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2111.14.5 Passageway.
The combustion air passageway shall be not less than 6 square inches (3870 mm
2
) and not more than 55 square inches (0.035 m
2
), except that combustion air systems for listed fireplaces or for fireplaces tested for emissions shall be constructed according to the fireplace manufacturer's instructions.
2111.14.6 Outlet.
The exterior air outlet is permitted to be located in the back or sides of the firebox chamber or within 24 inches (610 mm) of the firebox opening on or near the floor. The outlet shall be closable and designed to prevent burning material from dropping into concealed combustible spaces.
2112.1 Definition.
A masonry heater is a heating appliance constructed of concrete or solid masonry, hereinafter referred to as "masonry," which is designed to absorb and store heat from a solid fuel fire built in the firebox by routing the exhaust gases through internal heat exchange channels in which the flow path downstream of the firebox may include flow in a horizontal or downward direction before entering the chimney and which delivers heat by radiation from the masonry surface of the heater.
2112.2 Installation.
Masonry heaters may be installed only when their use is permitted by the New York City Air Pollution Control Code. When such use is permitted, such appliances shall be operated in compliance with the New York City Air Pollution Control Code. Masonry heaters shall also be installed in accordance with this section and comply with one of the following:
1. Masonry heaters shall comply with the requirements of ASTM E 1602.
2. Masonry heaters shall be listed and labeled in accordance with UL 1482 or EN 15250 and installed in accordance with the manufacturer's instructions.
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