Chapter 10 — BOILERS AND PRESSURE VESSELS
1010.3 Steam-Heating Boilers, Hot Water Boilers, and Power Boilers — 2025 California Mechanical Code
California Mechanical Code (Title 24, Part 4) · 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 Mechanical Code (Title 24, Part 4) § 1010.3 · Effective January 1, 2026 · Official source: Building Standards Commission
Power Boilers. Steam-heating boilers and hot-water-heating boilers that exceed one of the following limits:
(1) 5 000 000 Btu/h input (1464 kW)
(2) 5000 pounds steam per hour (0.6299 kg/s) capacity
(3) 1000 square foot (92.9 m [2] ) heating surface
Power boilers that do not exceed one of the following limits:
(1) 5 000 000 Btu/h input (1464 kW)
(2) 5000 pounds steam per hour (0.6299 kg/s) capacity (3) 1000 square foot (92.9 m [2] ) heating surface
Boilers with manholes on top of the boiler, except those described in Section 1010.2 and Section 1010.4, shall have a clearance of not less than 3 feet (914 mm) from the top of the boiler to the ceiling.
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