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// CODE SNIPPET

703.1.3 Size of Horizontal Openings

NYC Mechanical Code 2008 > 7 Combustion Air > 703 Outdoor Air > 703.1 All Air From the Outdoors > 703.1.3 Size of Horizontal Openings
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The net free area of each opening, calculated in accordance with Section 709 and connected to the outdoors through a horizontal duct, shall be a minimum of 1 square inch per 2,000 Btu/h (1100 mm2/kW) of combined input rating of the fuel-burning appliances drawing combustion and dilution air from the room. The cross-sectional area of the duct shall be equal to or greater than the required size of the opening.

Related Code Sections


703.1.3 Combustion Air, Size of Horizontal Openings
The net free area of each opening, calculated in accordance with Section 709 and connected to the outdoors through a horizontal duct, shall ...
NYC Mechanical Code 2008 > 7 Combustion Air > 703 Outdoor Air > 703.1 All Air From the Outdoors > 703.1.3 Size of Horizontal Openings
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