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NYC Fuel Gas Code

§ 618.2 — § 618.2

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What is NYC FGC § 618.2?

Quick Answer

This section establishes the minimum unobstructed total area requirements for outdoor and return air ducts for forced-air warm-air furnaces, specifying 2 square inches for each 1,000 Btu/h output rating capacity. The section also refers to the furnace manufacturer's instructions for additional specifications. Applies to building owners using forced-air warm-air furnaces.

General informational summary. Not legal advice for your situation. Consult an attorney before acting on any specific matter.

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618.2 Forced-air furnaces.

FGC § 618.2

The minimum unobstructed total area of outdoor and return air ducts or openings to a forced-air warm-air furnace shall be not less than 2 square inches (1290.32 mm 2 ) for each 1,000 Btu/h (4402 mm 2 /W) output rating capacity of the furnace and not less than that specified in the furnace manufacturer's instructions. The minimum unobstructed total area of supply ducts from a forced-air warm-air furnace shall be not less than 2 square inches (1290.32 mm 2 ) for each 1,000 Btu/h (4402 mm 2 /W) output rating capacity of the furnace and not less than that specified in the furnace manufacturer's instructions. Exception: The total area of supply air ducts and outdoor and return air ducts shall not be required to be larger than the minimum size required by the furnace manufacturer's instructions.

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