1217.11 Radiant Heating and Cooling Panels — 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) § 1217.11 · Effective January 1, 2026 · Official source: Building Standards Commission
Radiant heating and cooling panels shall be installed in accordance with the manufacturer’s installation instructions.
1217.11.1 Electric Heating Panel Systems. Clearances for electric heating panels or between outlets, junction boxes, mounting luminaries, ventilating, or other openings shall comply with the California Electrical Code .
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1217.11.2 Radiant Wall and Ceiling Panels. Radiant panels attached to wood, steel, masonry, or concrete framing members shall be fastened by means of anchors, bolts, or approved screws of sufficient size and anchorage to support the loads applied. Panels shall be installed with corrosion-resistant fasteners. Piping systems shall be designed for thermal expansion to prevent the load being transmitted to the panel. 1217.11.2.1 Insulation. Where a radiant plate wall system with insulation is installed with in an exterior wall, the insulating material shall have an R-value of 150 percent of the normal exterior wall, and a vapor barrier shall be installed between the insulation and the furring strips. 1217.11.2.2 Maximum Surface Temperatures. Surface temperatures shall not exceed the following for space heating applications:
(1) 100°F (38°C) for a ceiling height of 8 feet (2438 mm)
(2) 110°F (43°C) for a ceiling height of at least 9 feet (2743 mm)
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