CALGreen · California Green Building Standards Code (CALGreen)
What programs are listed as acceptable HVAC training or certification?
CALGreen **§ 702.1** requires HVAC installers to be trained and certified by recognized programs (examples: state apprenticeship, utility, trade/labor, manufacturer programs), or to work only under direct supervision of a certified installer or licensed contractor; local enforcement agencies may accept other programs and will require documentation.
Last reviewed: July 6, 2026
What the code requires — plain English
HVAC system installers must be trained and certified by a nationally or regionally recognized training or certification program for proper HVAC (including duct and equipment) installation. Uncertified workers may only perform HVAC work while under the direct supervision and responsibility of a person who is trained and certified or a contractor licensed to install HVAC systems. This requirement is set out in § 702.1.
The single most important rule: Installers must have recognized HVAC training/certification — or they must work only under the direct supervision of a certified installer or licensed HVAC contractor. § 702.1
Requirements in detail
Core rule (what qualifies)
- The code requires training/certification from a nationally or regionally recognized program (this is the baseline quality expectation). § 702.1
- The code then gives examples of acceptable program types (non‑exhaustive). § 702.1
Examples of acceptable programs (decision-relevant dimensions)
The following table summarizes the program types the code explicitly lists and the practical decision points an enforcing agency or project team will consider.
| Program type (example listed in the code) | Typical format / decision-relevant dimension | What you should document on the job | Code Reference |
|---|---|---|---|
| State certified apprenticeship programs | Multi‑year on‑the‑job + classroom apprenticeship administered/registered with state apprenticeship authority | Apprenticeship completion records, certificate of journeyworker status or training transcripts | § 702.1 |
| Public utility training programs | Utility-sponsored courses (often short courses, certifications or certificates of completion) | Certificate of completion; course description from utility showing HVAC focus | § 702.1 |
| Training programs sponsored by trade, labor, or statewide energy consulting / verification organizations | Trade‑association or labor‑sponsored curricula, energy‑auditor or verification body programs | Certificate or letter from sponsoring organization detailing curriculum and issuer | § 702.1 |
| Programs sponsored by manufacturing organizations | Manufacturer product/system installation training (classroom or factory) — may be model‑ or product‑specific | Manufacturer certificate or attendance form plus description of scope (must show proper installation training) | § 702.1 |
| Other programs acceptable to the enforcing agency | Any other program that the local enforcing agency finds acceptable | Written documentation the enforcing agency relied on (approval letter, checklist) | § 702.1 |
Notes on documentation: CALGreen allows the enforcing agency to verify compliance via construction docs, installer certification, inspection reports or other acceptable methods — plan reviewers/inspectors may request certificates, attendance forms, or signed attestation from the owner or contractor. See § 703.1 for verification methods.
What “trained and certified” means in practice
- The program must be recognized at a regional or national level or be otherwise acceptable to the enforcing agency — the code expects programs to be credible and documented. § 702.1
- The code does not prescribe exact hour counts, course content lists, or a single accepted credential; instead it lists program types and leaves specifics (and acceptance of other programs) to the enforcing agency. § 702.1
Exceptions & special cases
- Uncertified persons may perform HVAC installations only when they are under the direct supervision and responsibility of (a) a person trained and certified to install HVAC systems, or (b) a contractor licensed to install HVAC systems. This supervisory exception is part of § 702.1.
- The code explicitly allows the enforcing agency discretion to accept other training/certification programs not listed; acceptance must come from the enforcing agency (local authority). § 702.1
- Separate qualifications rules apply for special inspectors (see § 702.2), so do not conflate installer certification with special inspector certification/independence.
Common mistakes
- Assuming any short manufacturer orientation automatically satisfies CALGreen: manufacturer programs are acceptable examples, but the program must be sufficient in scope and recognized (or accepted by the enforcing agency). Don’t rely on an unverified one‑hour demo without documentation. § 702.1
- Treating “other programs acceptable to the enforcing agency” as a blanket permission: it requires explicit acceptance by the enforcing agency. § 702.1
- Forgetting to provide documentation at plan check or inspection: CALGreen lists acceptable verification methods (certificates, attendance records, inspection reports, or other methods acceptable to enforcing agency). See § 703.1 for verification.
- Using uncertified installers without continuous direct supervision and responsibility by a certified/licensed person — that violates § 702.1.
- Confusing installer training with special inspector requirements (special inspectors have separate qualification language in § 702.2).
Worked example — concrete scenario
Scenario: A small commercial tenant improvement requires replacement of three rooftop packaged HVAC units. The general contractor hires an HVAC company with three technicians.
- Two technicians hold certificates from a state registered HVAC apprenticeship program. One technician completed a manufacturer’s product‑specific installation course but has no broader certification.
- Plan check: the enforcing agency requests installer qualifications and documentation.
How the code applies:
- The two technicians with state apprenticeship certificates clearly meet the code’s example of acceptable programs (state certified apprenticeship). Provide copies of completion certificates or journey status. § 702.1
- The third technician’s manufacturer course can be acceptable if the program is sufficiently documented and recognized by the enforcing agency; provide the manufacturer certificate plus course syllabus showing installation scope. If the enforcing agency accepts it, that meets § 702.1’s manufacturer‑sponsored program example. § 702.1
- If the third technician must work before the agency accepts that manufacturer course, the technician may work only under the direct supervision and responsibility of one of the certified technicians or the licensed contractor, per § 702.1. Provide on‑site documentation (supervisor’s signature/attestation) at inspection. § 702.1
- Keep the documentation (certificates, attendance forms) available for verification as authorized by § 703.1.
Related provisions
- § 702.2 — Special inspector qualifications (independence and competence requirements).
- § 703.1 — Documentation and verifications the enforcing agency may require (plans, installer certification, inspection reports).
- § 4.410.1 — Operation and maintenance manual requirements (training and O&M information for HVAC systems in the manual at final inspection).
- Related commissioning/training compliance guidance (training program content and enforcement details referenced in compliance forms and commissioning guidance). See the compliance/commissioning discussion on training documentation.
Code references
Grounded in the retrieved California Green Building Standards Code (CALGreen) — click a citation to read the verbatim passage:
CALGreen § 7-1 High relevance — show source text
2025 CALIFORNIA GREEN BUILDING STANDARDS CODE 7-1
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7 INSTALLER AND SPECIAL INSPECTOR QUALIFICATIONS
SECTION 701—GENERAL (RESERVED)
SECTION 702—QUALIFICATIONS
702.1 Installer training. HVAC system installers shall be trained and certified in the proper installation of HVAC systems including ducts and equipment by a nationally or regionally recognized training or certification program. Uncertified persons may perform HVAC installations when under the direct supervision and responsibility of a person trained and certified to install HVAC systems or contractor licensed to install HVAC systems. Examples of acceptable HVAC training and certification programs include but are not limited to the following:
- State certified apprenticeship programs.
- Public utility training programs.
- Training programs sponsored by trade, labor or statewide energy consulting or verification organizations.
- Programs sponsored by manufacturing organizations.
- Other programs acceptable to the enforcing agency.
702.2 Special inspection.
[HCD] When required by the enforcing agency, the owner or the responsible entity acting as the owner’s agent shall employ one or more special inspectors to provide inspection or other duties necessary to substantiate compliance with this code. Special inspectors shall demonstrate competence to the satisfaction of the enforcing agency for the particular type of inspection or task to be performed. In addition to other certifications or qualifications acceptable to the enforcing agency, the following certifications or education may be considered by the enforcing agency when evaluating the qualifications of a special inspector:
- Certification by a national or regional green building program or standard publisher.
- Certification by a statewide energy consulting or verification organization, building performance contractors and home energy auditors.
- Successful completion of a third party apprentice training program in the appropriate trade.
- Other programs acceptable to the enforcing agency.
Note: Special inspectors shall be independent entities with no financial interest in the materials or the project they are inspecting for compliance with this code.
[BSC-CG] When required by the enforcing agency, the owner or the responsible entity acting as the owner’s agent shall employ one or more special inspectors to provide inspection or other duties necessary to substantiate compliance with this code. Special inspectors shall demonstrate competence to the satisfaction of the enforcing agency for the particular type of inspection or task to be performed. In addition, the special inspector shall have a certification from a recognized state, national or international association, as determined by the local agency. The area of certification shall be closely related to the primary job function, as determined by the local agency.
Note: Special inspectors shall be independent entities with no financial interest in the materials or the project they are inspecting for compliance with this code.
SECTION 703—VERIFICATIONS
703.1 Documentation. Documentation used to show compliance with this code shall include but is not limited to, construction documents, plans, specifications, builder or installer certification, inspection reports or other methods acceptable to the enforcing agency which demonstrate substantial conformance. When specific documentation or special inspection is necessary to verify compliance, that method of compliance will be specified in the appropriate section or identified in the application checklist.
2025 CALIFORNIA GREEN BUILDING STANDARDS CODE 7-3
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CALGreen § 702.2 High relevance — show source text
CALIFORNIA GREEN BUILDING STANDARDS CODE – MATRIX ADOPTION TABLE
CHAPTER 7 – INSTALLER AND SPECIAL INSPECTOR QUALIFICATIONS
(Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)
Adopting agency BSC BSC-
CGSFM HCD Col6 Col7 DSA Col9 OSHPD Col11 Col12 Col13 Col14 Col15 BSCC DPH AGR DWR CEC CA SL SLC Adopting agency BSC BSC-
CGSFM 1 2 1/AC AC SS 1 1R 2 3 4 5 5 5 5 5 5 5 5 5 Adopt entire CA chapter X Adopt entire chapter as
amended (amended
sections listed below)Adopt only those sections
that are listed belowX Chapter/Section 702.2 X 703.1 X 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE 7-1
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7 INSTALLER AND SPECIAL INSPECTOR QUALIFICATIONS
SECTION 701—GENERAL (RESERVED)
SECTION 702—QUALIFICATIONS
702.1 Installer training. HVAC system installers shall be trained and certified in the proper installation of HVAC systems including ducts and equipment by a nationally or regionally recognized training or certification program. Uncertified persons may perform HVAC installations when under the direct supervision and responsibility of a person trained and certified to install HVAC systems or contractor licensed to install HVAC systems. Examples of acceptable HVAC training and certification programs include but are not limited to the following:
- State certified apprenticeship programs.
- Public utility training programs.
- Training programs sponsored by trade, labor or statewide energy consulting or verification organizations.
- Programs sponsored by manufacturing organizations.
- Other programs acceptable to the enforcing agency.
702.2 Special inspection.
[HCD] When required by the enforcing agency, the owner or the responsible entity acting as the owner’s agent shall employ one or more special inspectors to provide inspection or other duties necessary to substantiate compliance with this code. Special inspectors shall demonstrate competence to the satisfaction of the enforcing agency for the particular type of inspection or task to be performed. In addition to other certifications or qualifications acceptable to the enforcing agency, the following certifications or education may be considered by the enforcing agency when evaluating the qualifications of a special inspector: 1.
CALGreen § 703.1 High relevance — show source text
Certification by a national or regional green building program or standard publisher. 2. Certification by a statewide energy consulting or verification organization, building performance contractors and home energy auditors. 3. Successful completion of a third party apprentice training program in the appropriate trade. 4. Other programs acceptable to the enforcing agency.
Note: Special inspectors shall be independent entities with no financial interest in the materials or the project they are inspecting for compliance with this code.
[BSC-CG] When required by the enforcing agency, the owner or the responsible entity acting as the owner’s agent shall employ one or more special inspectors to provide inspection or other duties necessary to substantiate compliance with this code. Special inspectors shall demonstrate competence to the satisfaction of the enforcing agency for the particular type of inspection or task to be performed. In addition, the special inspector shall have a certification from a recognized state, national or international association, as determined by the local agency. The area of certification shall be closely related to the primary job function, as determined by the local agency.
Note: Special inspectors shall be independent entities with no financial interest in the materials or the project they are inspecting for compliance with this code.
SECTION 703—VERIFICATIONS
703.1 Documentation. Documentation used to show compliance with this code shall include but is not limited to, construction documents, plans, specifications, builder or installer certification, inspection reports or other methods acceptable to the enforcing agency which demonstrate substantial conformance. When specific documentation or special inspection is necessary to verify compliance, that method of compliance will be specified in the appropriate section or identified in the application checklist.
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CALIFORNIA GREEN BUILDING STANDARDS CODE – MATRIX ADOPTION TABLE
CHAPTER 8 – COMPLIANCE FORMS, WORKSHEETS AND REFERENCE MATERIAL
(Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)
Adopting agency BSC BSC-
CGSFM HCD Col6 Col7 DSA Col9 OSHPD Col11 Col12 Col13 Col14 Col15 BSCC DPH AGR DWR CEC CA SL SLC Adopting agency BSC BSC-
CGSFM 1 2 1/AC AC SS 1 1R 2 3 4 5 5 5 5 5 5 5 5 5 Adopt entire CA chapter X Adopt entire chapter as
amended (amended
sections listed below)Adopt only those sections
that are listedCALGreen § 1104.0. High relevance — show source text
4 only|Any|Any| |E|Group A1 or A2L4 only|Any|Any| |F-1|Group A12 or A2L2,4 only|Any|Any| |F-2|Any2|Any|Any| |H-1|Any|Any|Any| |H-2|Any|Any|Any| |H-3|Any|Any|Any| |H-4|Group A1 or A2L4 only|Any|Any| |H-5|Group A1 or A2L4 only|Any|Any| |I-1|None|Any|Any| |I-2|Group A1 or A2L4 only|Any|Any| |I-3|None|Any|Any| |I-4|Group A1 or A2L4 only|Any|Any| |M|Group A12 or A2L2,4 only|Any|Any| |R-1|Group A1 or A2L4 only|Any|Any| |R-2|Group A1 or A2L4 only|Any|Any| |R-3|Group A1 or A2L4 only|Any|Any| |R-4|Group A1 or A2L4 only|Any|Any| |S-1|Group A12 or A2L2,4 only|Any|Any| |S-2|Any2|Any|Any| |U|Any|Any|Any|
Notes: 1 See Section 1104.0. 2 A refrigerant shall be permitted to be used within a high-probability system where the room or space is in accordance with Section 1104.4. 3 Occupancy classifications are defined in the building code. 4 See Section 1104.6 for requirements applicable to A2L equipment.
independent circuit of high-probability systems shall not exceed the amounts shown in Table 1102.3, except as provided in Section 1104.3, Section 1104.4, and Section 1104.6. The volume of occupied space shall be determined in accordance with Section 1104.2.1 through Section 1104.2.3. Exceptions: (1) Listed equipment in locations other than public corridors and lobbies containing not more than 6.6 pounds (2.99 kg) of refrigerant, regardless of its refrigerant safety classification, provided the equipment is installed in accordance with the listing and with the manufacturer’s installation instructions.
(2) Listed equipment for use in laboratories with more than 100 square feet (9.29 m [2] ) of space per person, regardless of the refrigerant safety classification, provided that the equipment is installed in accordance with the listing and the manufacturer’s installation instructions. {ASHRAE 15:7.2}
1104.2.1 Volume Calculations. The volume used to convert from refrigerant concentration limits to refrigerating system quantity limits for refrigerants in Section 1104.2 shall be based on the volume of space to which refrigerant disperses in the event of a refrigerant leak.
[ASHRAE 15:7.3]
CALGreen § 503.3. High relevance — show source text
Exception : DDC is not required for systems using the simplified approach to compliance in accordance with Section E 503.3. [ASHRAE 90.1:6.4.3.10.1]
E 503.4.6.12.2 DDC Controls. Where DDC is required by Section E 503.4.6.12.1, the DDC
426 2025 CALIFORNIA MECHANICAL CODE
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APPENDIX E
system shall be capable of and configured with all of the following, as required, to provide the control logic required in Section E 503.5:
(1) Monitoring zone and system demand for fan pressure, pump pressure, heating, and cooling.
(2) Transferring zone and system demand information from zones to air distribution system controllers and from air distribution systems to heating and cooling plant controllers.
(3) Automatically detecting those zones and systems that are capable of excessively driving the reset logic and generate an alarm or other indication to the system operator.
(4) Readily allowing operator removal of zone(s) from the reset algorithm. [ASHRAE 90.1:6.4.3.10.2]
E 503.4.6.12.3 DDC Display. Where DDC is required in accordance with Section E 503.4.6.12.1 for new buildings, the DDC system shall be capable of trending and graphically displaying input and output points. [ASHRAE 90.1:6.4.3.10.3]
E 503.4.6.13 Economizer Fault Detection and Diagnostics (FDD). Air-cooled direct-expansion cooling units listed in Tables E 503.7.1(1) and E 503.7.1(2), where an air economizer is installed in accordance with Section E 503.5, shall include a fault detection and diagnostics (FDD) system complying with the following:
(1) The following temperature sensors shall be permanently installed to monitor system operation:
(a) Outdoor air
(b) Supply air
(c) Return air, where required for economizer control
(2) The system shall have the capability of displaying the value of each sensor.
(3) The FDD system or unit controls shall be capable of and configured to provide system status by indicating the following:
(a) Free cooling available
(b) Economizer enabled
(c) Compressor enabled
(d) Heating enabled
(e) Mixed-air low-limit cycle active
(4) The FDD system or unit controls shall have provisions to manually initiate each operating mode so that the operation of compressors, economizers, fans, and the heating system can be independently tested and verified.
(5) The FDD system shall be capable of and configured to detect the following faults:
(a) Air temperature sensor failure/fault
(b) Not economizing when the unit should be economizing
(c) Economizing when the unit should not be economizing
(d) Damper not modulating
(e) Excess outdoor air
(6) The FDD system shall be capable of and configured to report faults to a fault management appli
TABLE E 503.4.6.12.1
DDC APPLICATIONS AND QUALIFICATIONS
[ASHRAE 90.1:6.4.3.10.1]
CALGreen § 509.1 High relevance — show source text
||||||| |Outdoor Air Quality
Reserved||||||| |Innovative Concepts and Local Environmental Conditions|Innovative Concepts and Local Environmental Conditions|Innovative Concepts and Local Environmental Conditions|Innovative Concepts and Local Environmental Conditions|Innovative Concepts and Local Environmental Conditions|Innovative Concepts and Local Environmental Conditions|Innovative Concepts and Local Environmental Conditions| |A4.509.1 Items in this section are necessary to address innovative
concepts or local environmental conditions.||||||| |Item 1||
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| |Item 3||||||| |Installer and Special Inspector Qualifications||||||| |Qualifications|Qualifications|Qualifications|Qualifications|Qualifications|Qualifications|Qualifications| |702.1 HVAC system installers are trained and certified in the proper
installation of HVAC systems.||||||| |702.2 Special inspectors employed by the owner or owner's agent
must be qualified and able to demonstrate competence in the
discipline they are inspecting to the enforcing agency.||||||| |Verifications||||||| |703.1Verification of compliance with this code may include
construction documents, plans, specifications builder or installer
certification, inspection reports or other methods acceptable to the
enforcing agency which show substantial conformance.||||||| |1. Green building measures listed in this table may be mandatory if adopted by a city, county, or city and county as specified in Section 101.7.
2. Required prerequisite for this Tier.
3. These measures are currently required elsewhere in statute or in regulation.|1. Green building measures listed in this table may be mandatory if adopted by a city, county, or city and county as specified in Section 101.7.
2. Required prerequisite for this Tier.
3. These measures are currently required elsewhere in statute or in regulation.|1. Green building measures listed in this table may be mandatory if adopted by a city, county, or city and county as specified in Section 101.7.
2. Required prerequisite for this Tier.
3. These measures are currently required elsewhere in statute or in regulation.|1. Green building measures listed in this table may be mandatory if adopted by a city, county, or city and county as specified in Section 101.7.
2. Required prerequisite for this Tier.
3. These measures are currently required elsewhere in statute or in regulation.|1. Green building measures listed in this table may be mandatory if adopted by a city, county, or city and county as specified in Section 101.7.
2. Required prerequisite for this Tier.
3. These measures are currently required elsewhere in statute or in regulation.|1.CALGreen § 504.2.1.3 High relevance — show source text
- Testing should be conducted with the HVAC system operated at the minimum design outdoor air ventilation rate.
- Air samplers and monitors should be located near likely sources of formaldehyde and other volatile organic compounds, at a height of 3 to 6 feet from the floor and well away from walls and air diffusers.
- The test protocols should be justified with documentation to show that appropriate sampling methods and times were used.
A5.504.2.1.3 Noncomplying building areas. For each sampling area of the building exceeding the maximum concentrations specified in Section A5.504.2.1.1, flush out with outside air and retest samples taken from the same area. Repeat the procedures until testing demonstrates compliance.
Note: US EPA-recognized testing protocols may be found on the Air Resources Board web site.
A5.504.4.5.1 No added formaldehyde Tier 1. Use composite wood products approved by the California Air Resources Board (ARB) as no-added formaldehyde (NAF) based resins or ultra-low emitting formaldehyde (ULEF) resins.
Notes:
- See Title 17, Section 93120.3(c) and (d), respectively.
- Documentation must be provided verifying that materials are certified to meet the pollutant emission limits. A list of manufacturers and their NAF and ULEF certified materials is provided at: http://www.arb.ca.gov/toxics/ compwood/naf_ulef/listofnaf_ulef.htm.
A5.504.4.7 Resilient flooring systems, Tier 1. Where resilient flooring is installed, at least 90 percent of floor area receiving resilient flooring shall meet the requirements of the California Department of Public Health, “Standard Method for the Testing and Evaluation of Volatile Organic Chemical Emissions from Indoor Sources Using Environmental Chambers,” Version 1.2, January 2017 (Emission testing method for California Specification 01350).
See California Department of Public Health’s website for certification programs and testing labs.
https://www.cdph.ca.gov/Programs/CCDPHP/DEODC/EHLB/IAQ/Pages/VOC.aspx#material
A5.504.4.7.1 Resilient flooring systems, Tier 2. Where resilient flooring is installed, 100 percent of floor area receiving resilient flooring shall meet the requirements of the California Department of Public Health, “Standard Method for the Testing and Evaluation of Volatile Organic Chemical Emissions from Indoor Sources Using Environmental Chambers,” Version 1.2, January 2017 (Emission testing method for California Specification 01350).
See California Department of Public Health’s website for certification programs and testing labs.
https://www.cdph.ca.gov/Programs/CCDPHP/DEODC/EHLB/IAQ/Pages/VOC.aspx#material
A5.504.4.7.2 Verification of compliance. Documentation shall be provided verifying that resilient flooring materials meet the pollutant emission limits.
A5.504.4.8 Thermal insulation, Tier 1. Thermal insulation, No-added Formaldehyde. Install thermal insulation which complies with Tier 1 plus does not contain any added formaldehyde.
CALGreen § 8.1.3.4 High relevance — show source text
resistance rating as the enclosure. [NFPA 96:8.1.3.4 – 8.1.3.6]
511.1.3 Utility Set Exhaust Fans. Utility set exhaust fans shall be installed in accordance with Section
511.1.3.1 through Section 511.1.3.3.
511.1.3.1 At the Rooftop. Fans installed at the rooftop termination point shall be in accordance with the following:
(1) Section 510.9.1 and Section 510.9.1.2.
(2) Vibration isolation connectors shall be permitted.
(3) A drain shall be directed to a readily accessible and visible grease receptacle not to exceed 1 gallon (4 L).
511.1.3.2 Within the Building. Fans installed within the building shall be in accordance with the following:
(1) Located in an accessible area of adequate size to allow for service or removal. [NFPA 96:8.1.4.2]
(2) Flexible connectors shall not be used. [NFPA 96:8.1.4.6]
(3) Exhaust fans shall have a drain directed to a readily accessible and visible grease receptacle not to exceed 1 gallon (4 L). [NFPA 96:8.1.4.7]
511.1.3.3 Duct Systems. Where the duct system connected to the fan is in an enclosure, the space or room in which the exhaust fan is located shall have
the same fire resistance rating as the enclosure. The fan shall be connected to the exhaust duct by flanges securely bolted as shown in Figure 511.1.2(1) through Figure 511.1.2(4) or by a system specifically listed for such use. [NFPA 96:8.1.4.3, 8.1.4.5]
511.1.4 Construction. Exhaust fan housings shall be constructed of carbon steel not less than 0.060 inch (1.524 mm) (No. 16 MSG) in thickness, of stainless steel not less than 0.048 of an inch (1.219 mm) (No. 18 MSG) in thickness, or, if listed, in accordance with the terms of the listing. [NFPA 96:8.1.5]
511.1.5 Openings. Openings for cleaning, servicing, and inspection shall conform to the requirements of Section 510.3.2. Clearances shall conform to the requirements of
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EXHAUST SYSTEMS
Section 507.4 through Section 507.4.3.3, or Section 510.7.3 and Section 510.7.4 if installed within an enclo sure. [NFPA 96:8.1.6.1, 8.1.6.2] 511.1.6 Standard. All wiring and electrical equipment shall comply with California Electrical Code . [NFPA 96:8.1.7] 511.2 Airflow. The air velocity through a duct shall be not less than 500 feet per minute (ft/min) (2.54 m/s) and not exceed 2500 ft/min (12.7 m/s).
CALGreen § 4.409 High relevance — show source text
SECTION 4.409—LIFE CYCLE ASSESSMENT (RESERVED)
SECTION 4.410—BUILDING MAINTENANCE AND OPERATION
4.410.1 Operation and maintenance manual. At the time of final inspection, a manual, compact disc, web-based reference or other media acceptable to the enforcing agency which includes all of the following shall be placed in the building:
Directions to the owner or occupant that the manual shall remain with the building throughout the life cycle of the structure.
Operation and maintenance instructions for the following: a. Equipment and appliances, including water-saving devices and systems, HVAC systems, photovoltaic systems, electric vehicle chargers, water-heating systems and other major appliances and equipment. b. Roof and yard drainage, including gutters and downspouts. c. Space conditioning systems, including condensers and air filters. d. Landscape irrigation systems.
e. Water reuse systems. 3. Information from local utility, water and waste recovery providers on methods to further reduce resource consumption, including recycle programs and locations. 4. Public transportation and/or carpool options available in the area. 5. Educational material on the positive impacts of an interior relative humidity between 30–60 percent and what methods an occupant may use to maintain the relative humidity level in that range. 6. Information about water-conserving landscape and irrigation design and controllers which conserve water. 7. Instructions for maintaining gutters and downspouts and the importance of diverting water at least 5 feet away from the foundation.
- Information on required routine maintenance measures, including, but not limited to, caulking, painting, grading around the building, etc.
- Information about state solar energy and incentive programs available.
- A copy of all special inspection verifications required by the enforcing agency or this code.
- Information from the Department of Forestry and Fire Protection on maintenance of defensible space around residential
structures.
- Information and/or drawings identifying the location of grab bar reinforcements.
4.410.2 Recycling by occupants. Where 5 or more multifamily dwelling units are constructed on a building site, provide readily accessible area(s) that serves all buildings on the site and are identified for the depositing, storage and collection of nonhazardous materials for recycling, including (at a minimum) paper, corrugated cardboard, glass, plastics, organic waste and metals, or meet a lawfully enacted local recycling ordinance, if more restrictive.
Exception: Rural jurisdictions that meet and apply for the exemption in Public Resources Code Section 42649.82 (a)(2)(A) et seq. are not required to comply with the organic waste portion of this section.
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4 RESIDENTIAL MANDATORY MEASURES
DIVISION 4.5 – ENVIRONMENTAL QUALITY
SECTION 4.501—GENERAL
4.501.1 Scope. The provisions of this chapter shall outline means of reducing the quantity of air contaminants that are odorous, irritating and/or harmful to the comfort and well- being of a building’s installers, occupants and neighbors.
SECTION 4.502—DEFINITIONS
4.502.1 Definitions. The following terms are defined in Chapter 2.
AGRIFIBER PRODUCTS.
COMPOSITE WOOD PRODUCTS.
DIRECT-VENT APPLIANCE.
MAXIMUM INCREMENTAL REACTIVITY (MIR).
MOISTURE CONTENT.
CALGreen § 7-1 Medium relevance — show source text
d.: Replace Table 7-1, 8-1, 8-2, or 9-1 with Table 4-A.
(5) ASHRAE 170. Section 6.9 -- See also Section 605.2 and 605.3.
(6) ASHRAE 170. Section 7.1a -- Modify as follows:
Replace reference to Table 7-1 with reference to Table 4-A.
(7) ASHRAE 170. Section 7.2.1 c -- Not adopted.
(8) ASHRAE 170. Section 7.2.2 Also see Section 415.0.
(9) ASHRAE 170. Section 7.2.3 -- Not adopted.
(10)ASHRAE 170. Section 7.3.1 -- Modify as follows:
Replace reference to Table 7-1 with reference to Table 4-A.
(11) ASHRAE 170. Section 7.4.1 -- Modify as follows:
Delete the Exception that allows for high return grilles.
(12)ASHRAE 170. Section 8.1a -- Modify as follows: Replace reference to Table 8-1 with reference to Table 4-A.
(13)ASHRAE 170. Section 8.2 -- Modify as follows: Replace reference to Table 8-2 with reference to Table 4-A.
(14)ASHRAE 170. Section 9.1a -- Modify as follows: Replace reference to Table 9-1 with reference to Table 4-A.
2025 CALIFORNIA MECHANICAL CODE 69
), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.
VENTILATION AIR
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402.2.1.5 Corner Openings. For zones with operable openings on two adjacent sides of a zone, the distance from the operable openings shall be not more than 5 H along a line drawn between the two openings that are farthest apart. Floor area outside that line shall comply with Section 402.2.1.1 as a zone having openings on only one side of the zone.
[ASHRAE 62.1:6.4.1.5]
402.2.1.6 Location and Size of Openings. Zones or portions of zones to be naturally ventilated shall have a permanently open airflow path to openings directly connected to the outdoors. The minimum flow rate to the zone shall be determined in accordance with
Section 403.2.1. This flow rate shall be used to deter mine the required openable area of openings, accounting only for buoyancy-driven flow. Wind-driven flow shall be used only where it can be demonstrated that the minimum flow rate is provided during all occupied hours. Openings shall be sized in accordance with Section 402.2.1.6(A). Permanently open airflow path shall include, but not be limited to, pathways that would allow airflow unimpeded by partitions, walls, and furnishings. {ASHRAE 62.1:6.4.1.6}
CALGreen § 6.2.2 Medium relevance — show source text
6.2.2 Compliance Method:
The written training program includes: (a) learning goals and objectives for each session, (b) training agenda, topics and length of instruction for each session, (c) instructor information and qualifications, (d) location of training sessions (on-site, off-site, manufacturer’s or vendor’s facility), (e) attendance forms, (f) training materials and (g) description on how the training will be archived for future use.
- Systems/equipment overview a. Review OPR and BOD related to the major systems and equipment b. Describe system type and configuration c. Explain operation of all major systems and equipment and how it interfaces with other systems and equipment d. Describe operation of critical devices, controls and accessories e. Review location of the major systems and equipment f. Describe operation of control system for each system, location of critical control elements and procedures to properly operate control system g. Review recommendations for implementation to reduce energy and water use
- Review and demonstration of servicing/preventive maintenance a. Explain location or delivery contact of the Operation & Maintenance manuals b. Review of all manufacturer’s recommended maintenance activities to maintain warranty c. Review and demonstrate frequent maintenance activities and suggested schedule d. Review and demonstrate typical servicing procedures and techniques (electrical current, pressure and flow readings, etc.; calibration procedures, point trending, power fail restart procedures, etc.) e. Locate, observe and identify major equipment, systems, accessories and controls f. Review emergency shut-offs and procedures
- Review the information in the systems manual a. Describe use of systems manual b. Review elements of systems manual c. Explain how to update and add revisions to systems manual
- Review record drawings on the systems/equipment a. Explain location or delivery contact of the record drawings b. Review record drawings, revisions and changes to original design drawings. c. Review equipment schedules and compare with actual installed systems
6.2.3 Enforcement:
At their discretion, the inspector confirms demonstrated compliance during on-site enforcement by:
- In the event appropriate maintenance staff is made available to receive training for each equipment type and/or system installed in the building. a. Receipt of a copy of the written training program and completed attendance forms, or b. Receipt of a form signed by the owner or owner’s representative attesting that the training program and delivery of training has been completed.
- In the event appropriate maintenance staff are unavailable to receive training for each equipment type and/or system installed in the building. a. Receipt of a copy of the training program provided to the owner or owner’s representative, or b. Receipt of a form signed by the owner or owner’s representative attesting that the written training program has been provided.
2025 CALIFORNIA GREEN BUILDING STANDARDS CODE 8-21
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
COMPLIANCE FORMS, WORKSHEETS AND REFERENCE MATERIAL
Reference: 7 Commissioning report
CALGreen Section 5.410.2.6, Commissioning report.
7.1 Intent:
The commissioning report documents the commissioning process and test results. The report includes confirmation from the commissioning agent verifying that commissioned systems meet the conditions of the Owner’s Project Requirements (OPR), Basis of Design (BOD) and contract documents.
7.2 Compliance Method:
CALGreen § 6-2021 Medium relevance — show source text
ANSI/NEMA WD 6-2021 Wiring Devices—Dimensional Specifications
ANSI Z21.40.4a-1998 (R2022)/CGA 2.94a-M98 (R2022) Performance Testing and Rating of Gas-Fired, Air-Conditioning and Heat Pump Appliances
ANSI Z21.47-2021/CSA 2.3:21 Gas-Fired Central Furnaces
288 2025 CALIFORNIA ENERGY CODE
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
STANDARDS AND DOCUMENTS REFERENCED IN THE ENERGY CODE
ANSI Z83.8-2016/CSA 2.6-2016 (R2021)
Gas Unit Heaters, Gas Packaged Heaters, Gas Utility Heaters and Gas-Fired Duct Furnaces (2016)
Available from:
American National Standards Institute 25 West 43rd Street, 4th floor New York, NY 10036 (212) 642-4900
ANSI/APSP/ICC-5-2011 American National Standard For Residential Inground Swimming Pools (2011 w/Addendum A)
Available from: Association of Pool & Spa Professionals 2111 Eisenhower Ave. Alexandria, VA 22314 (703) 838-0083
AMERICAN SOCIETY OF HEATING, REFRIGERATING AND AIR-CONDITIONING ENGINEERS (NATIONAL PUBLICATIONS)
ASHRAE GUIDELINE 36-2021 High-Performance Sequences of Operation for HVAC Systems
ANSI/ASHRAE Standard 52.2-2017
Method of Testing General Ventilation Air-Cleaning Devices for Removal Efficiency by Particle Size
ANSI/ASHRAE Standard 55-2023
Thermal Environment Conditions for Human Occupancy
ANSI/ASHRAE Standard 62.1-2022 Ventilation and Acceptable Indoor Air Quality
ANSI/ASHRAE Standard 62.2-2022
Ventilation and Acceptable Indoor Air Quality in Residential Buildings
ANSI/ASHRAE Standard 84-2020 Method of Testing Air-to-Air Heat/Energy Exchangers
ANSI/ASHRAE/IES Standards 90.1-2022 Energy Standard for Sites and Buildings Except Low-Rise Residential Buildings
ANSI/ASHRAE Standard 154-2022 Ventilation for Commercial Cooking Operations
ANSI/ASHRAE Standard 193-2010 (RA2014) Method of Test for Determining the Airtightness of HVAC Equipment
ASHRAE Handbooks
2023 ASHRAE Handbook - HVAC Applications Inch-Pound Edition
2020 ASHRAE Handbook - HVAC Systems and Equipment I-P Edition
2021 ASHRAE Handbook - Fundamentals I-P Edition
Available from: American Society of Heating,
Refrigerating and Air Conditioning Engineers(ASHRAE) 1791 Tullie Circle N.E. Atlanta, GA 30329 www.ashrae.org
AMERICAN SOCIETY OF HEATING, REFRIGERATING AND AIR-CONDITIONING ENGINEERS (REGIONAL PUBLICATION)
ASHRAE Climatic Data for Region X Arizona, California, Hawaii, Nevada, Publication SPCDX, 1982, ISBN #20002196 and Supplement, 1994, ISBN #20002596
Available from: Order Desk Building News 10801 National Boulevard Los Angeles, CA 90064 (800) 873-6397 or (310) 474-7771 www.bnibooks.com/
Frequently asked questions
What counts as “documentation” to prove an installer is certified?
Acceptable documentation includes certificates of completion, apprenticeship completion records, attendance forms, program descriptions from the sponsoring organization, or other documentation the enforcing agency accepts. Verification methods are described in § 703.1.
Can a one‑day manufacturer seminar qualify an installer?
Potentially — manufacturer‑sponsored programs are listed as examples in § 702.1, but acceptance depends on the program’s scope and whether the enforcing agency accepts it. Provide the certificate plus course syllabus and be prepared to show it meets installation competency expectations.
May an uncertified helper perform hands‑on work?
Yes, only if the helper works under the direct supervision and responsibility of a certified installer or a licensed contractor as permitted in § 702.1.
Who decides if an “other” program is acceptable?
The local enforcing agency has discretion to accept other programs; keep written evidence of that acceptance for inspections or plan review. § 702.1 authorizes this.
Are special inspectors covered by the same training rules?
No — special inspectors are addressed separately in § 702.2, which sets competence and independence expectations.
More in California Green Building Standards Code (CALGreen)
- Administration (Chapter 1)
- Nonresidential Voluntary Measures (Appendix A5 — divisions A5.1–A5.6, electives & verification)
- Residential Mandatory Measures — Planning & Design; Energy; Water; Materials; Environmental Quality (Chapter 4)
- Definitions (Chapter 2)
- Voluntary Standards for Health Facilities (Appendix A6 / OSHPD guidance)
- Green Building – scope, mixed occupancies, phased projects (Chapter 3)
- Residential Voluntary Measures (Appendix A4 — divisions A4.1–A4.6, tiers & model ordinance)
- Nonresidential Mandatory Measures — Planning & Design; Energy; Water; Materials; Environmental Quality (Chapter 5)
- Compliance verification, construction documents & checklists (Section 102, Chapter 7, Appendix checklists)
- Referenced Organizations and Standards (Chapter 6)
- Voluntary Tiers and CALGreen Tier 1 / Tier 2 (performance tiers, thresholds)
- Installer and Special Inspector Qualifications (Chapter 7)
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