Title 24 · California Energy Code

When may default mandatory efficiency levels or Commission-approved procedures be used instead of database records?

If you can’t find a product’s certified record in the Energy Commission database (or an equivalent directory), or if required field‑test protocols don’t exist or the appliance was site‑modified, California’s code lets you either assume the Part 6 minimum efficiency (the “default”) or follow a procedure the Commission has approved under § 10-109 to prove compliance; document your database search and cite § 110.1(c).

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Last reviewed: July 6, 2026

What the code requires — 2-4 sentences

In plain English: when you cannot verify an appliance’s efficiency from the Energy Commission’s certified-appliance database (or an equivalent federal or approved trade-association directory), the code allows you to either (a) use the default mandatory efficiency levels in Part 6, or (b) follow procedures approved by the Commission under § 10-109 (Part 1) to show compliance. The controlling rule is § 110.1(c) of the California Energy Code.

If a certified-directory record isn’t available, or if field-testing protocols aren’t approved or the appliance was site-modified (or a DOE test-waiver leaves the method unspecified), demonstrate compliance by defaulting to the Part 6 mandatory efficiency levels or by using a Commission‑approved procedure per § 10-109.

Requirements in detail

Key defined terms (first mention bolded)

  • Database — the Energy Commission’s database of certified appliances (or an equivalent federal or approved trade-association directory).
  • Default mandatory efficiency levels — the minimum efficiency values specified in Part 6 that may be applied as a conservative assumption when a certified record is not available.
  • Commission‑approved procedures — protocols, calculation methods, or field test procedures approved by the Commission under § 10-109 (Title 24, Part 1). References to § 10-109 appear throughout Part 6 (e.g., compliance software and modeling rules).

When § 110.1(c) lets you use defaults or approved procedures

The code explicitly lists four situations in which you may demonstrate conformance by default or by following a Commission‑approved procedure (all in § 110.1(c)):

  • No certified-data available — data to verify efficiency is not available in the Energy Commission database, a federal directory, or an approved trade-association directory.
  • No approved field test protocol — field verification and diagnostic testing is required but the Energy Commission has not approved an applicable protocol for that appliance.
  • Site-modified appliances — the appliance was site‑modified (after manufacture) in a way that affects performance, even though it otherwise meets certification requirements.
  • DOE waiver without method — the U.S. DOE has granted a waiver from federal test procedures but the waiver does not specify how to determine efficiency.

Decision-relevant table

Decision dimension Trigger / value What to do Code Reference
Certified product record present? Yes / No If Yes, use the Energy Commission database (or equivalent directory). If No, see next rows. § 110.1(b) & § 110.1(c)
Field verification required but protocol not approved Protocol exists / not exists If not exists, use default mandatory levels or Commission‑approved procedure per § 10-109. § 110.1(c)1–2
Appliance site-modified Site‑modified? Yes → performance affected Use default mandatory levels or Commission‑approved procedures to demonstrate conformance. § 110.1(c)3
DOE waiver granted but test method unspecified Waiver specifies method? No Use default mandatory levels or Commission‑approved procedure. § 110.1(c)4
What are “Commission‑approved procedures”? See Part 1 § 10-109 Follow procedures approved under § 10-109 (e.g., approved compliance software, ACM methods, or approved field‑test procedures). Note: Part 6 repeatedly links modeling and compliance methods to § 10-109.

How to document the choice

  • Cite § 110.1(c) on the Certificate of Compliance and in permit submittals when you rely on a default or a Commission‑approved procedure.
  • If you rely on a Commission‑approved procedure, identify the exact document, approval date, and the § 10-109 approval reference (if available). Part 6 ties compliance software and modeling rules back to § 10-109(c).

Exceptions & special cases

  • Using the database is still the default path: § 110.1(b) requires verification from the Energy Commission database (or equivalent) unless one of the § 110.1(c) situations applies. Don’t skip the database search.
  • Part 6 and the reference appendices also reference § 10-109(c) for modeling rules and “existing efficiency level” handling; projects using performance software must follow the Commission‑certified software and methods approved under § 10-109.
  • If the Energy Commission later issues an applicable test protocol or database entry, you must follow that approved method or record for future installations — § 110.1(b)/(c) contemplates updates and approved protocols.

Common mistakes

  • Assuming defaults may be used whenever a product is “hard to find” online — the code requires an actual failure to locate a certified record in the Energy Commission database (or equivalent directory) before defaulting. Always document your search.
  • Using your own field test method without Commission approval — if no Commission protocol exists, you must either use the Part 6 default mandatory level or obtain/ follow a procedure approved under § 10-109; ad hoc methods risk noncompliance.
  • Forgetting to note site modifications — when a certified appliance is modified on site in a way that affects performance, you cannot rely on the manufacturer’s certified record alone; § 110.1(c) covers this.

Worked example — concrete scenario (illustrative numbers)

Note: the specific mandatory efficiency numeric values from Part 6 are not reproduced here (the retrieved files show the rule but not a numeric table). The math below is an illustrative application of the decision rule in § 110.1(c).

Scenario:

  • A commercial kitchen installer proposes a new refrigerated display case but cannot find a certified record in the Energy Commission database or an approved directory after a documented search. (Trigger: no database record.)
  • The applicable Part 6 mandatory minimum for this class of case (hypothetical for illustration) is 2.5 kWh/day (call this the mandatory baseline). The manufacturer’s nameplate does not list the Energy Commission certification number.
    Action under § 110.1(c): use the default mandatory level (assume the case meets 2.5 kWh/day) or follow a Commission‑approved procedure under § 10-109 if such a procedure exists. Document: (1) your database search steps; (2) citation to § 110.1(c); (3) the chosen default value and its Part 6 citation (or the identified § 10-109 procedure).

How the outcome is evaluated:

  • If your calculation using the default (2.5 kWh/day) shows the building still meets the performance/prescriptive requirement, permit moves forward.
  • If not, you must revise equipment selection or obtain an Energy Commission‑approved testing procedure (per § 10-109) to demonstrate a better efficiency.

Related provisions

  • § 110.1(b) — requirement to verify conformance using the Energy Commission database or equivalent directories (reference to the database path).
  • § 100.1 — definitions and rules of construction used across Part 6 (relevant to defined terms).
  • § 150.1 — performance approach and references to compliance software and § 10-109(c).
  • § 10-103 — documentation and Certificates of Compliance/Verification (where you report how you demonstrated compliance).
  • § 10-115 — Energy Commission approvals tied to community/shared options (example of other Part 1 approvals referenced by Part 6).

Note on § 10-109 text availability: the retrieved documents reference § 10-109 repeatedly (for approval of compliance software and procedures) but the complete text of § 10-109 itself was not included in the files provided to me. Where Part 6 points you to § 10-109 (for example, for compliance software and modeling rules), those references are shown in the retrieved materials. For the exact procedural language of § 10-109 you should consult Title 24, Part 1, § 10-109 directly from the Commission or the official Title 24 Part 1 text.

Code references

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

  • § 110.1 High relevance — show source text

    SECTION 110.1—MANDATORY REQUIREMENTS FOR APPLIANCES

    (a) 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.

    (b) 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:

    1. 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
    2. An equivalent directory published by a federal agency; or
    3. An approved trade association directory as defined in Title 20 California Code of Regulations Section 1606(h).

    (c) 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:

    1. 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
    2. 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
    3. The appliance meets the requirements of Section 110.1(a) but has been site-modified in a way that affects its performance; or

    2025 CALIFORNIA ENERGY CODE 39

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

    1. 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 , 2 5402.8, 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.

    (a) Efficiency. Equipment shall meet the applicable efficiency requirements in Tables 110.2-A through 110.2-L, subject to the following:

    1. If more than one efficiency standard is listed for any equipment in Tables 110.2-A through 110.2-L, the equipment shall meet all the applicable standards that are listed; and
    2. If more than one test method is listed in Tables 110.2-A through 110.2-L, the equipment shall comply with the applicable efficiency standard when tested with each listed test method; and
  • § 25218.5 Medium relevance — show source text

    (b) Certification Requirements for Manufactured Systems, Equipment, Appliances and Building Components.

    1. 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
    2. 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: A. All the information provided pursuant to the certification is true, complete, accurate and in compliance with all applicable requirements of Part 6; and B. The equipment, product, or device was tested using the test procedure specified in Part 6 if applicable
    3. The certification status of any system, equipment, appliance or building component shall be confirmed only by reference to: A. A directory published or approved by the Commission; or B. A copy of the application for certification from the manufacturer and the letter of acceptance from the Commission staff; or C. Written confirmation from the publisher of a Commission-approved directory that a device has been certified; or D. 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 , 2 5402.8, and 25943, Public Resources Code.

    SECTION 110.1—MANDATORY REQUIREMENTS FOR APPLIANCES

    (a) 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.

    (b) 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:

    1. 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
    2. An equivalent directory published by a federal agency; or
    3. An approved trade association directory as defined in Title 20 California Code of Regulations Section 1606(h).

    (c) 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:

    1. 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
    2. 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
  • § 201.1 Medium relevance — show source text

    DIVISION A5.2 – ENERGY EFFICIENCY

    (Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)

    Adopting agency BSC BSC-
    CG    		 SFM HCD Col6 Col7 DSA Col9 OSHPD Col11 Col12 Col13 Col14 Col15 BSCC DPH AGR DWR CEC CA SL SLC
    Adopting agency BSC BSC-
    CG    		 SFM 1 2 1/AC AC SS 1 1R 2 3 4 5 5 5 5 5 5 5 5 5
    Adopt entire CA chapter
    Adopt entire chapter as
    amended (amended
    sections listed below)
    Adopt only those sections that
    are listed below    		 X
    Chapter/Section
    Appendix A5.2 X

    2025 CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDIX A5-11

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    APPENDIX A5-12 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

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    A5 NONRESIDENTIAL VOLUNTARY MEASURES

    DIVISION A5.2 – ENERGY EFFICIENCY

    SECTION A5.201—GENERAL

    A5.201.1 Scope. For the purposes of mandatory energy efficiency standards in this code, the California Energy Commission will continue to adopt mandatory standards. 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 findings 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 modifications 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/building-energy-efficiency-standards/2025-building-energy-efficiency

    SECTION A5.202—DEFINITIONS

    A5.202.1 Definitions. The following terms are defined in Chapter 2.

    ENERGY BUDGET.

    GEOTHERMAL.

  • § 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

  • § 1-12 Medium relevance — show source text

    1.9 Division of the State Architect . . . . . . . . . . . . . . . . . . . . 1-12

    1.10 Department of Health Care Access and Information/Office of Statewide Hospital Planning and Development . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

    1.11 Office of the State Fire Marshal . . . . . . . . . . . . . . . . . . . 1-15

    1.12 State Librarian. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20

    1.13 Department of Water Resources . . . . . . . . . . . . . . . . . . 1-20

    1.14 California State Lands Commission . . . . . . . . . . . . . . . 1-20

    DIVISION II – SCOPE AND ADMINISTRATION . . . . . . . . . . . . . . . . . 1-21

    PART 1—SCOPE AND APPLICATION. . . . . . . . . . . . . . . . . . . . . . . 1-21

    101 Scope and General Requirements. . . . . . . . . . . . . . . 1-21

    102 Applicability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22

    PART 2—ADMINISTRATION AND ENFORCEMENT . . . . . . . . . . . 1-22

    103 Code Compliance Agency . . . . . . . . . . . . . . . . . . . . . . 1-22

    104 Duties and Powers of Code Official. . . . . . . . . . . . . . 1-22

    105 Permits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25

    106 Construction Documents . . . . . . . . . . . . . . . . . . . . . . 1-26

    107 Temporary Uses, Equipment and Systems. . . . . . . 1-28

    108 Fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28

    109 Inspections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28

    110 Certificate of Occupancy. . . . . . . . . . . . . . . . . . . . . . . 1-30

    111 Service Utilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-30

    112 Means of Appeals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-30

  • § 170.1 Medium relevance — show source text

    A. The Efficiency LSC energy is the sum of the LSC energy for space-conditioning, water heating, mechanical ventilation, 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. 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. A. 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 170.2-K or specified for the standard

    2025 CALIFORNIA ENERGY CODE 237

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    MULTIFAMILY BUILDINGS—PERFORMANCE AND PRESCRIPTIVE COMPLIANCE APPROACHES

    design, the installed system shall be field verified in accordance with the procedures specified in the applicable sections of Reference Residential Appendix RA3. B. 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.

    C. 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. D. Thermal balancing valve. When performance compliance requires installation of thermal balancing valves with variable speed circulation pump(s), the installation shall meet the procedures specified in Reference Residential Appendix RA4.4.3. E. Heat pump—rated heating capacity.

  • § 3.6 Medium relevance — show source text

    2, 6, 9,
    18, 20, 21|21/2| |W-8-M-43|85/8″|Core: clay or shale structural tile; facings: exposed
    side only; see Note 17.|See
    notes|1 hr
    30 min||1||1, 2, 6, 9,
    19, 20, 21|11/2| |W-8-M-44|85/8″|Core: clay or shale structural tile; facings: side 1, see
    Note 17; side 2, none.|See
    notes|3 hrs||1||1, 2, 6, 10,
    18, 20, 21|3| |W-8-M-45|85/8″|Core: clay or shale structural tile; facings: fire side
    only; see Note 17.|See
    notes|1 hr
    30 min||1||1, 2, 6, 10,
    19, 20, 21|11/2| |W-8-M-46|85/8″|Core: clay or shale structural tile; facings: side 1, see
    Note 17; side 2, none.|See
    notes|3 hrs
    30 min||1||1, 2, 6, 12,
    18, 20, 21|31/2| |W-8-M-47|85/8″|Core: clay or shale structural tile; facings: exposed
    side only; see Note 17.|See
    notes|1 hr
    45 min||1||1, 2, 6, 12,
    19, 20, 21|13/4| |W-8-M-48|85/8″|Core: clay or shale structural tile; facings: side 1, see
    Note 17; side 2, none.|See
    notes|4 hrs||1||1, 2, 6, 16,
    18, 20, 21|4| |W-8-M-49|85/8″|Core: clay or shale structural tile; facings: fire side
    only; see Note 17.|See
    notes|2 hrs||1||1, 2, 6, 16,
    19, 20, 21|2| |W-8-M-50|85/8″|Core: 4″, 40% solid clay or shale clay structural tile;
    4″ brick plus5/8″ of 1:3 sanded gypsum plaster
    facings on one side.|See
    notes|4 hrs||1||1, 20|4| |W-8-M-51|83/4″|83/4″ × 21/2″ and 4″ × 21/2″ cellular fletton (1873 psi)
    single and triple cell hollow brick set in1/2″ sand
    mortar in alternate courses.|3.6
    tons/ft|6 hrs|||7|23, 29|6| |W-8-M-52|83/4″|83/4″ thick cement brick (2527 psi) with Portland
    cement and sand mortar.|3.6
    tons/ft|6 hrs|||7|23,

  • § 62.1. Medium relevance — show source text

    1. Of Class 4 as defined in ASHRAE Standard 62.1.

    2. Systems expected to operate less than 20 hours per week.

    A5.203.1.2 Performance standard. Comply with one of the advanced efficiency levels indicated below.

    A5.203.1.2.1 Tier 1. Buildings complying with the first 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 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.
    2. For nonresidential building projects that include indoor lighting and mechanical systems: 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.

    APPENDIX A5-14 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

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    APPENDIX A5 — NONRESIDENTIAL VOLUNTARY MEASURES

    1. 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.

    A5.203.1.2.2 Tier 2. 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.

  • § 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.

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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

  • § 201.1 Medium relevance — show source text

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    A5 NONRESIDENTIAL VOLUNTARY MEASURES

    DIVISION A5.2 – ENERGY EFFICIENCY

    SECTION A5.201—GENERAL

    A5.201.1 Scope. For the purposes of mandatory energy efficiency standards in this code, the California Energy Commission will continue to adopt mandatory standards. 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 findings 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 modifications 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/building-energy-efficiency-standards/2025-building-energy-efficiency

    SECTION A5.202—DEFINITIONS

    A5.202.1 Definitions. The following terms are defined in Chapter 2.

    ENERGY BUDGET.

    GEOTHERMAL.

    LONG-TERM SYSTEM COST (LSC).

    PROCESS.

    RECOVERED ENERGY, ON-SITE.

    SOLAR ACCESS.

    SOLAR POOL HEATING SYSTEM.

    SECTION A5.203—PERFORMANCE APPROACH

    A5.203.1 Energy efficiency. Nonresidential, high-rise residential and hotel/motel buildings that include lighting and/or mechanical systems shall comply with Sections A5.203.1.1 and A5.203.1.2. Newly constructed buildings and additions are included in the scope of these sections. Buildings permitted without lighting or mechanical systems shall comply with Section A5.203.1.1 but are not required to comply with Section A5.203.1.2.

    A5.203.1.1 Tier 1 and Tier 2 prerequisites. To comply with Tier 1, ONE of the following efficiency measures is required for all applicable components of the building project. To comply with Tier 2, TWO of the following efficiency measures are required.

    A5.203.1.1.1 Outdoor lighting. Outdoor lighting requirements are described below.

    A5.203.1.1.1.1 Newly installed outdoor lighting power shall be no greater than 90 percent of the Allowed Outdoor Lighting Power, and general hardscape lighting within the scope of Title 24, Part 6, Section 140.7(b)1 shall have a color temperature no higher than 3000K. The Allowed Outdoor Lighting Power calculation is specified in Title 24, Part 6, Section 140.7, Requirements for Outdoor Lighting.

    Exception to Section A5.203.1.1.1.1:

  • § 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.

    1. 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.

  • § 25402.1 Medium relevance — show source text
    1. The city, county, or city and county shall obtain California Energy Commission approval for any energy- related ordinances consistent with Public Resources Code Section 25402.1(h)(2) and Title 24, Part 1, Section 10-106. Local governmental agencies may adopt and enforce energy standards for newly constructed buildings, additions, alterations and repairs, provided the California Energy Commission finds that the standards will require buildings to be designed to consume no more energy than permitted by Part 6. Such local standards include, but are not limited to, adopting the requirements of Part 6 before their effective date, requiring additional energy conservation measures, or setting more stringent energy budgets.

    101.8 Alternate materials, designs and methods of construction. 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, provided that any such alternative has been approved. An alternate shall be approved on a case-by-case basis where the enforcing agency finds that the proposed alternate is satisfactory and complies with the intent of the provisions of this code and is at least the equivalent of that prescribed in this code in planning and design, energy, water, material conservation and resource efficiency, environmental air quality, performance, safety and the protection of life and health. Consideration and compliance provisions for occupancies regulated by adopting state agencies are found in the sections listed below.

    1. Section 1.2.3 in the California Building Code (CBC) for the California Building Standards Commission.
    2. Section 104.2.3 in the California Building Code (CBC) for the Division of the State Architect.
    3. Section 1.8.7 in the California Building Code (CBC); and Section 1.8.7 in the California Residential Code (CRC) for the Department of Housing and Community Development.
    4. Section 7-104 in the California Administrative Code for the Office of the Statewide Health Planning and Development.

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    ADMINISTRATION

    101.9 Effective date of this code. Only those standards approved by the California Building Standards Commission that are effective at the time an application for a building permit is submitted shall apply to the plans and specifications for, and to the construction performed under, that permit. For the effective dates of the provisions contained in this code, see the appropriate application checklist and the History Note page of this code.

    101.10 Mandatory requirements. This code contains both mandatory and voluntary green building measures. Mandatory and voluntary measures are identified in the appropriate application checklist contained in this code.

    101.11 Effective use of this code. The following steps shall be used to establish which provisions of this code are applicable to a specific occupancy:

    1. Establish the type of occupancy.
    2. Verify which state agency has authority for the established occupancy by reviewing the authorities list in Sections 103 through 106.
    3. Once the appropriate agency has been identified, find the chapter which covers the established occupancy.
    4. The Matrix Adoption Tables at the beginning of Chapters 4 and 5 identify the mandatory green building measures necessary to meet the minimum requirements of this code for the established occupancy.
    5. Voluntary tier measures are contained in Appendix Chapters A4 and A5. A checklist containing each green building measure, both required and voluntary, is provided at the end of each appendix chapter.
  • § 10-109 Medium relevance — show source text
    1. The standard design shall assume the same geometry and orientation as the proposed design.
    2. The “existing efficiency level” modeling rules, including situations where nameplate data are not available, are described in Sections 10-109(c) and 10-116. 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.

    (c) 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 .

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    CALIFORNIA MECHANICAL CODE, CALIFORNIA CODE OF REGULATIONS, TITLE 24, PART 4, CHAPTER 6, DUCT SYSTEMS

    CALIFORNIA MECHANICAL CODE, CALIFORNIA CODE OF REGULATIONS, TITLE 24, PART 4, CHAPTER 6, DUCT SYSTEMS

    TABLE P4-A ADOPTION TABLE Col2 Col3
    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). 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). 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).

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    10 MULTIFAMILY BUILDINGS—MANDATORY REQUIREMENTS

    SECTION 160.0—GENERAL

  • § 130.5 Medium relevance — show source text

    Exception 2 to Section 130.5(d): Receptacles in healthcare facilities.

    (e) 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. Reference: Sections 25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and 25943, Public Resources Code.

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    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: (a) The requirements of Sections 100.0 through 110.12 applicable to the building project (mandatory measures for all buildings). (b) The requirements of Sections 120.0 through 130.5 (mandatory measures for nonresidential and hotel/motel buildings). (c) 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 140.1—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.

  • § 10-109 Medium relevance — show source text

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

    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 ft [2] -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.

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    ALL OCCUPANCIES—GENERAL PROVISIONS

    RECOVERED ENERGY, ON-SITE is recovered energy that is captured at the building site.

    REFERENCE APPENDICES is the support document for the Building Energy Efficiency Standards. 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.

  • § 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.

  • § 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.

  • § 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.
  • § 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.

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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.

  • § 110.2 Medium relevance — show source text

    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 air flow 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.

    COMPARTMENTALIZATION is when a dwelling unit enclosure area, including walls, ceilings, and floors shared with exterior spaces or adjacent spaces in the building, including but not limited to neighboring units, corridors, and elevator shafts, is constructed to prevent air leakage.

    10 2025 CALIFORNIA ENERGY CODE

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

    ALL OCCUPANCIES—GENERAL PROVISIONS

    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/ft [2] (215 watts/m [2] ) 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.

Frequently asked questions

When must I try the Energy Commission database before using defaults?

Always first. § 110.1(b) requires verification via the Energy Commission’s database (or an equivalent federal or approved trade association directory) except where the situations in § 110.1(c) apply.

If an appliance was modified on-site, do I always default to Part 6 mandatory values?

If the site modification affects performance, § 110.1(c) allows demonstration by default to Part 6 mandatory levels or by a Commission‑approved procedure under § 10-109; you must document the modification and your chosen method.

What is a “Commission‑approved procedure” in practice?

Part 6 ties approved procedures to approvals made under § 10-109 (e.g., approved compliance software, ACM methods, or field-test protocols). The retrieved Part 6 text references § 10-109 but the full § 10-109 text was not present in the provided files; consult § 10-109 directly for the procedural details.

Can I create my own test protocol and apply it?

Not without Commission approval. If no approved protocol exists you must either use the Part 6 default mandatory levels or submit a procedure for Commission approval under § 10-109.

Where do I show this on permit documents?

Record your search and justification on the Certificate(s) of Compliance / Verification and the permit submittal, citing § 110.1(c) and the specific Part 6 references; if using a § 10-109 approved procedure, identify that approval.

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