Chapter 9 — INSTALLATION OF SPECIFIC APPLIANCES
907.2 Installation — 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) § 907.2 · Effective January 1, 2026 · Official source: Building Standards Commission
Wall furnaces shall be installed in accor dance with the manufacturer’s installation instructions. Wall
furnaces installed in or attached to combustible material shall be listed for such installation. [NFPA 54:10.25.2.1]
907.2.1 Vented Wall Furnaces. Vented wall furnaces connected to a Type B-W gas vent system listed only for a single story shall be installed only in single-story buildings or the top story of multistory buildings. Vented wall furnaces connected to a Type B-W gas vent system listed for installation in multistory buildings shall be permitted to be installed in single-story or multistory buildings. Type B-W gas vents shall be attached directly to a solid header plate that serves as a firestop at that point and that
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204 2025 CALIFORNIA MECHANICAL CODE
INSTALLATION OF SPECIFIC APPLIANCES
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