603.6 Protection of Ducts — 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) § 603.6 · Effective January 1, 2026 · Official source: Building Standards Commission
Ducts installed in locations where they are exposed to mechanical damage by vehicles or from other causes shall be protected by approved barriers.
603.6.1 Weather Protection. Ducts installed on the exterior of the building shall be protected against the ele ments.
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