Alameda County Municipal Code Art. II California Mechanical Code, Amended Sections to 2025 California Mechanical…

1.1.7.3 Conflicts [BID]. {See CMC, and add the following.} When the requirements within the jurisdiction of this code conflict with the requirements of AC Chapters 15.08, 15.12, 15.20, and 15.24, a decision of the building official shall be required for resolution.

1.1.8 County amendments, additions or deletions [BID]. The County has exercised its authority to establish more restrictive and reasonably necessary differences to the provisions contained in this code pursuant to complying with Section 1.1.8.1. {Delete remaining sentences in this paragraph.}

The County modifications comply with Health and Safety Code Section 18941.5 for Building Standards Law and Health and Safety Code Section 17958 for State Housing Law. {Delete remainder of sentence.}

(Ord. No. 2025-72, Exh. B, 12-16-25)

101.1 Title [BID]. These regulations shall be known as the Mechanical Code of the County of Alameda, and will be referred to heroin as "this code."

103.0 through 103.4. {See CMC and AC Sections 15.08.020 through 15.08.150 for administrative provisions when applicable.}

104.1 Permits Required. {See CMC and AC Section 15.08.060.}

104.2 Exempt Work [BID]. {See CMC and AC Section 15.08.060 when applicable and add the following.}

(6) The replacement in dwelling units, when not part of a building remodel, of dishwashers, garbage disposals, ranges, ovens, cook tops, trash compactors, clothes washers, clothes dryers, and other similar equipment, provided that all of the following conditions are satisfied:

a) The replacement equipment is to be installed in the same location as the equipment being replaced.

b) The BTU input rating or the wattage of the replacement equipment is the same as or less than that of the equipment being replaced.

c) The electrical connection of the replacement equipment is to be to an existing circuit, installed under a previous electrical permit.

d) Any gas connection to the replacement equipment will not require the alteration of the gas line on the supply side of the shut-off valve.

e) Any water, waste, and/or vent connections to the replacement equipment will not require significant alterations to the building. All existing lines, pipes, and vents that are to be used in such connections were installed under previous plumbing or mechanical permits.

(Ord. No. 2025-72, Exh. B, 12-16-25)

801.1 Applicability [BID]. {See CMC, and the following subsection is added.}

801.1.1 Wood-burning Appliances. A wood-burning appliance installed in a building or structure shall be an approved wood-burning appliance as defined in this subsection.

An approved wood-burning appliance is one of the following:

1. Any wood heater that operates on wood pellets.

2. Any wood heater that meets the standards in Title 40, Part 60, Subpart AAA, Code of Federal Regulations as in effect at the time of heater installation and that is certified and labeled pursuant to those regulations.

3. A wood heater insert meeting the same standards as in 2. above.

4. A permanently-installed masonry or factory-built fireplace, as described in Section 2111 of the CBC, that is designed to be used with an air-to-fuel ratio greater than or equal to 35 to 1 and that has been certified by a testing laboratory, approved (certified) by the Environment Protection Agency (EPA), as emitting no more than 7.5 grams particulate per hour when tested using an EPA-approved protocol.

Exceptions:

1. Existing buildings undergoing remodel or renovation when the total cumulative costs of the planned work and of all improvements over the 5 years prior to the application date is estimated by the building official to be less than $50,000.00.

2. Existing wood-burning appliances being reconstructed, repaired, or modified when the cost of the said work is estimated by the building official to be less than $4,000.00.

3. Historical buildings or structures, as defined in CBC.

4. Gas-only fireplaces that do not burn wood are exempt from the provisions of this section. Gas fireplaces that are converted, to burn wood are not exempt from the provisions of this section.

(Ord. No. 2025-72, Exh. B, 12-16-25)