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// CODE SNIPPET

701.4 Crawl Space and Attic Space

NYC Mechanical Code 2014 > 7 Combustion, Ventilation, and Dilution Air > 701 General > 701.4 Crawl Space and Attic Space
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For the purposes of this chapter, an opening to a naturally ventilated crawl space or attic space shall be considered equivalent to an opening to the outdoors.

701.4.1 Crawl Space

Where lower combustion air openings connect with crawl spaces, such spaces shall have unobstructed openings to the outdoors at least twice that required for the combustion air openings. The height of the crawl space shall comply with the requirements of the New York City Building Code and shall be without obstruction to the free flow of air.

701.4.2 Attic Space

Where combustion air is obtained from an attic area, the attic ventilating openings shall not be subject to ice or snow blockage, and the attic shall have not less than 30 inches (762 mm) vertical clear height at its maximum point. Attic ventilation openings shall be sufficient to provide the required volume of combustion air and the attic ventilation required by the New York City Building Code. The combustion air openings shall be provided with a sleeve of not less than 0.019 inch (0.48 mm) (No.26 Gage) galvanized steel or other approved material extending from the appliance enclosure to at least 6 inches (152 mm) above the top of the ceiling joists and insulation.

Related Code Sections


304.1.1 General Regulations, Crawl Space and Attic Space
For the purposes of this chapter, an opening to a naturally ventilated crawl space or attic space shall be considered equivalent to an opening ...
NYC Fuel Gas Code 2014 > 3 General Regulations > 304 Combustion, Ventilation and Dilution Air > 304.1 General > 304.1.1 Crawl Space and Attic Space
304.1.1 General Regulations, Crawl Space and Attic Space
For the purposes of this chapter, an opening to a naturally ventilated crawl space or attic space shall be considered equivalent to an opening ...
NYC Fuel Gas Code 2022 > 3 General Regulations > 304 Combustion, Ventilation and Dilution Air > 304.1 General > 304.1.1 Crawl Space and Attic Space
701.4 Combustion, Ventilation, and Dilution Air, Crawl Space and Attic Space
For the purposes of this chapter, an opening to a naturally ventilated crawl space or attic space shall be considered equivalent to an opening ...
NYC Mechanical Code 2014 > 7 Combustion, Ventilation, and Dilution Air > 701 General > 701.4 Crawl Space and Attic Space
701.4 Combustion Air, Crawl Space and Attic Space
For the purposes of this chapter, an opening to a naturally ventilated crawl space or attic space shall be considered equivalent to an opening ...
NYC Mechanical Code 2008 > 7 Combustion Air > 701 General > 701.4 Crawl Space and Attic Space
701.4 Combustion, Ventilation, and Dilution Air, Crawl Space and Attic Space
For the purposes of this chapter, an opening to a naturally ventilated crawl space or attic space shall be considered equivalent to an opening ...
NYC Mechanical Code 2022 > 7 Combustion, Ventilation, and Dilution Air > 701 General > 701.4 Crawl Space and Attic Space
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