1212.11 Air Removal Device or Air Vents — 2025 California Mechanical Code
California Mechanical Code (Title 24, Part 4) · 2025 edition · updated 2026-10-19 · California
CBSC: official editions, supplements and errata
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) § 1212.11 · Effective January 1, 2026 · Official source: Building Standards Commission
Isolation valves
shall be installed where air removal devices or automatic air
vents are utilized to permit cleaning, inspection, or repair without shutting the system down.
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