0.58	

Battery storage system requirements—more than three habitable stories. All buildings that are required by Section 170.2(g) to have a PV system shall also have a battery storage system meeting the minimum qualification requirements of Reference Joint Appendix JA12. The rated energy capacity and the rated power capacity shall be not less than the values determined by Equation 170.2-E and Equation 170.2-F. Where the building includes more than one of the space types listed in Table 170.2-V, the total battery system capacity for the building shall be determined by applying Equations 170.2-E and 170.2-F to each of the listed space types and summing the capacities determined for each space type and equation.
EQUATION 170.2-E BATTERY STORAGE RATED ENERGY CAPACITY
kWhbatt = kWPVdc × B / D0.5 WHERE:
kWhbatt =  Rated usable energy capacity of the battery storage system in kWh.
kWPVdc  =  PV system capacity required by Section 170.2(g) in kWdc.
B	=	Battery energy capacity factor specified in Table 170.2-V for the building type.
D	= Rated single charge-discharge cycle AC to AC (round-trip) efficiency of the battery storage system.

EQUATION 170.2-F BATTERY STORAGE RATED POWER CAPACITY
kWbatt = kWPVdc × C WHERE:
kWbatt	=  Power capacity of the battery storage system in kWdc
kWPVdc  =  PV system capacity required by Section 170.2(g) in kWdc.
C	=  Battery power capacity factor specified in Table 170.2-V for the building type.
Exception 1 to Section 170.2(h): No battery storage system is required if the installed PV system size is less than 15 percent of the size determined by Equation 170.2-D.
Exception 2 to Section 170.2(h): No battery storage system is required in buildings with battery storage system requirements with less than 10 kWh rated capacity.

TABLE 170.2-V – Battery Storage Capacity Factors
	Factor B – Energy Capacity	Factor C – Power Capacity	
Storage-to-PV Ratio	Wh/W	W/W	
Grocery	1.03	0.26	
High-Rise Multifamily	1.03	0.26	
Office, Financial Institutions, Unleased Tenant Space	1.68	0.42	
Retail	1.03	0.26	
School	1.87	0.46	
Warehouse	0.93	0.23	
Auditorium, Convention Center, Hotel/Motel, Library, Medical Office Building/Clinic, Restaurant, Theater	0.93	0.23	
Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections
25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.8, and 25943, Public Resources Code.

SUBCHAPTER 12
MULTIFAMILY BUILDINGS - ADDITIONS, ALTERATIONS, AND REPAIRS TO EXISTING MULTIFAMILY BUILDINGS

SECTION 180.0 – GENERAL
Additions, alterations and repairs to existing attached dwelling units and common use areas in multifamily buildings, existing outdoor lighting for these occupancies, and internally and externally illuminated signs shall meet the requirements specified in Sections 100.0 through 110.10, 160.1, and 160.3 through 170.2 that are applicable to the building project, and either the performance compliance approach (energy budgets) in Section 180.1(b) (for additions) or 180.2(c) (for alterations), or the prescriptive compliance approach in Section 180.1(a) (for additions) or 180.2(b) (for alterations), for the climate zone in which the building is located. Climate zones are shown in Figure 100.1-A.
Covered process requirements for additions, alterations and repairs to existing multifamily buildings are specified in Section 141.1.
Nonresidential occupancies in mixed occupancy buildings shall comply with nonresidential requirements in Sections
120.0 through 141.1.
NOTE: For alterations that change the occupancy classification of the building, the requirements specified in Section 180.2 apply to the occupancy after the alterations.
NOTE: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code.
Reference: Sections 25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8 and
25943, Public Resources Code.

SECTION 180.1 – ADDITIONS
Additions to existing multifamily buildings shall meet the applicable requirements of Sections 110.0 through 110.9; Sections 160.0, 160.1, and 160.2(c) and (d); Sections 160.3 through 160.7; and either Section 180.1(a) or 180.1(b).
Exception 2 to Section 180.1: Additions of 300 square feet or less are exempt from the roofing product requirements of Section 170.2(a)1A.
Exception 3 to Section 180.1: Existing inaccessible piping shall not require insulation as defined under Section
160.4(f)2Aiii.
Exception 4 to Section 180.1: Space-conditioning system. When heating or cooling will be extended to an addition from the existing system(s), the existing heating and cooling equipment need not comply with Part 6. The heating system capacity must be adequate to meet the minimum requirements of CBC Section 1204.1.
Exception 5 to Section 180.1: Space-conditioning system ducts. When any length of duct is extended from an existing duct system to serve the addition, the existing duct system and the extended duct shall meet the applicable requirements specified in Sections 180.2(b)2Ai and 180.2(b)2Aii.
Exception 6 to Section 180.1: Photovoltaic and battery storage systems, as specified in Sections 170.2(f) through 170.2(h), are not required for additions.
Exception 7 to Section 180.1: Dwelling unit space heating system. New or replacement space heating systems serving an addition may be a heat pump or gas heating system.
Prescriptive approach. The envelope and lighting of the addition; any newly installed space-conditioning or ventilation system, electrical power distribution system, or water-heating system; any addition to an outdoor lighting system; and any new sign installed in conjunction with an indoor or outdoor addition shall meet the applicable requirements of Sections 110.0 through 110.12; 160.0, 160.1, and 160.2(c) and (d); and 160.3
through 170.2.
Envelope.
Additions that are greater than 700 square feet shall meet the requirements of Section 170.2(a), with the following modifications:
Framed walls extension. Extensions of existing wood-framed walls may retain the dimensions of the existing walls and shall install cavity insulation of R-15 in a 2x4 framing and R-21 in a 2x6 framing.
The maximum allowed fenestration area shall be the greater of 175 square feet or 20 percent of the addition floor area.
When existing siding of a wood-framed wall is not being removed or replaced, cavity insulation of R-15 in a 2x4 framing and R-21 in a 2x6 framing shall be installed and continuous insulation is not required.
Additions that consist of the conversion of existing spaces from unconditioned to conditioned space shall not be required to perform the air sealing part of QII when the existing air barrier is not being removed or replaced.
Additions that are 700 square feet or less shall meet the requirements of Section 170.2(a), with the following modifications.
Roof and ceiling insulation in a ventilated attic shall meet one of the following requirements:
In Climate Zones 1, 2, 4, and 8 through 16, achieve an overall assembly U-factor not exceeding 0.025. In wood framed assemblies, compliance with U-factors may be demonstrated by installing insulation with an R-value of R-38 or greater.

In Climate Zones 3 and 5 through 7, achieve an overall assembly U-factor not exceeding
0.031. In wood framed assemblies, compliance with U-factors may be demonstrated by installing insulation with an R-value of R-30 or greater.
Radiant barrier. For buildings three habitable stories or less, radiant barriers shall be installed in attics with exposed attic deck undersides in Climate Zones 2–15.
Extensions of existing wood-framed walls may retain the dimensions of the existing walls and shall install cavity insulation of R-15 in a 2x4 framing and R-21 in a 2x6 framing; and
Fenestration products must meet the U-factor, RSGHC and VT requirements of Table 180.2-B.
Quality Insulation Installation (QII) requirements of Section 170.2(a)6 do not apply.
Exception to Section 180.1(a)1B: Insulation in an enclosed rafter ceiling shall meet the requirements of Section 160.1(a).
Exception to Section 180.1(a)1: Additions that increase the area of the roof by 2,000 square feet or less are exempt from the solar ready requirements of Section 160.8.
Mechanical ventilation for indoor air quality. Additions to existing buildings shall comply with Section
160.2 subject to the requirements specified in Subsections A and B below. When HERS field verification and diagnostic testing are required by Section 180.1(a)2, buildings with three habitable stories or less shall use the applicable procedures in the Residential Appendices, and buildings with four or more habitable stories shall use the applicable procedures in Nonresidential Appendices NA1 and NA2.
Whole-dwelling unit mechanical ventilation.
Dwelling units that meet the conditions in Subsection a or b below shall not be required to comply with the whole-dwelling unit ventilation airflow specified in Section 160.2(b)2Aiv or 160.2(b)2Av.
Additions to an existing dwelling unit that increase the conditioned floor area of the existing dwelling unit by less than or equal to 1000 square feet.
Junior Accessory Dwelling Units (JADU) that are additions to an existing building.
Additions to an existing dwelling unit that increase conditioned floor area by more than 1,000 square feet shall have mechanical ventilation airflow in accordance with Section 160.2(b)2Aiv or 160.2(b)2Av, as applicable. The mechanical ventilation airflow rate shall be based on the conditioned floor area of the entire dwelling unit comprising the existing dwelling unit conditioned floor area plus the addition conditioned floor area.
New dwelling units that are additions to an existing building shall have mechanical ventilation airflow provided in accordance with Section 160.2(b)2Aiv or 160.2(b)2Av as applicable. The mechanical ventilation airflow rate shall be based on the conditioned floor area of the new dwelling unit.
Local mechanical exhaust. Additions to existing buildings shall comply with all applicable requirements specified in Sections 160.2(b)2Avi and 160.2(b)2B.
Water heater. When additional water-heating equipment is installed to serve a dwelling unit as part of the addition, one of the following types of water heaters shall be installed:
A water-heating system that meets the requirements of Section 170.2(d); or
A water-heating system determined by the Executive Director to use no more energy than the one specified in Item A above.
Performance approach. Performance calculations shall meet the requirements of Sections 170.0 through 170.2(a), pursuant to the applicable requirements in Items 1, 2 and 3 below.

For additions alone. The addition complies if the addition alone meets the energy budgets as specified in Section 170.1.
Existing plus alteration plus addition. The standard design for existing plus alteration plus addition energy use is the combination of the existing building’s unaltered components to remain; existing building altered components that are the more efficient, in TDV energy, of either the existing conditions or the requirements of Section 180.2(c); plus the proposed addition’s energy use meeting the requirements of Section 180.1(a). The proposed design energy use is the combination of the existing building’s unaltered components to remain and the altered components’ energy features, plus the proposed energy features of the addition.
Exception to Section 180.1(b)2: Existing structures with a minimum R-11 insulation in framed walls showing compliance with Section 180.1(b) are exempt from showing compliance with Section 160.1(b).
Mechanical ventilation for indoor air quality. Additions to existing buildings shall comply with Section
160.2 subject to the requirements specified in Subsections A and B below. When HERS field verification and diagnostic testing are required by Section 180.1(b)3, buildings with three habitable stories or less shall use the applicable procedures in the Residential Appendices, and buildings with four or more habitable stories shall use the applicable procedures in Nonresidential Appendices NA1 and NA2.
Whole-dwelling unit mechanical ventilation.
Dwelling units that meet the conditions in Subsection a or b below shall not be required to comply with the whole-dwelling unit ventilation airflow specified in Section 160.2(b)2Aiv or 160.2(b)2Av.
Additions to an existing dwelling unit that increase the conditioned floor area of the existing dwelling unit by less than or equal to 1000 square feet.
Junior Accessory Dwelling Units (JADU) that are additions to an existing building.
Additions to an existing dwelling unit that increase the conditioned floor area of the existing dwelling unit by more than 1,000 square feet shall have mechanical ventilation airflow in accordance with Section 160.2(b)2Aiv or 160.2(b)2Av as applicable. The mechanical ventilation airflow rate shall be based on the conditioned floor area of the entire dwelling unit comprised of the existing dwelling unit conditioned floor area plus the addition conditioned floor area.
New dwelling units that are additions to an existing building shall have mechanical ventilation airflow provided in accordance with Section 160.2(b)2Aiv or 160.2(b)2Av as applicable. The mechanical ventilation airflow rate shall be based on the conditioned floor area of the new dwelling unit.
Local Mechanical Exhaust. Additions to existing buildings shall comply with all applicable requirements specified in 160.2(b)2Avi and 160.2(b)2B.
NOTE: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code.
Reference: Sections 25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and
25943, Public Resources Code.

SECTION 180.2 – ALTERATIONS
Alterations to components of existing multifamily buildings, including alterations made in conjunction with a change in building occupancy to a multifamily occupancy, shall meet Item (a), and either Item (b) or (c) below:
Exception 1 to Section 180.2: When heating, cooling or service water heating for an alteration is provided by expanding existing systems, the existing systems and equipment need not comply with Sections 110.0 through 110.10; Sections 160.0 through 160.7; and Section 170.2(c) or 170.2(d).
Exception 2 to Section 180.2: When existing heating, cooling or service water-heating systems or components are moved within a building, the existing systems or components need not comply with Sections 110.0 through 110.10; Sections 160.0 through 160.7; and Section 170.2(c) or 170.2(d).
Exception 3 to Section 180.2: Where an existing system with electric reheat is expanded when adding variable air volume (VAV) boxes to serve an alteration, total electric reheat capacity may be expanded not to exceed 20 percent of the existing installed electric capacity in any one permit and the system need not comply with Section 170.2(b)4E. Additional electric reheat capacity in excess of 20 percent may be added subject to the requirements of Section 170.2(b)4E.
Exception 4 to Section 180.2: The requirements of Section 160.3(a)2H shall not apply to alterations of space- conditioning systems or components.
Mandatory requirements. Altered components in a multifamily building shall meet the minimum requirements in this section.
Roof/ceiling insulation. The opaque portions of the roof/ceiling that separate conditioned spaces from unconditioned spaces or ambient air shall meet the requirements of Section 180.2(b)1B.
Wall insulation. For the altered opaque portion of walls separating conditioned spaces from unconditioned spaces or ambient air shall meet the applicable requirements of Items A through D below:
Metal building. A minimum of R-13 insulation between framing members, or the area-weighted average U-factor of the wall assembly shall not exceed U-0.113.
Metal framed. A minimum of R-13 insulation between framing members, or the area-weighted average U-factor of the wall assembly shall not exceed U-0.217.
Wood framed and others. A minimum of R-11 insulation between framing members, or the area- weighted average U-factor of the wall assembly shall not exceed U-0.110.
Spandrel panels and curtain walls. A minimum of R-4, or the area-weighted average U-factor of the wall assembly shall not exceed U-0.280.
Exception to Section 180.2(a)2: Light and heavy mass walls.
Floor insulation. For the altered portion of raised floors that separate conditioned spaces from unconditioned spaces or ambient air shall meet the applicable requirements of Items A through B below:
Raised framed floors. A minimum of R-11 insulation between framing members, or the area-weighted average U-factor of the floor assembly shall not exceed U-0.071.
Raised mass floors. A minimum of R-6 insulation, or the area-weighted average U-factor of the floor assembly shall not exceed U-0.111.
Prescriptive approach. The altered component and any newly installed equipment serving the alteration shall meet the applicable requirements of Sections 110.0 through 110.9 and all applicable requirements of Sections 160.0, 160.1, 160.2(c) and (d), 160.3(a) through 160.3(b)5J, 160.3(b)6, 160.3(c) and 160.5; and

Envelope.
Roof alterations. Existing roofs being replaced, recovered or recoated of a multifamily building shall meet the requirements of Section 110.8(i). For roofs with more than 50 percent of the roof area or more than 2,000 square feet of roof, whichever is less, being altered, the requirements of i and iii below apply:
Low-sloped roofs in Climate Zones 2, 4, and 6 through 15 shall have a minimum aged solar reflectance of 0.63 and a minimum thermal emittance of 0.75, or a minimum SRI of 75.
Exception to Section 180.2(b)1Ai: The aged solar reflectance requirement can be met by using insulation at the roof deck specified in Table 180.2-A.

Table 180.2-A Roof/Ceiling Insulation Tradeoff for Low-Sloped Aged Solar Reflectance
Minimum Aged Solar Reflectance	Roof Deck Continuous Insulation R- value (Climate Zones 6-7)	Roof Deck Continuous Insulation R-value (Climate Zones 2, 4, 8-15)	
0.60	2	16	
0.55	4	18	
0.50	6	20	
0.45	8	22	
No requirement	10	24	

Steep-sloped roofs in Climate Zones 4 and 8 through 15 shall have a minimum aged solar reflectance of 0.20 and a minimum thermal emittance of 0.75, or a minimum SRI of 16.
Exception to Section 180.2(b)1Aii: The following shall be considered equivalent to Subsection ii:
Buildings with ceiling assemblies with a U-factor lower than or equal to 0.025 or that are insulated with at least R-38 ceiling insulation in an attic; or
Buildings with a radiant barrier in the attic, where the radiant barrier is not installed directly above spaced sheathing, meeting the requirements of Section 170.2(a)1C; or
Buildings that have no ducts in the attic in Climate Zones 2, 4, 9, 10, 12 and 14; or
Buildings with R-2 or greater continuous insulation above or below the roof deck.
Exception 1 to Sections 180.2(b)1Ai and ii: Roof area covered by building integrated photovoltaic panels and building integrated solar thermal panels is not required to meet the minimum requirements for solar reflectance, thermal emittance or SRI.
Exception 2 to Sections 180.2(b)1Ai and ii: Roof constructions with a weight of at least 25 lb/ft² are not required to meet the minimum requirements for solar reflectance, thermal emittance or SRI.
For low-sloped roofs, the area of the roof recover or roof replacement shall be insulated to R-14 continuous insulation or a U-factor of 0.039 in Climate Zones 1, 2, 4, and 8 through 16.
Exception 1 to Section 180.2(b)1Aiii: Roof recovers with new R-10 insulation added above deck do not need to be insulated to meet R-14.
Exception 2 to Section 180.2(b)1Aiii: When existing mechanical equipment located on the roof will not be disconnected and lifted, insulation added may be limited to the greater of R-10 or the maximum installed thickness that will allow the distance between the height of the roof membrane surface to the top of the base flashing to remain in accordance with the manufacturer’s instructions.

Exception 3 to Section 180.2(b)1Aiii: At the drains and other low points, tapered insulation with a thermal resistance less than R-14 may be used, provided that insulation thickness is increased at the high points of the roof so that the average thermal resistance equals or exceeds R-14.
Exception 4 to Section 180.2(b)1Aiii: The area of the roof recoat is not required to be insulated.
Roof/ceiling insulation.
Attic roof. Vented attics shall meet the following:
In Climate Zones 1 through 4 and 8 through 16, insulation shall be installed to achieve a weighted U-factor of 0.020 or insulation installed at the ceiling level shall result in an installed thermal resistance of R-49 or greater for the insulation alone; and
Exception to Section 180.2(b)1Bia: In Climate Zones 1, 3, 4 and 9, dwelling units with at least R-19 existing insulation installed at the ceiling level.
In Climate Zones 2 and 11 through 16, air seal all accessible areas of the ceiling plane between the attic and the conditioned space in accordance with Section 110.7; and
Exception 1 to Section 180.2(b)1Bib: Dwelling units with at least R-19 existing insulation installed at the ceiling level.
Exception 2 to Section 180.2(b)1Bib: Dwelling units with atmospherically vented space heating or water-heating combustion appliances located inside the pressure boundary of the dwelling unit.
In Climate Zones 1 through 4 and 8 through 16, recessed downlight luminaires in the ceiling shall be covered with insulation to the same depth as the rest of the ceiling. Luminaires not rated for insulation contact must be replaced or fitted with a fireproof cover that allows for insulation to be installed directly over the cover; and
Exception to Section 180.2(b)1Bic: In Climate Zones 1 through 4 and 8 through 10, dwelling units with at least R-19 existing insulation installed at the ceiling level.
Attic ventilation shall comply with the California Building Code requirements.
Exception 1 to Section 180.2(b)1Bi: Dwelling units with at least R-38 existing insulation installed at the ceiling level.
Exception 2 to Section 180.2(b)1Bi: Dwelling units where the alteration would directly cause the disturbance of asbestos unless the alteration is made in conjunction with asbestos abatement.
Exception 3 to Section 180.2(b)1Bi: Dwelling units with knob and tube wiring located in the vented attic.
Exception 4 to Section 180.2(b)1Bi: Where the accessible space in the attic is not large enough to accommodate the required R-value, the entire accessible space shall be filled with insulation, provided such installation does not violate Section 806.3 of Title 24, Part 2.5.
Exception 5 to Section 180.2(b)1Bi: Where the attic space above the altered dwelling unit is shared with other dwelling units and the requirements of Section 180.2(b)1Bi are not triggered for the other dwelling units.
Fenestration alterations other than repair shall meet the requirements below:
Note: Glass replaced in an existing sash and frame or sashes replaced in an existing frame are considered repairs. In these cases, Section 180.2(b) requires that the replacement be at least equivalent to the original in performance.
Fenestration products installed to replace existing fenestration products of the same total area shall meet either a or b:

The maximum U-factor, RSHGC and VT requirements of Table 180.2-B, or
The area-weighted U-factor and RSHGC of Table 170.2-A.
Exception 1 to Section 180.2(b)1Ci: In an alteration, where 150 square feet or less of the entire building's vertical fenestration is replaced, RSHGC and VT requirements of Table 180.2-B shall not apply.
Alterations that add fenestration and skylight area shall meet the total fenestration area requirements of Section 170.2(a) and the U-factor, RSHGC and VT requirements of Table 180.2-B.
Exception 1 to Section 180.2(b)1Cii: Alterations that add fenestration area of up to 50 square feet shall not be required to meet the total fenestration area requirements of Sections 170.2(a), nor the U-factor, RSHGC and VT requirements of Table 180.2-B.
Exception 2 to Section 180.2(b)1Cii: Alterations that add up to 16 square feet of new skylight area per dwelling unit with a maximum U-factor of 0.55 and a maximum RSHGC of 0.30 shall not be required to meet the total fenestration area requirements of Section 170.2(a)3.
Exterior doors. Alterations that add exterior door area shall meet the U-factor requirement of Section 170.2(a)4.

Table 180.2-B Altered Fenestration Maximum U-Factor and Maximum RSHGC
Climate Zone		1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	
Curtainwall / Storefront / Window Wall and Glazed
Doors1	U-factor	0.38	0.41	0.41	0.41	0.41	0.41	0.41	0.41	0.41	0.41	0.41	0.41	0.41	0.41	0.41	0.38	
Curtainwall / Storefront / Window Wall and Glazed
Doors1	RSHGC	0.35	0.26	0.26	0.26	0.26	0.26	0.26	0.26	0.26	0.26	0.26	0.26	0.26	0.26	0.26	0.25	
Curtainwall / Storefront / Window Wall and Glazed
Doors1	VT2	0.46	0.46	0.46	0.46	0.46	0.46	0.46	0.46	0.46	0.46	0.46	0.46	0.46	0.46	0.46	0.46	
NAFS 2017
Performance Class
AW Window – Fixed1	U-factor	0.38	0.38	0.38	0.38	0.38	0.47	0.47	0.41	0.41	0.38	0.38	0.38	0.38	0.38	0.38	0.38	
NAFS 2017
Performance Class
AW Window – Fixed1	RSHGC	0.35	0.25	0.25	0.25	0.25	0.31	0.31	0.26	0.26	0.25	0.25	0.25	0.25	0.25	0.25	0.25	
NAFS 2017
Performance Class
AW Window – Fixed1	VT2	0.37	0.37	0.37	0.37	0.37	0.37	0.37	0.37	0.37	0.37	0.37	0.37	0.37	0.37	0.37	0.37	
NAFS 2017
Performance Class AW Window –
Operable1	U-factor	0.43	0.43	0.43	0.43	0.43	0.47	0.47	0.43	0.43	0.43	0.43	0.43	0.43	0.43	0.43	0.43	
NAFS 2017
Performance Class AW Window –
Operable1	RSHGC	0.35	0.24	0.24	0.24	0.24	0.31	0.31	0.24	0.24	0.24	0.24	0.24	0.24	0.24	0.24	0.24	
NAFS 2017
Performance Class AW Window –
Operable1	VT2	0.37	0.37	0.37	0.37	0.37	0.37	0.37	0.37	0.37	0.37	0.37	0.37	0.37	0.37	0.37	0.37	
All Other Windows
and Glazed Doors1	U-factor	0.30	0.30	0.30	0.30	0.30	0.30	0.34	0.30	0.30	0.30	0.30	0.30	0.30	0.30	0.30	0.30	
All Other Windows
and Glazed Doors1	RSHGC	0.35	0.23	0.23	0.23	0.23	0.23	0.23	0.23	0.23	0.23	0.23	0.23	0.23	0.23	0.23	0.23	
Skylights, 3 habitable
stories and fewer	U-factor	0.30	0.30	0.30	0.30	0.30	0.30	0.30	0.30	0.30	0.30	0.30	0.30	0.30	0.30	0.30	0.30	
Skylights, 3 habitable
stories and fewer	RSHGC	NA	0.23	NA	0.23	NA	0.30	0.30	0.30	0.30	0.30	0.30	0.30	0.30	0.30	0.30	NA	

Page 489

Table 180.2-B Altered Fenestration Maximum U-Factor and Maximum RSHGC (Continue)
Skylights, 4 habitable
stories and greater	U-factor	0.46	0.46	0.46	0.46	0.46	0.46	0.46	0.46	0.46	0.46	0.46	0.46	0.46	0.46	0.46	0.46	
Skylights, 4 habitable
stories and greater	RSHGC	0.35	0.25	0.25	0.25	0.25	0.25	0.25	0.25	0.25	0.25	0.25	0.25	0.25	0.25	0.25	0.25	
Skylights, 4 habitable
stories and greater	VT2	0.49	0.49	0.49	0.49	0.49	0.49	0.49	0.49	0.49	0.49	0.49	0.49	0.49	0.49	0.49	0.49	
Footnotes to TABLE 180.2-B
For fenestration installed in buildings with three or fewer habitable stories, there is no SHGC requirement in Climate Zones 1, 3, 5, and 16.
Minimum VT requirements to not apply to multifamily buildings 3 habitable stories or less.

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Space-conditioning systems.
Space-conditioning systems serving dwelling units.
Entirely new or complete replacement space-conditioning systems installed as part of an alteration shall include all the system heating or cooling equipment, including but not limited to: condensing unit, cooling or heating coil, and air handler for split systems; or complete replacement of a packaged unit; plus entirely new or replacement duct system [Section 180.2(b)2Aiib]. Entirely new or complete replacement space-conditioning systems shall meet the requirements of Sections 160.2(a)1, 160.3(a)1, 160.3(b)1 through 3, 160.3(b)5, 160.3(b)6, 160.3(c)1, 170.2(c)3B 180.2(b)2Av, and Table 180.2-C.
Altered duct systems—duct sealing: In all climate zones, when more than 25 feet of new or replacement space-conditioning system ducts are installed, the ducts shall comply with the applicable requirements of Subsections a and b below. New ducts located in unconditioned space shall meet the applicable requirements of Sections 160.3(b)5A through J and the duct insulation requirements of Table 180.2-C, and
The altered duct system, regardless of location, shall be sealed as confirmed through field verification and diagnostic testing in accordance with all applicable procedures for duct sealing of altered existing duct systems as specified in Reference Residential Appendix RA3.1, utilizing the leakage compliance criteria specified in Subsection I or II below.
TABLE 180.2-C DUCT INSULATION R-VALUE
Climate Zone	3, 5 through 7	1, 2, 4, 8 through 16	
Duct R-Value	R-6	R-8	

Entirely new or complete replacement duct system. If the new ducts form an entirely new or complete replacement duct system directly connected to the air handler, the duct system shall meet one of the following requirements:
The total leakage of the duct system shall not exceed 12 percent of the air handler airflow as determined utilizing the procedures in Reference Residential Appendix Section RA3.1.4.3.1, or
The duct system leakage to outside shall not exceed 6 percent of the air handler airflow as determined utilizing the procedures in Reference Residential Appendix Section RA3.1.4.3.4.
Entirely new or complete replacement duct systems installed as part of an alteration are constructed of at least 75 percent new duct material, and up to 25 percent may consist of reused parts from the dwelling unit's existing duct system, including but not limited to registers, grilles, boots, air handler, coil, plenums and duct material, if the reused parts are accessible and can be sealed to prevent leakage.
Entirely new or complete replacement duct systems shall also conform to the requirements of Sections 160.2(a)1 and 160.3(b)5L. If the air handler and ducts are located within a vented attic, the requirements of Section 180.2(b)1Bi shall also be met.
Extension of an existing duct system. If the new ducts are an extension of an existing duct system serving multifamily dwellings, the combined new and existing duct system shall meet one of the following requirements:
The measured duct leakage shall be equal to or less than 15 percent of air handler airflow as confirmed by field verification and diagnostic testing utilizing the procedures in Reference Residential Appendix Section RA3.1.4.3.1; or

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The measured duct leakage to outside shall be equal to or less than 10 percent of air handler airflow as confirmed by field verification and diagnostic testing utilizing the procedures in Reference Residential Appendix Section RA3.1.4.3.4; or
If it is not possible to meet the duct sealing requirements of either Section 180.2(b)2AiicI or II then all accessible leaks shall be sealed and verified through a visual inspection and a smoke test by a certified HERS Rater utilizing the methods specified in Reference Residential Appendix RA3.1.4.3.5.
Exception to Section 180.2(b)2AiiaII: duct sealing. Existing duct systems that are extended, which are constructed, insulated or sealed with asbestos.
Exception 1 to 180.2(b)2Aii: The HERS Rater field verification and HERS Provider data registry requirements of Reference Residential Appendix RA2 and RA3 are not required for multifamily dwelling units in buildings four stories and greater. The installer shall certify that diagnostic testing was performed in accordance with the applicable procedures.
Altered space-conditioning system—duct sealing. In all climate zones, when a space-conditioning system serving a multifamily dwelling is altered by the installation or replacement of space- conditioning system equipment, including replacement of the air handler, outdoor condensing unit of a split system air conditioner or heat pump, or cooling or heating coil, the duct system that is connected to the altered space-conditioning system equipment shall be sealed, as confirmed through field verification and diagnostic testing in accordance with the applicable procedures for duct sealing of altered existing duct systems as specified in Reference Residential Appendix RA3.1 and the leakage compliance criteria specified in Subsection a, b or c below.
The measured duct leakage shall be equal to or less than 15 percent of air handler airflow as determined utilizing the procedures in Reference Residential Appendix Section RA3.1.4.3.1; or
The measured duct leakage to outside shall be equal to or less than 10 percent of air handler airflow as determined utilizing the procedures in Reference Residential Appendix Section RA3.1.4.3.4; or
If it is not possible to meet the duct sealing requirements of either Section 180.2(b)2Aiiia or b, then all accessible leaks shall be sealed and verified through a visual inspection and a smoke test by a certified HERS Rater utilizing the methods specified in Reference Residential Appendix RA3.1.4.3.5.
Exception 1 to Section 180.2(b)2Aiii: duct sealing. Duct systems that are documented to have been previously sealed as confirmed through field verification and diagnostic testing in accordance with procedures in Reference Residential Appendix RA3.1.
Exception 2 to Section 180.2(b)2Aiii: duct sealing. Duct systems with less than 40 linear feet as determined by visual inspection.
Exception 3 to Section 180.2(b)2Aiii: duct sealing. Existing duct systems constructed, insulated or sealed with asbestos.
Exception 4 to Section 180.2(b)2Aiii: The HERS Rater field verification and HERS Provider data registry requirements of Reference Residential Appendix RA2 and RA3 are not required for multifamily dwelling units in buildings four stories and greater. The installer shall certify that diagnostic testing was performed in accordance with the applicable procedures.
Altered space-conditioning system mechanical cooling. When a space-conditioning system is an air conditioner or heat pump that is altered by the installation or replacement of refrigerant-containing system components such as the compressor, condensing coil, evaporator coil, refrigerant metering device or refrigerant piping, the altered system shall comply with the following requirements:
All thermostats associated with the system shall be replaced with setback thermostats meeting the requirements of Section 110.2(c).

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In Climate Zones 2, 8, 9, 10, 11, 12, 13, 14 and 15, air-cooled air conditioners and air-source heat pumps, including but not limited to ducted split systems, ducted package systems, small duct high velocity air systems, and minisplit systems, shall comply with Subsections I and II, unless the system is of a type that cannot be verified using the specified procedures. Systems that cannot comply with the requirements of Section 180.2(b)2Aivb shall comply with Section 180.2(b)2Aivc.
Exception to Section 180.2(b)2Aivb: Entirely new or complete replacement packaged systems for which the manufacturer has verified correct system refrigerant charge prior to shipment from the factory are not required to have refrigerant charge confirmed through field verification and diagnostic testing. The installer of these packaged systems shall certify that the packaged system was pre-charged at the factory and has not been altered in a way that would affect the charge.
Ducted systems shall comply with the minimum system airflow rate requirement in Section 180.2(b)2AivbI, provided that the system is of a type that can be verified using the procedure specified in RA3.3 or an approved alternative in RA1.
The minimum system airflow rate shall comply with the applicable Subsection A or B below as confirmed through field verification and diagnostic testing in accordance with the procedures specified in Reference Residential Appendix Section RA3.3 or an approved alternative procedure as specified in Section RA1.
Small duct high velocity systems shall demonstrate a minimum system airflow rate greater than or equal to 250 cfm per ton of nominal cooling capacity; or
All other air-cooled air conditioner or air-source heat pump systems shall demonstrate a minimum system airflow rate greater than or equal to 300 cfm per ton of nominal cooling capacity.
Exception 1 to Section 180.2(b)2AivbI: Systems unable to comply with the minimum airflow rate requirement shall demonstrate compliance using the procedures in Section RA3.3.3.1.5, and the system's thermostat shall conform to the specifications in Section 110.12.
Exception 2 to Section 180.2(b)2AivbI: Entirely new or complete replacement space- conditioning systems, as specified by Section 180.2(b)2Ai, without zoning dampers may comply with the minimum airflow rate by meeting the applicable requirements in Table 160.3-A or 160.3-B as confirmed by field verification and diagnostic testing in accordance with the procedures in Reference Residential Appendix Sections RA3.1.4.4 and RA3.1.4.5. The design clean-filter pressure drop requirements of Section 160.2(a)1C for the system air filter device(s) shall conform to the requirements given in Tables 160.3-A and 160.3-B.
The installer shall charge the system according to manufacturer’s specifications. Refrigerant charge shall be verified according to one of the following options, as applicable.
The installer and rater shall perform the standard charge verification procedure as specified in Reference Residential Appendix Section RA3.2.2, or an approved alternative procedure as specified in Section RA1; or
The system shall be equipped with a fault indicator display (FID) device that meets the specifications of Reference Joint Appendix JA6. The installer shall verify the refrigerant charge and FID device in accordance with the procedures in Reference Residential Appendix Section RA3.4.2. The HERS Rater shall verify FID device in accordance with the procedures in Section RA3.4.2; or
The installer shall perform the weigh-in charging procedure as specified by Reference Residential Appendix Section RA3.2.3.1, provided the system is of a type that can be verified using the RA3.2.2 standard charge verification procedure and RA3.3 airflow rate verification procedure or approved alternatives in RA1. The HERS Rater shall verify the charge using RA3.2.2 and RA3.3 or approved alternatives in RA1.
Exception 1 to Section 180.2(b)2AivbII: When the outdoor temperature is less than 55 degrees F and the installer utilizes the weigh-in charging procedure in Reference Residential

2022 Building Energy Efficiency Standards	Page 493
Appendix Section RA3.2.3.1 to demonstrate compliance, the installer may elect to utilize the HERS Rater verification procedure in Reference Residential Appendix Section RA3.2.3.2. If the HERS Rater verification procedure in Section RA3.2.3.2 is used for compliance, the system's thermostat shall conform to the specifications in Section 110.12. Ducted systems shall comply with the minimum system airflow rate requirements in Section 180.2(b)2AivbI.
EXCEPTION 2 to Section 180.2(b)2Aivb: The HERS Rater field verification and HERS Provider data registry requirements of Reference Residential Appendix RA2 and RA3 are not required for multifamily dwelling units in buildings four stories and greater. The installer shall certify that diagnostic testing was performed in accordance with the applicable procedures.
Altered Space-Heating System. Altered or replacement space-heating systems shall not use electric resistance as the primary heat source.
EXCEPTION 1 to Section 180.2(b)2Av: Non-ducted electric resistance space heating systems if the existing space heating system is electric resistance.
EXCEPTION 2 to Section 180.2(b)2Av: Ducted electric resistance space heating systems if the existing space heating system is electric resistance and a ducted space cooling system is not being replaced or installed.
EXCEPTION 3 to Section 180.2(b)2Av: Electric resistance space heating systems, if the existing space heating system is electric resistance in Climate Zones 6, 7, 8, or 15.
Common Use Area Space Conditioning Systems
New or Replacement Space-Conditioning Systems or Components other than new or replacement space-conditioning system ducts shall meet the requirements of Sections 170.2(c)1, 2, and 4, applicable to the systems or components being altered. For compliance with Section 170.2(c)4A, additional fan power adjustment credits are available as specified in TABLE 180.2-D.

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TABLE 180.2-D Fan Power Limitation Pressure Drop Adjustment
Airflow	Multi-Zone VAV
Systems1
≤5,000 cfm	Multi-Zone VAV
Systems1
>5,000 and
≤10,000 cfm	Multi-Zone VAV Systems1
>10,000 cfm	All Other Fan Systems
≤5,000 cfm	All Other Fan Systems
>5,000 and
≤10,000 cfm	All Other Fan Systems
>10,000
cfm	
Supply Fan System Additional Allowance	0.135	0.114	0.105	0.139	0.12	0.107	
Supply Fan System Additional Allowance In Unit with Adapter
Curb	0.033	0.033	0.043	0.000	0.000	0.000	
Exhaust/ Relief/ Return/ Transfer Fan System Additional
Allowance	0.07	0.061	0.054	0.07	0.062	0.055	
Exhaust/ Relief/ Return/ Transfer Fan System Additional Allowance In Unit with
Adapter Curb	0.016	0.017	0.022	0.000	0.000	0.000	
Footnotes to Table 180.2-D:
1. See FAN SYSTEM, MULTI-ZONE VARIABLE AIR VOLUME (VAV) for the definition of a Multi-Zone VAV System.

Exception 1 to Section 180.2(b)2Bi. Section 180.2(b)2Av does not apply to replacement of electric reheat of equivalent or lower capacity electric resistance space heaters when natural gas is not available.
Exception 2 to Section 180.2(b)2Bi: Section 170.2(c)4L is not applicable to new or replacement space-conditioning systems.
Exception 3 to Section 180.2(b)2Bi: Section 170.2(c)4Ci is applicable to systems, other than single package air-cooled commercial unitary air conditioners and heat pumps, with cooling capacity less than 54,000 Btu/h.
Altered duct systems. When new or replacement space-conditioning system ducts are installed to serve an existing building, the new ducts shall meet the requirements of Section 160.3(c)2 and meet a or b below:
Reserved.
Entirely new or replacement duct systems installed as part of an alteration shall be leakage- tested in accordance with Section 160.2(c)2H. Entirely new or replacement duct systems installed as part of an alteration shall be constructed of at least 75 percent new duct material, and up to 25 percent may consist of reused parts from the building's existing duct system, including registers, grilles, boots, air handlers, coils, plenums, and ducts, if the reused parts are accessible and can be sealed to prevent leakage.
EXCEPTION 1 to Section 180.2(b)2Biib: When it is not possible to achieve the duct leakage criteria in Section 180.2(b)2Biib, all accessible leaks shall be sealed and verified through a visual inspection and a smoke test performed by a certified HERS Rater utilizing the methods specified in Reference Nonresidential Appendix NA2.1.4.2.2a.

2022 Building Energy Efficiency Standards	Page 495
EXCEPTION 2 to Section 180.2(b)2Biib: Duct Sealing. Existing duct systems that are extended, which are constructed, insulated or sealed with asbestos are exempt from the requirements of subsection 180.2(b)2Biib.
If the new ducts are an extension of an existing duct system, the combined new and existing duct system meets the criteria in Subsections I, II, and III below. The duct system shall be sealed to a leakage rate not to exceed 15 percent of the nominal air handler airflow rate as confirmed through field verification and diagnostic testing, in accordance with the applicable procedures in Reference Nonresidential Appendices NA1 and NA2:
The duct system provides conditioned air to an occupiable space for a constant volume, single zone, space-conditioning system; and
The space conditioning system serves less than 5,000 square feet of conditioned floor area; and
The combined surface area of the ducts located in the following spaces is more than 25 percent of the total surface area of the entire duct system:
Outdoors;
In a space directly under a roof that
Has a U-factor greater than the U-factor of the ceiling, or if the roof does not meet the requirements of Section 170.2(a)1B, or
Has fixed vents or openings to the outside or unconditioned spaces; or
In an unconditioned crawl space; or
In other unconditioned spaces.
Altered space-conditioning systems. When a space-conditioning system is altered by the installation or replacement of space-conditioning system equipment (including replacement of the air handler, outdoor condensing unit of a split system air conditioner or heat pump, or cooling or heating coil:
For all altered units where the existing thermostat does not comply with the requirements for demand responsive controls specified in Section 110.12, the existing thermostat shall be replaced with a demand responsive thermostat that complies with Section 110.12. All newly installed space-conditioning systems requiring a thermostat shall be equipped with a demand responsive thermostat that complies with Section 110.12; and
The duct system that is connected to the new or replaced space-conditioning system equipment shall be sealed, if the duct system meets the criteria of Section 170.2(c)4Ji, as confirmed through field verification and diagnostic testing, in accordance with the applicable procedures for duct sealing of altered existing duct systems as specified in Reference Nonresidential Appendix NA2, and conforming to the applicable leakage compliance criteria in Section 180.2(b)2Bii.
Exception 1 to Section 180.2(b)2Biiib: duct sealing. Buildings altered so that the duct system no longer meets the criteria of Section 170.2(c)4Ji are exempt from the requirements of Subsection 180.2(b)2Biiib.
Exception 2 to Section 180.2(b)2Biiib: duct sealing. Duct systems that are documented to have been previously sealed as confirmed through field verification and diagnostic testing in accordance with procedures in the Reference Nonresidential Appendix NA2 are exempt from the requirements of Subsection 180.2(b)2Biiib.
Exception 3 to Section 180.2(b)2Biiib: duct sealing. Existing duct systems constructed, insulated or sealed with asbestos are exempt from the requirements of Subsection 180.2(b)2Biiib.

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Hot water systems. Altered or replacement water-heating systems or components serving individual dwelling units shall meet the applicable requirements below:
Pipe insulation. For newly installed piping and existing accessible piping, the insulation requirements of Section 160.4(f) shall be met.
Distribution system. For recirculation distribution system serving individual dwelling units, only demand recirculation systems with manual on/off control as specified in Reference Appendix RA4.4.9 shall be installed.
Water-heating system. The water-heating system shall meet one of the following:
A natural gas or propane water-heating system; or
A single heat pump water heater. The storage tank shall not be located outdoors and shall be placed on an incompressible, rigid insulated surface with a minimum thermal resistance of R-10. The water heater shall be installed with a communication interface that either meets the requirements of Section 110.12(a) or has an ANSI/CTA-2045-B communication port; or
A single heat pump water heater that meets the requirements of NEEA Advanced Water Heater Specification Tier 3 or higher; or
If the existing water heater is an electric resistance water heater, a consumer electric water heater.
A water-heating system determined by the Executive Director to use no more energy than the one specified in Sections 180.2(b)3Ci through iii above; or if no natural gas is connected to the existing water heater location, a water-heating system determined by the Executive Director to use no more energy than the one specified in Section 180.2(b)3Civ above.
Lighting.
Dwelling unit lighting. The altered lighting system shall meet the lighting requirements of Section 160.5(a). The altered luminaires shall meet the luminaire efficacy requirements of Section 160.5(a) and Table 160.5-A. Where existing screw base sockets are present in ceiling-recessed luminaires, removal of these sockets is not required, provided that new JA8 compliant trim kits or lamps designed for use with recessed downlights or luminaires are installed.
Common use area—lighting, sign lighting, and electrical power distribution systems.
Spaces with lighting systems installed for the first time shall meet the applicable requirements of Sections 110.9, 160.5(b)1, 160.5(b)2, 160.5(b)3, 160.5(b)4, 160.5(c), 160.5(e), 170.2(b), and
170.2(e)1 through 170.2(e)6.
When the requirements of Section 160.5(b)4D are triggered by the addition of skylights to an existing building and the lighting system is not recircuited, the daylighting control need not meet the multi-level requirements in Section 160.5(b)4D.
New internally and externally illuminated signs shall meet the requirements of Sections 110.9, 160.5(d) and 170.2(e)7.
Altered indoor lighting systems. Alterations to indoor lighting systems that include 10% or more of the luminaires serving an enclosed space shall meet the requirements of a, b or c below:
The alteration shall comply with the indoor lighting power requirements specified in Sections 170.2(e)1 through 4 and the lighting control requirements specified in Table 180.2-E; or
The alteration shall not exceed 80% of the indoor lighting power requirements specified in Section 170.2(e)1 through 4, and shall comply with the lighting control requirements specified in Table 180.2-E; or
The alteration shall be a one-for-one luminaire alteration within a building or tenant space of 5,000 square feet or less, the total wattage of the altered luminaires shall be at least 40%

2022 Building Energy Efficiency Standards	Page 497
lower compared to their total pre-alteration wattage and the alteration shall comply with the lighting control requirements specified in Table 180.2-E.
Alterations to indoor lighting systems shall not prevent the operation of existing, unaltered controls, and shall not alter controls to remove functions specified in Section 160.5(b)4.
Alterations to lighting wiring are considered alterations to the lighting system. Alterations to indoor lighting systems are not required to separate existing general, floor, wall, display or decorative lighting on shared circuits or controls. New or completely replaced lighting circuits shall comply with the control separation requirements of Sections 160.5(b)4Aiv and 160.5(b)4Cid.
Exception 1 to Section 180.2(b)4Biv: Alteration of portable luminaires, luminaires affixed to moveable partitions, or lighting excluded as specified in Section 170.2(e)2C.
Exception 2 to Section 180.2(b)4Biv: Any enclosed space with only one luminaire.
Exception 3 to Section 180.2(b)4Biv: Any alteration that would directly cause the disturbance of asbestos unless the alteration is made in conjunction with asbestos abatement.
Exception 4 to Section 180.2(b)4Biv: Acceptance testing requirements of Section 160.5(e) are not required for alterations where lighting controls are added to control 20 or fewer luminaires.
Exception 5 to Section 180.2(b)4Biv: Any alteration limited to adding lighting controls or replacing lamps, ballasts or drivers.
Exception 6 to Section 180.2(b)4Biv: One-for-one luminaire alteration of up to 50 luminaires either per complete floor of the building or per complete tenant space, per annum.
Alterations to existing outdoor lighting systems in a lighting application listed in Table 170.2-R or 170.2-S shall meet the applicable requirements of Sections 160.5(b)1, 160.5(b)2, 160.5(b)3, 160.5(c)1 and 160.5(e), and:
In alterations that increase the connected lighting load, the added or altered luminaires shall meet the applicable requirements of Section 160.5(c)2 and the requirements of Section 170.2(e)6 for general hardscape lighting or for the specific lighting applications containing the alterations; and
In alterations that do not increase the connected lighting load, where 10 percent or more of the existing luminaires are replaced in a general hardscape or a specific lighting application, the alterations shall meet the following requirements:
In parking lots and outdoor sales lots where the bottom of the luminaire is mounted 24 feet or less above the ground, the replacement luminaires shall comply with Section 160.5(c)2A and Section 160.5(c)2C;
For parking lots and outdoor sales lots where the bottom of the luminaire is mounted greater than 24 feet above the ground and for all other lighting applications, the replacement luminaires shall comply with Section 160.5(c)2A and either comply with Section 160.5(c)2B or be controlled by lighting control systems, including motion sensors, that automatically reduce lighting power by at least 40 percent in response to the area being vacated of occupants; and
Exception to Section 180.2(b)4Bvb: Alterations where less than 5 existing luminaires are replaced.
In alterations that do not increase the connected lighting load, where 50 percent or more of the existing luminaires are replaced in general hardscape or a specific application, the replacement luminaires shall meet the requirements of Subsection b above and the requirements of Section 170.2(e)6 for general hardscape lighting or specific lighting applications containing the alterations.

Page 498		2022 Building Energy Efficiency Standards Exception 1 to Section 180.2(b)4Bvc: Alterations where the replacement luminaires have at least 40 percent lower power consumption compared to the original luminaires are not required to comply
with the lighting power allowances of Section 170.2(e)6.
Exception 2 to Section 180.2(b)4Bvc: Alterations where less than 5 existing luminaires are replaced.
Exception 3 to Section 180.2(b)4Bv: Acceptance testing requirements of Section 160.5(e) are not required for alterations where controls are added to 20 or fewer luminaires.
Alterations to existing internally and externally illuminated signs that increase the connected lighting load, replace and rewire more than 50 percent of the ballasts, or relocate the sign to a different location on the same site or on a different site shall meet the requirements of Section 170.2(e)7.
Exception to Section 180.2(b)4Bvi: Replacement of parts of an existing sign, including replacing lamps, the sign face or ballasts, that do not require rewiring or that are done at a time other than when the sign is relocated, is not an alteration subject to the requirements of Section 180.2(b)4Bvi.
Alterations to existing electrical power distribution systems shall meet the applicable requirements of the following sections:
Service electrical metering. New or replacement electrical service equipment shall meet the requirements of Section 160.6(a) applicable to the electrical power distribution system altered; and
Separation of electrical circuits for electrical energy monitoring. For entirely new or complete replacement of electrical power distribution systems, the entire system shall meet the applicable requirements of Section 160.6(b); and
Voltage drop. For alterations of feeders and branch circuits where the alteration includes addition, modification or replacement of both feeders and branch circuits, the altered circuits shall meet the requirements of Section 160.6(c); and
Exception to Section 180.2(b)4Bviic: Voltage drop permitted by California Electrical Code Sections 647.4, 695.6 and 695.7.
Circuit controls for 120-volt receptacles and controlled receptacles. For entirely new or complete replacement of electrical power distribution systems, the entire system shall meet the applicable requirements of Section 160.6(d).

2022 Building Energy Efficiency Standards	Page 499
TABLE 180.2-E Control Requirements for Indoor Lighting System Alterations for Common Use Areas
Control Specifications	Projects complying with Section
180.2(b)4Biva	Projects complying with Sections 180.2(b)4Bivb or 180.2(b)4Bivc	
Manual Area Controls
160.5(b)4Ai	Required	Required	
Manual Area Controls
160.5(b)4Aii	Required	Required	
Manual Area Controls 160.5(b)4Aii	Only required for new or completely
replaced circuits	Only required for new or completely replaced circuits	
Multi-Level Controls
160.5(b)4B	Required	Not Required	
Automatic Shut Off Controls
160.5(c)4Ci	Required; 160.5(b)4Cid
only required for new or completely
replaced circuits	Required; 160.5(b)4Cid only required for new or completely replaced circuits	
Automatic Shut Off Controls
160.5(c)4Cii	Required	Required	
Automatic Shut Off Controls
160.5(c)4Cii	Required	Required	
Automatic Shut Off Controls
160.5(c)4Civ	Required	Required	
Automatic Shut Off Controls
160.5(b)4Cv	Required	Required	
Automatic Shut Off Controls
160.5(b)4Cvi	Required	Required	
Automatic Shut Off Controls
160.5(b)4Cvii	Required	Required	
Daylighting Controls
160.5(b)4D	Required	Not Required	
Demand Responsive Controls
160.5(b)4E	Required	Not Required	

Mechanical ventilation and indoor air quality for dwelling units. Alterations to existing buildings shall comply with Subsections A and B below as applicable. When HERS field verification and diagnostic testing are required by Section 180.2(b)5, buildings with three habitable stories or less shall use the applicable procedures in the Residential Appendices, and buildings with four or more habitable stories shall use the applicable procedures in Nonresidential Appendices NA1 and NA2.
Entirely new or complete replacement ventilation systems. Entirely new or complete replacement ventilation systems shall comply with all applicable requirements in Section 160.2(b)2. An entirely new or complete replacement ventilation system includes a new ventilation fan component and an entirely new duct system. An entirely new or complete replacement duct system is constructed of at least 75 percent new duct material, and up to 25 percent may consist of reused parts from the

Page 500		2022 Building Energy Efficiency Standards dwelling unit's existing duct system, including but not limited to registers, grilles, boots, air filtration devices and duct material, if the reused parts are accessible and can be sealed to prevent leakage.
Altered ventilation systems. Altered ventilation system components or newly installed ventilation equipment serving the alteration shall comply with Section 160.2(b)2 as applicable subject to the requirements specified in Subsections i and ii below.
Whole-dwelling unit mechanical ventilation.
Whole-dwelling unit airflow. If the whole-dwelling ventilation fan is altered or replaced, then one of the following Subsections 1 or 2 shall be used for compliance as applicable.
Dwellings that were required by a previous building permit to comply with the whole- dwelling unit airflow requirements in Section 160.2(b)2, 120.1(b) or 150.0(o) shall meet or exceed the whole-dwelling unit mechanical ventilation airflow specified in Section 160.2(b)2Aiv or 160.2(b)2Av as confirmed through HERS field verification and diagnostic testing in accordance with the applicable procedures specified in Reference Appendix RA3.7 or NA2.2.
Dwellings that were not required by a previous building permit to have a whole-dwelling unit ventilation system to comply with Section 160.2(b)2, 120.1(b) or 150.0(o) shall not be required to comply with the whole-dwelling unit ventilation airflow specified in Section 160.2(b)2Aiv or 160.2(b)2Av.
Replacement ventilation fans. Whole-dwelling unit replacement ventilation fans shall be rated for airflow and sound in accordance with the requirements of ASHRAE 62.2 Sections 7.1 and 7.2. Additionally, when conformance to a specified whole-dwelling unit airflow rate is required for compliance, the replacement fans shall be rated at no less than the airflow rate required for compliance.
Air filters. If the air filtration device for a whole-dwelling unit ventilation system is altered or replaced, then one of the following Subsections 1 or 2 shall be used for compliance.
Dwellings that were required by a previous building permit to comply with the ventilation system air filtration requirements in Section 160.2(b)1, 120.1(b)1 or 150.0(m)12 shall comply with the air filtration requirements in Section 160.2(b)1.
Dwellings that were not required by a previous building permit to comply with the ventilation system air filtration requirements in Section 160.2(b)1, 120.1(b)1 or 150.0(m)12 shall not be required to comply with the air filtration requirements specified in Section 160.2(b)1.
Local mechanical exhaust.
Bathroom local mechanical exhaust. Altered bathroom local mechanical exhaust systems shall comply with the applicable requirements specified in Section 160.0(b)2Avi.
Kitchen local mechanical exhaust. If the kitchen local ventilation fan is altered or replaced, then one of the following Subsections 1, 2 or 3 shall be used for compliance.
Dwellings that were required by a previous building permit to comply with the kitchen local exhaust requirements in Section 160.0(b)2Avi, 120.1(b)2vi or 150.0(o)1G shall meet or exceed the applicable airflow or capture efficiency requirements in Section 160.0(b)2Avi.
Dwellings that were required by a previous building permit to install a vented kitchen range hood or other kitchen exhaust fan shall install a replacement fan that meets or exceeds the airflow required by the previous building permit, or 100 cfm, whichever is greater.

2022 Building Energy Efficiency Standards	Page 501
Dwellings that were not required to have a kitchen local ventilation exhaust system according to the conditions in either Subsection 1 or 2 above shall not be required to comply with the requirements of Section 160.0(b)2Avi.
Replacement ventilation fans. New or replacement local mechanical exhaust fans shall be rated for airflow and sound in accordance with the requirements of ASHRAE 62.2 Section 7.1 and Title 24, Part 6, Section 160.0(b)2Avif. Additionally, when compliance with a specified exhaust airflow rate is required, the replacement fan shall be rated at no less than the airflow rate required for compliance.
Performance approach. The altered component(s) and any newly installed equipment serving the alteration shall meet the applicable requirements of Subsections 1, 2 and 3 below.
The altered components shall meet the applicable requirements of Sections 110.0 through 110.9, 160.0, 160.1, 160.2(c) and (d), 160.3(a) through 160.3(b)5J, 160.3(b)6, 160.3(c), and 160.5. Entirely new or complete replacement mechanical ventilation systems as these terms are used in Section 180.2(b)5A shall comply with the requirements in Section 180.2(b)5A. Altered mechanical ventilation systems shall comply with the requirements of Sections 180.2(b)5B. Entirely new or complete replacement space-conditioning systems, and entirely new or complete replacement duct systems, as these terms are used in Sections 180.2(b)2Ai and 180.2(b)2Aiia, shall comply with the requirements of Sections 160.2(a)1 and 160.3(b)5L.
The standard design for an altered component shall be the higher efficiency of existing conditions or the requirements of Section 180.2(b). For components not being altered, the standard design shall be based on the unaltered existing conditions such that the standard and proposed designs for these components are identical. When the third-party verification option is specified, all components proposed for alteration for which the additional credit is taken shall be verified by a qualified third party.
The proposed design shall be based on the actual values of the altered components.
NOTES TO SECTION 180.2(c):
If an existing component must be replaced with a new component, that component is considered an altered component for the purpose of determining the standard design altered component energy budget and must meet the requirements of Section 180.2(c)2.
The standard design shall assume the same geometry and orientation as the proposed design.
The “existing efficiency level” modeling rules, including situations where nameplate data is not available, are described in the applicable Residential or Nonresidential ACM Approval Manual.
EXCEPTION 1 to Section 180.2(c): Any dual-glazed greenhouse or garden window installed as part of an alteration complies with the U-factor requirements in Section 170.2.
EXCEPTION 2 to Section 180.2(c): Where the space in the attic or rafter area is not large enough to accommodate the required R-value, the entire space shall be filled with insulation provided such installation does not violate Section 1203.2 of Title 24, Part 2.
Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference:
Sections 25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and 25943, Public
Resources Code.

Page 502	2022 Building Energy Efficiency Standards

SECTION 180.3 – REPAIRS
Repairs shall not increase the preexisting energy consumption of the repaired component, system or equipment.
NOTE: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code.
Reference: Sections 25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8 and
25943, Public Resources Code.

SECTION 180.4 – WHOLE BUILDING
Any addition or alteration may comply with the requirements of Title 24, Part 6 by meeting the requirements for the entire building.
NOTE: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code.
Reference: Sections 25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and
25943, Public Resources Code.

CALIFORNIA MECHANICAL CODE, CALIFORNIA CODE OF REGULATIONS, TITLE 24, PART 4 CHAPTER 6, DUCT SYSTEMS
TABLE P4-A ADOPTION TABLE

CODE SECTION		Agency	
Adopt Entire Chapter as amended (amended Sections listed below)1		CEC	
601.0		X	
602.0		X	
603.0		X	
604.0		X	
605.0		X	

1 Adopted by reference for Occupancies A, B, E, F, H, M, R S, and U; see Sections 110.8(d)3, 120.4 and 150.0(m).

APPENDIX 1-A
STANDARDS AND DOCUMENTS REFERENCED IN THE ENERGY CODE
The following documents are incorporated by reference to the extent they are referenced in the Energy Code.
AIR-CONDITIONING, HEATING AND REFRIGERATION INSTITUTE
AHRI 210/240-2017	Performance Rating of Unitary Air-Conditioning and Air-Source Heat Pump Equipment (2008 2017 W/Addendum 1)
AHRI 310/380-2017	Packaged Terminal Air-Conditioners and Heat Pumps (2017) AHRI 340/360 (I-P)-2019
Performance Rating of Commercial and Industrial Unitary Air-Conditioning and Heat Pump
Equipment (2019)
ANSI/AHRI 365 (I-P)-2009	Performance Rating of Commercial and Industrial Unitary Air-Conditioning Condensing Units (2009)
ANSI/AHRI 390-2003	Performance Rating of Single Package Vertical Air Conditioners and Heat Pumps (2003) ANSI/AHRI 400 (I-P)-2015	Performance Rating of Liquid to Liquid Heat Exchangers (2015)
AHRI 430 (I-P)-2020	Performance Rating of Central Station Air-handling Unit Supply Fans (2020) AHRI 440 (I-P)-2019	Performance Rating of Fan-coil Units (2019)
ANSI/AHRI 460-2005	 Performance Rating of Remote Mechanical-Draft Air-Cooled Refrigerant Condensers (2005) AHRI 550/590(I-P)-2020	Performance Rating of Water-chilling and Heat Pump Water-heating Packages Using the
Vapor Compression Cycle (2020)
AHRI 560-2000	Absorption Water Chilling and Water Heating Packages (2000) AHRI 680 (I-P)-2017	Performance Rating of Residential Air Filter Equipment (2017)
AHRI 920 (I-P)-2020	Performance Rating of Direct Expansion-Dedicated Outdoor Air System Units (2020)
AHRI 1060 (I-P)-2018	Performance Rating of Air-to-Air Exchangers for Energy Recovery Ventilation Equipment (2018)
AHRI 1230-2014	Performance Rating of Variable Refrigerant Flow (VRF) Multi-Split Air-Conditioning and Heat Pump Equipment (w/Addendum 1)
AHRI 1360 (I-P)-2017	Performance Rating of Computer and Data Processing Room Air Conditioners (2017)

Available from:	Air-Conditioning, Heating and Refrigeration Institute
2311 Wilson Blvd, Suite 400
Arlington, VA 22203
(703) 524-8800

ASSOCIATION OF HOME APPLIANCE MANUFACTURERS
AHAM HRH-2-2020	Residential Kitchen Range Hood Performance Test Procedures (2020)
AHAM RKRH-CPPG-2020	Residential Kitchen Range Hood Certification Program Procedural Guide (2020) Version 3.0

Available from:	Association of Home Appliance Manufacturers
1111 19th Street, NW, Suite 402
Washington, DC 20036
(202) 872-5955
www.aham.org

AIR-CONDITIONING CONTRACTORS OF AMERICA
ANSI/ACCA 2 Manual J-2016 Manual J - Residential Load Calculation, Eighth Edition (2016) Available from:	Air-Conditioning Contractors of America, Inc.
2800 Shirlington Road, Suite 300
Arlington, VA 22206
(703) 575-4477
www.acca.org
AMERICAN ARCHITECTURAL MANUFACTURERS ASSOCIATION CANADIAN STANDARDS ASSOCIATION
WINDOW AND DOOR MANUFACTURERS ASSOCIATION
AAMA/WDMA/CSA 101/I.S.2/A440-17
North American Fenestration Standard/Specification for Windows, Doors, and Skylights (2017)
Available from:
AAMA
1827 Walden Office Square, Suite 550
Schaumburg, IL 60173-4268
(847) 303-5664
www.aamanet.org CSA
5060 Spectrum Way, Suite 100
Mississauga, ON, Canada L4W 5N6 (800) 463-6727
www.csagroup.org WDMA
2025 M Street, NW, Suite 800
Washington, DC 20036-3309
(202) 367-1157
www.wdma.com

AMERICAN CONFERENCE OF GOVERNMENTAL INDUSTRIAL HYGENISTS
2021 TLVs and BEIs	Threshold Limit Values for Chemical Substances and Physical Agents and Biological Exposure Indices
Available from:
ACGIH
1330 Kemper Meadow Drive Cincinnati, Ohio 45240
(513) 742-2020
www.acgih.org
AMERICAN NATIONAL STANDARDS INSTITUTE
ANSI/AMCA 208-18	Calculation of the Fan Energy Index (2018)
ANSI/AMCA 210-16	 Laboratory Methods of Testing Fans for Certified Aerodynamic Performance Rating (2016) ANSI/AMCA 500-D-18	Laboratory Methods Of Testing Dampers For Rating (2018)
ANSI/ASABE S640 JUL2017 Quantities and Units of Electromagnetic Radiation for Plants (Photosynthetic Organisms) ANSI/ASSP Z9.5-2012	Laboratory Ventilation (2012)
ANSI/CTA-2045-B-2021	Modular Communications Interface for Energy Management (2018)
ANSI C82.6-2015 (R2020)	American National Standard for Lamp Ballasts - Ballasts for High-Intensity Discharge Lamps -
Methods of Measurement (2020)
ANSI/NEMA WD 6-2016	American National Standard for Wiring Devices - Dimensional Specifications (2016) ANSI Z21.40.4a-1998 (R2017)/CGA 2.94a-M98 (R2017)
Performance Testing and Rating of Gas-Fired, Air-Conditioning and Heat Pump Appliances (2017)
ANSI Z21.47-2021/CSA 2.3:21
Gas-Fired Central Furnaces (2021) ANSI Z83.8-2016/CSA 2.6-2016 (R2021)
Gas Unit Heaters, Gas Packaged Heaters, Gas Utility Heaters and Gas-Fired Duct Furnaces (2016)

Available from:
American National Standards Institute 25 West 43rd Street, 4th floor
New York, NY 10036
(212) 642-4900

ANSI/APSP/ICC 5-2011	American National Standard For Residential Inground Swimming Pools (2011 w/Addendum A)
Available from:	Association of Pool & Spa Professionals 2111 Eisenhower Ave.
Alexandria, VA 22314
(703) 838-0083

AMERICAN SOCIETY OF HEATING, REFRIGERATING AND AIR-CONDITIONING ENGINEERS (NATIONAL PUBLICATIONS)
ANSI/ASHRAE STANDARD 52.2-2017	Method of Testing General Ventilation Air-Cleaning Devices for Removal
Efficiency by Particle Size (2017)
ANSI/ASHRAE STANDARD 55-2020	Thermal Environment Conditions for Human Occupancy (2020) ANSI/ASHRAE STANDARD 62.1-2019	Ventilation for Acceptable Indoor Air Quality (2019)
ANSI/ASHRAE STANDARD 62.2-2019	Ventilation and Acceptable Indoor Air Quality in Residential Buildings (2019) ANSI/ASHRAE STANDARD 84-2020	Method of Testing Air-to-Air Heat/Energy Exchangers (2020) ANSI/ASHRAE/IES STANDARDS 90.1-2019	Energy Standards for Buildings Except Low-Rise Residential Buildings (2019) ANSI/ASHRAE STANDARD 154-2016	Ventilation For Commercial Cooking Operations (2016)
ANSI/ASHRAE 193-2010 (RA2014)	Method of Test for Determining the Airtightness of HVAC Equipment
(RA2014)
ASHRAE Handbooks
HVAC Applications (I-P) (2019)
HVAC Systems and Equipment (I-P) (2020) Fundamentals (I-P) (2017)
Available from:	American Society of Heating,
Refrigerating and Air-Conditioning Engineers (ASHRAE)
1791 Tullie Circle N.E. Atlanta, GA 30329 www.ashrae.org
AMERICAN SOCIETY OF HEATING, REFRIGERATING AND AIR-CONDITIONING ENGINEERS (REGIONAL PUBLICATION)
ASHRAE Climatic Data for Region × Arizona, California, Hawaii, Nevada, Publication SPCDX, 1982, ISBN #20002196 and Supplement, 1994, ISBN #20002596
Available from:	Order Desk Building News
10801 National Boulevard Los Angeles, CA 90064
(800) 873-6397 or (310) 474-7771
www.bnibooks.com/

AMERICAN SOCIETY OF MECHANICAL ENGINEERS
ASME A17.1-2019/CSA B44:19	Safety Code for Elevators and Escalators (2019) ASME A112.18.1-2018/CSA B125.1-18	Plumbing Supply Fittings
Available from:	ASME
Two Park Avenue
New York, NY 10016-5990 (800) 843-2763
http://www.asme.org/

AMERICAN SOCIETY FOR TESTING AND MATERIALS / ASTM INTERNATIONAL
ASTM C55-17	Standard Specification for Concrete Building Brick (2017)

ASTM C177-19	Standard Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Guarded Hot Plate Apparatus (2019)
ASTM C272/C272M-18	Standard Test Method for Water Absorption of Core Materials for Structural Sandwich Constructions (2018)
ASTM C335/C335M-17	Standard Test Method for Steady-State Heat Transfer Properties of Horizontal Pipe Insulation (2017)
ASTM C518-17	Standard Test Method for Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus (2017)
ASTM C731-15	Standard Test Method for Extrudability, After Package Aging, of Latex Sealants (2015) ASTM C732-17	Standard Test Method for Aging Effects of Artificial Weathering on Latex Sealants (2017) ASTM C836/C836M-18	Standard Specification for High Solids Content, Cold Liquid-Applied Elastomeric
Waterproofing Membrane for Use with Separate Wearing Course (2018)
ASTM C1167-11(2017)	Standard Specification for Clay Roof Tiles (2017)
ASTM C1371-15	Standard Test Method for Determination of Emittance of Materials Near Room Temperature Using Portable Emissometers (2015)
ASTM C1492-03(2016)	Standard Specification for Concrete Roof Tile (2016)
ASTM C1549-16	Standard Test Method for Determination of Solar Reflectance Near Ambient Temperature Using a Portable Solar Reflectometer (2016)
ASTM C1583/C1583M-20	Standard Test Method for Tensile Strength of Concrete Surfaces and the Bond Strength or Tensile Strength of Concrete Repair and Overlay Materials by Direct Tension (Pull-off Method) (2020)
ASTM D448-12(2017)	Standard Classification for Sizes of Aggregate for Road and Bridge Construction (2017) ASTM D522/D522M-17	Standard Test Methods for Mandrel Bend Test of Attached Organic Coatings (2017)
ASTM D822/D822M-13(2018)	Standard Practice for Filtered Open-Flame Carbon-Arc Exposures of Paint and Related Coatings (2018)
ASTM D1003-21	Standard Test Method for Haze and Luminous Transmittance of Transparent Plastics (2021) ASTM D1653-21	Standard Test Methods for Water Vapor Transmission of Organic Coating Films (2021) ASTM D1863/D1863M-05(2018)	Standard Specification for Mineral Aggregate Used on Built-Up Roofs (2018)
ASTM D2202-00(2019)	Standard Test Method for Slump of Sealants (2019)
ASTM D2370-16	Standard Test Method for Tensile Properties of Organic Coatings (20162016)
ASTM D2824/D2824M-18	Standard Specification for Aluminum-Pigmented Asphalt Roof Coatings, Nonfibered, and Fibered without Asbestos (2018)
ASTM D3468/D3468M-99(2020)
Standard Specification for Liquid-Applied Neoprene and Chlorosulfonated Polyethylene Used in Roofing and Waterproofing (2020)
ASTM D3805/D3805M-16	Standard Guide for Application of Aluminum-Pigmented Asphalt Roof Coatings (2016) ASTM D4798/D4798M-11(2021)	Standard Practice for Accelerated Weathering Test Conditions and Procedures for
Bituminous Materials (Xenon-Arc Method) (2021)

ASTM D5870-16	Standard Practice for Calculating Property Retention Index of Plastics (2016) ASTM D6083/D6083M-21	Standard Specification for Liquid- Applied Acrylic Coating Used in Roofing (2021)
ASTM D6694/D6694M-15	Standard Specification for Liquid- Applied Silicone Coating Used in Spray Polyurethane Foam Roofing Systems (2015)
ASTM E96/E96M-16	Standard Test Methods for Water Vapor Transmission of Materials (2016)

ASTM E283/E283M-19	Standard Test Method for Determining Rate of Air Leakage Through Exterior Windows, Skylights, Curtain Walls, and Doors Under Specified Pressure Differences Across the Specimen (2019)
ASTM E408-13(2019)	Standard Test Methods for Total Normal Emittance of Surfaces Using Inspection-Meter Techniques (2019)
ASTM E779-19	 Standard Test Method for Determining Air Leakage Rate by Fan Pressurization (2019) ASTM E903-20	Standard Test Method for Solar Absorptance, Reflectance, and Transmittance of Materials
Using Integrating Spheres(2020)
ASTM E972-96(2021)	Standard Test Method for Solar Photometric Transmittance of Sheet Materials Using Sunlight (2021)
ASTM E1175-87(2015)	Standard Test Method for Determining Solar or Photopic Reflectance, Transmittance, and Absorptance of Materials Using a Large Diameter Integrating Sphere (2015)
ASTM E1677-19	Standard Specification for Air Barrier (AB) Material or Assemblies for Low-Rise Framed Building Walls (2019)
ASTM E1680-16	Standard Test Method for Rate of Air Leakage through Exterior Metal Roof Panel Systems (2016)
ASTM E1918-16	Standard Test Method for Measuring Solar Reflectance of Horizontal and Low-Sloped Surfaces in the Field (2016)
ASTM E1980-11(2019)	Standard Practice for Calculating Solar Reflectance Index of Horizontal and Low-Sloped Opaque Surfaces (2019)
ASTM E2178-21	Standard Test Method for Determining Air Leakage Rate and Calculation of Air Permeance of Building Materials (2021)
ASTM E2357-18	Standard Test Method for Determining Air Leakage Rate of Air Barrier Assemblies (2018) ASTM E3087-18	Standard Test Method for Measuring Capture Efficiency of Domestic Range Hoods (2018)

Available from:	ASTM International
100 Barr Harbor Drive West Conshohocken, PA 19428-2959
(800) 262-1373 or (610) 832-9500

CALIFORNIA HISTORICAL BUILDING CODE
2022 California Building Code 2022 California Electrical Code 2022 California Fire Code
2022 California Mechanical Code 2022 California Plumbing Code
Available from:	California Building Standards Commission
2525 Natomas Park Drive, Suite 130
Sacramento, CA 95833-2936
(916) 263-0916
www.bsc.ca.gov
CALIFORNIA ENERGY COMMISSION
Appliance Efficiency Regulations
Alternative Calculation Method (ACM) Manual
Available from:	California Energy Commission 1516 Ninth Street
Sacramento, CA 95814
(916) 654-5106 or
(800) 772-3300 (in California) www.energy.ca.gov/title24
CALIFORNIA DEPARTMENT OF CONSUMER AFFAIRS
Standards for Insulating Material
Available from:	California Department of Consumer Affairs
Bureau of Household Goods and Services 4244 South Market Court, Suite D Sacramento, California 95834-1243
(916) 999-2041
CERTIFYING ORGANIZATION
CIE 13.3-1995	Method of Measuring and Specifying Colour Rendering Properties of Light Sources (1995) CIE 015-2018	Technical Report: Colorimetry (2018)

COOLING TECHNOLOGY INSTITUTE
CTI ATC-105(19)	 Acceptance Test Code for Cooling Towers (2019) CTI ATC-105DS (18)	Acceptance Test Code for Dry Fluid Coolers (2018)
CTI ATC-105S (11)	Acceptance Test Code for Closed-Circuit Cooling Towers (2011)
CTI ATC-106 (11)	Acceptance Test Code for Mechanical Draft Evaporative Vapor Condensers (2011) CTI STD-201-RS (17)	Standard for the Certification of Water Cooling Tower Thermal Performance (2017)

Available from:	Cooling Technology Institute 2611 FM 1960 West, Suite A101
Houston, Texas 77068-3730
PO Box 73383
Houston, TX 77273-3383
(281) 583-4087
COOL ROOF RATING COUNCIL
CRRC-1	Product Rating Program Manual (2021)
Available from:	Cool Roof Rating Council 2435 N. Lombard Street Portland, OR 97217
(866) 465-2523
www.coolroofs.org
HOME VENTILATING INSTITUE
HVI Publication 915-2020	HVI Loudness Testing and Rating Procedure (2020) HVI Publication 916-2020	HVI Airflow Test Procedure (2020)
HVI Publication 920-2020	HVI Product Performance Certification Procedure Including Verification And Challenge (2020) Available from:	Home Ventilating Institute
1740 Dell Range Blvd., Suite H, PMB 450
Cheyenne, WY 82009
(855) 484-8368
www.hvi.org

ILLUMINATING ENGINEERING SOCIETY
The IES Lighting LibraryTM
ANSI/IES LM-79-19	Approved Method: Optical and Electrical Measurements of Solid State Lighting Products (2019)
ANSI/IES LS-1-20	Lighting Science: Nomenclature and Definitions for Illuminating Engineering (2020) ANSI/IES TM-15-20	Technical Memorandum: Luminaire Classification System for Outdoor Luminaires (2020) Available from:	Illuminating Engineering Society
120 Wall Street, 17th Floor
New York, NY 10005-4026
(212) 248-5000
www.ies.org

INTERNATIONAL ASSOCIATION OF PLUMBING AND MECHANICAL OFFICIALS
California Mechanical Code
Available from:	International Association of Plumbing and Mechanical Officials
4755 E. Philadelphia St.
Ontario, CA 91761
(800) 85-IAPMO (854-2766)
www.iapmo.org
INTERNATIONAL CODE COUNCIL
California Building Code
Available from:	International Code Council Western Regional Office 3060 Saturn St.
Brea, CA 92821
(888) 422-7233
www.iccsafe.org
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION
ISO 5801:2017	Fans- Performance testing using standardized airways (2017)
ISO 13256-1:1998 (RA 2012) Water-Source Heat Pumps-Testing and Rating for Performance-Part 1: Water-to-Air and Brine-to-Air Heat Pumps (2012)
ISO 13256-2:1998 (RA2012) Water-Source Heat pumps-Testing and rating for Performance-Part 2: Water-to-Water and Brine-to-Water Heat Pumps (2012)
ISO/IEC 17025:2017	General Criteria for the Competence of Testing and Calibration Laboratories (2017)

Available from:	ISO
Chemin de Blandonnet 8 CP 401
1214 Vernier Geneva, Switzerland

INTERNATIONAL WINDOW FILM ASSOCIATION
Architectural Visual Inspection Standard Window Film (reindorsed 2018) Available from:	International Window Film Association
P.O. Box 3871
Martinsville, VA 24115-3871
276-666-4932
NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION
NEMA LSD 57-2018	Polyurethane Foam Application: Lighting Equipment (2018)
NEMA SSL 7A-2015	Phase Cut Dimming for Solid State Lighting: Basic Compatibility (2015) Available from:	1300 North 17th Street, Suite 1752
Rosslyn, VA 22209
708-841-3200
www.nema.org
NATIONAL FENESTRATION RATING COUNCIL
ANSI/NFRC 100-2020	Procedure for Determining Fenestration Product U-factors (2020)
ANSI/NFRC 200-2020	Procedure for Determining Fenestration Product Solar Heat Gain Coefficients and Visible Transmittance at Normal Incidence (2020)
ANSI/NFRC 202-2020	Procedure for Determining Translucent Fenestration Product Visible Transmittance at Normal Incidence (2020)
ANSI/NFRC 203-2020	Procedure for Determining Visible Transmittance of Tubular Daylighting Devices (2020) ANSI/NFRC 400-2020	Procedure for Determining Fenestration Product Air Leakage (2020)

Available from:	National Fenestration Rating Council 6035 Ivy Lane, Suite 140
Greenbelt, MD 20770
(301) 589-1776
www.NFRC.org Email: info@nfrc.org
NSF INTERNATIONAL (FORMERLY NATIONAL SANITATION FOUNDATION)
NSF/ANSI/CAN 50-2020	Equipment and Chemicals for Swimming Pools, Spas, Hot Tubs, and Other Recreational Water Facilities (22020)
Available from:	NSF International PO Box 130140
Ann Arbor, MI 48113 (735) 769-8010
RESIDENTIAL ENERGY SERVICES NETWORK
ANSI/RESNET/ICC 380-2019
Standard for Testing Airtightness of Building Enclosures, Dwelling Unit, and Sleeping Unit Enclosures, Airtightness of Heating and Cooling Air Distribution Systems; and Airflow of Mechanical Ventilation Systems (2019)
Available from:	Residential Energy Services Network, Inc. (RESNET)
P.O. Box 4561
Oceanside, CA 92052-4561 https://www.resnet.us/

SAE INTERNATIONAL
SAE J1772_201710	SAE Electric Vehicle and Plug in Hybrid Electric Vehicle Conductive Charge Coupler (2017)
SHEET METAL AND AIR-CONDITIONING CONTRACTORS’ NATIONAL ASSOCIATION
Residential Comfort System Installation Standards Manual, Eighth Edition (2016) ANSI/SMACNA 006-2006	HVAC Duct Construction Standards - Metal and Flexible (2006)
Available from:	Sheet Metal and Air-Conditioning Contractors’ National Association (SMACNA) 4201 Lafayette Center Drive
Chantilly, VA 20151-1209
(703) 803-2980
www.smacna.org
UNDERWRITERS LABORATORIES / UL
UL 181	Standard for Safety for Factory-made Air Ducts and Connectors (2017)
UL 181A	Standard for Safety for Closure Systems for Use with Rigid Air Ducts (2017)
UL 181B	Standard for Safety for Closure Systems for Use with Flexible Air Ducts and Air Connectors (2017)
UL 723	Standard for Safety for Test for Surface Burning Characteristics of Building Materials (2018) UL 727	Standard for Safety for Oil-Fired Central Furnaces (2018)
UL 731	Standard for Safety for Oil-Fired Unit Heaters (2018)
UL 1077	Standard for Safety for Supplementary Protectors for Use in Electrical Equipment (2016) UL 1574	Standard for Safety for Track Lighting Systems (2020)
UL 1598	Standard for Safety for Luminaires (2021)
UL 1741	Standard for Safety for Inverters, Converters, Controllers and Interconnection System Equipment for Safety for Use With Distributed Energy Resources (2021)
UL 1973	Standard for Safety for Batteries for Use in Stationary, Vehicle Auxiliary Power and Light Electric Rail (LER) Applications (2018)
UL 2108	Standard for Safety for Low Voltage Lighting Systems (2019)
UL 8750	Standard for Safety for Light Emitting Diode (LED) Equipment for Use in Lighting Products (2021)
UL 9540	Standard for Safety for Energy Storage Systems and Equipment (2021)

Available from:	UL LLC
333 Pfingsten Road
Northbrook, IL 60062-2096
(847) 272-8800

APPENDIX 1-B
ENERGY COMMISSION DOCUMENTS INCORPORATED BY REFERENCE IN THEIR ENTIRETY

The following documents published by the California Energy Commission are incorporated by reference in their entirety into the Energy Code:
Referenced appendices for the Building Energy Efficiency Standards for Residential and Nonresidential Buildings, including the Joint Appendices (JA), the Residential Appendices (RA), and Nonresidential Appendices (NA)
Alternative Calculation Method (ACM) Approval Manual Available from:	California Energy Commission/Publications
1516 Ninth Street
Sacramento, CA 95814
(916) 654-5200
www.energy.ca.gov/title24

2022 Building Energy Efficiency Standards	Page 517