Title 24 · California Energy Code
Who may perform, sign, and certify field verification tests (ECC‑Rater, alternative technicians, and exceptions)?
Most field verification tests (duct leakage, refrigerant charge, ventilation airflow, compartmentalization) must be verified by a certified ECC‑Rater and submitted to the ECC‑Provider registry. For multifamily buildings with four or more habitable stories the code allows an alternative: a Certified Mechanical Acceptance Test Technician (CMATT) may perform those ECC‑Rater tests (or the installer may simply certify testing was done) and the RA2/RA3 registry submission is waived — but the CMATT must include a valid certification ID on acceptance documents and installers must still sign required certifications.
Last reviewed: July 6, 2026
What the code requires — plain English
The California Energy Code generally requires that certain field verification and diagnostic tests (for refrigerant charge, duct leakage, ventilation airflow, compartmentalization, etc.) be performed or verified by a certified ECC‑Rater, and that test results be recorded in the ECC‑Provider data registry and used for compliance. The controlling provisions for these dwelling‑unit and multifamily requirements are in § 160.2 and the multifamily acceptance/verification rules in § 160.3, with test procedures located in Reference Residential Appendix RA2 and RA3.
The most important rule: when the code text calls for an ECC‑Rater to perform field verification, multifamily buildings with four or more habitable stories may instead use a Certified Mechanical Acceptance Test Technician (CMATT) per the acceptance appendix — otherwise an ECC‑Rater (and the ECC‑Provider data registry) is required.
Requirements in detail
Who the code identifies by name (defined terms)
- ECC‑Rater — the residential Energy Code Compliance rater who performs field verification and diagnostic testing and (in many cases) submits results to the ECC‑Provider data registry (Reference Residential Appendices RA2/RA3).
- Installer — the HVAC installer who must perform certain tasks (for example weigh‑in refrigerant charging) and in some exceptions may certify that diagnostic testing was performed when the registry requirement is waived.
- Certified Mechanical Acceptance Test Technician (CMATT) — an authorized acceptance test technician who may perform acceptance/verification testing and complete Certificates of Acceptance when the code or appendices allow (CMATT identification is required on acceptance documents).
Decision table — who can do/sign what
| Decision dimension | Allowed performer(s) | ECC‑Provider registry required? | Code reference |
|---|---|---|---|
| Duct leakage testing / in‑unit forced‑air systems (typical new/altered dwelling unit) | ECC‑Rater (preferred). Installer performs sealing; ECC‑Rater verifies. | Yes for most dwelling units; data registry per RA2/RA3 required unless exception applies. | § 160.3(b)5K |
| Refrigerant charge verification (standard charge procedure) | Installer + ECC‑Rater (installer may weigh‑in; ECC‑Rater verifies using RA3 procedures). | Yes (RA2/RA3) unless exception for multifamily ≥4 stories or factory pre‑charged packaged units. | § 160.3(b)5L and RA3.2.2 / RA3.2.3.1 |
| Whole‑dwelling ventilation airflow / compartmentalization testing | ECC‑Rater, or for buildings 4+ habitable stories an alternative CMATT per NA1.9 | Yes (RA2/RA3) for most buildings; exception and installer certification apply for 4+ stories. | § 160.2(b)2Aiv and § 160.2(b)2Bi; NA1.9 (alternative) |
| Certificate of Acceptance (when required by Part 1) | CMATT must sign acceptance testing when acceptance by CMATT is required; CMATT must provide certification ID. | N/A (documentary requirement) | § 160.3(d)3 |
| Multifamily buildings, 4+ habitable stories — RA2/RA3 registry handling | Field tests that otherwise require ECC‑Rater may be performed by a CMATT; alternatively, the installer may simply certify that diagnostic testing was performed and the RA2/RA3 data‑registry submittal is not required. | No (RA2/RA3 data registry not required for multifamily units in buildings 4+ stories). | Exception to § 160.3(b)5K / § 160.3(b)5L / § 160.2(...) and RA2/RA3 notes |
Notes on the table:
- Exact RA3 procedures (for measurement access holes, standard charge verification RA3.2.2, weigh‑in RA3.2.3.1, airflow RA3.3, duct tests RA3.1) define the test steps; the code text assigns who must perform/verify those steps.
- The CMATT alternative is specifically limited to the situations identified in the multifamily provisions; refer to NA1.9 for CMATT scope and to § 160.3(d)3 for Certificate of Acceptance requirements.
How registration / signatures are handled
- ECC‑Raters and ECC‑Providers normally submit test results to the Energy Commission ECC‑Provider registry per Reference Residential Appendix RA2/RA3. The code repeatedly ties field verification procedures to RA3 test methods and to ECC‑Provider data‑registry submittal.
- When the exception for multifamily dwelling units in buildings four habitable stories and greater applies, the RA2/RA3 data‑registry requirement is waived and the installer shall certify that diagnostic testing was performed in accordance with applicable procedures (instead of registry submittal).
Exceptions & special cases
Multifamily exception (4+ habitable stories): The field verification and ECC‑Provider data registry requirements of Reference Residential Appendices RA2 and RA3 are not required for multifamily dwelling units in buildings with four habitable stories and greater; the installer shall certify that diagnostic testing was performed per the applicable procedures. (Exception language appears repeatedly in § 160.3 and related sections.)
Alternative performer for some multifamily tests: For certain field verification and diagnostic tests that would otherwise require an ECC‑Rater (for example whole‑dwelling compartmentalization testing), in multifamily buildings with four or more habitable stories those tests may be performed by a certified Mechanical Acceptance Test Technician following Reference Appendix NA1.9.
Manufacturer pre‑charged packaged systems: Entirely new or complete replacement packaged systems that the manufacturer verified and shipped with correct refrigerant charge are not required to have refrigerant charge confirmed by field testing; in that case the installer shall certify the packaged system was precharged and not altered. (See the relevant Exception to the refrigerant charge verification subsection.)
Cold weather weigh‑in procedural option: When outdoor temperature is below 55 °F and the installer uses the weigh‑in charging procedure, the installer may elect to use the alternate RA3.2.3.2 verification procedure; additional thermostat requirements apply.
Scope limits: The CMATT alternative does not automatically apply to single‑family projects or to multifamily buildings with three or fewer habitable stories — those still require ECC‑Rater verification and ECC‑Provider registry submittal unless another explicit exception applies.
Common mistakes
Assuming the installer can always both perform and sign verification: the code distinguishes installer tasks (e.g., weigh‑in charging, sealing) from independent verification by an ECC‑Rater — do not substitute installer self‑verification unless a specific exception allows it (e.g., multifamily 4+ stories or factory precharged units).
Failing to use the correct test procedures: many compliance requirements refer to specific RA3 procedures (RA3.1 for ducts, RA3.2.2/RA3.2.3 for charge, RA3.3 for airflow). Performing ad hoc tests without following those procedures can invalidate the verification.
Not recording CMATT information where required: when acceptance testing must be performed by a CMATT, the CMATT must disclose a valid CMATT certification ID on the Certificate of Acceptance and follow Section 10‑103(a)4 documentation rules. Missing that ID or documentation is noncompliant.
Confusing the RA2/RA3 registry waiver with no documentation requirement: for multifamily 4+ story exception, the registry submittal is waived, but the installer must still certify that testing was performed according to the applicable procedures — do not omit the installer certification.
Worked example — five‑story multifamily building (concrete scenario)
Scenario: A developer installs central balanced ventilation and replaces ducted air‑conditioning systems in a 5‑story (five habitable stories) multifamily building. Each unit must meet compartmentalization testing and the ventilation airflow per Equation 160.2‑B.
Step 1 — Identify who the code requires to test:
- Compartmentalization testing would ordinarily require an ECC‑Rater to perform field verification using RA3.8 procedures and confirm the dwelling‑unit leakage limit (0.3 cfm/ft2 at 50 Pa). However, because this is a building with four or more habitable stories, the test may instead be performed by a Certified Mechanical Acceptance Test Technician (CMATT) in accordance with NA1.9. (See § 160.2(b)2Bi and NA1.9.)
Step 2 — Registry & certification:
- Because the project is a multifamily building with 4+ stories, the RA2/RA3 ECC‑Provider registry submittal requirement is waived for these dwelling units; instead the installer shall certify that diagnostic testing was performed per applicable procedures. Simultaneously, the CMATT (who performed the tests) will complete any required Certificate of Acceptance and must include a valid CMATT certification ID. (See Exception to § 160.3(b)5K and § 160.3(d)3.)
Step 3 — Practical numbers:
- Using Equation 160.2‑B for a sample 1,000 ft2, 2‑bedroom unit: Qtot = 0.03×1,000 + 7.5×(2+1) = 30 + 22.5 = 52.5 cfm required ventilation airflow. The CMATT verifies ventilation airflow (RA3.7.4 procedures) and verifies the compartmentalization test (≤0.3 cfm/ft2 at 50 Pa). The installer signs the installer certification that the diagnostic testing was performed in accordance with RA3 (instead of submitting to the ECC‑Provider registry).
Bottom line for the example: The CMATT performs and documents the tests (and signs the Certificate of Acceptance including CMATT ID), and the installer also signs the required installer certification attesting that diagnostic testing was completed — no RA2/RA3 registry upload is required for the unit files.
Related provisions (quick list)
- § 160.2(b)2Aiv — Whole‑dwelling ventilation airflow / compartmentalization testing (multifamily) and RA3 test references.
- § 160.3(b)5K — Duct sealing and leakage verification requirements for multifamily dwelling units.
- § 160.3(b)5L — System airflow rate and refrigerant charge verification requirements (single/multifamily) and RA3 procedures.
- § 160.3(d)3 — Certificate of Acceptance and CMATT documentation requirements.
- Reference Residential Appendix RA3 — Field verification & diagnostic testing procedures (RA3.1 ducts, RA3.2 charge, RA3.3 airflow, RA3.7 ventilation, RA3.8 compartmentalization).
- Reference Residential Appendix RA2 — ECC‑Provider data registry notes and submission procedures (see exception language for multifamily 4+ stories).
- Reference Nonresidential / NA appendices NA1.9 / NA2.2 / NA7.x — CMATT scopes and alternate procedural references for buildings with four or more stories (see NA1.9 and NA2/NA7 cross‑references).
Code references
Grounded in the retrieved California Energy Code — click a citation to read the verbatim passage:
§ 2.2 High relevance — show source text
A. The installer and rater shall perform the standard charge verification procedure as specified in Reference Residential Appendix Section RA3.2.2, or an approved alternative procedure as specified in Section RA1; or B. The installer shall perform the weigh-in charging procedure as specified by Reference Residential Appendix Section RA3.2.3.1, provided the system is of a type that can be verified using the RA3.2.2 standard charge verification procedure and RA3.3 airflow rate verification procedure or approved alternatives in RA1. The ECC-Rater shall verify the charge using RA3.2.2 and RA3.3 or approved alternatives in RA1. Exception 1 to Section 180.2(b)2AivbII : When the outdoor temperature is less than 55°F and the installer utilizes the weigh-in charging procedure in Reference Residential Appendix Section RA3.2.3.1 to demonstrate compliance, the installer may elect to utilize the verification procedure in Reference Residential Appendix Section RA3.2.3.2. If the verification procedure in Section RA3.2.3.2 is used for compliance, the system's thermostat shall conform to the specifications in Section 110.12. Ducted systems shall comply with the minimum system airflow rate requirements in Section 180.2(b)2AivbI. Exception 2 to Section 180.2(b)2Aivb: The field verification and ECC-Provider data registry requirements of Reference Residential Appendix RA2 and RA3 are not required for multifamily dwelling units in buildings four stories and greater. The installer shall certify that diagnostic testing was performed in accordance with the applicable procedures. v. Altered space-heating system. Altered or replacement space-heating systems shall not use electric resistance as the primary heat source. Exception 1 to Section 180.2(b)2Av: Nonducted electric resistance space heating systems, if the existing space heating system is electric resistance. Exception 2 to Section 180.2(b)2Av: Ducted electric resistance space heating systems, if the existing space heating system is electric resistance and a ducted space cooling system is not being replaced or installed. Exception 3 to Section 180.2(b)2Av: Electric resistance space heating systems, if the existing space heating system is electric resistance in Climate Zone 6, 7, 8 or 15. b. Common use area space-conditioning systems. i. New or replacement space-conditioning systems or components other than new or replacement space-conditioning system ducts shall meet the requirements of Sections 170.2(c)1, 2 and 4, applicable to the systems or components being altered. For compliance with Section 170.2(c)4A, additional fan power adjustment credits are available as specified in Table 180.2-D.
TABLE 180.2-D—FAN POWER LIMITATION PRESSURE DROP ADJUSTMENT Col2 Col3 Col4 Col5 Col6 Col7 AIRFLOW MULTI-ZONE
VAV SYSTEMS1
≤ 5,000 cfmMULTI-ZONE
VAV SYSTEMS1
> 5,000 AND
≤ 10,000 cfmMULTI-ZONE
VAV SYSTEMS1
> 10,000 cfmALL OTHER
FAN SYSTEMS
**≤ 5,§ 150.1 High relevance — show source text
Exception to Section 150.1(c)7Aib: Standard ducted systems without zoning dampers may comply with the minimum airflow rate by meeting the applicable requirements in Table 150.0-B or 150.0-C as confirmed by field verification and diagnostic testing in accordance with the procedures in Reference Residential Appendix Section RA3.1.4.4 and RA3.1.4.5. The design clean-filter pressure drop requirements of Section 150.0(m)12D for the system air filter device(s) shall conform to the requirements given in Tables 150.0-B and 150.0-C.
c. The installer shall charge the system according to manufacturer’s specifications. Refrigerant charge shall be verified according to one of the following options, as applicable: I. The installer and rater shall perform the standard charge procedure as specified by Reference Residential Appendix Section RA3.2.2, or an approved alternative procedure as specified by Section RA1; or
II. The installer shall perform the weigh-in charging procedure as specified by Reference Residential Appendix Section RA3.2.3.1 provided the system is of a type that can be verified using the Section RA3.2.2 standard charge verification procedure and Section RA3.3 airflow rate verification procedure or approved alternatives in Section RA1. The ECC-Rater shall verify the charge using Sections RA3.2.2 and RA3.3 or approved alternatives in Section RA1. Exception 1 to Section 150.1(c)7Aic: When the outdoor temperature is less than 55°F and the installer utilizes the weigh-in charging procedure in Reference Residential Appendix Section RA3.2.3.1 to verify the refrigerant charge, the installer may elect to utilize the verification procedure in Reference Residential Appendix Section RA3.2.3.2. If the verification procedure in Section RA3.2.3.2 is used for compliance, the system's thermostat shall conform to the specifications in Section 110.12. Ducted systems shall comply with minimum system airflow rate requirement in Section 150.1(c)7Aib. ii. Air-cooled air conditioners and air-source heat pumps, including but not limited to ducted split systems, ducted packaged systems, small duct high-velocity systems and mini-split systems, which are of a type that cannot be verified using the specified procedures, with the requirements of Section 150.1(c)7Ai shall comply with Subsections a and b, as applicable. a. The installer shall confirm the refrigerant charge using the weigh-in charging procedure specified in Reference Residential Appendix Section RA3.2.3.1, as verified by an ECC-Rater according to the procedures specified in Reference Residential Appendix Section RA3.2.3.2.; and b. Systems that utilize forced air ducts shall comply with the minimum system airflow rate requirement in Section 150.1(c)7Aib provided the system is of a type that can be verified using the procedures in Section RA3.3 or an approved alternative procedure in Section RA1.
§ 180.2 High relevance — show source text
A. Small duct high velocity systems shall demonstrate a minimum system airflow rate greater than or equal to 250 cfm per ton of nominal cooling capacity; or
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B. All other air-cooled air conditioner or air-source heat pump systems shall demonstrate a minimum system airflow rate greater than or equal to 300 cfm per ton of nominal cooling capacity. Exception 1 to Section 180.2(b)2AivbI : Systems unable to comply with the minimum airflow rate requirement shall demonstrate compliance using the procedures in Section RA3.3.3.1.5, and the system's thermostat shall conform to the specifications in Section 110.12. Exception 2 to Section 180.2(b)2AivbI: Entirely new or complete replacement space-conditioning systems, as specified by Section 180.2(b)2Ai, without zoning dampers may comply with the minimum airflow rate by meeting the applicable requirements in Table 160.3-A or 160.3-B as confirmed by field verification and diagnostic testing in accordance with the procedures in Reference Residential Appendix Sections RA3.1.4.4 and RA3.1.4.5. The design clean-filter pressure drop requirements of Section 160.2(a)1C for the system air filter device(s) shall conform to the requirements given in Tables 160.3-A and 160.3-B.
II. The installer shall charge the system according to manufacturer’s specifications. Refrigerant charge shall be verified according to one of the following options, as applicable. A. The installer and rater shall perform the standard charge verification procedure as specified in Reference Residential Appendix Section RA3.2.2, or an approved alternative procedure as specified in Section RA1; or B. The installer shall perform the weigh-in charging procedure as specified by Reference Residential Appendix Section RA3.2.3.1, provided the system is of a type that can be verified using the RA3.2.2 standard charge verification procedure and RA3.3 airflow rate verification procedure or approved alternatives in RA1. The ECC-Rater shall verify the charge using RA3.2.2 and RA3.3 or approved alternatives in RA1. Exception 1 to Section 180.2(b)2AivbII : When the outdoor temperature is less than 55°F and the installer utilizes the weigh-in charging procedure in Reference Residential Appendix Section RA3.2.3.1 to demonstrate compliance, the installer may elect to utilize the verification procedure in Reference Residential Appendix Section RA3.2.3.2. If the verification procedure in Section RA3.2.3.2 is used for compliance, the system's thermostat shall conform to the specifications in Section 110.12. Ducted systems shall comply with the minimum system airflow rate requirements in Section 180.2(b)2AivbI. Exception 2 to Section 180.2(b)2Aivb: The field verification and ECC-Provider data registry requirements of Reference Residential Appendix RA2 and RA3 are not required for multifamily dwelling units in buildings four stories and greater. The installer shall certify that diagnostic testing was performed in accordance with the applicable procedures. v. Altered space-heating system. Altered or replacement space-heating systems shall not use electric resistance as the primary heat source.
§ 2.2 High relevance — show source text
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the RA3.2.2 standard charge verification procedure and RA3.3 airflow rate verification procedure or approved alternatives in RA1. The ECC-Rater shall verify the charge using RA3.2.2 and RA3.3 or approved alternatives in RA1. Exception to Section 170.2(c)3BiaI: Systems that cannot conform to the specifications for hole location in Reference Residential Appendix Figure RA3.2-1 shall not be required to provide holes as described in Figure RA3.2-1. Exception to Section 170.2(c)3BiaII: Standard ducted systems without zoning dampers may comply with the minimum airflow rate by meeting the applicable requirements in Table 160.3-A and Table 160.3-B as confirmed by field verification and diagnostic testing in accordance with the procedures in Reference Residential Appendix Sections RA3.1.4.4 and RA3.1.4.5. The design clean-filter pressure drop requirements of Section 160.2(b)1D for the system air filter device(s) shall conform to the requirements given in Table 160.3-A and Table 160.3-B. Exception to Section 170.2(c)3BiaIII : When the outdoor temperature is less than 55°F and the installer utilizes the weigh-in charging procedure in Reference Residential Appendix Section RA3.2.3.1 to verify the refrigerant charge, the installer may elect to utilize the verification procedure in Reference Residential Appendix Section RA3.2.3.2. If the verification procedure in Section RA3.2.3.2 is used for compliance, the system’s thermostat shall conform to the specifications in Section 110.12. Ducted systems shall comply with the minimum system airflow rate requirement in Section 170.2(c)3BiaII.
b. For air-cooled air conditioners and air-source heat pumps, including but not limited to ducted split systems, ducted packaged systems, small duct high velocity systems and mini-split systems, which are of a type that cannot comply with the requirements of Section 170.2(c)3Bi: I. The installer shall confirm the refrigerant charge using the weigh-in charging procedure specified in Reference Residential Appendix Section RA3.2.3.1, as verified by a ECC-Rater according to the procedures specified in Reference Residential Appendix Section RA3.2.3.2; and II. Systems that utilize forced air ducts shall comply with the minimum system airflow rate requirement in Section 170.2(c)3BiaII, provided the system is of a type that can be verified using the procedures in RA3.3 or an approved alternative procedure in RA1. Exception 1 to Section 170.2(c)3Bi: Packaged systems for which the manufacturer has verified correct system refrigerant charge prior to shipment from the factory are not required to have refrigerant charge confirmed through field verification and diagnostic testing. The installer of these packaged systems shall certify that the packaged system was precharged at the factory and has not been altered in a way that would affect the charge. Ducted systems shall comply with minimum system airflow rate requirement in Section 170.2(c)3Bib, provided that the system is of a type that can be verified using the procedure specified in RA3.3 or an approved alternative in RA1.
§ 150.1 High relevance — show source text
A. Refrigerant charge. When refrigerant charge verification is shown as required by Table 150.1-A, the system shall comply with either Section 150.1(c)7Ai or 150.1(c)7Aii: i. Air-cooled air conditioners and air-source heat pumps, including but not limited to ducted split systems, ducted packaged systems, small duct high velocity systems, and mini-split systems, shall comply with Subsections a, b and c, unless the system is of a type that cannot be verified using the specified procedures: a. Have measurement access holes (MAH), installed according to the specifications in Reference Residential Appendix Section RA3.2.2.3; and
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Exception to Section 150.1(c)7Aia: Systems that cannot conform to the specifications for hole location in Reference Residential Appendix Figure RA3.2-1, shall not be required to provide holes as described in Figure RA3.2-1. b. System airflow rate in accordance with Subsection I or II shall be confirmed through field verification and diagnostic testing in accordance with all applicable procedures specified in Reference Residential Appendix Section RA3. 3 or an approved alternative procedure as specified by Section RA1; and I. For small duct high velocity systems the system airflow rate shall be greater than or equal to 250 cfm per ton; or II. For all other air-cooled air conditioner or air-source heat pump systems the system airflow rate shall be greater than or equal to 350 cfm per ton. Exception to Section 150.1(c)7Aib: Standard ducted systems without zoning dampers may comply with the minimum airflow rate by meeting the applicable requirements in Table 150.0-B or 150.0-C as confirmed by field verification and diagnostic testing in accordance with the procedures in Reference Residential Appendix Section RA3.1.4.4 and RA3.1.4.5. The design clean-filter pressure drop requirements of Section 150.0(m)12D for the system air filter device(s) shall conform to the requirements given in Tables 150.0-B and 150.0-C.
c. The installer shall charge the system according to manufacturer’s specifications. Refrigerant charge shall be verified according to one of the following options, as applicable: I. The installer and rater shall perform the standard charge procedure as specified by Reference Residential Appendix Section RA3.2.2, or an approved alternative procedure as specified by Section RA1; or
II. The installer shall perform the weigh-in charging procedure as specified by Reference Residential Appendix Section RA3.2.3.1 provided the system is of a type that can be verified using the Section RA3.2.2 standard charge verification procedure and Section RA3.3 airflow rate verification procedure or approved alternatives in Section RA1. The ECC-Rater shall verify the charge using Sections RA3.2.2 and RA3.3 or approved alternatives in Section RA1. Exception 1 to Section 150.1(c)7Aic: When the outdoor temperature is less than 55°F and the installer utilizes the weigh-in charging procedure in Reference Residential Appendix Section RA3.2.3.1 to verify the refrigerant charge, the installer may elect to utilize the verification procedure in Reference Residential Appendix Section RA3.2.3.2.
§ 110.0 High relevance — show source text
B. Space-conditioning and ventilation systems. All space heating and space cooling equipment serving dwelling units shall comply with minimum Appliance Efficiency Regulations as specified in Sections 110.0 through 110.2 and meet all applicable requirements of Sections 160.3(b) and 170.2(c)2. i. Refrigerant charge—systems serving individual dwelling units. When refrigerant charge verification or fault indicator display is shown as required by Table 170.2-K, the system shall comply with either Section 170.2(c), 170.2(c)3Bia or 170.2(c)3Bib:
a. Air-cooled air conditioners and air-source heat pumps, including but not limited to ducted split systems, ducted packaged systems, small duct high velocity systems and mini-split systems, shall comply with Subsections I, II and III, unless the system is of a type that cannot be verified using the specified procedures: I. Have measurement access holes (MAH) installed according to the specifications in Reference Residential Appendix Section RA3.2.2.3; and II. System airflow rate in accordance with Subsection A or B below shall be confirmed through field verification and diagnostic testing in accordance with all applicable procedures specified in Reference Residential Appendix Section RA3.3 or an approved alternative procedure as specified by RA1; and A. For small duct high velocity systems, the system airflow rate shall be greater than or equal to 250 cfm per ton; or B. For all other air-cooled air conditioner or air-source heat pump systems, the system airflow rate shall be greater than or equal to 350 cfm per ton. III. The installer shall charge the system according to manufacturer’s specifications. Refrigerant charge shall be verified according to one of the following options, as applicable: A. The installer and rater shall perform the standard charge procedure as specified by Reference Residential Appendix Section RA3.2.2 or an approved alternative procedure as specified by RA1; or B. The installer shall perform the weigh-in charging procedure as specified by Reference Residential Appendix Section RA3.2.3.1, provided the system is of a type that can be verified using
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the RA3.2.2 standard charge verification procedure and RA3.3 airflow rate verification procedure or approved alternatives in RA1. The ECC-Rater shall verify the charge using RA3.2.2 and RA3.3 or approved alternatives in RA1. Exception to Section 170.2(c)3BiaI: Systems that cannot conform to the specifications for hole location in Reference Residential Appendix Figure RA3.2-1 shall not be required to provide holes as described in Figure RA3.2-1. Exception to Section 170.2(c)3BiaII: Standard ducted systems without zoning dampers may comply with the minimum airflow rate by meeting the applicable requirements in Table 160.3-A and Table 160.3-B as confirmed by field verification and diagnostic testing in accordance with the procedures in Reference Residential Appendix Sections RA3.1.4.4 and RA3.1.4.5. The design clean-filter pressure drop requirements of Section 160.2(b)1D for the system air filter device(s) shall conform to the requirements given in Table 160.3-A and Table 160.3-B.
California Energy Code High relevance — show source text
; 2′ C.R.S. with 1″ cover on
both top and bottom flanges; 13′1″ span
restrained.|60 psf|2 hrs|||7|1, 3|2| |F/C-6-RC-34|61/4″|61/4″ thick; 43/4″ (5120 psi) concrete core;
1″ T&G board flooring;1/2″ plaster under-
coat; 4″ × 3″ × 10 lbs R.S.J.; 3′ C.R.S. flush
with top surface concrete; 12′ span simply
supported; 2″ × 1′3″ clinker concrete
insert.|100 psf|4 hrs|||7|1, 7|4| |F/C-6-RC-35|61/4″|43/4″ (3600 psi) concrete core; 1″ T&G
board flooring;1/2″ plaster undercoat; 4″ ×
3″ × 10 lbs R.S.J.; 3′ C.R.S. flush with top
surface concrete; 12′ span simply
supported; 2″ × 1′3″ clinker concrete
insert.|100 psf|2 hrs
30 min|||7|1, 5|21/2| |F/C-6-RC-36|61/4″|43/4″ (2800 psi) concrete core; 1″ T&G
board flooring;1/2″ plaster undercoat; 4″ ×
3″ × 10 lbs R.S.J.; 3′ C.R.S. flush with top
surface concrete; 12″ span simply
supported; 2″ × 1′3″ clinker concrete
insert.|80 psf|4 hrs|||7|1, 7|4| |F/C-7-RC-37|7″|(3640 psi) concrete deck;1/4″ reinforce-
ment bars at 6″ pitch with 11/2″ cover;1/4″
reinforcement bars at 5″ pitch perpendic-
ular with 11/2″ cover; 13′1″ span
restrained.|169 psf|6 hrs|||7|1, 14|6| |F/C-7-RC-38|7″|(4060 psi) concrete deck; 4″ × 3″ × 10 lbs
R.S.J.; 2′6″ C.R.S. with 11/2″ cover on both
top and bottom flanges; 4″ × 6″ × 13 SWG
mesh reinforcement 11/2″ from bottom of
slab; 13′1″ span restrained.|175 psf|6 hrs|||7|1, 14|6| |F/C-7-RC-39|71/4″|53/4″ (4010 psi) concrete core; 1″ T&G
board flooring;1/2″ plaster undercoat;
4″ × 3″ × 10 lbs R.S.J.; 2′6″ C.R.S.§ 5003.2.4.1 High relevance — show source text
5003.2.4.1 Underground tanks. Underground tanks used for the storage of liquid hazardous materials shall be provided with secondary containment. In lieu of providing secondary containment for an underground tank, an above-ground tank in an underground vault complying with Section 5704.2.8 shall be permitted.
5003.2.4.2 Above-ground tanks. Above-ground stationary tanks used for the storage of hazardous materials shall be located and protected in accordance with the requirements for outdoor storage of the particular material involved.
Exception: Above-ground tanks that are installed in vaults complying with Section 5303.16 or 5704.2.8 shall not be required to comply with location and protection requirements for outdoor storage.
5003.2.4.2.1 Marking. Above-ground stationary tanks shall be marked as required by Section 5003.5.
5003.2.5 Empty containers and tanks. Empty containers and tanks previously used for the storage of hazardous materials shall be free from residual material and vapor as defined by DOTn, the Resource Conservation and Recovery Act (RCRA) or other regulating authority or maintained as specified for the storage of hazardous material.
5003.2.6 Maintenance. In addition to the requirements of Section 5003.2.3, equipment, machinery and required detection and alarm systems associated with hazardous materials shall be maintained in an operable condition. Defective containers, cylinders and tanks shall be removed from service, repaired or disposed of in an approved manner. Defective equipment or machinery shall be removed from service and repaired or replaced. Required detection and alarm systems shall be replaced or repaired where defective.
5003.2.6.1 Tanks out of service for 90 days. Stationary tanks not used for a period of 90 days shall be properly safeguarded or removed in an approved manner. Such tanks shall have the fill line, gauge opening and pump connection secured against tampering. Vent lines shall be properly maintained.
5003.2.6.1.1 Return to service. Tanks that are to be placed back in service shall be tested in an approved manner.
5003.2.6.2 Defective containers and tanks. Defective containers and tanks shall be removed from service, repaired in accordance with approved standards or disposed of in an approved manner.
5003.2.7 Liquid-level limit control. Atmospheric tanks having a capacity greater than 500 gallons (1893 L) and that contain hazardous material liquids shall be equipped with a liquid-level limit control or other approved means to prevent overfilling of the tank.
5003.2.8 Seismic protection. Machinery and equipment utilizing hazardous materials shall be braced and anchored in accordance with the seismic design requirements of the California Building Code for the seismic design category in which the machinery or equipment is classified.
5003.2.9 Testing. The equipment, devices and systems listed in Section 5003.2.9.1 shall be tested at the time of installation and at one of the intervals listed in Section 5003.2.9.2. Records of the tests conducted or maintenance performed shall be maintained in accordance with the provisions of Section 110.3.
Exceptions:
- Periodic testing shall not be required where approved written documentation is provided stating that testing will damage the equipment, device or system and the equipment, device or system is maintained as specified by the manufacturer.
§ 17.2.5.4. High relevance — show source text
3. Special reinforced concrete moment frames—Not permitted by OSHPD.
Exceptions: 1. Systems listed in this section can be used as an alternative system when preapproved by the enforcement agency. 2. Rooftop or other supported structures not exceeding two stories in height and 10 percent of the total structure weight can use the systems in this section when designed as components per ASCE 7, Chapter 13. 3. Systems listed in this section can be used for seismically isolated buildings, when permitted by ASCE 7, Section 17.2.5.4.
1617A.1.5 Reserved.
1617A.1.6 Reserved.
1617A.1.7 ASCE 7, Section 12.2.5.6.1 [DSA-SS] The exception after the first paragraph is not permitted by DSA-SS.
1617A.1.8 ASCE 7, Section 12.2.5.7.1 [DSA-SS] The exception after the first paragraph is not permitted by DSA-SS.
1617A.1.9 ASCE 7, Section 12.2.5.7.2 [DSA-SS] The exception after the first paragraph is not permitted by DSA-SS.
1617A.1.10 ASCE 7, Section 12.3.3.1. Replace ASCE 7, Section 12.3.3.1 by the following:
12.3.3.1 Prohibited vertical irregularities for Seismic Design Categories D through F. Structures assigned to Seismic Design Category D, E or F that have vertical irregularities Type 1b, 4a or 4b of Table 12.3-2 shall not be permitted.
Exception: Structures assigned to Seismic Design Category D, E or F that have vertical irregularity Type 4a shall be permitted where the story lateral strength is not less than 80% of that in the story above.
1617A.1.11 ASCE 7, Section 12.7.2. Modify ASCE 7, Section 12.7.2, by adding Item 7 to read as follows: 7. Where buildings provide lateral support for walls retaining earth, and the exterior grades on opposite sides of the building differ by more than 6 feet (1829 mm), the load combination of the seismic increment of earth pressure due to earthquake acting on the higher side, as determined by a geotechnical engineer qualified in soils engineering plus the difference in earth pressures shall be added to the lateral forces provided in this section.
1617A.1.12 ASCE 7, Section 12.10.2.1. Replace Exception to ASCE 7, Section 12.10.2.1 by the following:
Exception: In light-frame structures or portions thereof braced entirely by wood light-frame shear walls, collector elements and their connections, including connections to vertical elements, need only be designed to resist forces using the load combinations of Section 2.3.6 with seismic forces determined in accordance with Section 12.10.1.1.
1617A.1.13 ASCE 7, Section 12.13.5.2. Modify ASCE 7, Section 12.13.5.2 by the following:
§ 11B-8 High relevance — show source text
1. A primary entrance to the building or facility, 2. Toilet and bathing facilities serving the area, 3. Drinking fountains serving the area,
4. Public telephones serving the area, and
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ACCESSIBILITY TO PUBLIC BUILDINGS, PUBLIC ACCOMMODATIONS, COMMERCIAL BUILDINGS AND PUBLIC HOUSING
5. Signs.
Note: The language in this exception, which refers to the “immediately preceding edition of the California Building Code,” shall permit a reference back to one CBC edition only and is not accumulative to prior editions. 3. Additions or alterations to meet accessibility requirements consisting of one or more of the following items shall be limited to the actual scope of work of the project and shall not be required to comply with Section 11B-202.4: 1. Altering one building entrance. 2. Altering one existing toilet facility. 3. Altering existing elevators. 4. Altering existing steps. 5. Altering existing handrails. 4. Alterations solely for the purpose of barrier removal undertaken pursuant to the requirements of the Americans with Disabil- ities Act (Public Law 101-336, 28 C.F.R. Section 36.304) or the accessibility requirements of this code as those requirements or regulations now exist or are hereafter amended including, but not limited to, one or more of the following items shall be limited to the actual scope of work of the project and shall not be required to comply with Section 11B-202.4: 1. Installing ramps. 2. Making curb cuts in sidewalks and entrance. 3. Repositioning shelves. 4. Rearranging tables, chairs, vending machines, display racks and other furniture. 5. Repositioning telephones. 6. Adding raised markings on elevator control buttons. 7. Installing flashing alarm lights. 8. Widening doors. 9. Installing offset hinges to widen doorways. 10. Eliminating a turnstile or providing an alternative accessible route. 11. Installing accessible door hardware. 12. Installing grab bars in toilet stalls. 13. Rearranging toilet partitions to increase maneuvering space. 14. Insulating lavatory pipes under sinks to prevent burns. 15. Installing a raised toilet seat. 16. Installing a full-length bathroom mirror. 17. Repositioning the paper towel dispenser in a bathroom. 18. Creating designated accessible parking spaces. 19. Removing high-pile, low-density carpeting. 5. Alterations of existing parking lots by resurfacing and/or restriping shall be limited to the actual scope of work of the project and shall not be required to comply with Section 11B-202.4. 6. The addition or replacement of signs and/or identification devices shall be limited to the actual scope of work of the project and shall not be required to comply with Section 11B-202.4. 7. _Projects consisting only of heating, ventilation, air conditioning, reroofing,
§ 1.11 High relevance — show source text
[A] LISTED. Equipment, materials, products or services included in a list published by an organization acceptable to the building official and concerned with evaluation of products or services that maintains periodic inspection of production of listed equipment or materials or periodic evaluation of services and whose listing states either that the equipment, material, product or service meets identified standards or has been tested and found suitable for a specified purpose. Terms that are used to identify listed equipment, products or materials include “listed,” “certified,” “classified” or other terms as determined appropriate by the listing organization.
[HCD 1 & HCD 2] “ Listed” means all products that appear in a list published by an approved testing or listing agency. For additional information, see Health and Safety Code Section 17920(h).
[SFM] For applications listed in Section 1.11 regulated by the Office of the State Fire Marshal, “listed” shall also mean equipment or materials accepted by the state fire marshal as conforming to the provisions of the State Fire Marshal’s regulations and which are included in a list published by the State Fire Marshal.
LISTING AGENCY. [HCD 1 & HCD 2] An agency approved by the department that is in the business of listing and labeling products, mate- rials, equipment and installations tested by an approved testing agency, and that maintains a periodic inspection program on current production of listed products, equipment and installations, and that, at least annually, makes available a published report of these list- ings. For additional information, see Health and Safety Code Section 17920(i).
[BS] LIVE LOAD. A load produced by the use and occupancy of the building or other structure that does not include construction or environmental loads such as wind load, snow load, rain load, earthquake load, flood load or dead load.
[BS] LIVE LOAD, ROOF. A load on a roof produced:
- During maintenance by workers, equipment and materials; or
- During the life of the structure by movable objects such as planters or other similar small decorative appurtenances that are not occupancy related.
[BG] LIVE/WORK UNIT. A dwelling unit or sleeping unit in which a significant portion of the space includes a nonresidential use that is operated by the tenant or building owner .
[BS] LOAD AND RESISTANCE FACTOR DESIGN (LRFD). A method of proportioning structural members and their connections using load and resistance factors such that no applicable limit state is reached when the structure is subjected to appropriate load combinations. The term “LRFD” is used in the design of steel and wood structures.
[BS] LOAD EFFECTS. Forces and deformations produced in structural members by the applied loads.
[BS] LOAD FACTOR. A factor that accounts for deviations of the actual load from the nominal load, for uncertainties in the analysis that transforms the load into a load effect, and for the probability that more than one extreme load will occur simultaneously.
[BS] LOADS. Forces or other actions that result from the weight of building materials, occupants and their possessions, environmental effects, differential movement and restrained dimensional changes. Permanent loads are those loads in which variations over time are rare or of small magnitude, such as dead loads. All other loads are variable loads (see “Nominal loads”).
LOBBY. [SFM, HCD 1 & HCD 2] An area not defined as a waiting room at the entrance of a building through which persons must pass.
§ 406.5.4 High relevance — show source text
TABLE 406.5.4—OPEN PARKING GARAGES AREA AND HEIGHT Col2 Col3 Col4 Col5 TYPE OF
CONSTRUCTIONAREA PER TIER
(square feet)HEIGHT (in tiers) HEIGHT (in tiers) HEIGHT (in tiers) TYPE OF
CONSTRUCTIONAREA PER TIER
(square feet)Ramp access Mechanical access Mechanical access TYPE OF
CONSTRUCTIONAREA PER TIER
(square feet)Ramp access Automatic sprinkler system Automatic sprinkler system TYPE OF
CONSTRUCTIONAREA PER TIER
(square feet)Ramp access No Yes IA Unlimited Unlimited Unlimited Unlimited IB Unlimited 12 tiers 12 tiers 18 tiers IIA 50,000 10 tiers 10 tiers 15 tiers IIB 50,000 8 tiers 8 tiers 12 tiers IV 50,000 4 tiers 4 tiers 4 tiers For SI: 1 square foot = 0.0929 m2. For SI: 1 square foot = 0.0929 m2. For SI: 1 square foot = 0.0929 m2. For SI: 1 square foot = 0.0929 m2. For SI: 1 square foot = 0.0929 m2. 406.5.4.1 Single use. Where the open parking garage is used exclusively for the parking or storage of private motor vehicles, and the building is without other uses, the area and height shall be permitted to comply with Table 406.5.4, along with increases allowed by Section 406.5.5.
Exception: The grade-level tier is permitted to contain an office, waiting and toilet rooms having a total combined area of not more than 1,000 square feet (93 m [2] ). Such area need not be separated from the open parking garage.
In open parking garages having a spiral or sloping floor, the horizontal projection of the structure at any cross section shall not exceed the allowable area per parking tier. In the case of an open parking garage having a continuous spiral floor, each 9 feet 6 inches (2896 mm) of height, or portion thereof, shall be considered under these provisions to be a tier.
406.5.5 Area and height increases. The allowable area and height of open parking garages shall be increased in accordance with the provisions of this section. Garages with sides open on three-fourths of the building’s perimeter are permitted to be increased by 25 percent in area and one tier in height. Garages with sides open around the entire building’s perimeter are permitted to be increased by 50 percent in area and one tier in height. For a side to be considered open under these provisions, the total area of openings along the side shall be not less than 50 percent of the interior area of the side at each tier and such openings shall be equally distributed along the length of the tier. For purposes of calculating the interior area of the side, the height shall not exceed 7 feet (2134 mm).
§ 160.2 High relevance — show source text
Exception to Section 160.2(b)2Axia: Systems that require servicing from inside the attic shall have the following:
- A fault indicator display (FID) meeting the requirements of Reference Appendix JA 17; and
- An attic access door located in a wall or, where attic access is provided through a ceiling, an attic access hatch that includes an integrated ladder; and
- A walkway from the attic access door to the HRV/ERV. b. IAQ system component accessibility. Fans, motors, heat exchangers, filters and recovery cores shall meet all applicable requirements of California Mechanical Code Section 304.0 accessibility of service. B . Dwelling unit field verification and diagnostic testing. i. Whole-dwelling unit ventilation airflow performance . The whole-dwelling unit ventilation airflow required by Section 160.2(b)2Aiv or 160.2(b)2Av shall be confirmed through field verification and diagnostic testing in accordance with Reference Appendix RA3.7.4.1.1 or NA2.2.4.1.1 as applicable for supply and exhaust systems or RA3.7.4.1.2 or NA2.2.4.1.2 as applicable for balanced systems. Balanced mechanical ventilation system airflow shall be the average of the supply fan and exhaust fan flows. Ventilation airflow of systems with multiple operating modes shall be tested in all modes designed to comply with the required ventilation airflows. ii. Kitchen local mechanical exhaust—vented range hoods. Vented range hoods installed to comply with local mechanical exhaust requirements specified in Section 160.2(b)2Avi shall be field verified in accordance with
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Reference Appendix RA3.7.4.3 or NA2.2.4.1.4 as applicable to confirm the model is rated by HVI or AHAM to comply with the following requirements: a. The minimum ventilation airflow rate as specified by Section 160.2(b)2Avi, or alternatively the minimum capture efficiency as specified by Section 160.2(b)2Avi; and b. The maximum sound rating as specified in Section 160.2(b)2Avif. iii. Heat recovery ventilation (HRV) and energy recovery ventilation (ERV) system fan efficacy. At a minimum, systems with heat or energy recovery serving a single dwelling unit shall have a fan efficacy of ≤1.0 W/cfm as confirmed by field verification in accordance with Reference Appendix RA3.7.4.4 or NA2.2.4.1.5 as applicable. If Section 170.2(c)3Biva requirements are applicable to the dwelling unit, then field verification shall instead confirm compliance with the maximum fan efficacy and minimum sensible recovery efficiency specified in Section 170.2(c)3Biva in accordance with the procedures specified in Reference Appendix RA3.7.4.4 or NA2.2.4.1.5 as applicable. iv. In multifamily buildings with four or more habitable stories, the field verification and diagnostic testing required in Sections 160.2(b)2Bi, ii and iii which requires an ECC-Rater may alternatively be performed by a certified Mechanical Acceptance Test Technician according to the requirements specified in Reference Appendix NA1.9. C. Multifamily building central ventilation system field verification. i. **Central ventilation system duct sealing.
§ 180.2 High relevance — show source text
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MULTIFAMILY BUILDINGS—ADDITIONS, ALTERATIONS AND REPAIRS TO EXISTING MULTIFAMILY BUILDINGS
C. If it is not possible to meet the duct sealing requirements of either Section 180.2(b)2AiicI or II then all accessible leaks shall be sealed and verified through a visual inspection and a smoke test by a certified ECC-Rater utilizing the methods specified in Reference Residential Appendix RA3.1.4.3.5.
Exception to Section 180.2(b)2AiiaII: duct sealing. Existing duct systems that are extended, which are constructed, insulated or sealed with asbestos. Exception 1 to 180.2(b)2Aii: The field verification and ECC-Provider data registry requirements of Reference Residential Appendix RA2 and RA3 are not required for multifamily dwelling units in buildings four stories and greater. The installer shall certify that diagnostic testing was performed in accordance with the applicable procedures. iii. Altered space-conditioning system—duct sealing. In all climate zones, when a space-conditioning system serving a multifamily dwelling is altered by the installation or replacement of space-conditioning system equipment, including replacement of the air handler, outdoor condensing unit of a split system air conditioner or heat pump, or cooling or heating coil, the duct system that is connected to the altered space-conditioning system equipment shall be sealed, as confirmed through field verification and diagnostic testing in accordance with the applicable procedures for duct sealing of altered existing duct systems as specified in Reference Residential Appendix RA3.1 and the leakage compliance criteria specified in Subsection a, b or c below. a. The measured duct leakage shall be equal to or less than 15 percent of air handler airflow as determined utilizing the procedures in Reference Residential Appendix Section RA3.1.4.3.1; or b. The measured duct leakage to outside shall be equal to or less than 10 percent of air handler airflow as determined utilizing the procedures in Reference Residential Appendix Section RA3.1.4.3.4; or c. If it is not possible to meet the duct sealing requirements of either Section 180.2(b)2Aiiia or b, then all accessible leaks shall be sealed and verified through a visual inspection and a smoke test by a certified ECC-Rater utilizing the methods specified in Reference Residential Appendix RA3.1.4.3.5. Exception 1 to Section 180.2(b)2Aiii : duct sealing. Duct systems that are documented to have been previously sealed as confirmed through field verification and diagnostic testing in accordance with procedures in Reference Residential Appendix RA3.1. Exception 2 to Section 180.2(b)2Aiii: duct sealing. Duct systems with less than 40 linear feet as determined by visual inspection. Exception 3 to Section 180.2(b)2Aiii: duct sealing. Existing duct systems constructed, insulated or sealed with asbestos.
Exception 4 to Section 180.2(b)2Aiii: The field verification and ECC-Provider data registry requirements of Reference Residential Appendix RA2 and RA3 are not required for multifamily dwelling units in buildings four stories and greater. The installer shall certify that diagnostic testing was performed in accordance with the applicable procedures. iv. **Altered space-conditioning system mechanical cooling.
§ 160.2 High relevance — show source text
If the outdoor airflow for the CFI ventilation system is fan-powered, then the outdoor air fan shall not operate when the required motorized damper(s) on the outdoor air ventilation duct(s) is closed.
d. Variable ventilation. CFI ventilation systems shall incorporate controls that track outdoor air ventilation run time, and either open or close the required motorized damper(s) depending on whether or not outdoor air ventilation is required for compliance with Section 160.2(b)2Aiv. During periods when comfort conditioning is not called for by the space-conditioning thermostat, the CFI ventilation system controls shall operate the space-conditioning system central fan and outdoor air damper(s) when necessary to ensure compliance with the minimum outdoor air ventilation required by Section 160.2(b)2Aiv in accordance with applicable variable mechanical ventilation methods specified in ASHRAE 62.2 Section 4.5.
iii. Air filtration. Air filtration shall conform to the specifications in Section 160.2(b)1. Compliance with ASHRAE 62.2 Sections 6.7 (Minimum Filtration) and 6.7.1 (Filter Pressure Drop) shall not be required. iv. Whole-dwelling unit mechanical ventilation . Multifamily attached dwelling units shall comply with Subsections a and b below.
a. Mechanical ventilation airflow shall be provided at rates greater than or equal to the value determined in accordance with Equation 160.2-B. Total Required Ventilation Rate [ASHRAE 62.2:4.1.1]: (Equation 160.2-B) Q tot = 0.03 A floor + 7.5( N br + 1)
where:
Q tot = total required ventilation rate, cfm. A floor = dwelling-unit floor area, ft [2] . N br = number of bedrooms (not to be less than 1). b. All dwelling units in a multifamily building shall use the same whole-dwelling unit ventilation system type. The dwelling unit shall comply with Subsections 1 and 2 below.
- Balanced or supply ventilation . A balanced or supply ventilation system shall provide the required whole-dwelling-unit ventilation airflow. Balanced systems with heat recovery or energy recovery that serve a single dwelling unit shall have a fan efficacy of ≤1.0 W/cfm; and
- Compartmentalization testing. The air leakage rate shall not exceed 0.3 cubic feet per minute at 50 Pa (0.2 inch water) per ft [2] of dwelling unit envelope surface area as confirmed by ECC-Rater field verification and diagnostic testing in accordance with the procedures specified in Reference Appendix RA3.8 or NA2.3 as applicable. In multifamily buildings with four or more habitable stories,
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the field verification and diagnostic testing which requires an ECC-Rater may alternatively be performed by a certified Mechanical Acceptance Test Technician according to the requirements specified in Reference Appendix NA1.9. v. Multifamily building central ventilation system airflow rate tolerance. Multifamily building central ventilation systems that serve multiple dwelling units shall have airflow rates in each dwelling unit served that meet or exceed a design ventilation airflow rate specification.
§ 7.4.3 High relevance — show source text
MULTIFAMILY BUILDINGS—MANDATORY REQUIREMENTS
Reference Appendix RA3.7.4.3 or NA2.2.4.1.4 as applicable to confirm the model is rated by HVI or AHAM to comply with the following requirements: a. The minimum ventilation airflow rate as specified by Section 160.2(b)2Avi, or alternatively the minimum capture efficiency as specified by Section 160.2(b)2Avi; and b. The maximum sound rating as specified in Section 160.2(b)2Avif. iii. Heat recovery ventilation (HRV) and energy recovery ventilation (ERV) system fan efficacy. At a minimum, systems with heat or energy recovery serving a single dwelling unit shall have a fan efficacy of ≤1.0 W/cfm as confirmed by field verification in accordance with Reference Appendix RA3.7.4.4 or NA2.2.4.1.5 as applicable. If Section 170.2(c)3Biva requirements are applicable to the dwelling unit, then field verification shall instead confirm compliance with the maximum fan efficacy and minimum sensible recovery efficiency specified in Section 170.2(c)3Biva in accordance with the procedures specified in Reference Appendix RA3.7.4.4 or NA2.2.4.1.5 as applicable. iv. In multifamily buildings with four or more habitable stories, the field verification and diagnostic testing required in Sections 160.2(b)2Bi, ii and iii which requires an ECC-Rater may alternatively be performed by a certified Mechanical Acceptance Test Technician according to the requirements specified in Reference Appendix NA1.9. C. Multifamily building central ventilation system field verification. i. Central ventilation system duct sealing. Ventilation ducts that conform to Subsections a and b below shall meet the duct sealing requirements in California Mechanical Code Section 603.10 and have leakage that is no greater than 6 percent of the rooftop fan or central fan design airflow rate as confirmed by field verification in accordance with the procedures in Reference Appendix NA7.18.3. The leakage test shall be conducted using a test pressure of 25 Pa (0.1 inches) for ducts serving six or fewer dwelling units and 50 Pa (0.2 inches) for ducts serving more than six dwelling units, and shall measure the leakage of all ductwork between the central fan and the connection point to the in-unit grille or fan. a. The ventilation ducts serve multiple dwelling units. b. The ventilation ducts provide continuous airflows or airflows to provide balanced ventilation to meet the requirements specified in Section 160.2(b)2Aiv or 160.2(b)2Av as applicable.
Exception to Section 160.2(b)2C: Multifamily buildings with three or fewer habitable stories in Climate Zone 6 are not required to comply with Section 160.2(b)2C.
(c) Common use areas. All occupiable spaces shall comply with the requirements of Subsection 1 and shall also comply with either Subsection 2 or Subsection 3:
- Air filtration.
A. Mechanical system types specified in Subsections i, ii and iii below shall be designed to ensure that all recirculated air and all outdoor air supplied to the occupiable space are filtered before passing through any system’s thermal conditioning components. Air filters shall conform to the requirements of Sections 160.2(c)1B, 160.2(c)1C and 160.2(c)1D.
§ 170.2 High relevance — show source text
Exception 2 to Section 170.2(c)3Bi: The field verification and ECC-Provider data registry requirements of Reference Residential Appendix RA2 and RA3 are not required for multifamily dwelling units in buildings four habitable stories and greater. The installer shall certify that diagnostic testing was performed in accordance with the applicable procedures. ii. Space-conditioning distribution systems. All space-conditioning systems shall meet all applicable requirements of a or b below:
a. High performance attics. Air handlers or ducts are allowed to be in ventilated attic spaces when the roof and ceiling insulation level meet Option B in Table 170.2-A. b. Duct and air handlers located in conditioned space. Duct systems and air handlers of HVAC systems shall be located in conditioned space, and confirmed by field verification and diagnostic testing to meet the criterion of Reference Residential Appendix RA3.1.4.3.8. NOTE: Gas heating appliances installed in conditioned spaces must meet the combustion air requirements of California Mechanical Code Chapter 7, as applicable. iii. Central fan integrated ventilation systems—systems serving individual dwelling units. Central forced air system fans used to provide outside air shall have an air-handling unit fan efficacy less than or equal to the maximum W/cfm specified in a or b below. The airflow rate and fan efficacy requirements in this section shall be confirmed through field verification and diagnostic testing in accordance with all applicable procedures specified in Reference Residential Appendix RA3.3. Central Fan Integrated Ventilation Systems shall be certified to the Energy Commission as Intermittent Ventilation Systems as specified in Reference Residential Appendix RA3.7.4.2.
a. 0.45 W/cfm for gas furnace air-handling units; or b. 0.58 W/cfm for air-handling units that are not gas furnaces. iv. Balanced ventilation systems with heat/energy recovery in Climate Zones 1, 2, 4, 11–14, and 16. A balanced ventilation system with heat or energy recovery shall be used to meet Section 160.2(b)2Aivb1, and shall meet the applicable requirements of Item a or b below: a. In Climate Zones 1, 2, 4, 11–14, and 16, balanced ventilation systems serving individual dwelling units shall:
- Be an energy recovery ventilator (ERV) or heat recovery ventilator (HRV),
- Have a minimum sensible recovery efficiency of 67 percent, rated at 32 degrees Fahrenheit (0 degrees Celsius), and
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- Have a fan efficacy less than or equal to 0.6 W per cfm. These measures shall be confirmed through field verification in accordance with the procedures in RA3.7.4.4 for buildings with three habitable stories or fewer, or the procedures in NA2.2.4.1.5 for buildings with four or more habitable stories.
b. In Climate Zones 1, 2, 4, 11–14, and 16, balanced ventilation systems serving multiple dwelling units in buildings with four or more habitable stories shall:
- Be an ERV or HRV,
§ 1.4.3.1 High relevance — show source text
a. The measured duct leakage shall be equal to or less than 15 percent of air handler airflow as determined utilizing the procedures in Reference Residential Appendix Section RA3.1.4.3.1; or b. The measured duct leakage to outside shall be equal to or less than 10 percent of air handler airflow as determined utilizing the procedures in Reference Residential Appendix Section RA3.1.4.3.4; or c. If it is not possible to meet the duct sealing requirements of either Section 180.2(b)2Aiiia or b, then all accessible leaks shall be sealed and verified through a visual inspection and a smoke test by a certified ECC-Rater utilizing the methods specified in Reference Residential Appendix RA3.1.4.3.5. Exception 1 to Section 180.2(b)2Aiii : duct sealing. Duct systems that are documented to have been previously sealed as confirmed through field verification and diagnostic testing in accordance with procedures in Reference Residential Appendix RA3.1. Exception 2 to Section 180.2(b)2Aiii: duct sealing. Duct systems with less than 40 linear feet as determined by visual inspection. Exception 3 to Section 180.2(b)2Aiii: duct sealing. Existing duct systems constructed, insulated or sealed with asbestos.
Exception 4 to Section 180.2(b)2Aiii: The field verification and ECC-Provider data registry requirements of Reference Residential Appendix RA2 and RA3 are not required for multifamily dwelling units in buildings four stories and greater. The installer shall certify that diagnostic testing was performed in accordance with the applicable procedures. iv. Altered space-conditioning system mechanical cooling. When a space-conditioning system is an air conditioner or heat pump that is altered by the installation or replacement of refrigerant-containing system components such as the compressor, condensing coil, evaporator coil, refrigerant metering device or refrigerant piping, the altered system shall comply with the following requirements: a. All thermostats associated with the system shall be replaced with setback thermostats meeting the requirements of Section 110.2(c). b. In Climate Zones 2 and 8 through 15, air-cooled air conditioners and air-source heat pumps, including but not limited to ducted split systems, ducted package systems, small duct high velocity air systems, and minisplit systems, shall comply with Subsections I and II, unless the system is of a type that cannot be verified using the specified procedures. Systems that cannot comply with the requirements of Section 180.2(b)2Aivb shall comply with Section 180.2(b)2Aivc. Exception to Section 180.2(b)2Aivb: Entirely new or complete replacement packaged systems for which the manufacturer has verified correct system refrigerant charge prior to shipment from the factory are not required to have refrigerant charge confirmed through field verification and diagnostic testing. The installer of these packaged systems shall certify that the packaged system was pre-charged at the factory and has not been altered in a way that would affect the charge. Ducted systems shall comply with the minimum system airflow rate requirement in Section 180.2(b)2AivbI, provided that the system is of a type that can be verified using the procedure specified in RA3.3 or an approved alternative in RA1. I. The minimum system airflow rate shall comply with the applicable Subsection A or B below as confirmed through field verification and diagnostic testing in accordance with the procedures specified in Reference Residential Appendix Section RA3.3 or an approved alternative procedure as specified in Section RA1.
§ 1.0 High relevance — show source text
where:
Q tot = total required ventilation rate, cfm. A floor = dwelling-unit floor area, ft [2] . N br = number of bedrooms (not to be less than 1). b. All dwelling units in a multifamily building shall use the same whole-dwelling unit ventilation system type. The dwelling unit shall comply with Subsections 1 and 2 below.
- Balanced or supply ventilation . A balanced or supply ventilation system shall provide the required whole-dwelling-unit ventilation airflow. Balanced systems with heat recovery or energy recovery that serve a single dwelling unit shall have a fan efficacy of ≤1.0 W/cfm; and
- Compartmentalization testing. The air leakage rate shall not exceed 0.3 cubic feet per minute at 50 Pa (0.2 inch water) per ft [2] of dwelling unit envelope surface area as confirmed by ECC-Rater field verification and diagnostic testing in accordance with the procedures specified in Reference Appendix RA3.8 or NA2.3 as applicable. In multifamily buildings with four or more habitable stories,
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the field verification and diagnostic testing which requires an ECC-Rater may alternatively be performed by a certified Mechanical Acceptance Test Technician according to the requirements specified in Reference Appendix NA1.9. v. Multifamily building central ventilation system airflow rate tolerance. Multifamily building central ventilation systems that serve multiple dwelling units shall have airflow rates in each dwelling unit served that meet or exceed a design ventilation airflow rate specification. a. Designers shall specify a design ventilation airflow rate for each dwelling unit that is equal to or greater than the rate specified by Equation 160.2-B. b. The design ventilation airflow rate for each dwelling unit shall be stated on the building design plans approved by the enforcement agency. c. Airflow in each dwelling unit shall be no more than 20 percent greater than the specified design ventilation airflow rate. Ventilation systems shall utilize mechanical or software airflow control means to ensure each of the dwelling-unit airflows can be maintained at the design ventilation airflow within this tolerance at all times. System airflow control-means may include but are not limited to constant air regulation devices, orifice plates and variable speed central fans. vi. Local mechanical exhaust. A local mechanical exhaust system shall be installed in each kitchen and bathroom. Systems shall be rated for airflow in accordance with ASHRAE 62.2 Section 7.1. a. Nonenclosed kitchens shall have a demand-controlled mechanical exhaust system meeting the requirements of Section 160.2(b)2Avic. b. Enclosed kitchens and all bathrooms shall have either one of the following options 1 or 2:
- A demand-controlled mechanical exhaust system meeting the requirements of Section 160.2(b)2Avic; or
- A continuous mechanical exhaust system meeting the requirements of Section 160.2(b)2Avid. c. Demand-controlled mechanical exhaust. A local mechanical exhaust system shall be designed to be operated as needed.
- Control and operation. Demand-controlled mechanical exhaust systems shall be provided with at least one of the following controls: A. A readily accessible occupant-controlled ON-OFF control. B. An automatic control that does not impede occupant ON control.
- **Ventilation rate and capture efficiency.
§ 160.3 High relevance — show source text
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Exception 1 to Section 160.3(b)5L: The field verification and ECC-Provider data registry requirements of Reference Residential Appendix RA2 and RA3 are not required for multifamily dwelling units in buildings four habitable stories and greater. The installer shall certify that diagnostic testing was performed in accordance with the applicable procedures. Exception 2 to Section 160.3(b)5L: Multifamily dwelling units in buildings four habitable stories and greater in Climate Zone 1.
Piping for space-conditioning systems, solar water-heating system collector loop, and distribution piping for steam and hydronic heating system shall meet the requirements of Section 160.3(c)1.
Defrost .
A. If a heat pump is equipped with a defrost delay timer, the delay timer must be set to greater than or equal to 90 minutes.
B. The installer shall certify on the Certificate of Installation that the control configuration has been tested in accordance with the testing procedure found in the Certificate of Installation. Exception to 160.3(b)7 . Dwelling units in Climate Zones 1, 6 through 10, 15, and 16 shall not be required to comply with the 90-minute delay timer requirements. 8. Capacity variation with third-party thermostats. Variable or multi-speed systems shall comply with the following requirements: A. The space-conditioning system and thermostat together shall be capable of responding to heating and cooling loads by modulating system compressor speed. B. The installer shall certify on the Certificate of Installation that the control configuration has been tested in accordance with the testing procedure found in the Certificate of Installation.
(c) Fluid distribution systems; common area space-conditioning systems. Multifamily buildings shall comply with the applicable requirements of Section 160.3(a)1. Multifamily common areas shall comply with the applicable requirements of Sections 160.3(a)2A through 160.3(a)2J.
- Pipe insulation . Multifamily buildings shall comply with the applicable requirements of Sections 160.3(c)1A through 160.3(c)1D. A. General requirements. The piping conditions listed below for space-conditioning systems with fluid normal operating temperatures listed in Table 160.3-D shall have at least the amount of insulation specified in Section 160.3(c)1D: i. Space cooling systems. All refrigerant suction, chilled water and brine fluid distribution systems. ii. Space heating systems. All refrigerant suction, steam, steam condensate and hot water fluid distribution systems. Exception to Section 160.3(c)1Aii: Heat pumps refrigerant vapor line shall be installed with a minimum of 0.75-inch-thick or R-6.0 insulation. No insulation is required on the refrigerant liquid line. B. Insulation conductivity shall be determined in accordance with ASTM C335 at the mean temperature listed in Table 160.3-D, and shall be rounded to the nearest [1] / 100 Btu-inch per hour per square foot per °F. Fluid distribution systems include all elements that are in series with the fluid flow, such as pipes, pumps, valves, strainers, coil u-bends and air separators, but not including elements that are not in series with the fluid flow, such as expansion tanks, fill lines, chemical feeders and drains.
§ 160.3 High relevance — show source text
Exception 1 to Section 160.3(b)5Liii: Multispeed or variable speed compressor systems, with controls that vary fan speed subject to the number of zones, as certified by the installer may demonstrate compliance with the airflow (cfm/ton) and fan efficacy (watt/cfm) requirements of Section 160.3(b)5Liii by operating the system at maximum compressor capacity and system fan speed with all zones calling for conditioning. Exception 2 to Section 160.3(b)5Liii: Gas furnace air-handling units manufactured prior to July 3, 2019 shall comply with a fan efficacy value less than or equal to 0.58 w/cfm as confirmed by field verification and diagnostic testing in accordance with the procedures given in Reference Residential Appendix RA3.3. iv. Small duct high velocity forced air systems. Demonstrate, in every control mode, airflow greater than or equal to 250 cfm per ton of nominal cooling capacity through the return grilles, and an air-handling unit fan efficacy less than or equal to 0.62 W/cfm as confirmed by field verification and diagnostic testing in accordance with the procedures given in Reference Residential Appendix RA3.3. Exception 1 to Section 160.3(b)5Liv: Standard ducted systems without zoning dampers may comply by meeting the applicable requirements in Table 160.3-A or 160.3-B as confirmed by field verification and diagnostic testing in accordance with the procedures in Reference Residential Appendix Sections RA3.1.4.4 and RA3.1.4.5. The design clean-filter pressure drop requirements specified by Section 160.2(b)1Div for the system air filter(s) shall conform to the requirements given in Table 160.3-A or 160.3-B. Exception 2 to Section 160.3(b)5Liv: Multispeed compressor systems or variable speed compressor systems shall verify airflow (cfm/ton) and fan efficacy (watt/cfm) for system operation at the maximum compressor speed and the maximum air handler fan speed.
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Exception 1 to Section 160.3(b)5L: The field verification and ECC-Provider data registry requirements of Reference Residential Appendix RA2 and RA3 are not required for multifamily dwelling units in buildings four habitable stories and greater. The installer shall certify that diagnostic testing was performed in accordance with the applicable procedures. Exception 2 to Section 160.3(b)5L: Multifamily dwelling units in buildings four habitable stories and greater in Climate Zone 1.
Piping for space-conditioning systems, solar water-heating system collector loop, and distribution piping for steam and hydronic heating system shall meet the requirements of Section 160.3(c)1.
Defrost .
A. If a heat pump is equipped with a defrost delay timer, the delay timer must be set to greater than or equal to 90 minutes.
B. The installer shall certify on the Certificate of Installation that the control configuration has been tested in accordance with the testing procedure found in the Certificate of Installation. Exception to 160.3(b)7 . Dwelling units in Climate Zones 1, 6 through 10, 15, and 16 shall not be required to comply with the 90-minute delay timer requirements. 8. **Capacity variation with third-party thermostats.
§ 1.4.2. High relevance — show source text
K. Duct system sealing and leakage testing. When space-conditioning systems utilize forced air duct systems to supply conditioned air to an individual dwelling unit, the ducts shall be sealed, as confirmed through field verification and diagnostic testing, in accordance with all applicable procedures specified in Reference Residential Appendix RA3.1. Air handler airflow for calculation of duct leakage rate compliance targets shall be determined according to methods specified in Reference Residential Appendix RA3.1.4.2. For multifamily dwellings with the air-handling unit installed and the ducts connected directly to the air handler, regardless of duct system location: i. The total leakage of the duct system shall not exceed 12 percent of the air handler airflow as determined utilizing the procedures in Reference Residential Appendix Section RA3.1.4.3.1; or ii. The duct system leakage to outside shall not exceed 6 percent of the air handler airflow as determined utilizing the procedures in Reference Residential Appendix Section RA3.1.4.3.4.
- Exception 1 to Section 160.3(b)5K: The field verification and ECC-Provider data registry requirements of Reference Residential Appendix RA2 and RA3 are not required for multifamily dwelling units in buildings four
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habitable stories and greater. The installer shall certify that diagnostic testing was performed in accordance with the applicable procedures. Exception 2 to Section 160.3(b)5K: Multifamily dwelling units in buildings four habitable stories and greater in Climate Zones 1, 3, 5 and 7. L. System airflow rate and fan efficacy. Space-conditioning systems that utilize forced air ducts to supply cooling to an individual dwelling unit shall: i. Static pressure probe. Have a hole for the placement of a static pressure probe (HSPP), or a permanently installed static pressure probe (PSPP) in the supply plenum downstream of the air conditioning evaporator coil. The size, location and labeling of the HSPP or PSPP shall conform to the requirements specified in Reference Residential Appendix RA3.3.1.1 as confirmed by field verification and diagnostic testing; and Exception to Section 160.3(b)5Li: Systems that cannot conform to the specifications for hole location in Reference Residential Appendix Figure RA3.3-1 shall not be required to provide holes as described in Figure RA3.3-1.
ii. Single zone central forced air systems. Demonstrate, in every control mode, airflow greater than or equal to 350 cfm per ton of nominal cooling capacity through the return grilles, and an air-handling unit fan efficacy less than or equal to the maximum W/cfm specified in Subsection a or b below. The airflow rate and fan efficacy requirements in this section shall be confirmed by field verification and diagnostic testing in accordance with the procedures given in Reference Residential Appendix RA3.3. a. 0.45 W/cfm for gas furnace air-handling units. b. 0.58 W/cfm for air-handling units that are not gas furnaces. Exception 1 to Section 160.3(b)5Lii: Standard ducted systems without zoning dampers may comply by meeting the applicable requirements in Table 160.3-A or 160.3-B as confirmed by field verification and diagnostic testing in accordance with the procedures in Reference Residential Appendix Sections RA3.1.4.4 and RA3.1.4.5.
Frequently asked questions
Who must be listed on a Certificate of Acceptance when CMATT performs tests?
When a CMATT performs acceptance testing, the CMATT must disclose a valid CMATT certification identification number on the Certificate of Acceptance and complete required documentation per § 160.3(d)3.
Can the installer always avoid ECC‑Rater verification by signing a certificate?
No. Installer certification in lieu of ECC‑Rater verification is only allowed where the code explicitly waives the RA2/RA3 registry requirement (notably multifamily dwelling units in buildings four habitable stories and greater) or where other explicit exceptions apply (e.g., factory precharged packaged units). Otherwise the ECC‑Rater (and registry submittal) is required.
When can a CMATT perform tests that would otherwise require an ECC‑Rater?
The code allows a CMATT to perform the field verification and diagnostic testing that would otherwise require an ECC‑Rater for multifamily buildings with four or more habitable stories, per the referenced NA1.9 alternative. Check NA1.9 for CMATT scope.
Is the ECC‑Provider data registry always required?
No. The ECC‑Provider data registry (RA2/RA3) is generally required for ECC‑Rater submissions, but it is not required for multifamily dwelling units in buildings four habitable stories and greater — in that case the installer must certify that testing was performed.
Which RA3 test procedure applies to refrigerant charge verification?
Standard charge verification uses RA3.2.2; weigh‑in charge procedures are in RA3.2.3.1, with a verification option RA3.2.3.2 under certain conditions (e.g., cold outdoor temperature). The ECC‑Rater normally verifies the charge per RA3 procedures unless an exception applies.
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