509.14 Automatically Operated Vent Dampers — 2025 California Plumbing Code
California Plumbing Code (Title 24, Part 5) · 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 Plumbing Code (Title 24, Part 5) § 509.14 · Effective January 1, 2026 · Official source: Building Standards Commission
An automatically operated vent damper shall be listed. [NFPA 54:12.15]
509.14.1 Listing. Automatically operated vent dampers for oil fired appliances shall comply with UL 17. The automatic damper control shall comply with UL 378.
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