When must I call for an inspection?

Work requiring a permit must be inspected by the AHJ; the code lists required inspections (underground, rough‑in, final) and allows the AHJ to require additional inspections or set inspection notice periods (see §105.2) .

Can a gas supplier turn on service before a final inspection?

No — the code permits issuance of a certificate of final piping inspection and expressly makes it unlawful for a gas supplier to turn on service until that certificate is issued (see §1304.0 and §1304.3) .

What enforcement actions can the AHJ take for violations?

The AHJ may issue notices of correction/violation, assess penalties, issue stop orders, disconnect utilities in emergencies, and condemn unsafe systems; the code also describes right‑of‑entry procedures for inspections (see §106.0 and §103.4) .

Inspections, Certificates & Enforcement

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

CMC § 1303.3.2 High relevance — show source text
1303.3.2 Final Piping Inspection. This inspection shall be made after piping authorized by the permit has been installed and after portions thereof that are to be covered or concealed are so concealed and before fixture, appliance, or shutoff valve has been attached thereto. This inspection shall comply with Section 1313.1. Test gauges used in conducting tests shall be in accordance with Section 1303.3.3 through Section 1303.3.3.4.

2025 CALIFORNIA MECHANICAL CODE 275

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FUEL GAS PIPING

1303.3.3 Test Gauges. Tests required by this code, which are performed utilizing dial gauges, shall be limited to gauges having the following pressure graduations or increments.

1303.3.3.1 Pressure Tests (10 psi or less). Required pressure tests of 10 psi (69 kPa) or less shall be performed with gauges of 0.10 psi (0.69 kPa) increments or less.

1303.3.3.2 Pressure Tests (greater than 10 psi to 100 psi). Required pressure tests exceeding 10 psi (69 kPa) but less than or equal to 100 psi (689 kPa) shall be performed with gauges of 1 psi (7 kPa) increments or less.

1303.3.3.3 Pressure Tests (exceeding 100 psi). Required pressure tests exceeding 100 psi (689 kPa) shall be performed with gauges of 2 percent increments or less of the required test pressure.

1303.3.3.4 Pressure Range. Test gauges shall have a pressure range not exceeding twice the test pressure applied.

1303.4 Inspection Waived. In cases where the work authorized by the permit consists of a minor installation of additional piping to piping already connected to a gas meter, the foregoing inspections shall be permitted to be waived at the discretion of the Authority Having Jurisdiction. In this event, the Authority Having Jurisdiction shall make such inspection as deemed advisable in order to be assured that the work has been performed in accordance with the intent of this code.

1304.0 Certificate of Inspection.

1304.1 Issuance. Whereupon final piping inspection, the installation is found to be in accordance with the provisions of this code, a certificate of inspection shall be permitted to be issued by the Authority Having Jurisdiction.

1304.2 Gas Supplier. A copy of the certificate of such final piping inspection shall be issued to the serving gas supplier supplying gas to the premises.

1304.3 Unlawful. It shall be unlawful for a serving gas supplier or person furnishing gas, to turn on or cause to be turned on, fuel gas or a gas meter or meters until such certificate of final inspection, as herein provided, has been issued.

1305.0 Authority to Render Gas Service.

1305.1 Authorized Personnel. It shall be unlawful for a

person, firm, or corporation, excepting an authorized agent or employee of a person, firm, or corporation engaged in the business of furnishing or supplying gas and whose service pipes supply or connect with the particular premises, to turn on or reconnect gas service in or on a premises where gas service is, at the time, not being rendered.
CMC § 1302.0 Medium relevance — show source text
1302.0 Coverage of Piping System . . . . . 275

1302.1 General. . . . . . . . . . . . . . . . . . . . . 275

1302.2 Piping System Requirements . . . . 275

1302.3 Applications . . . . . . . . . . . . . . . . . 275

1303.0 Inspection . . . . . . . . . . . . . . . . . . . 275

1303.1 Inspection Notification . . . . . . . . . 275

1303.2 Excavation . . . . . . . . . . . . . . . . . . 275

1303.3 Type of Inspections . . . . . . . . . . . 275

1303.4 Inspection Waived . . . . . . . . . . . . 276

1304.0 Certificate of Inspection . . . . . . . . 276

1304.1 Issuance . . . . . . . . . . . . . . . . . . . . 276

1304.2 Gas Supplier. . . . . . . . . . . . . . . . . 276

1304.3 Unlawful . . . . . . . . . . . . . . . . . . . . 276

1305.0 Authority to Render Gas Service . . 276

1305.1 Authorized Personnel . . . . . . . . . . 276

1305.2 Outlets . . . . . . . . . . . . . . . . . . . . . 276

1306.0 Authority to Disconnect. . . . . . . . . 276

1306.1 Disconnection . . . . . . . . . . . . . . . . 276

1306.2 Notice . . . . . . . . . . . . . . . . . . . . . . 276

1306.3 Capped Outlets. . . . . . . . . . . . . . . 276

1307.0 Temporary Use of Gas . . . . . . . . . 276

1307.1 General. . . . . . . . . . . . . . . . . . . . . 276

1308.0 Gas Piping System Design, Materials, and Components . . . . . 276

1308.1 Installation of Piping System . . . . 276

1308.2 Interconnections Supplying Separate Users. . . . . . . . . . . . . . . 276

1308.3 Sizing of Gas Piping Systems . . . 277

1308.4 Acceptable Piping Materials and Joining Methods . . . . . . . . . . 277

Table 1308.3.1 Approximate Gas Input for Typical Appliances . . . . . . . . . . . . 277

Table 1308.4.6.2 Specifications for Threading Metallic Pipe . . . . . . . . . . . . . . . . . 278

1308.5 Gas Meters . . . . . . . . . . . . . . . . . . 280

1308.6 Gas Pressure Regulators . . . . . . . 280

1308.7 Overpressure Protection. . . . . . . . 281

2025 CALIFORNIA MECHANICAL CODE

xlii
CMC § 1.8.4.1 Medium relevance — show source text
**_ 1.8.4.1 Permits. A written construction permit shall be obtained from the enforcing agency prior to the erection, construction, reconstruction, installation, relocation, or alteration of any mechanical system. Exceptions: (1) Work exempt from permits as specified in Chapter 1, Scope and Administration, Division II, Section 104.2 Items (1) through (5) of this code. (2) Changes, alterations, or repairs of a minor nature not affecting structural features, egress, sanitation, safety, or accessibility as determined by the enforcing agency.

(3) Retroactive permits issued in accordance with Health and Safety Code Section 17958.12.

Exemptions from permit requirements shall not be deemed to grant authorization for any work to be done in any manner in violation of other provisions of law or this code. 1.8.4.2 Fees. Subject to other provisions of law, the governing body of any city, county, or city and county may prescribe fees to defray the cost of enforcement of rules and regulations promulgated by the Department of Housing and Community Development. The amount of the fees shall not exceed the amount reasonably neces- sary to administer or process permits, certificates, forms, or other documents, or to defray the costs of enforcement. For additional information, see State Housing Law, Health and Safety Code, Division 13, Part 1.5, Section 17951 and California Code of Regulations, Title 25, Divi- sion 1, Chapter 1, Subchapter 1, Article 3, commencing with Section 6.

1.8.4.3 Plan Review and Time Limitations. Subject to other provisions of law, provisions related to plan checking, prohibition of excessive delays, and contracting with or employment of private parties to perform plan checking are set forth in the State Housing Law, Health and Safety Code Section 17960.1, and for employee housing, in Health and Safety Code Section 17021. 1.8.4.3.1 Retention of Plans. The building depart- ment of every city, county, or city and county shall maintain an official copy, microfilm, or electronic or other type of photographic copy of the plans of every building, during the life of the building, for which the department issued a building permit. Exceptions: (1) Single or multiple dwellings not more than two stories and basement in height. (2) Garages and other structures appurtenant to buildings listed in Exception 1. (3) Farm or ranch buildings appurtenant to build- ings listed in Exception 1. (4) Any one-story building where the span between bearing walls does not exceed 25 feet (7620 mm), except a steel frame or concrete building. All plans for common interest developments as defined in Section 4100 of the California Civil Code shall be retained. For additional information regarding plan retention and reproduction of plans by an enforcing agency, see Health and Safety Code Sections 19850 through 19852. 1.8.4.4 Inspections. Construction or work for which a permit is required shall be subject to inspection by the building official and such construction or work shall remain accessible and exposed for inspection purposes _until approved.
CMC § 105.0 Medium relevance — show source text
(2) Refunding of not more than a percentage, as determined by this jurisdiction where no work has been done under a permit issued in accordance with this code.

The Authority Having Jurisdiction shall not authorize refunding of a fee paid except upon written application filed by the original permittee not to exceed 180 days after the date of fee payment.

105.0 Inspections and Testing. 105.1 General. Mechanical systems for which a permit is required by this code shall be inspected by the Authority Having Jurisdiction.

No mechanical system or portion thereof shall be covered, concealed, or put into use until inspected and approved as prescribed in this code. Neither the Authority Having Jurisdiction nor the jurisdiction shall be liable for expense entailed in the removal or replacement of material required to permit inspection. Mechanical systems regulated by this code shall not be connected to the energy fuel supply lines until authorized by the Authority Having Jurisdiction.

105.2 Required Inspections. New mechanical system work and such portions of existing systems as affected by new work, or changes, shall be inspected by the Authority Having Jurisdiction to ensure compliance with the requirements of this code and to ensure that the installation and construction of the mechanical system are in accordance with approved plans. The Authority Having Jurisdiction shall make the following inspections and other such inspections as necessary. The permittee or the permittee’s authorized agent shall be responsible for the scheduling of such inspections as follows:

(1) Underground inspection shall be made after trenches or ditches are excavated and bedded, piping installed, and before backfill is put in place.

(2) Rough-in inspection shall be made prior to the installation of wall or ceiling membranes.

(3) Final inspection shall be made upon completion of the installation.

105.2.1 Uncovering. Where a mechanical system, or part thereof, which is installed, altered, or repaired, is covered or concealed before being inspected, tested, and approved as prescribed in this code, it shall be uncovered for inspection after notice to uncover the work has been issued to the responsible person by the Authority Having Jurisdiction. The requirements of this section shall not be considered to prohibit the operation of mechanical systems installed to replace existing equipment serving

24 2025 CALIFORNIA MECHANICAL CODE

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

DIVISION II SCOPE AND ADMINISTRATION

an occupied portion of the building in the event a request for inspection of such equipment has been filed with the Authority Having Jurisdiction not more than 72 hours after such replacement work is completed, and before a portion of such mechanical system is concealed by a permanent portion of the building. 105.2.2 Other Inspections. In addition to the inspections required by this code, the Authority Having Jurisdiction shall be permitted to require other inspections to ascertain compliance with the provisions of this code and other laws that are enforced by the Authority Having Jurisdiction.

105.2.3 Inspection Requests. It shall be the duty of the person doing the work authorized by a permit to notify the Authority Having Jurisdiction that such work is ready for inspection. The Authority Having Jurisdiction shall be permitted to require that a request for inspection be filed not less than 1 working day before such inspection is desired. Such request shall be permitted to be made in writing or by telephone, at the option of the Authority Having Jurisdiction.

It shall be the duty of the person requesting inspections in accordance with this code to provide access to and means for inspection of such work.

CMC § 801.0 Medium relevance — show source text

C. PASS / FAIL Evaluation (check one):	Col2
	PASS: All Construction Inspection responses are complete and all Testing Results responses are “Pass.”
	FAIL: Any Construction Inspection responses are incomplete_OR_ there is one or more “Fail” responses in Testing Results section. Provide explanation below. Use and attach additional pages if necessary.

2025 CALIFORNIA MECHANICAL CODE 509

APPENDIX E

CERTIFICATE OF ACCEPTANCE MECH-8A	Col2
Valve Leakage Test (Page 1 of 2)	Valve Leakage Test (Page 1 of 2)
Project Name/Address:	Project Name/Address:
System Name or Identification/Tag:	System Location or Area Served:

Enforcement Agency:	Permit Number:
Note: Submit one Certificate of Acceptance for each system that must demonstrate compliance.	Enforcement Agency Use: Checked by/Date

FIELD TECHNICIAN’S DECLARATION STATEMENT

I certify under penalty of perjury the information provided on this form is true and correct.
I am the person who performed the acceptance requirements verification reported on this Certificate of Acceptance (Field Technician).

• I certify that the construction/installation identified on this form complies with the acceptance requirements indicated in the plans and specifications approved by the enforcement agency, and conforms to the applicable acceptance requirements and procedures specified in Section E 801.0 through Section E 806.0. • I have confirmed that the Installation Certificate(s) for the construction/installation identified on this form has been completed and is posted or made available with the building permit(s) issued for the building.	Col2	Col3
Company Name:	Company Name:	Company Name:
Field Technician’s Name:	Field Technician’s Name:	Field Technician’s Signature:
	Date Signed:	Position with Company (Title):

RESPONSIBLE PERSON’S DECLARATION STATEMENT

I certify under penalty of perjury that I am the Field Technician, or the Field Technician is acting on my behalf as my employee or my agent and I have reviewed the information provided on this form.
I am a licensed contractor or registered design professional who is eligible per the requirements of the Authority Having Jurisdiction to take responsibility for the scope of work specified on this document and attest to the declarations in this statement (responsible person).
I certify that the information provided on this form substantiates that the construction/installation identified on this form complies with the acceptance requirements indicated in the plans and specifications approved by the enforcement agency, and conforms to the applicable acceptance requirements and procedures specified in Section E 801.0 through Section E 806.0.
I have confirmed that the Installation Certificate(s) for the construction/installation identified on this form has been completed and is posted or made available with the permit(s) issued for the building.

CMC § 103.2 Medium relevance — show source text
103.2 Liability . . . . . . . . . . . . . . . . . . . . . . 22

103.3 Applications and Permits . . . . . . . . 22

103.4 Right of Entry . . . . . . . . . . . . . . . . . 22

104.0 Permits . . . . . . . . . . . . . . . . . . . . . . 22

104.1 Permits Required . . . . . . . . . . . . . . 22

104.2 Exempt Work . . . . . . . . . . . . . . . . . 22

104.3 Application for Permit . . . . . . . . . . . 22

104.4 Permit Issuance . . . . . . . . . . . . . . . 23

104.5 Fees . . . . . . . . . . . . . . . . . . . . . . . . 24

105.0 Inspections and Testing . . . . . . . . . 24

105.1 General. . . . . . . . . . . . . . . . . . . . . . 24

105.2 Required Inspections . . . . . . . . . . . 24

105.3 Testing of Systems . . . . . . . . . . . . . 25

105.4 Connection to Service Utilities . . . . 25

106.0 Violations and Penalties . . . . . . . . . 25

106.1 General. . . . . . . . . . . . . . . . . . . . . . 25

106.2 Notices of Correction or Violation . . 25

106.3 Penalties. . . . . . . . . . . . . . . . . . . . . 26

106.4 Stop Orders . . . . . . . . . . . . . . . . . . 26

106.5 Authority to Disconnect Utilities in Emergencies. . . . . . . . . . . . . . . . 26

106.6 Authority to Condemn. . . . . . . . . . . 26

107.0 Board of Appeals . . . . . . . . . . . . . . 26

107.1 General. . . . . . . . . . . . . . . . . . . . . . 26

107.2 Limitations of Authority . . . . . . . . . . 26

Table 104.5 Mechanical Permit Fees . . . . . . . . . 27

CHAPTER 2 DEFINITIONS. . . . . . . . . . . . . . . . . 29

201.0 General. . . . . . . . . . . . . . . . . . . . . . 31

201.1 Applicability. . . . . . . . . . . . . . . . . . . 31

202.0 Definition of Terms . . . . . . . . . . . . . 31

202.1 General. . . . . . . . . . . . . . . . . . . . . . 31

xxviii

CHAPTER 3 GENERAL REGULATIONS. . . . . . 49

301.0 General. . . . . . . . . . . . . . . . . . . . . . 51
CMC § 103.2 Medium relevance — show source text
In accordance with the prescribed procedures and with the approval of the appointing authority, the Authority Having Jurisdiction shall be permitted to appoint such number of technical officers, inspectors, and other employees as shall be authorized from time to time. The Authority Having Jurisdiction shall be permitted to deputize such inspectors or employees as necessary to carry out the functions of the code enforcement agency.

The Authority Having Jurisdiction shall be permitted to request the assistance and cooperation of other officials of this jurisdiction so far as required in the discharge of the duties required by this code or other pertinent law or ordi nance.

103.2 Liability. The Authority Having Jurisdiction charged with the enforcement of this code, acting in good faith and without malice in the discharge of the Authority Having Jurisdiction’s duties, shall not thereby be rendered personally liable for damage that accrues to persons or property as a result of an act or by reason of an act or omission in the discharge of such duties. A suit brought against the Authority Having Jurisdiction or employee because of such act or omission performed in the enforcement of provisions of this code shall be defended by legal counsel provided by this jurisdiction until final termination of such proceedings.

103.3 Applications and Permits. The Authority Having Jurisdiction shall be permitted to require the submission of plans, specifications, drawings, and such other information in accordance with the Authority Having Jurisdiction, prior to the commencement of, and at a time during the progress of, work regulated by this code.

The issuance of a permit upon construction documents shall not prevent the Authority Having Jurisdiction from thereafter requiring the correction of errors in said construction documents or from preventing construction operations being carried on thereunder where in violation of this code or of other pertinent ordinance or from revoking a certificate of approval where issued in error.

103.3.1 Licensing. Provision for licensing shall be determined by the Authority Having Jurisdiction. 103.4 Right of Entry. Where it is necessary to make an inspection to enforce the provisions of this code, or where the Authority Having Jurisdiction has reasonable cause to believe that there exists in a building or upon a premises a condition or violation of this code that makes the building or premises

unsafe, insanitary, dangerous, or hazardous, the Authority Having Jurisdiction shall be permitted to enter the building or premises at reasonable times to inspect or to perform the duties imposed upon the Authority Having Jurisdiction by this code, provided that where such building or premises is occupied, the Authority Having Jurisdiction shall present credentials to the occupant and request entry. Where such building or premises is unoccupied, the Authority Having Jurisdiction shall first make a reasonable effort to locate the owner or other person having charge or control of the building or premises and request entry. Where entry is refused, the Authority Having Jurisdiction has recourse to every remedy provided by law to secure entry.

Where the Authority Having Jurisdiction shall have first obtained an inspection warrant or other remedy provided by law to secure entry, no owner, occupant, or person having charge, care or control of a building or premises shall fail or neglect, after a request is made as herein provided, to promptly permit entry herein by the Authority Having Jurisdiction for the purpose of inspection and examination pursuant to this code.

104.0 Permits.
CMC § 104.4.6 Medium relevance — show source text
104.4.6 Retention of Plans. One set of approved construction documents and computations shall be retained by the Authority Having Jurisdiction until final approval of the work is covered therein.

One set of approved construction documents, computations, and manufacturer’s installation instructions shall be returned to the applicant, and said set shall be kept on the site of the building or work at times during which the work authorized thereby is in progress.

104.5 Fees. Fees shall be assessed in accordance with the provisions of this section and as set forth in the fee schedule, Table 104.5. The fees are to be determined and adopted by this jurisdiction. 104.5.1 Work Commencing Before Permit Issuance. Where work for which a permit is required by this code has been commenced without first obtaining said permit, a special investigation shall be made before a permit is issued for such work. 104.5.2 Investigation Fees. An investigation fee, in addition to the permit fee, shall be collected whether or not a permit is then or subsequently issued. The investigation fee shall be equal to the amount of the permit fee

that is required by this code if a permit were to be issued. The payment of such investigation fee shall not exempt a person from compliance with other provisions of this code, nor from a penalty prescribed by law. 104.5.3 Fee Refunds. The Authority Having Jurisdiction shall be permitted to authorize the refunding of a fee as follows:

(1) The amount paid hereunder that was erroneously paid or collected.

(2) Refunding of not more than a percentage, as determined by this jurisdiction where no work has been done under a permit issued in accordance with this code.

The Authority Having Jurisdiction shall not authorize refunding of a fee paid except upon written application filed by the original permittee not to exceed 180 days after the date of fee payment.

105.0 Inspections and Testing. 105.1 General. Mechanical systems for which a permit is required by this code shall be inspected by the Authority Having Jurisdiction.

No mechanical system or portion thereof shall be covered, concealed, or put into use until inspected and approved as prescribed in this code. Neither the Authority Having Jurisdiction nor the jurisdiction shall be liable for expense entailed in the removal or replacement of material required to permit inspection. Mechanical systems regulated by this code shall not be connected to the energy fuel supply lines until authorized by the Authority Having Jurisdiction.

105.2 Required Inspections. New mechanical system work and such portions of existing systems as affected by new work, or changes, shall be inspected by the Authority Having Jurisdiction to ensure compliance with the requirements of this code and to ensure that the installation and construction of the mechanical system are in accordance with approved plans. The Authority Having Jurisdiction shall make the following inspections and other such inspections as necessary. The permittee or the permittee’s authorized agent shall be responsible for the scheduling of such inspections as follows:

(1) Underground inspection shall be made after trenches or ditches are excavated and bedded, piping installed, and before backfill is put in place.

(2) Rough-in inspection shall be made prior to the installation of wall or ceiling membranes.

(3) Final inspection shall be made upon completion of the installation.

CMC § 801.0 Medium relevance — show source text

494 2025 CALIFORNIA MECHANICAL CODE

APPENDIX E

CERTIFICATE OF ACCEPTANCE MECH-2A	Col2
Outdoor Air Acceptance (Page 3 of 3)	Outdoor Air Acceptance (Page 3 of 3)
Project Name/Address:	Project Name/Address:
System Name or Identification/Tag:	System Location or Area Served:

C.	PASS/FAIL Evaluation (check one):
	PASS: All Construction Inspection responses are complete and Testing Calculations & Results responses are posi- tive (Y – yes).
	FAIL: Any Construction Inspection responses are incomplete_OR_ there is one or more negative (N – no) responses in Testing Calculations & Results section. Provide explanation below. Use and attach additional pages if necessary.

2025 CALIFORNIA MECHANICAL CODE 495

APPENDIX E

CERTIFICATE OF ACCEPTANCE MECH-3A	Col2
Constant Volume Single Zone Unitary Air Conditioner and Heat Pump Systems (Page 1 of 3)	Constant Volume Single Zone Unitary Air Conditioner and Heat Pump Systems (Page 1 of 3)
Project Name/Address:	Project Name/Address:
System Name or Identification/Tag:	System Location or Area Served:

Enforcement Agency:	Permit Number:
Note: Submit one Certificate of Acceptance for each system that must demonstrate compliance.	Enforcement Agency Use: Checked by/Date

FIELD TECHNICIAN’S DECLARATION STATEMENT

I certify under penalty of perjury the information provided on this form is true and correct.
I am the person who performed the acceptance requirements verification reported on this Certificate of Acceptance (Field Technician).

• I certify that the construction/installation identified on this form complies with the acceptance requirements indicated in the plans and specifications approved by the enforcement agency, and conforms to the applicable acceptance requirements and procedures specified in Section E 801.0 through Section E 806.0. • I have confirmed that the Installation Certificate(s) for the construction/installation identified on this form has been completed and is posted or made available with the building permit(s) issued for the building.	Col2	Col3
Company Name:	Company Name:	Company Name:
Field Technician’s Name:	Field Technician’s Name:	Field Technician’s Signature:
	Date Signed:	Position with Company (Title):

RESPONSIBLE PERSON’S DECLARATION STATEMENT

I certify under penalty of perjury that I am the Field Technician, or the Field Technician is acting on my behalf as my employee or my agent and I have reviewed the information provided on this form.
I am a licensed contractor or registered design professional who is eligible per the requirements of the Authority Having Jurisdiction to take responsibility for the scope of work specified on this document and attest to the declarations in this statement (responsible person).

CMC § 801.0 Medium relevance — show source text

I certify that the information provided on this form substantiates that the construction/installation identified on this form complies with the acceptance requirements indicated in the plans and specifications approved by the enforcement agency, and conforms to the applicable acceptance requirements and procedures specified in Section E 801.0 through Section E 806.0.
I have confirmed that the Installation Certificate(s) for the construction/installation identified on this form has been completed and is posted or made available with the permit(s) issued for the building.
I will ensure that a completed, signed copy of this Certificate of Acceptance shall be posted, or made available with the building permit(s) issued for the building, and made available to the enforcement agency for all applicable inspections. I understand that a signed copy of this Certificate of Acceptance is required to be included with the documentation the builder

provides to the building owner at occupancy.	Col2	Col3	Col4
Company Name:	Company Name:	Company Name:	Phone:
Responsible Person’s Name:	Responsible Person’s Name:	Responsible Person’s Signature:	Responsible Person’s Signature:
License:	Date Signed:	Position With Company (Title):	Position With Company (Title):

2025 CALIFORNIA MECHANICAL CODE 505

APPENDIX E

CERTIFICATE OF ACCEPTANCE MECH-6A	Col2
Demand Control Ventilation Systems Acceptance (Page 2 of 3)	Demand Control Ventilation Systems Acceptance (Page 2 of 3)
Project Name/Address:	Project Name/Address:
System Name or Identification/Tag:	System Location or Area Served:

Verify that systems required to employ demand controlled ventilation can vary outside ventilation flow rates based on Intent: maintaining interior carbon dioxide (CO 2 ) concentration setpoints.

Construction Inspection

Instrumentation to perform test includes, but not limited to: a. Calibrated handheld CO 2 analyzer. b. Manufacturer’s calibration kit. c. Calibrated CO 2 /air mixtures.
Installation.  The sensor is located in the high density space between 3 feet and 6 feet above the floor or at the anticipated level of the occupants heads.
Documentation of all carbon dioxide control sensors includes (check one of the following): a. Calibration method.  Factory-calibration certificate (certificate must be attached).  Field calibrated. b. Sensor accuracy.  Certified by manufacturer to be no more than +/- 75 ppm calibration certificate must be attached.

|A.

CMC § 801.0 Medium relevance — show source text

I am a licensed contractor or registered design professional who is eligible per the requirements of the Authority Having Jurisdiction to take responsibility for the scope of work specified on this document and attest to the declarations in this statement (responsible person).
I certify that the information provided on this form substantiates that the construction/installation identified on this form complies with the acceptance requirements indicated in the plans and specifications approved by the enforcement agency, and conforms to the applicable acceptance requirements and procedures specified in Section E 801.0 through Section E 806.0.
I have confirmed that the Installation Certificate(s) for the construction/installation identified on this form has been completed and is posted or made available with the permit(s) issued for the building.
I will ensure that a completed, signed copy of this Certificate of Acceptance shall be posted, or made available with the building permit(s) issued for the building, and made available to the enforcement agency for all applicable inspections. I understand that a signed copy of this Certificate of Acceptance is required to be included with the documentation the builder

provides to the building owner at occupancy.	Col2	Col3	Col4
Company Name:	Company Name:	Company Name:	Phone:
Responsible Person’s Name:	Responsible Person’s Name:	Responsible Person’s Signature:	Responsible Person’s Signature:
License:	Date Signed:	Position With Company (Title):	Position With Company (Title):

2025 CALIFORNIA MECHANICAL CODE 529

APPENDIX E

CERTIFICATE OF ACCEPTANCE MECH-15A	Col2
Thermal Energy Storage (TES) System Acceptance (Page 2 of 3)	Thermal Energy Storage (TES) System Acceptance (Page 2 of 3)
Project Name/Address:	Project Name/Address:
System Name or Identification/Tag:	System Location or Area Served:

Intent: Verify proper operation of distributed energy storage DX systems.

Construction Inspection

Instrumentation to perform test includes, but not limited to: a. No special instrumentation is required for the acceptance tests.

A. Certificate of Compliance Information	Col2	Col3	Col4	Col5	Col6
The following Certificate of Compliance information for both the chiller and the storage tank shall be provided on the plans to document the key TES System parameters and allow plan check comparison to the inputs used in the DOE-2 simulation. DOE-2 keywords are shown in ALL CAPITALS in parentheses.	The following Certificate of Compliance information for both the chiller and the storage tank shall be provided on the plans to document the key TES System parameters and allow plan check comparison to the inputs used in the DOE-2 simulation. DOE-2 keywords are shown in ALL CAPITALS in parentheses.	The following Certificate of Compliance information for both the chiller and the storage tank shall be provided on the plans to document the key TES System parameters and allow plan check comparison to the inputs used in the DOE-2 simulation. _DOE-2 keywords are shown in ALL CAPITALS in parentheses.

CMC § 801.0 Medium relevance — show source text

2025 CALIFORNIA MECHANICAL CODE 503

APPENDIX E

CERTIFICATE OF ACCEPTANCE MECH-5A	Col2
Air Economizer Controls Acceptance (Page 3 of 3)	Air Economizer Controls Acceptance (Page 3 of 3)
Project Name/Address:	Project Name/Address:
System Name or Identification/Tag:	System Location or Area Served:

C.	PASS/FAIL Evaluation (check one):
	PASS: AllConstruction Inspection responses are complete andTesting Results responses are “Pass.”
	FAIL: AnyConstruction Inspection responses are incomplete_OR_ there is one or more “Fail” responses inTesting Results section. Provide explanation below. Use and attach additional pages if necessary.

504 2025 CALIFORNIA MECHANICAL CODE

APPENDIX E

CERTIFICATE OF ACCEPTANCE MECH-6A	Col2
Demand Control Ventilation Systems Acceptance (Page 1 of 3)	Demand Control Ventilation Systems Acceptance (Page 1 of 3)
Project Name/Address:	Project Name/Address:
System Name or Identification/Tag:	System Location or Area Served:

Enforcement Agency:	Permit Number:
Note: Submit one Certificate of Acceptance for each system that must demonstrate compliance.	Enforcement Agency Use: Checked by/Date

FIELD TECHNICIAN’S DECLARATION STATEMENT

I certify under penalty of perjury the information provided on this form is true and correct.
I am the person who performed the acceptance requirements verification reported on this Certificate of Acceptance (Field Technician).

• I certify that the construction/installation identified on this form complies with the acceptance requirements indicated in the plans and specifications approved by the enforcement agency, and conforms to the applicable acceptance requirements and procedures specified in Section E 801.0 through Section E 806.0. • I have confirmed that the Installation Certificate(s) for the construction/installation identified on this form has been completed and is posted or made available with the building permit(s) issued for the building.	Col2	Col3
Company Name:	Company Name:	Company Name:
Field Technician’s Name:	Field Technician’s Name:	Field Technician’s Signature:
	Date Signed:	Position with Company (Title):

Inspections, Certificates & Enforcement

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