925.4 Combustion and Ventilation Air — 2025 California Mechanical Code

California Mechanical Code (Title 24, Part 4) · 2025 edition · updated 2026-09-25 · California

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Italicized text is a California amendment to the model code, as printed in the official publication.

Cite as: 2025 California Mechanical Code (Title 24, Part 4) § 925.4 · Effective January 1, 2026 · Official source: Building Standards Commission

Where unvented

infrared heaters are used, natural or mechanical means shall be provided to supply and exhaust at least 4 ft [3] /min/1000 Btu/h (0.38 m [3] /min/kW) input of installed heaters. [NFPA 54:10.16.4.1]

925.4.1 Exhaust Openings. Exhaust openings for removing flue products shall be above the level of the heaters. [NFPA 54:10.16.4.2]

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▸Contents — California Mechanical Code (Title 24, Part 4)

California Mechanical Code (Title 24, Part 4)

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