On-site recovered/renewable energy and energy budget credits

Grounded in the retrieved California Residential Code — click a citation to read the verbatim passage:

• CRC § 11.7 Medium relevance — show source text

  (3) The individual mechanical cooling unit has a design cooling capacity of not more than 40 000

  434 2025 CALIFORNIA MECHANICAL CODE

  ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.

  APPENDIX E

  Btu/h (11.7 kW). An individual mechanical cooling unit is a single system composed of a fan or fans and a cooling coil capable of providing mechanical cooling.

  (4) Systems serving spaces where specific humidity levels are required to satisfy process application needs, such as vivariums, museums, surgical suites, pharmacies, and buildings with refrigerating systems, such as supermarkets, refrigerated warehouses, and ice arenas, and where the building includes site-recovered energy or on-site renewable energy that provide energy equal to 75 percent or more of the annual energy for reheating or for providing warm air in mixing systems. This exception shall not apply to computer rooms.

  (5) Not less than 90 percent of the annual energy for reheating or for providing warm air in mixing systems is provided from site-recovered energy (including condenser heat) or on-site renewable energy.

  (6) Systems where the heat added to the airstream is the result of the use of a desiccant system and 75 percent of the heat added by the desiccant system is removed by a heat exchanger, either before or after the desiccant system with energy recovery. [ASHRAE 90.1:6.5.2.3]

  E 503.5.5.4 Humidifier Preheat. Humidifiers

  with preheating jackets mounted in the airstream shall be provided with an automatic valve to shut off preheat where humidification is not required.

  [ASHRAE 90.1:6.5.2.4.1]

  E 503.5.5.4.1 Insulation. Humidification system dispersion tube hot surfaces in the airstreams of ducts or air-handling units shall be insulated with a product with an insulating value of not less than R-0.5.

  Exception: Systems where mechanical cooling, including economizer operation, does not occur

  simultaneously with humidification. [ASHRAE 90.1:6.5.2.4.2]

  E 503.5.5.5 Preheat Coils. Preheat coils shall have controls that stop their heat output where mechanical cooling, including economizer operation, is occurring. [ASHRAE 90.1:6.5.2.5]

  E 503.5.5.6 Ventilation Air Heating Control. Units that provide ventilation air to multiple zones and operate in conjunction with zone heating and cooling systems shall not use heating or heat recovery to warm supply air above 60°F (16°C) when representative building loads or outdoor air temperature indicate that the majority of zones require cooling.

  Exception: Units that heat the airstream using only series energy recovery when representative building loads or outdoor air temperature indicate that the majority of zones require cooling in Climate Zones 0A, 1A, 2A, 3A, and 4A. [ASHRAE 90.1:6.5.2.6]

• CRC § 170.0 Medium relevance — show source text

  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 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 Sections 10-109 and 10-116 and the Alternative Calculation Method Reference Manual.

  (a) Energy budget. The energy budget is expressed in terms of long-term system cost (LSC) and source energy:

  1. Long-term system cost (LSC). The LSC energy budget is determined by applying the mandatory and prescriptive requirements of the standard design to the proposed design building and has two components, the Efficiency LSC and the Total LSC.

  A. The Efficiency LSC energy is the sum of the LSC energy for space-conditioning, water heating, mechanical ventilation, lighting and the self-utilization credit. B. The Total LSC energy is the sum of the Efficiency LSC energy and LSC energy from the photovoltaic system, battery energy storage systems (BESS), and demand flexibility. 2. Source energy. The source energy budget is determined by applying the mandatory and prescriptive requirements of the standard design, except with a consumer gas or propane water heater, to the proposed design building.

  Exception to Section 170.1(a): A community shared solar electric generation system, or other renewable electric generation system, and/or community shared BESS, 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 BESS LSC energy required to comply with the standards, as calculated according to methods established by the Commission in the Nonresidential ACM Reference Manual.

  (b) Compliance demonstration requirements for performance standards.

  1. 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 and LSC energy consumption do not exceed the standard design energy budgets for the applicable climate zone.
  2. Field verification of individual dwelling unit systems.
• CRC § 10-109 Medium relevance — show source text

  (b) Performance approach. A building complies with the performance approach 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 Sections 10-109(c) and 10-116.

  1. Energy budget. The energy budget is expressed in terms of source energy and long-term system cost (LSC). A. Long-term system cost (LSC). The LSC energy budget is determined by applying the mandatory and prescriptive requirements of the standard design to the proposed design building and has two components, the Efficiency LSC and the Total LSC.

  i. The Efficiency LSC energy is the sum of the LSC energy for space-conditioning, water heating, mechanical ventilation, and the self-utilization credit.

  ii. The Total LSC energy is the sum of the Efficiency LSC energy and LSC energy from the photovoltaic system, battery energy storage systems (BESS), lighting, demand flexibility, and other plug loads. B. Source energy. The source energy budget is determined by applying the mandatory and prescriptive requirements of the standard design to the proposed design building. The source energy is the total annual source energy. Exception to Section 150.1(b)1. A community shared solar electric generation system, or other renewable electric generation system, or community shared BESS, 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.

  2. Compliance demonstration requirements for performance standards. A. 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 consumption does not exceed the standard design energy budgets for the applicable climate zone. Exception to Section 150.1(b)2A 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.

  B. 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. i. EER2/SEER2/CEER/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. ii. **Variable capacity heat pump (VCHP) compliance option.

• CRC § 140.1 Medium relevance — show source text

  A. The Efficiency LSC energy is the sum of the LSC energy for space-conditioning, water heating, mechanical ventilation, and lighting. B. The Total LSC energy is the sum of the Efficiency LSC energy and LSC energy from the photovoltaic system, battery energy storage systems (BESS) and demand flexibility. 2. Source energy . The source energy budget is determined by applying the mandatory and prescriptive requirements of the standard design to the proposed design building.

  Exception to Section 140.1(a). A community shared solar electric generation system, or other renewable electric generation system, and/or community shared BESS, 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 BESS LSC energy required to comply with the standards, as calculated according to methods established by the Commission in the Nonresidential ACM Reference 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 140.2—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 140.3—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.

  (a) Envelope component requirements.

  1. Exterior roofs and ceilings. Exterior roofs and ceilings shall comply with each of the applicable requirements in this subsection:

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  NONRESIDENTIAL AND HOTEL/MOTEL OCCUPANCIES—PERFORMANCE AND PRESCRIPTIVE

  COMPLIANCE APPROACHES FOR ACHIEVING ENERGY EFFICIENCY

  A. Roofing products. Shall meet the requirements of Section 110.8 and the applicable requirements of Subsections i through ii: i. Nonresidential buildings: a. Low-sloped roofs in climate zones 1 through 16 shall have:

  1. A minimum aged solar reflectance of 0.63 and a minimum thermal emittance of 0.75; or
  2. A minimum solar reflectance index (SRI) of 75.
• CRC § 201.1 Medium relevance — show source text

  SECTION A4.201—GENERAL

  A4.201.1 Scope. For the purposes of mandatory energy efficiency standards in the California Building Standards Code (Title 24), the California Energy Commission will continue to adopt mandatory standards in the California Energy Code (Title 24, Part 6). It is the intent of these voluntary provisions to encourage local jurisdictions through codification to achieve exemplary performance in the area of building energy efficiency. Local jurisdictions adopting these voluntary provisions as mandatory local energy efficiency standards shall submit the required application and receive the required approval of the California Energy Commission in compliance with Title 24, Part 1, Section 10-106 prior to enforcement. Once the required filing has been verified and finding has been made by the Energy Commission, local jurisdictions shall file an ordinance expressly marking the local modification along with findings and receive the required acceptance from the California Building Standards Commission in compliance with Section 101.7 of this code, prior to enforcement. (Title 24, Part 1, Section 10-106 is available at https://www.energy.ca.gov/programs-and-topics/programs/build- ing-energy-efficiency-standards/2025-building-energy-efficiency

  SECTION A4.202—DEFINITIONS

  A4.202.1 Definitions. The following terms are defined in Chapter 2.

  ENERGY BUDGET.

  LONG-TERM SYSTEM COST (LSC).

  RECOVERED ENERGY, ON-SITE.

  SOLAR POOL HEATING SYSTEM.

  SECTION A4.203—PERFORMANCE APPROACH FOR NEWLY CONSTRUCTED BUILDINGS

  A4.203.1 Energy efficiency. Newly constructed low-rise residential buildings shall comply with Sections A4.203.1.1 through A4.203.1.4.

  A4.203.1.1 Long-term system cost (LSC). LSC rating for the building’s Proposed Design shall be computed by Compliance Software certified by the Energy Commission as specified in Title 24, Part 6, Section 100.1 and 150.1(b), and shall reduce the LSC required in the Compliance Software for minimum performance-based compliance with the California Energy Code by the compliance margin specified in Table A4.203.1.1. The rating shall be included in the Certificate of Compliance documentation.

  TABLE A4.203.1.1—RECOMMENDED LSC MARGINS BY CLIMATE ZONES	Col2
  CALIFORNIA ENERGY CODE CLIMATE ZONE	TOTAL LSC COMPLIANCE MARGIN
  1	2.70
  2	1.62
  3	1.10
  4	1.11
  5	1.01
  6	0.24
  7	0.24
  8	0.21
  9	0.20
  10	0.18
  11	1.11
  12	1.05
  13	0.96
  14	1.21
  15	0.59
  16	1.68
  Note: Community shared options complying with Title 24, Part 1, Section 10-115 may be used to achieve LSC targets.	Note: Community shared options complying with Title 24, Part 1, Section 10-115 may be used to achieve LSC targets.

  2025 CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDIX A4-9

• CRC § 140.0 Medium relevance — show source text

  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 140.1—PERFORMANCE APPROACH: ENERGY BUDGETS

  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 Sections 10-109(c) and 10-116.

  (a) Energy budget. The energy budget is expressed in terms of long-term system cost (LSC) and source energy.

  1. Long-term system cost (LSC). The LSC energy budget is determined by applying the mandatory and prescriptive requirements of the standard design to the proposed design building and has two components, the Efficiency LSC and the Total LSC.

  A. The Efficiency LSC energy is the sum of the LSC energy for space-conditioning, water heating, mechanical ventilation, and lighting. B. The Total LSC energy is the sum of the Efficiency LSC energy and LSC energy from the photovoltaic system, battery energy storage systems (BESS) and demand flexibility. 2. Source energy . The source energy budget is determined by applying the mandatory and prescriptive requirements of the standard design to the proposed design building.

  Exception to Section 140.1(a). A community shared solar electric generation system, or other renewable electric generation system, and/or community shared BESS, 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 BESS LSC energy required to comply with the standards, as calculated according to methods established by the Commission in the Nonresidential ACM Reference 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 140.2—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.

• CRC § 204.1 Medium relevance — show source text

  ** Buildings complying with the second level of advanced energy efficiency shall have an Energy Budget that is no greater than indicated below, depending on building type and the type of energy systems included in the building project. If the newly constructed building or addition does not include indoor lighting or mechanical systems, then no additional performance requirements above Title 24, Part 6 are required.

  1. For nonresidential building projects that include indoor lighting or mechanical systems, but not both: No greater than 90 percent of the Title 24, Part 6, Energy Budget for the Standard Design Building as calculated by compliance software certified by the Energy Commission.
  2. For nonresidential building projects that include indoor lighting and mechanical systems: No greater than 85 percent of the Title 24, Part 6, Energy Budget for the Standard Design Building as calculated by compliance software certified by the Energy Commission.
  3. For high-rise residential and hotel/motel building projects: No greater than 95 percent of the Title 24, Part 6, Energy Budget for the Standard Design Building as calculated by compliance software certified by the Energy Commission.

  Note: For Energy Budget calculations, high-rise residential and hotel/motel buildings are considered nonresidential buildings.

  SECTION A5.204—MANDATORY REQUIREMENTS FOR ALTERATIONS TO EXISTING BUILDINGS

  A5.204.1 Energy efficiency . Alterations to existing nonresidential buildings shall comply with Section A5.204.1.1.

  A5.204.1.1 Altered pool and/or spa heating for existing nonresidential buildings . Alteration of existing nonresidential pool and/or spa heating system shall meet the following.

  Heating source sizing. Heating systems or equipment for pools or spas shall meet one of the sizing requirements of Items 1 through 5 below:

  1. Solar pool heating system with a solar collector surface area that is equivalent to 65 percent or greater of the surface areas of the pool or spa or a combination of both respectively; or
  2. A heat pump pool heater as the primary heating system that meets the sizing requirements of Reference Joint Appendix JA16.3. The control for the heat pump pool heater shall meet the requirements specified in Section 110.4(d). The supplementary heater can be of any energy source; or
  3. A heating system that derives at least 60 percent of the annual heating energy from on-site renewable energy or on-site recovered energy; or
  4. A combination of a solar pool heating system and heat pump pool heater without any additional supplementary heater;

  or

  5. A pool heating system determined by the Energy Commission Executive Director to use no more energy than the systems specified in Item 1, 2, 3, or 4 above.

  Exception 1 to A5.204.1.1: Portable electric spas compliant with 20 CCR, Section 1605.3(g)(7) of the Appliance Efficiency Regulations.

  Exception 2 to A5.204.1.1: A pool or spa that is heated solely by a solar pool heating system without any supplementary heater.

  Exception 3 to A5.204.1.1: An existing building with inadequate Solar Access Roof Area (SARA) as specified in Section 140.10(a) for a solar pool heating system to be installed.

  Exception 4 to A5.204.1.1: Heating systems which are used exclusively for permanent spa applications in existing buildings with gas availability.

  SECTION A5.211—RESERVED

  SECTION A5.212—ELEVATORS, ESCALATORS AND OTHER EQUIPMENT

• CRC § 150.1 Medium relevance — show source text

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  8 SINGLE-FAMILY RESIDENTIAL BUILDINGS—PERFORMANCE

  AND PRESCRIPTIVE COMPLIANCE APPROACHES

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

  (a) Basic requirements. Single-family residential buildings shall meet all of the following:

  1. The applicable requirements of Sections 110.0 through 110.10.
  2. The applicable requirements of Section 150.0 (mandatory features).
  3. 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 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 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.

  (b) Performance approach. A building complies with the performance approach 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 Sections 10-109(c) and 10-116.

  1. Energy budget. The energy budget is expressed in terms of source energy and long-term system cost (LSC). A. Long-term system cost (LSC). The LSC energy budget is determined by applying the mandatory and prescriptive requirements of the standard design to the proposed design building and has two components, the Efficiency LSC and the Total LSC.

  i. The Efficiency LSC energy is the sum of the LSC energy for space-conditioning, water heating, mechanical ventilation, and the self-utilization credit.

  ii. The Total LSC energy is the sum of the Efficiency LSC energy and LSC energy from the photovoltaic system, battery energy storage systems (BESS), lighting, demand flexibility, and other plug loads. B. Source energy. The source energy budget is determined by applying the mandatory and prescriptive requirements of the standard design to the proposed design building. The source energy is the total annual source energy. Exception to Section 150.1(b)1. A community shared solar electric generation system, or other renewable electric generation system, or community shared BESS, 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.

• CRC § 110.4 Medium relevance — show source text

  A heat pump pool heater as the primary heating system that meets the sizing requirements of Reference Joint Appendix JA16.3. The control for the heat pump pool heater shall meet the requirements specified in Title 24, Part 6, Section 110.4(d). The supplementary heater can be of any energy source; or 3. A heating system that derives at least 60 percent of the annual heating energy from on-site renewable energy or on-site recovered energy; or 4. A combination of a solar pool heating system and heat pump pool heater without any additional supplementary heater; or 5. A pool heating system determined by the Energy Commission Executive Director to use no more energy than the systems specified in Item 1, 2, 3, or 4 above.

  Exception 1 to A4.204.1.2: Portable electric spas compliant with 20 CCR, Section 1605.3(g)(7) of the Appliance Efficiency Regulations.

  Exception 2 to A4.204.1.2: A pool or spa that is heated solely by a solar pool heating system without any supplementary heater.

  Exception 3 to A4.204.1.2: An existing building with inadequate Solar Access Roof Area (SARA) as specified in Title 24, Part 6, Section 170.2(f) for a solar pool heating system to be installed.

  Exception 4 to A4.204.1.2: Heating systems which are used exclusively for permanent spa applications in existing buildings with gas availability.

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

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  A4 RESIDENTIAL VOLUNTARY MEASURES

  DIVISION A4.3 – WATER EFFICIENCY AND CONSERVATION

  SECTION A4.301—GENERAL (RESERVED)

  SECTION A4.302—DEFINITIONS (RESERVED)

  SECTION A4.303—INDOOR WATER USE

  A4.303.1 Kitchen faucets. The maximum flow rate of kitchen faucets shall not exceed 1.5 gallons per minute at 60 psi. Kitchen faucets may temporarily increase the flow above the maximum rate, but not to exceed 2.2 gallons per minute at 60 psi, and must default to a maximum flow rate of 1.5 gallons per minute at 60 psi.

  Note: Where complying faucets are unavailable, aerators or other means may be used to achieve reduction.

  A4.303.2 Alternate water sources for nonpotable applications. Alternate nonpotable water sources are used for indoor potable water reduction. Alternate nonpotable water sources shall be installed in accordance with the California Plumbing Code.

  A4.303.3 Appliances. Install at least one qualified ENERGY STAR dishwasher or clothes washer.

  Note: See Section A5.303.3 for nonresidential dishwashers and clothes washers.

• CRC § 13256-1 Medium relevance — show source text

  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.|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.|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.|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.|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	Col2	Col3	Col4	Col5
  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.	a. Applicable test procedure and reference year are provided under the definitions.	a. Applicable test procedure and reference year are provided under the definitions.	a. Applicable test procedure and reference year are provided under the definitions.	a. Applicable test procedure and reference year are provided under the definitions.

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

  TABLE 110.2-D—WATER CHILLING PACKAGES—MINIMUM EFFICIENCY REQUIREMENTSa, b	Col2	Col3	Col4	Col5
  EQUIPMENT TYPE	SIZE CATEGORY	PATH A **EFFICIENCYa,

• CRC § 203.1.1.1 Medium relevance — show source text

  2**
  Energy
  Efficiency|Tier 1
  Prerequisite|Energy performance—outdoor lighting power 90% of Part 6|A5.203.1.1.1||||| |DIVISION 5.2
  Energy
  Efficiency|DIVISION 5.2
  Energy
  Efficiency|Tier 1
  Prerequisite|If applicable, service for water heating in restaurants of 8,000
  sf or greater|A5.203.1.1.2||||| |DIVISION 5.2
  Energy
  Efficiency|DIVISION 5.2
  Energy
  Efficiency|Tier 1
  Prerequisite|Energy budget 95% or 90% of Part 6 calculated value of
  allowance|A5.203.1.2.1||||| |DIVISION 5.2
  Energy
  Efficiency|DIVISION 5.2
  Energy
  Efficiency|Elective|On-site renewable energy (with documentation)|A5.211.1, A5.211.1.1||||| |DIVISION 5.2
  Energy
  Efficiency|DIVISION 5.2
  Energy
  Efficiency|Elective|Green power|A5.211.3||||| |DIVISION 5.2
  Energy
  Efficiency|DIVISION 5.2
  Energy
  Efficiency|Elective|Elevators with car lights and fan|A5.212.1.1,
  A5.212.1.1.1||||| |DIVISION 5.2
  Energy
  Efficiency|DIVISION 5.2
  Energy
  Efficiency|Elective|Escalators|A5.212.1.2||||| |DIVISION 5.2
  Energy
  Efficiency|DIVISION 5.2
  Energy
  Efficiency|Elective|Controls that reduce energy|A5.212.1.4||||| |DIVISION 5.2
  Energy
  Efficiency|DIVISION 5.2
  Energy
  Efficiency|Elective|Steel framing|A5.213.1|||||

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  APPENDIX A5 — NONRESIDENTIAL VOLUNTARY MEASURES

  CHAPTER 5 DIVISIONS	Col2	Col3	SECTION TITLE	CODE SECTION	Y	N	O	PLAN SHEET, SPEC OR ATTACH
  **DIVISION 5.

• CRC § 106.8.2.2 Medium relevance — show source text

  Exception: Areas of parking facilities served by parking lifts, including but not limited to automated mechanicalaccess open parking garages as defined in the California Building Code ; or parking facilities otherwise incapable of supporting electric vehicle charging.

  A4.106.8.2.2 Technical requirements. The EV spaces required by Section A4.106.8.2 shall be designed and constructed in accordance with Sections 4.106.4.2, 4.106.4.2.2.1.1, 4.106.4.2.2.1.2, and 4.106.4.2.5.

  SECTION A4.107 (RESERVED)

  SECTION A4.108 —INNOVATIVE CONCEPTS AND LOCAL ENVIRONMENTAL CONDITIONS

  A4.108.1 Innovative concepts and local environmental conditions. The provisions of this code are not intended to prevent the use of any alternate material, appliance, installation, device, arrangement, method, design or method of construction not specifically prescribed by this code. This code does not limit the authority of city, county, or city and county government to make necessary changes to the provisions contained in this code pursuant to Section 101.7.1.

  2025 CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDIX A4-7

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  APPENDIX A4-8 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

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  A4 RESIDENTIAL VOLUNTARY MEASURES

  DIVISION A4.2 – ENERGY EFFICIENCY

  SECTION A4.201—GENERAL

  A4.201.1 Scope. For the purposes of mandatory energy efficiency standards in the California Building Standards Code (Title 24), the California Energy Commission will continue to adopt mandatory standards in the California Energy Code (Title 24, Part 6). It is the intent of these voluntary provisions to encourage local jurisdictions through codification to achieve exemplary performance in the area of building energy efficiency. Local jurisdictions adopting these voluntary provisions as mandatory local energy efficiency standards shall submit the required application and receive the required approval of the California Energy Commission in compliance with Title 24, Part 1, Section 10-106 prior to enforcement. Once the required filing has been verified and finding has been made by the Energy Commission, local jurisdictions shall file an ordinance expressly marking the local modification along with findings and receive the required acceptance from the California Building Standards Commission in compliance with Section 101.7 of this code, prior to enforcement. (Title 24, Part 1, Section 10-106 is available at https://www.energy.ca.gov/programs-and-topics/programs/build- ing-energy-efficiency-standards/2025-building-energy-efficiency

  SECTION A4.202—DEFINITIONS

  A4.202.1 Definitions. The following terms are defined in Chapter 2.

  ENERGY BUDGET.

  LONG-TERM SYSTEM COST (LSC).

  RECOVERED ENERGY, ON-SITE.

  SOLAR POOL HEATING SYSTEM.

  SECTION A4.203—PERFORMANCE APPROACH FOR NEWLY CONSTRUCTED BUILDINGS

• CRC § 108.1 Medium relevance — show source text

  108.1** Items in this section are necessary to address innovative
  concepts or local environmental conditions.||||||| |Item 1|
  |
  |
  |
  |
  |
  | |Item 2|
  |
  |
  |
  |
  |
  | |Item 3||||||| |ENERGY EFFICIENCY||||||| |General||||||| |4.201.1 Building meets or exceeds the requirements of the_California_
  _Building Energy Efficiency Standards_3.||2|2|||| |Performance Approach for Newly
  Constructed Buildings||||||| |**A4.203.1.1 Hourly Source Energy Rating (EDR1).**EDR1 ratings for
  building design shall be computed by Energy Compliant software and
  shall reduce the EDR1 required by the software by the compliance
  margins specified in Table A4.203.1.1.||2|2|||| |**A4.203.1.2 Prerequisite options.In addition, a minimum of two of
  the efficiency measures specified in Sections A4.203.1.2.1 through
  A4.203.1.2.8 will be required to be met.
  · Roof Deck Insulation or Ducts in Conditioned Space.
  · High-performance Walls.
  · Compact Hot Water Distribution System.
  · Drain Water Heat Recovery.
  · High Performance Vertical Fenestration.
  · Heat Pump Water Heater Demand Management.
  · Battery Storage System Controls.
  · **Heat Pump Space and Water Heating.||2|2|||| |**A4.203.1.3 Consultation with local electric service provider.**Local
  jurisdictions considering adoption of reduced EDR targets based on
  using solar photovoltaic (PV) systems larger than required by the
  California Energy Code shall consult with the local electric service
  provider to ensure that that PV system sizing required to comply with
  the EDR targets will be acceptable to the local electric service
  provider.||2|2||||

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  APPENDIX A4 — RESIDENTIAL VOLUNTARY MEASURES

  SECTION A4.602—RESIDENTIAL OCCUPANCIES APPLICATION CHECKLIST—continued

• CRC § 203.1.2.1 Medium relevance — show source text

  In addition, a minimum of two of
  the efficiency measures specified in Sections A4.203.1.2.1 through
  A4.203.1.2.8 will be required to be met.
  · Roof Deck Insulation or Ducts in Conditioned Space.
  · High-performance Walls.
  · Compact Hot Water Distribution System.
  · Drain Water Heat Recovery.
  · High Performance Vertical Fenestration.
  · Heat Pump Water Heater Demand Management.
  · Battery Storage System Controls.
  · **Heat Pump Space and Water Heating.||2|2|||| |**A4.203.1.3 Consultation with local electric service provider.**Local
  jurisdictions considering adoption of reduced EDR targets based on
  using solar photovoltaic (PV) systems larger than required by the
  California Energy Code shall consult with the local electric service
  provider to ensure that that PV system sizing required to comply with
  the EDR targets will be acceptable to the local electric service
  provider.||2|2||||

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  APPENDIX A4 — RESIDENTIAL VOLUNTARY MEASURES

  SECTION A4.602—RESIDENTIAL OCCUPANCIES APPLICATION CHECKLIST—continued

  FEATURE OR MEASURE	LEVELS APPLICANT TO SELECT ELECTIVE MEASURES	Col3	Col4	VERIFICATIONS ENFORCING AGENCY TO SPECIFY VERIFICATION METHOD	Col6	Col7
  FEATURE OR MEASURE	Mandatory	Prerequisites and electives1	Prerequisites and electives1	Enforcing Agency  All	Installer or Designer  All	Third party  All
  FEATURE OR MEASURE	Mandatory	Tier 1	Tier 2	Tier 2	Tier 2	Tier 2
  WATER EFFICIENCY AND CONSERVATION
  Indoor Water Use
  4.303.1Plumbing fixtures (water closets and urinals) and fittings (showerheads, faucets and pre-rinse spray valves) installed in residential buildings shall comply with the prescriptive requirements of Sections 4.303.1.1 through 4.303.1.4.5.						
  4.303.2 Submeters for multifamily building and dwelling units in **mixed-use residential/commercial buildings.

• CRC § 203.1.1 Medium relevance — show source text

  A4.203.1.1 Long-term system cost (LSC). LSC rating for the building’s Proposed Design shall be computed by Compliance Software certified by the Energy Commission as specified in Title 24, Part 6, Section 100.1 and 150.1(b), and shall reduce the LSC required in the Compliance Software for minimum performance-based compliance with the California Energy Code by the compliance margin specified in Table A4.203.1.1. The rating shall be included in the Certificate of Compliance documentation.

  TABLE A4.203.1.1—RECOMMENDED LSC MARGINS BY CLIMATE ZONES	Col2
  CALIFORNIA ENERGY CODE CLIMATE ZONE	TOTAL LSC COMPLIANCE MARGIN
  1	2.70
  2	1.62
  3	1.10
  4	1.11
  5	1.01
  6	0.24
  7	0.24
  8	0.21
  9	0.20
  10	0.18
  11	1.11
  12	1.05
  13	0.96
  14	1.21
  15	0.59
  16	1.68
  Note: Community shared options complying with Title 24, Part 1, Section 10-115 may be used to achieve LSC targets.	Note: Community shared options complying with Title 24, Part 1, Section 10-115 may be used to achieve LSC targets.

  2025 CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDIX A4-9

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  APPENDIX A4 — RESIDENTIAL VOLUNTARY MEASURES

  A4.203.1.2 Prerequisite options. In addition, a minimum of TWO of the efficiency measures specified in Sections A4.203.1.2.1 through A4.203.1.2.7 must be met.

  A4.203.1.2.1 Roof deck insulation, or ducts in conditioned space. Meet one of the three options for the location of ducts and air handlers as well as insulation R -values and installation of a radiant barrier as specified in Title 24, Part 6, Section 150.1(c)9A or B:

  1. Below roof deck insulation with a minimum R -value of 19; or,

  2. Continuous above deck insulation with a minimum R-8 and with an air space present between the roofing and the roof deck; or,

  3. All ducts and air handlers in conditioned space as specified in the Title 24, Part 6, Reference Appendix RA3.1.

  A4.203.1.2.2 High performance walls. Meet the climate zone dependent U -factor or insulation R -value for either 2x6 or 2x4 framing as specified in Title 24, Part 6, Section 150.1(c)1B: maximum U -factor of 0.048.

  A4.203.1.2.3 Compact hot water distribution system. Meet the requirements for installation of Compact Hot Water Distribution Systems specified in the Title 24, Part 6, Reference Appendix RA3.6.5.

• CRC § 601.5.2 Medium relevance — show source text

  A4.601.5.2 Prerequisite and elective measures for Tier 2. In addition to the mandatory measures, compliance with the following prerequisite and elective measures from Appendix A4 is also required to achieve Tier 2 status.

  1. From Division A4.1, Planning and Design.

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  APPENDIX A4 — RESIDENTIAL VOLUNTARY MEASURES

  1.1. Comply with the topsoil protection requirements for Tier 1 and Tier 2 in Section A4.106.2.3. 1.2. Comply with the 30 percent permeable paving requirements in Section A4.106.4. 1.3. Comply with the cool roof requirements in Section A4.106.5. 1.4. Comply with the Tier 2 electric vehicle (EV) charging requirements in Section A4.106.8. 1.5. Comply with at least four elective measures selected from Division A4.1. 2. From Division A4.2, Energy Efficiency. 2.1. For newly constructed low-rise residential buildings, comply with the energy efficiency requirements in Sections A4.203.1, A4.203.1.1, Table A4.203.1.1, A4.203.1.2 and A4.203.1.3.

  3. From Division A4.3, Water Efficiency and Conservation. 3.1. Comply with at least three elective measures selected from Division A4.3.
  4. From Division A4.4, Material Conservation and Resource Efficiency. 4.1. Comply with the 25 percent cement reduction requirements in Section A4.403.2. 4.2. Comply with the 15 percent recycled content requirements in Section A4.405.3.1. 4.3. Comply with the 75 percent reduction in construction waste in Section A4.408.1. 4.4. Comply with at least four elective measures selected from Division A4.4.
  5. From Division A4.5, Environmental Quality. 5.1. Comply with the 100 percent resilient flooring systems requirements in Section A4.504.2. 5.2. Comply with the thermal insulation requirements for Tier 1 and Tier 2 in Section A4.504.3. 5.3. Comply with at least one elective measure selected from Division A4.5.

  Note: The Residential Occupancies Application Checklist contained in Section A4.602 may be used to show which elective measures are selected.

  APPENDIX A4-22 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

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  DIVISION A4.6 – TIER 1 AND TIER 2

  SECTION A4.602 — RESIDENTIAL OCCUPANCIES APPLICATION CHECKLIST

• CRC § 5.105.2 Medium relevance — show source text

  Exception: Combined addition(s) to existing building(s) of two times the area or more of the existing building(s) is not eligible to meet compliance with Section 5.105.2 or Section A5.105.2.

  A5.409.2 Whole building life cycle assessment. Projects shall meet the minimum requirements of Section A5.409.2 for Tier 1 or Tier 2 compliance.

  A5.409.2.1 Tier 1. Projects shall conduct a cradle-to-grave whole building life cycle assessment meeting the requirements of Section 5.409.2 and performed in accordance with ISO 14040 and 14044, excluding operating energy, demonstrating a minimum 15-percent reduction in global warming potential (GWP) as compared to a reference baseline building of similar size, function, complexity, type of construction, material specification, and location that meets the requirements of all parts of the California Building Standards Code currently in effect. Software used to conduct the whole building life cycle assessment, including reference baseline building, shall have a data set compliant with ISO 14044, and ISO 21930 or EN 15804, and the software shall conform to ISO 21931 and/or EN 15978. The software tools and data sets shall be the same for evaluation of both the baseline building and the proposed building.

  Exception: For projects that include building reuse, the reference baseline building shall exclude the reused elements. The percent reduction in GWP shall be achieved through the design and construction of new project elements.

  A5.409.2.2 Tier 2. Projects shall conduct a cradle-to-grave whole building life cycle assessment meeting the requirements of Section 5.409.2 and performed in accordance with ISO 14040 and ISO 14044, excluding operating energy, demonstrating a minimum 20-percent reduction in GWP as compared to a reference baseline building of similar size, function, complexity, type of construction, material specification, and location that meets the requirements of all parts of the California Building Standards Code currently in effect. Software used to conduct the whole building life cycle assessment, including reference baseline building, shall have a data set compliant with ISO 14044, and ISO 21930 or EN 15804, and the software shall conform to ISO 21931 and/or EN 15978. The software tools and data sets shall be the same for evaluation of both the baseline building and the proposed building.

  Exception: For projects that include building reuse, the reference baseline building shall not be of new construction and shall retain existing materials. The percent reduction in GWP shall be achieved through the design and construction of new project elements.

  A5.409.2.3 Verification of compliance. A summary of the GWP analysis produced by the software and Worksheet WS-7 signed by the design professional of record shall be provided in the construction documents as documentation of compliance. A copy of the whole building life cycle assessment which includes the GWP analysis produced by the software, in addition to maintenance and training information, shall be included in the operation and maintenance manual and shall be provided to the owner at the close of construction. The enforcing agency may require inspection and inspection reports in accordance with Sections 702.2 and 703.1 during and at completion of construction to demonstrate substantial conformance. Inspection shall be performed by the design professional of record or third party acceptable to the enforcing agency.

  A5.409.3 Product GWP compliance—prescriptive path. Each product that is permanently installed and listed in Table A5.409.3 shall have a Type III environmental product declaration (EPD), either product-specific or factory-specific.

• CRC § 8-40 Medium relevance — show source text

  . . . . . . . . . . . . . 8-40

  APPENDIX A4 RESIDENTIAL

  VOLUNTARY MEASURES. . . . . . . . . . . . . . . . . APPENDIX A4-3

  A4.1 Planning and Design . . . . . . . . . . . . . . . . . APPENDIX A4-3 A4.2 Energy Efficiency . . . . . . . . . . . . . . . . . . . . APPENDIX A4-9 A4.3 Water Efficiency and Conservation . . . APPENDIX A4-13 A4.4 Material Conservation and Resource Efficiency . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX A4-15 A4.5 Environmental Quality . . . . . . . . . . . . . . APPENDIX A4-19 A4.6 Tier 1 and Tier 2 . . . . . . . . . . . . . . . . . . . . APPENDIX A4-21

  Division A4.6—Residential Occupancies Application Checklist . . . . . . . . . . . . . APPENDIX A4-23 A4.7 Residential Model Ordinance . . . . . . . . . APPENDIX A4-31

  APPENDIX A5 NONRESIDENTIAL

  VOLUNTARY MEASURES. . . . . . . . . . . . . . . . . APPENDIX A5-3

  A5.1 Planning and Design . . . . . . . . . . . . . . . . . APPENDIX A5-3 A5.2 Energy Efficiency . . . . . . . . . . . . . . . . . . . APPENDIX A5-13 A5.3 Water Efficiency and Conservation . . . APPENDIX A5-19 A5.4 Material Conservation and Resource Efficiency . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX A5-25 A5.5 Environmental Quality . . . . . . . . . . . . . . APPENDIX A5-35 A5.6 Voluntary Tiers . . . . . . . . . . . . . . . . . . . . . APPENDIX A5-41 A5.601 CALGren Tier 1 and Tier 2. . . . . . . . . . APPENDIX A5-41

  A5.602 CALGreen Verification Guidelines Mandatory Measures Checklist . . . . . . . . . . . . . . . APPENDIX A5-44

  A5.602.1 CALGreen Verification Guidelines

  Tier 1 Checklist . . . . . . . . . . . . . . . . . APPENDIX A5-48

  A5.602.2 CALGreen Verification Guidelines

  Tier 2 Checklist . . . . . . . . . . . . . . . . . APPENDIX A5-55

  APPENDIX A6 VOLUNTARY STANDARDS FOR HEALTH

• CRC § 305.2 Medium relevance — show source text

  A4.305.2 Recycled water piping. Based on projected availability, dual water piping is installed for future use of recycled water at the following locations:

  1. Interior piping for the use of recycled water is installed to serve all water closets, urinals and floor drains.
  2. Exterior piping is installed to transport recycled water from the point of connection to the structure. Recycled water systems shall be designed and installed in accordance with the California Plumbing Code.

  A4.305.3 Recycled water for landscape irrigation. Recycled water is used for landscape irrigation.

  2025 CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDIX A4-13

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  APPENDIX A4 — RESIDENTIAL VOLUNTARY MEASURES

  SECTION A4.306 —INNOVATIVE CONCEPTS AND LOCAL ENVIRONMENTAL CONDITIONS

  A4.306.1 Innovative concepts and local environmental conditions. The provisions of this code are not intended to prevent the use of any alternate material, appliance, installation, device, arrangement, method, design or method of construction not specifically prescribed by this code. This code does not limit the authority of city, county, or city and county government to make necessary changes to the provisions contained in this code pursuant to Section 101.7.1.

  APPENDIX A4-14 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

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  A4 RESIDENTIAL VOLUNTARY MEASURES

  DIVISION A4.4 – MATERIAL CONSERVATION AND RESOURCE EFFICIENCY

  SECTION A4.401—GENERAL (RESERVED)

  SECTION A4.402—DEFINITIONS

  A4.402.1 Definitions. The following terms are defined in Chapter 2.

  ASSEMBLY (ASSEMBLY PRODUCT).

  POSTCONSUMER CONTENT.

  PRECONSUMER (OR POSTINDUSTRIAL) CONTENT.

  PROPORTIONAL RECYCLED CONTENT (PRC M ).

  RECYCLED CONTENT (RC).

  RECYCLED CONTENT VALUE (RCV).

  Assembly products (RCV A ). Materials (RCV M ).

  SECTION A4.403—FOUNDATION SYSTEMS

  A4.403.1 Frost protected foundation systems. As allowed by local conditions, utilize a Frost-Protected Shallow Foundation (FPSF) in compliance with the California Residential Code (CRC). When an FPSF foundation system is installed, the manual required by Section 4.410.1 shall include instructions to the owner or occupant regarding the necessity for heating the structure as required in Section R403.3 of the California Residential Code.

  A4.403.2 Reduction in cement use. As allowed by the enforcing agency, cement used in foundation mix design shall be reduced as follows:

  Tier 1. Not less than a 20 percent reduction in cement use.

  Tier 2. Not less than a 25 percent reduction in cement use.

  Note: Products commonly used to replace cement in concrete mix designs include, but are not limited to:

  1. Fly ash.

  2. Slag.

  3. Silica fume.

  4. Rice hull ash.

  SECTION A4.404—EFFICIENT FRAMING TECHNIQUES

• CRC § 8-6 Medium relevance — show source text

  . . . . . . . . . . . . . . . 8-6 Worksheet (WS-9) 5.409.2 and A5.409.2 Whole Building Life Cycle Assessment: . . . . . . . . . . . . . . . . 8-7 Construction Waste Management (CWM) Plan . . . . . . . . . . . 8-8 Construction Waste Management (CWM) Worksheet. . . . . . 8-9 Construction Waste Management (CWM) Acknowledgment. . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10 Title 23, Waters, California Code of Regulations . . . . . . . . . 8-11 Commissioning Referenced Standards for Non-energy Systems. . . . . . . . . . . . . . . . . . . . . . . . . 8-13 IES TM-15-11 Table A-1, Table 130.2-A and Table 130.2-B Uplight and Glare Ratings Tables. . . . . . . . . . . . . . 8-40

  APPENDIX A4 RESIDENTIAL

  VOLUNTARY MEASURES. . . . . . . . . . . . . . . . . APPENDIX A4-3

  A4.1 Planning and Design . . . . . . . . . . . . . . . . . APPENDIX A4-3 A4.2 Energy Efficiency . . . . . . . . . . . . . . . . . . . . APPENDIX A4-9 A4.3 Water Efficiency and Conservation . . . APPENDIX A4-13 A4.4 Material Conservation and Resource Efficiency . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX A4-15 A4.5 Environmental Quality . . . . . . . . . . . . . . APPENDIX A4-19 A4.6 Tier 1 and Tier 2 . . . . . . . . . . . . . . . . . . . . APPENDIX A4-21

  Division A4.6—Residential Occupancies Application Checklist . . . . . . . . . . . . . APPENDIX A4-23 A4.7 Residential Model Ordinance . . . . . . . . . APPENDIX A4-31

  APPENDIX A5 NONRESIDENTIAL

  VOLUNTARY MEASURES. . . . . . . . . . . . . . . . . APPENDIX A5-3

• CRC § 6.1507 Medium relevance — show source text

  Condenser DT = Leaving Condenser Water Temperature (°F) – Entering Condenser Water Temperature (°F)
  Kadj = 6.1507 – 0.30244(×) + 0.0062692(×)2 – 0.000045595(×)3
  where× = Condenser DT + LIFT
  COPadj = Kadj * COPstd|1. LIFT = Entering Condenser Water Temperature (°F) – Leaving Chilled Water Temperature (°F)
  2. Condenser DT = Leaving Condenser Water Temperature (°F) – Entering Condenser Water Temperature (°F)
  Kadj = 6.1507 – 0.30244(×) + 0.0062692(×)2 – 0.000045595(×)3
  where× = Condenser DT + LIFT
  COPadj = Kadj * COPstd|1. LIFT = Entering Condenser Water Temperature (°F) – Leaving Chilled Water Temperature (°F)
  2. Condenser DT = Leaving Condenser Water Temperature (°F) – Entering Condenser Water Temperature (°F)
  Kadj = 6.1507 – 0.30244(×) + 0.0062692(×)2 – 0.000045595(×)3
  where× = Condenser DT + LIFT
  COPadj = Kadj * COPstd|

  A6.207.1.2 Controls for heat pumps with supplementary electric resistance heaters. Heat pumps with supplementary electric resistance heaters shall have controls:

  A6.207.1.2.1 That prevent supplementary heater operation when the heating load can be met by the heat pump alone; and

  A6.207.1.2.2 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.

  Exceptions: The controls may allow supplementary heater operation during:

  1. Defrost; and
  2. 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.

  A6.207.1.3 Thermostats. All unitary heating and/or cooling systems including heat pumps that are not controlled by a central energy management control system (EMCS) shall have a setback thermostat.

  1. Setback capabilities. All thermostats shall have a clock mechanism that allows the building occupant to program the temperature set points for at least four periods within 24 hours. Thermostats for heat pumps shall meet the requirements of Section A6.207.1.2.

  Exception: 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 need not comply with this requirement. Additionally, room air-conditioner heat pumps need not comply with Section A6.207.1.2. Under perfor

  2025 CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDIX A6.1-17

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  APPENDIX A6.1 — VOLUNTARY STANDARDS FOR HEALTH FACILITIES [OSHPD 1, 2 & 4]

• CRC § 101.7. Medium relevance — show source text

  Green building measures listed in this table may be mandatory if adopted by a city, county, or city and county as specified in Section 101.7.
  2. Required prerequisite for this Tier.
  3. These measures are currently required elsewhere in statute or in regulation.|1. Green building measures listed in this table may be mandatory if adopted by a city, county, or city and county as specified in Section 101.7.
  2. Required prerequisite for this Tier.
  3. These measures are currently required elsewhere in statute or in regulation.|

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  APPENDIX A4-30 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

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  DIVISION A4.7 – RESIDENTIAL MODEL ORDINANCE

  A4.701.1 General. The voluntary measures of this code are designed and promulgated to be adopted by reference and made mandatory by local ordinance pursuant to Section 101.7. Jurisdictions wishing to adopt the voluntary provisions of this code as an enforceable regulation governing structures and premises should ensure that certain factual information is included in the adopting ordinance and that the measures are appropriate and achievable and are considered to be suitable as mandatory by the city, county, or city and county. The following sample adoption ordinance addresses several key elements of a code adoption ordinance, including the information required for insertion into the code text.

  This code does not limit the authority of city, county, or city and county government to make necessary changes to the provisions contained in this code.

  SAMPLE RESOLUTION FOR ADOPTION OF THE TIER 1 OR TIER 2 PROVISIONS OF THE CALIFORNIA GREEN BUILDING STANDARDS CODE WITH OR WITHOUT ADDITIONAL ITEMS NECESSARY TO ADDRESS INNOVATIVE CONCEPTS OR LOCAL ENVIRONMENTAL CONDITIONS.

  ATTACHMENT___.

  SAMPLE RESOLUTION ADOPTING THE CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDICES AS A MANDATORY REFERENCE STANDARD

  CITY OF ________________________

  RESOLUTION # __________________

  RESOLUTION ADOPTING ENHANCED GREEN BUILDING MEASURES FOR NEW AND EXISTING RESIDENTIAL CONSTRUCTION.

  WHEREAS, the City/County of ______’s (City or County) General Plan sets forth goals for preserving and improving the natural and built environment of the City/County, protecting the health of its residents and visitors, and fostering its economy; and

  WHEREAS, green building is a holistic approach to design, construction and demolition that minimizes the building’s impact on the environment, the occupants and the community; and

  WHEREAS, green buildings benefit building industry professionals, residents and communities by improving construction quality; increasing building durability; reducing utility, maintenance, water and energy costs; creating healthier homes; and enhancing comfort and livability; and

  WHEREAS, the California Green Building Standards Code appendices have included voluntary tiers to provide a city, county, or city and county, building professionals, and the general public with a range of voluntary green building measures for builders to choose from when constructing homes in California; and

• CRC § 504.1 Medium relevance — show source text

  APPENDIX A4-28 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  APPENDIX A4 — RESIDENTIAL VOLUNTARY MEASURES

  SECTION A4.602—RESIDENTIAL OCCUPANCIES APPLICATION CHECKLIST—continued

  FEATURE OR MEASURE	LEVELS APPLICANT TO SELECT ELECTIVE MEASURES	Col3	Col4	VERIFICATIONS ENFORCING AGENCY TO SPECIFY VERIFICATION METHOD	Col6	Col7
  FEATURE OR MEASURE	Mandatory	Prerequisites and electives1	Prerequisites and electives1	Enforcing Agency  All	Installer or Designer  All	Third party  All
  FEATURE OR MEASURE	Mandatory	Tier 1	Tier 2	Tier 2	Tier 2	Tier 2
  A4.504.1Use composite wood products made with either California Air Resources Board approved no-added formaldehyde (NAF) resins or ultra-low emitting formaldehyde (ULEF) resins.						
  A4.504.2Install VOC compliant resilient flooring systems. Tier 1. At least 90 percent of the resilient flooring installed shall comply. **Tier 2.**100 percent of the resilient flooring installed shall comply.		2	2			
  A4.504.3Thermal insulation installed in the building shall meet the following requirements: Tier 1. Install thermal insulation in compliance with VOC limits. Tier 2. Install insulation which contains no-added formaldehyde (NAF) and is in compliance with Tier 1.		2	2			
  Interior Moisture Control
  4.505.2Vapor retarder and capillary break is installed at slab-on- grade foundations.						
  4.505.3 Moisture content of building materials used in wall and floor framing is checked before enclosure.						
  Indoor Air Quality and Exhaust
  4.506.1 Each bathroom shall be provided with the following: 1. ENERGY STAR fans ducted to terminate outside the building. 2. Fans must be controlled by a humidity control (separate or built- in); OR functioning as a component of a whole-house ventilation system. 3.