California Energy Code
(as it pertains to masonry fireplaces)
Energy Efficiency Standards for
Residential and Non Residential Buildings
California Energy Commission
Subchapter 7 (Section 150):
(e) Installation of Fireplaces, Decorative Gas Appliances, and Gas Logs
1. If a masonry or factory-built fireplace is installed, it shall have the following:
A. Closable metal or glass doors covering the entire opening of the firebox;
2. Continuous burning pilot lights and the use of indoor air for cooling a fire jacket, when that indoor air is vented to the outside of the building, are prohibited.
B. A combustion air intake to draw air from the outside of the building directly into the firebox, which is at least 6-square inches in area and is equipped with a readily accessible, operable, and tight-fitting damper or combustion air control device; and
EXCEPTION to Section 150(e)1.B.: An outside combustion air intake is not required if the fireplace will be installed over concrete slab flooring and the fireplace will not be located on an exterior wall.
C. A flue damper with a readily accessible control.
EXCEPTION to Section 150(e)1.C.: When a gas log, log lighter, or decorative gas appliance is installed in a fireplace, the flue damper shall be blocked open if required by the manufacturer's installation instructions or the State Mechanical Code.
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