Title 24 · California Energy Code

What must the manufacturer's certification/declaration state?

Manufacturers must provide a signed declaration under penalty of perjury saying the certification information is true, complete, complies with the California Energy Code Part 6, and — when a Part 6 test method exists — that the product was tested using that method; appliances subject to Title 20 must also meet Section 1608(a).

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Last reviewed: July 6, 2026

What the code requires — plain English (controlling §)

Manufactured systems, equipment, appliances and building components that Part 6 requires to be certified must be accompanied by a manufacturer’s declaration executed under penalty of perjury that (1) the information provided is true, complete and accurate and in compliance with Part 6, and (2) the product was tested using the test procedure specified in Part 6, when a test procedure applies. This is the requirement in § 110.0(b)2. For appliances specifically regulated under the Appliance Efficiency Regulations, the appliance may be installed only if it fully complies with Section 1608(a) of the Title 20 regulations (see § 110.1(a)).

The manufacturer's signed declaration must state, under penalty of perjury, that the certification information is complete and correct and that the product was tested using the Part 6 test method where applicable.

Requirements in detail

Core statements the declaration must include

  • A declaration executed under penalty of perjury by the manufacturer that all certification information is true, complete, accurate and in compliance with all applicable requirements of Part 6. (Required by § 110.0(b)2(A).)
  • A statement that the equipment, product, or device was tested using the test procedure specified in Part 6, if a test procedure is applicable to that product. (Required by § 110.0(b)2(B).)

Bold, defined terms used above (first appearance): manufacturer, declaration, penalty of perjury, Part 6, test procedure, Section 1608(a).

Who must sign / how it must be executed

  • The declaration must be a manufacturer’s declaration executed under penalty of perjury under the laws of the State of California (text requirement in § 110.0(b)2). The Code treats that declaration as the manufacturer’s certification of compliance.

How conformance is verified (where installers / plan reviewers look)

  • Certification status is confirmed by reference to an Energy Commission directory or equivalent documentation (e.g., Commission database, application-and-acceptance letter, publisher confirmation, or Commission-approved label) per § 110.0(b)3. For appliances, conformance must be shown to meet Title 20/Section 1608(a) prior to installation (see § 110.1(a)).

Decision-relevant summary table

Declaration item required Decision‑relevant value / phrase to include Code Reference
Statement of truth/completeness “All information provided pursuant to the certification is true, complete, accurate and in compliance with Part 6.” § 110.0(b)2(A)
Test-procedure statement (if applicable) “The equipment, product, or device was tested using the test procedure specified in Part 6.” § 110.0(b)2(B)
Execution form Signed and executed under penalty of perjury under the laws of the State of California § 110.0(b)2
Appliance specific compliance Appliance may only be installed if it fully complies with Section 1608(a) (Title 20). § 110.1(a)
How to confirm certification Confirm via Energy Commission directory, copy of application + acceptance letter, publisher confirmation, or Commission-approved label. § 110.0(b)3

Exceptions & special cases

  • Appliances inside Title 20 Section 1601’s scope: these appliances must be certified to the Energy Commission under Title 20 procedures (see § 110.0(b)1 and § 110.1(a)). In practice that means appliances subject to Title 20 have their own certification route and must meet Section 1608(a) before installation.
  • If no Part 6 test procedure applies to the product, the test‑procedure statement is not required; the declaration must still assert truth/completeness and Part 6 compliance. The Code text conditions the test-statement on applicability of a Part 6 test method (see § 110.0(b)2(B)).
  • Confirmation of certification can be done several ways (Energy Commission directory, application+acceptance, publisher confirmation, or Commission-approved label) — installers or enforcement officials should use those authorized sources to verify status before accepting the product on a job. Do not rely on informal manufacturer claims alone.

Common mistakes

  • Omitting the penalty of perjury language or failing to have an authorized manufacturer signature; the declaration must be signed and executed under penalty of perjury per § 110.0(b)2.
  • Forgetting to state that the product was tested using the Part 6 test procedure when one exists — if you omit this and a test method applies, the declaration is incomplete. See § 110.0(b)2(B).
  • Treating the manufacturer’s label or brochure as the same as the required declaration — only the signed manufacturer declaration executed under penalty of perjury satisfies § 110.0(b)2 (though a Commission‑approved label or Commission directory entry will show certified status per § 110.0(b)3).
  • Installing appliances subject to Title 20 without confirming full compliance with Section 1608(a) — appliances regulated under Title 20 have a compliance requirement distinctively referenced in § 110.1(a).

Worked example — concrete scenario with numbers

Scenario: A manufacturer sells a packaged heat pump (not an appliance covered under Title 20 §1601) that is required by Part 6 to be certified.

  1. Manufacturer’s declaration contents:

    • Signed statement: “I declare under penalty of perjury that all information provided pursuant to the certification is true, complete and accurate and in compliance with all applicable requirements of Part 6.” (satisfies § 110.0(b)2(A))
    • Test statement: The declaration includes: “This unit was tested per the Part 6 test method X-123 on 2026-05-10; measured COP (heating) = 3.5, SEER = 16.0.” (satisfies § 110.0(b)2(B) because a Part 6 test method applies.)
    • Execution: The declaration is dated 2026-05-20 and signed by the manufacturer’s responsible officer, with the penalty‑of‑perjury language included. (satisfies execution requirement in § 110.0(b)2.)

  2. Installer/plan reviewer action:

    • The installer checks the Energy Commission directory (or Commission-approved label or acceptance letter) to confirm the unit’s certification entry (per § 110.0(b)3). If the directory shows the model listed, the installer may proceed.

  3. If the product had been an appliance covered by Title 20 §1601, the installer would instead confirm the appliance “fully complies with Section 1608(a)” before installation (per § 110.1(a)).

Related provisions

  • § 110.0(a) — General requirement that manufacturer must certify systems/equipment before installation.
  • § 110.0(b)1 — Appliances in the scope of Title 20 §1601 must be certified to the Energy Commission under Title 20 procedures.
  • § 110.0(b)3 — How certification status is to be confirmed (Energy Commission directory, application+acceptance, publisher confirmation, or Commission‑approved label).
  • § 110.1(a) — Appliance installations: appliances regulated by the Appliance Efficiency Regulations may be installed only if they fully comply with Title 20 §1608(a).
  • Definitions: “CERTIFIED TO THE ENERGY COMMISSION” — when used outside Title 20 appliances, this means certified by manufacturer in a declaration executed under penalty of perjury and, if applicable, tested under the applicable Part 6 test method. (See the definitions section for the phrase.)

Code references

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

  • § 100.1 High relevance — show source text

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    ALL OCCUPANCIES—GENERAL PROVISIONS

    FIGURE 100.1-A CALIFORNIA CLIMATE ZONES

    Climate Zones for Residential and Nonresidential Occupancies

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    2 ALL OCCUPANCIES—MANDATORY REQUIREMENTS FOR THE

    MANUFACTURE, CONSTRUCTION AND INSTALLATION OF SYSTEMS, EQUIPMENT AND BUILDING COMPONENTS

    SECTION 110.0—SYSTEMS AND EQUIPMENT—GENERAL

    Sections 110.1 through 110.12 specify requirements for manufacturing, construction and installation of certain systems, equipment, appliances and building components that are installed in buildings within the scope of Section 100.0(a).

    Note: The requirements of Sections 110.0 through 110.12 apply to newly constructed buildings. Sections 141.0 and 150.2 specify which requirements of Sections 110.1 through 110.12 also apply to additions and alterations to existing buildings.

    (a) General Requirements. Systems, equipment, appliances and building components shall only be installed in a building within the scope of Section 100.0(a) regulated by Part 6 only if:

    1. The manufacturer has certified that the system, equipment, appliances or building component complies with the applicable manufacturing provisions of Sections 110.1 through 110.12; and
    2. The system, equipment, appliance or building component complies with all applicable installation provisions of Sections 110.1 through 110.12.

    (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.

  • § 25218.5 High 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
  • § 25920-25922 High relevance — show source text

    Authority: Sections 25402(a) and 25920, Public Resources Code.

    Reference: Sections 25920-25922, Public Resources Code.

    HISTORY:

    1. Amendment of subsection (a) (9) filed 4-2-79; effective thirtieth day thereafter (Register 79, No. 14).
    2. Editorial correction of subsection designations with subsection (l) (4) (Register 79, No. 17).
    3. Amendment filed 8-10-81; designated effective 9-22-81 (Register 81, No. 33).
    4. New subsection (m) (2) (J) filed 9-11-81; effective thirtieth day thereafter (Register 81, No. 37).
    5. Editorial correction of subsection (k) (3) (B) filed 1-13-82 (Register 82, No. 3).
    6. Amendment of subsections (a) (5) and (a) (8) filed 5-5-82; effective thirtieth day thereafter (Register 82, No. 19).
    7. Editorial correction of subsection (m) printing error (Register 82, No. 44).

    APPROVAL OF TESTING LABORATORIES

    Sec. 12-13-1554.

    (a) Except as provided in subsection (b), laboratories shall be approved using the procedures described in the Criteria for the Approval of Testing Laboratories, dated October 27, 1978. The Executive Director shall approve any laboratory that meets the standards described in the Criteria for the Approval of Testing Laboratories, dated October 27, 1978. A testing laboratory shall have the right to appeal to the full Commission any denial of approval by the Executive Director.

    (b) Up to and including September 30, 1982, laboratories shall be approved either upon accreditation by the United States Department of Commerce National Voluntary Laboratory Accreditation Program or as stated in the preceding paragraph, at the manufacturer’s option. After September 30, 1982, laboratories shall only be approved upon accreditation by the United States Department of Commerce National Voluntary Laboratory Accreditation Program.

    Authority: Section 25218(e), Public Resources Code.

    Reference: Sections 25915(a) and 25921, Public Resources Code.

    HISTORY:

    1. Amendment filed 8-10-81, designated effective 9-22-81 (Register 81, No. 33).

    CERTIFICATION

    Sec. 12-13-1555.

    (a) No insulating material shall be sold or installed in California on or after September 22, 1981, unless the manufacturer has certified that the material complies with the provisions of this article.

    (b) The manufacturer shall submit a certification statement to the Executive Director for each type of insulating material. Such statement shall contain the following information:

    1. Name of the manufacturer.

    2. A description of the type of insulating material being certified in sufficient detail to permit its identification. The description may include information sheets, brochures, a sample label for the product or similar information.

    3. Test results from an approved laboratory.

    4. A description of the basis for ensuring that all the insulating material of the type being certified complies with the requirements of this article. Such description shall include, but not be limited to a description of the frequency of testing of the material, the quality assurance program, and any third-party inspections or testing used by the manufacturer.

    5. A declaration that the insulating material complies with the requirements of this article.

  • § 8-10 High relevance — show source text

    (b) Up to and including September 30, 1982, laboratories shall be approved either upon accreditation by the United States Department of Commerce National Voluntary Laboratory Accreditation Program or as stated in the preceding paragraph, at the manufacturer’s option. After September 30, 1982, laboratories shall only be approved upon accreditation by the United States Department of Commerce National Voluntary Laboratory Accreditation Program.

    Authority: Section 25218(e), Public Resources Code.

    Reference: Sections 25915(a) and 25921, Public Resources Code.

    HISTORY:

    1. Amendment filed 8-10-81, designated effective 9-22-81 (Register 81, No. 33).

    CERTIFICATION

    Sec. 12-13-1555.

    (a) No insulating material shall be sold or installed in California on or after September 22, 1981, unless the manufacturer has certified that the material complies with the provisions of this article.

    (b) The manufacturer shall submit a certification statement to the Executive Director for each type of insulating material. Such statement shall contain the following information:

    1. Name of the manufacturer.

    2. A description of the type of insulating material being certified in sufficient detail to permit its identification. The description may include information sheets, brochures, a sample label for the product or similar information.

    3. Test results from an approved laboratory.

    4. A description of the basis for ensuring that all the insulating material of the type being certified complies with the requirements of this article. Such description shall include, but not be limited to a description of the frequency of testing of the material, the quality assurance program, and any third-party inspections or testing used by the manufacturer.

    5. A declaration that the insulating material complies with the requirements of this article.

    6. The wording of the certification seal, if such seal consists of a statement pursuant to Section 1557 (b) (2) of this article.

    (c) Every certification statement shall be dated and signed by the manufacturer attesting to its truth and accuracy. Where the manufacturer is either a corporation or a business association, the certification statement shall be dated, signed and attested to by a responsible official thereof.

    (d) Within 45 days after receipt of a certification statement, the Executive Director shall forward, to the manufacturer, an acknowledgment that the statement has been received and that it is complete and accurate on its face.

    (e) Certification of the insulation material shall be deemed to occur upon forwarding of the acknowledgement by the Executive Director. If acknowledgment is not forwarded in a timely manner, certification shall be deemed to occur on the 45th day after receipt of the certification statement.

    (f) The statement of test results required in the certification may be based upon tests conducted prior to the adoptive date of this article if: (1) the same test was conducted within two years of the date of adoption, (2) the laboratory at which the tests were

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    STANDARDS FOR INSULATING MATERIAL

    conducted has been approved for those tests as of the date of the certification statement, and (3) the laboratory certifies that the test and product are the same as the test and product referred to in the statement of test results.

    Authority: Section 25218(e), Public Resources Code.

    Reference: Sections 25921 and 25921.1, Public Resources Code.

    HISTORY:

  • § 13.3 High relevance — show source text

    CERTIFIED TO THE ENERGY COMMISSION means, when used in association with appliances, certified under Section 1606 of Title 20 of the California Code of Regulations; and otherwise means certified by the manufacturer in a declaration, executed under penalty of perjury under the laws of the State of California, that all the information provided pursuant to the certification is true, complete, accurate and in compliance with all applicable provisions of Part 6; and if applicable that the equipment, product or device was tested under the applicable test method specified in Part 6.

    CERTIFYING ORGANIZATION is an independent organization recognized by the Commission to certify manufactured devices for performance values in accordance with procedures adopted by the Commission.

    CIE 13.3 is the International Commission on Illumination (Commission Internationale de l’Eclairage) document titled “Method of Measuring and Specifying Colour Rendering Properties of Light Sources,” 1995 (CIE 13.3-1995).

    CIE 15 is the International Commission on Illumination (Commission Internationale de l’Eclairage) document titled “Technical Report: Colorimetry,” 2018 (CIE 15:2018).

    CIRCULATING FAN means a fan that is not a ceiling fan, but that is used to move air within a space that has no provision for connection to ducting or separation of the fan inlet from its outlet, and designed to be used for the general circulation of air.

    CLIMATE ZONES are the 16 geographic areas of California for which the commission has established typical weather data, prescriptive packages and energy budgets. Climate zones are defined by ZIP code and listed in Reference Joint Appendix JA2. FIGURE 100.1-A is an approximate map of the 16 climate zones.

    CLOSED-CIRCUIT COOLING TOWER is a cooling tower that utilizes indirect contact between a heated fluid, typically water or glycol, and the cooling atmosphere to transfer the source heat load through sensible heat, latent heat and mass transfer indirectly to the air, essentially combining a heat exchanger and cooling tower into an integrated and relatively compact device.

    CODES, CALIFORNIA HISTORICAL BUILDING CODE is the California Historical Building Code, California Code of Regulations, Title 24, Part 8 and Part 2 (Chapter 34).

    CODES, CBC is the 2025 California Building Code.

    CODES, CEC is the 2025 California Electrical Code.

    CODES, CFC is the 2025 California Fire Code.

    CODES, CMC is the 2025 California Mechanical Code.

    CODES, CPC is the 2025 California Plumbing Code.

    COEFFICIENT OF PERFORMANCE (COP), COOLING is the ratio of the rate of net heat removal to the rate of total energy input, calculated under designated operating conditions and expressed in consistent units, as determined using the applicable test method in the Appliance Efficiency Regulations or Section 110.2.

    COEFFICIENT OF PERFORMANCE (COP), HEATING is the ratio of the rate of net heat output to the rate of total energy input, calculated under designated operating conditions and expressed in consistent units, as determined using the applicable test method in the Appliance Efficiency Regulations or Section 110.2.

    COEFFICIENT OF PERFORMANCE (COP), HEAT PUMP is the ratio of the rate of useful heat output delivered by the complete heat pump unit (exclusive of supplementary heating) to the corresponding rate of energy input, in consistent units and as determined using the applicable test method in Appliance Efficiency Regulations or Section 110.2.

  • § 25921.1 High relevance — show source text
    1. A declaration that the insulating material complies with the requirements of this article.
    2. The wording of the certification seal, if such seal consists of a statement pursuant to Section 1557 (b) (2) of this article.

    (c) Every certification statement shall be dated and signed by the manufacturer attesting to its truth and accuracy. Where the manufacturer is either a corporation or a business association, the certification statement shall be dated, signed and attested to by a responsible official thereof.

    (d) Within 45 days after receipt of a certification statement, the Executive Director shall forward, to the manufacturer, an acknowledgment that the statement has been received and that it is complete and accurate on its face.

    (e) Certification of the insulation material shall be deemed to occur upon forwarding of the acknowledgement by the Executive Director. If acknowledgment is not forwarded in a timely manner, certification shall be deemed to occur on the 45th day after receipt of the certification statement.

    (f) The statement of test results required in the certification may be based upon tests conducted prior to the adoptive date of this article if: (1) the same test was conducted within two years of the date of adoption, (2) the laboratory at which the tests were

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    conducted has been approved for those tests as of the date of the certification statement, and (3) the laboratory certifies that the test and product are the same as the test and product referred to in the statement of test results.

    Authority: Section 25218(e), Public Resources Code.

    Reference: Sections 25921 and 25921.1, Public Resources Code.

    HISTORY:

    1. Amendment of subsections (a), (b) (4), (b) (6) and (f) filed 8-10-81; designated effective 9-22-81 (Register 81, No. 33).

    QUALITY ASSURANCE (RESERVED)

    Sec. 12-13-1556.

    Authority: Section 25218 (e), Public Resources Code.

    Reference: Section 25921.1, Public Resources Code.

    HISTORY:

    1. Repealer filed 8-10-81; designated effective 9-22-81 (Register 81, No. 33).

    IDENTIFICATION

    Sec. 12-13-1557.

    (a) Except as specified in subsection (b), Item 3, of this section, no insulation shall be sold in California on or after September 22, 1981, unless the insulating material, container, bundle or similar packaging material bears a visible Commission approved statement certifying that a representative sample of the insulation material has been tested and approved by an approved laboratory and complies with the requirements of this article.

    (b) The Commission-approved statement shall consist of either:

    1. A design or statement approved by the Executive Director, or

    2. An identification of the manufacturer and any statement that the material meets the quality standards of the State of California.

    3. A statement that the material meets the quality standards of the State of California included in the bill of lading shall meet the requirements of this section only if the product is being shipped in bulk, or the container or product is not otherwise labeled by the manufacturer and the product is being sold to its ultimate user.

  • § 25921.1 High relevance — show source text

    Reference: Sections 25921 and 25921.1, Public Resources Code.

    HISTORY:

    1. Amendment of subsections (a), (b) (4), (b) (6) and (f) filed 8-10-81; designated effective 9-22-81 (Register 81, No. 33).

    QUALITY ASSURANCE (RESERVED)

    Sec. 12-13-1556.

    Authority: Section 25218 (e), Public Resources Code.

    Reference: Section 25921.1, Public Resources Code.

    HISTORY:

    1. Repealer filed 8-10-81; designated effective 9-22-81 (Register 81, No. 33).

    IDENTIFICATION

    Sec. 12-13-1557.

    (a) Except as specified in subsection (b), Item 3, of this section, no insulation shall be sold in California on or after September 22, 1981, unless the insulating material, container, bundle or similar packaging material bears a visible Commission approved statement certifying that a representative sample of the insulation material has been tested and approved by an approved laboratory and complies with the requirements of this article.

    (b) The Commission-approved statement shall consist of either:

    1. A design or statement approved by the Executive Director, or

    2. An identification of the manufacturer and any statement that the material meets the quality standards of the State of California.

    3. A statement that the material meets the quality standards of the State of California included in the bill of lading shall meet the requirements of this section only if the product is being shipped in bulk, or the container or product is not otherwise labeled by the manufacturer and the product is being sold to its ultimate user.

    (c) Any representation of thermal performance which appear on any label, literature, advertising or any other writing intended for the public shall be consistent with the certification testing results and derating required by this article.

    (d) Any insulation with facings and membranes for which the flame spread exceeds 25 when tested with facings and membranes exposed to the flame during the ANSI/ASTM E84-79 test must be clearly labeled with a statement that the product may be highly combustible if used in an exposed application. This subsection shall not apply to any product meeting the requirements of Sections 2602.1-2602.6 of the 1994 Uniform Building Code.

    Authority: Section 25218(e), Public Resources Code.

    Reference: Section 25921, Public Resources Code.

    HISTORY:

    1. Amendment of subsections (a) and (c) filed 8-10-81; designated effective 9-22-81 (Register 81, No. 33).

    INSPECTIONS

    Sec. 12-13-1558.

    After September 22, 1981, the Commission may, upon the consent of the owner or lessee, or upon securing a search warrant, have access, during normal working hours, to the premises of manufacturers, distributors and retailers of insulating material sold for installation within the state for the purpose of determining compliance with the standards promulgated pursuant to Chapter 10.5 of the California Public Resources Code . Such access shall be for the purposes of obtaining representative samples of subject insulation and inspecting records and documents pertaining to tests by approved testing labs.

    Authority: Section 25218 (e), Public Resources Code.

    Reference: Section 25926, Public Resources Code.

    HISTORY:

  • § 0.62 Medium relevance — show source text

    (4) Systems erected on the premises using Group A1 refrigerant and with copper tubing not exceeding 0.62 of an inch (15.7 mm) outside diameter shall be tested by means of the refrigerant charged into the system at the saturated vapor pressure of the refrigerant at not less than 68°F (20°C). [ASHRAE 15:10.1.2]

    1116.4 Declaration. A dated declaration of test shall be

    provided for systems containing more than 55 pounds (24.9 kg) of refrigerant. The declaration shall give the name of the refrigerant and the field test pressure applied to the highside and the lowside of the system. The declaration of test shall be signed by the installer and, where an inspector is present at the tests, the inspector shall also sign the declaration. Where requested, copies of this declaration shall be furnished to the Authority Having Jurisdiction. [ASHRAE 15:10.2]

    246 2025 CALIFORNIA MECHANICAL CODE

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

    REFRIGERATION

    1116.5 Brine Systems. Brine-containing portions of a system shall be tested at one and a half times the design pressure of the system using brine as the test fluid.

    1117.0 Refrigerant-Containing Pressure Vessels.

    1117.1 Inside Dimensions 6 Inches or Less. Pressure vessels having inside dimensions of 6 inches (152 mm) or less shall be:

    (1) Listed either individually or as part of an assembly by an approved, nationally recognized testing laboratory, or

    (2) Marked directly on the vessel or on a nameplate attached to the vessel with a “U” or “UM” symbol signifying compliance with ASME BPVC Section VIII.1, or

    (3) When requested by the Authority Having Jurisdiction, the manufacturer shall provide documentation to confirm that the vessel meets the design, fabrication, and testing requirements of ASME BPVC Section VIII.1.

    Exception: Vessels having an internal or external design pressure of 15 psig (103 kPag) or less.

    Pressure vessels having inside dimensions of 6 inches (152 mm) or less shall be protected by either a pressure-relief device or a fusible plug. [ASHRAE 15:9.3.1.1]

    1117.1.1 Pressure-Relief Device. Where a pressurerelief device is used to protect a pressure vessel having an inside dimension of 6 inches (152 mm) or less, the ultimate strength of the pressure vessel so protected shall withstand a pressure of not less than 3.0 times the design pressure. [ASHRAE 15:9.3.1.2]

    1117.1.2 Fusible Plug. Where a fusible plug is used to protect a pressure vessel having an inside diameter of 6 inches (152 mm) or less, the ultimate strength of the pressure vessel so protected shall withstand a pressure 2.5 times the saturation pressure of the refrigerant used at the temperature stamped on the fusible plug or 2.5 times the critical pressure of the refrigerant used, whichever is less.

    [ASHRAE 15:9.3.1.3]

  • § 430.2. Medium relevance — show source text

    CARBON DIOXIDE ENRICHMENT is injection of additional carbon dioxide into controlled environment horticulture spaces for the purpose of stimulating plant growth.

    CASCADE REFRIGERATION SYSTEM is a type of refrigeration system that uses a low-stage refrigeration system where the heat rejected from condensing the low-stage refrigerant is absorbed using a heat-exchanger by a separate high-stage refrigeration system, and the ultimate heat rejection to ambient air is accomplished by the high-stage refrigeration system.

    2025 CALIFORNIA ENERGY CODE 9

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

    ALL OCCUPANCIES—GENERAL PROVISIONS

    CATHEDRAL CEILING is an exterior partition with a slope less than 60 degrees from horizontal that is created by applying the ceiling directly to the underside of the roof framing members and applying structural roof sheathing directly to the top of the roof framing members/rafters. It may be flat or sloped and vented or unvented.

    CEILING FAN means a nonportable device that is suspended from a ceiling or overhead structure for circulating air via the rotation of fan blades as defined in 10 CFR 430.2.

    CENTRAL FAN VENTILATION COOLING SYSTEM (CFVCS) is a ducting arrangement including outside air ducts, motorized dampers and an automatic control system that allows a residential space-conditioning system central fan and ducts to distribute outside air throughout a residential dwelling unit, intending to reduce or eliminate the need for mechanical cooling.

    CERTIFIED TO THE ENERGY COMMISSION means, when used in association with appliances, certified under Section 1606 of Title 20 of the California Code of Regulations; and otherwise means certified by the manufacturer in a declaration, executed under penalty of perjury under the laws of the State of California, that all the information provided pursuant to the certification is true, complete, accurate and in compliance with all applicable provisions of Part 6; and if applicable that the equipment, product or device was tested under the applicable test method specified in Part 6.

    CERTIFYING ORGANIZATION is an independent organization recognized by the Commission to certify manufactured devices for performance values in accordance with procedures adopted by the Commission.

    CIE 13.3 is the International Commission on Illumination (Commission Internationale de l’Eclairage) document titled “Method of Measuring and Specifying Colour Rendering Properties of Light Sources,” 1995 (CIE 13.3-1995).

    CIE 15 is the International Commission on Illumination (Commission Internationale de l’Eclairage) document titled “Technical Report: Colorimetry,” 2018 (CIE 15:2018).

    CIRCULATING FAN means a fan that is not a ceiling fan, but that is used to move air within a space that has no provision for connection to ducting or separation of the fan inlet from its outlet, and designed to be used for the general circulation of air.

    CLIMATE ZONES are the 16 geographic areas of California for which the commission has established typical weather data, prescriptive packages and energy budgets. Climate zones are defined by ZIP code and listed in Reference Joint Appendix JA2. FIGURE 100.1-A is an approximate map of the 16 climate zones.

  • § 110.3 Medium relevance — show source text

    For HPWH installations with ducts, the following requirements shall be met: a. The space joined to the installation space via ducts shall meet the minimum volume of Section 110.3(c)7B2 above, minus the volume of the HPWH installation space; and b. All duct connections and building penetrations shall be sealed; and c. Exhaust air ducts and all ducts which cross pressure boundaries shall be insulated to minimum of R-6; and

    d. Where only the HPWH inlet or outlet is ducted, installation space shall include permanent openings that consist of a single layer of fixed flat slat louvers or grilles in the bottom half of the room, and/or a door undercut. With a ducted inlet, the minimum NFA shall be equal to the cross-sectional area of the duct. With a ducted exhaust, the minimum NFA shall be the larger of 20 square inches or the minimum NFA provided by the manufacturer for this method; and e. Where the inlet and outlet ducts both terminate within the same pressure boundary, airflow from the termination points shall be diverted away from each other. Note: Ducting only the inlet or the exhaust across the pressure boundary could interfere with balanced ventilation systems. This should be considered when specifying HPWH location and ventilation method.

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

    SECTION 110.4—MANDATORY REQUIREMENTS FOR POOL AND SPA SYSTEMS AND EQUIPMENT

    (a) Certification by manufacturers. Any pool theater for a pool, spa, or a pool and spa combination shall be installed only if the manufacturer has certified that the system or equipment has all of the following:

    1. Efficiency. Equipment subject to State or federal appliance efficiency standards shall comply with the applicable provisions of Section 110.1; and

    2. On-off switch. A readily accessible on-off switch, mounted on the outside of the heater that allows shutting off the heater without adjusting the thermostat setting; and

    3. Instructions. A permanent, easily readable and weatherproof plate or card that provides the energy efficiency rating and instruction for the energy efficient operation of the pool and/or spa heater; and

    2025 CALIFORNIA ENERGY CODE 53

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

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

    (b) Installation. Any pool and/or spa system or equipment shall meet the following requirements:

    1. Heating equipment. Equipment installed to heat water for pools and/or spas shall be selected from equipment meeting the standards shown in Table 110.4-A.
  • § 1116.3 Medium relevance — show source text

    (2) Refrigeration systems containing Group R-22, not exceeding 5 tons of refrigeration capacity (18 kW), and field-piped using approved, factory-charged line sets shall be permitted to be proved tight by observing retention of pressure on a set of charging gauges and soaping connections while the system is operating.

    1116.3 Test Gases. Tests shall be performed with dry nitrogen or another nonflammable, nonreactive, dried gas. Oxygen, air, or mixtures containing them shall not be used. The means used to build up the test pressure shall have either a pressure limiting device or a pressure reducing device and a gauge on the outlet side. The pressure relief device shall be set above the test pressure but low enough to prevent permanent deformation of the system’s components.

    Exceptions:

    (1) Mixtures of dry nitrogen, inert gases, or a combination thereof such with Class 1 refrigerants in concentrations of a refrigerant weight fraction (mass fraction) not exceeding 5 percent shall be permitted for tests.

    (2) Mixtures of dry nitrogen, inert gases, or a combination thereof such with Class 2L, Class 2, and Class 3 refrigerants in concentrations not exceeding the lesser of a refrigerant weight fraction (mass fraction) of 5 percent or 25 percent of the LFL shall be permitted for tests.

    (3) Compressed air without added refrigerant shall be permitted for tests, provided the system is subsequently evacuated to less than 1000 microns (0.1333 kPa) before charging with refrigerant. The required evacuation level is atmospheric pressure for systems using R718 (water) or R-744 (carbon dioxide) as the refrigerant.

    (4) Systems erected on the premises using Group A1 refrigerant and with copper tubing not exceeding 0.62 of an inch (15.7 mm) outside diameter shall be tested by means of the refrigerant charged into the system at the saturated vapor pressure of the refrigerant at not less than 68°F (20°C). [ASHRAE 15:10.1.2]

    1116.4 Declaration. A dated declaration of test shall be

    provided for systems containing more than 55 pounds (24.9 kg) of refrigerant. The declaration shall give the name of the refrigerant and the field test pressure applied to the highside and the lowside of the system. The declaration of test shall be signed by the installer and, where an inspector is present at the tests, the inspector shall also sign the declaration. Where requested, copies of this declaration shall be furnished to the Authority Having Jurisdiction. [ASHRAE 15:10.2]

    246 2025 CALIFORNIA MECHANICAL CODE

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

    REFRIGERATION

    1116.5 Brine Systems. Brine-containing portions of a system shall be tested at one and a half times the design pressure of the system using brine as the test fluid.

    1117.0 Refrigerant-Containing Pressure Vessels.

    1117.1 Inside Dimensions 6 Inches or Less. Pressure vessels having inside dimensions of 6 inches (152 mm) or less shall be:

    (1) Listed either individually or as part of an assembly by an approved, nationally recognized testing laboratory, or

  • § 15-11 Medium relevance — show source text

    COMPLIANCE FORMS, WORKSHEETS AND REFERENCE MATERIAL

    FOR REFERENCE ONLY: The following table has been reprinted from the IES TM-15-11 Reference standard, see Section 5.106.8.

    IES TM-15-11 TABLE A-1—BACKLIGHT RATINGS (Maximum Zonal Lumens) Col2 Col3 Col4 Col5 Col6
    SECONDARY SOLID ANGLE MAXIMUM ZONAL LUMENS PER OUTDOOR LIGHTING ZONE MAXIMUM ZONAL LUMENS PER OUTDOOR LIGHTING ZONE MAXIMUM ZONAL LUMENS PER OUTDOOR LIGHTING ZONE MAXIMUM ZONAL LUMENS PER OUTDOOR LIGHTING ZONE MAXIMUM ZONAL LUMENS PER OUTDOOR LIGHTING ZONE
    SECONDARY SOLID ANGLE LZ 0 LZ 1 LZ 2 LZ 3 LZ 4
    Backlight High (BH)
    60 to 80 degrees    		 110 500 1,000 2,500 5,000
    Backlight Medium (BM)
    30 to < 60 degrees    		 220 1,000 2,500 5,000 8,500
    Backlight Low (BL)
    0 to < 30 degrees    		 110 500 1,000 2,500 5,000

    FOR REFERENCE ONLY: The following table has been reprinted from the California Energy Code, Part 6, Title 24, see Section 5.106.8.

    TABLE 130.2-A—UPLIGHT RATINGS (Maximum Zonal Lumens) Col2 Col3 Col4 Col5 Col6
    SECONDARY SOLID ANGLE MAXIMUM ZONAL LUMENS PER OUTDOOR LIGHTING ZONE MAXIMUM ZONAL LUMENS PER OUTDOOR LIGHTING ZONE MAXIMUM ZONAL LUMENS PER OUTDOOR LIGHTING ZONE MAXIMUM ZONAL LUMENS PER OUTDOOR LIGHTING ZONE MAXIMUM ZONAL LUMENS PER OUTDOOR LIGHTING ZONE
    SECONDARY SOLID ANGLE LZ 0 LZ 1 LZ 2 LZ 3 LZ 4
    Uplight High (UH)
    100 to 180 degrees    		 0 10 50 500 1,000
    Uplight Low (UL)
    90 to < 100 degrees    		 0 10 50 500 1,000

    FOR REFERENCE ONLY: The following table has been reprinted from the California Energy Code, Part 6, Title 24, see Section 5.106.8.

    TABLE 130.2-B—GLARE RATINGS (Maximum Zonal Lumens) Col2 Col3 Col4 Col5 Col6
    GLARE RATING FOR ASYMMETRICAL LUMINAIRE TYPES
    (Type I, Type II, Type III, Type IV)    		 GLARE RATING FOR ASYMMETRICAL LUMINAIRE TYPES
    **(Type I, Type II, Type III,

Frequently asked questions

What exact words must appear in the manufacturer’s declaration?

The Code does not require a single fixed sentence, but it requires that the declaration (1) be executed under penalty of perjury; and (2) state that all information provided is “true, complete, accurate and in compliance with all applicable requirements of Part 6” and (3) state that the product was tested using the Part 6 test procedure when one applies. See § 110.0(b)2(A) and § 110.0(b)2(B).

Does every product need a laboratory test result included in the declaration?

No. The Part 6 test‑procedure statement is required only if a test procedure is applicable to that product. The truth/completeness and compliance statement is always required. See § 110.0(b)2(B).

Can an installer rely on a brochure or label alone to prove certification?

No. Certification status must be confirmed by one of the authorized methods listed in § 110.0(b)3 (Energy Commission directory, application + acceptance letter, publisher confirmation of a Commission‑approved directory, or a Commission‑approved label). A brochure alone is not sufficient.

For appliances covered by Title 20, is the Part 6 declaration sufficient?

Appliances within Title 20 §1601’s scope must be certified to the Energy Commission under Title 20 procedures and may only be installed if they fully comply with Section 1608(a); follow § 110.1(a) and Title 20 certification requirements.

Who may sign the declaration for the manufacturer?

The code requires the manufacturer’s declaration be executed under penalty of perjury. The Code language implies a responsible manufacturer official should sign; where Title 20 or other referenced rules add signature or attestation rules, follow those rules as applicable. See § 110.0(b)2.

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