518.1 General — 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) § 518.1 · Effective January 1, 2026 · Official source: Building Standards Commission
Downdraft appliance ventilation system containing or for use with appliances used in processes pro ducing smoke or grease-laden vapors shall be equipped with components complying with the following:
(1) The clearance requirements of Section 507.4 through Section 507.4.3.3.
(2) The primary collection means designed for collecting cooking vapors and residues complying with the requirements of Section 508.0.
(3) Grease removal devices complying with Section 509.0.
(4) Special-purpose filters as listed in accordance with UL 1046.
(5) Exhaust ducts complying with Section 510.0.
(6) The air movement requirements of Section 511.2.1 and Section 511.2.2.
(7) Auxiliary equipment (such as particulate and odor removal devices) complying with Section 512.0.
(8) Fire-extinguishing equipment complying with the requirements of Section 513.0, and as specified in Section 518.3.
(9) The use and maintenance requirements of Section 514.0.
(10)The minimum safety requirements of Section 515.0. {NFPA 96:16.1.1}
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