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Earlier editions: 20222019

Chapter 5 — EXHAUST SYSTEMS

505.10 Makeup Air — 2025 California Mechanical Code

California Mechanical Code (Title 24, Part 4) · 2025 edition · updated 2026-09-25 · 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) § 505.10 · Effective January 1, 2026 · Official source: Building Standards Commission

Makeup air shall be provided to replenish air exhausted by the ventilation system. Makeup air

102 2025 CALIFORNIA MECHANICAL CODE

EXHAUST SYSTEMS

intakes shall be located so as to avoid recirculation of con taminated air within enclosures.

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

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