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// CODE SNIPPET

Section 709 Louvers and Grills

2010 Mechanical Code of NY > 7 Combustion Air > 709 Louvers and Grills
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709.1 General

The required size of openings for combustion, ventilation and dilution air shall be based on the free area of each opening. Where the free area through a design of louver, grill or screen is known, it shall be used in calculating the size opening required to provide the free area specified. Where the design and free area of louvers, grills or screens is not known, it shall be assumed that wood louvers will have 25-percent free area and metal louvers, grills and screens will have 50-percent free area. Screens shall have a mesh size not smaller than 1/4 inch. Nonmotorized louvers and grills shall be fixed in the open position. Motorized louvers shall be interlocked with the equipment so that they are proven to be in the full open position, by use of a blade position switch, prior to burner ignition and during burner operation. Means shall be provided to prevent the burner from igniting if the louvers fail to open during burner start-up and to shut down the burner if the louvers close during operation.

Related Code Sections


304.10 General Regulations, Louvers and Grilles
through a design of louver, grille or screen is known, it shall be used in calculating the size opening required to provide the free area specified ...
Fuel Gas Code 2015 of New York State > 3 General Regulations > 304 (IFGS) Combustion, Ventilation and Dilution Air > 304.10 Louvers and Grilles
304.10 General Regulations, Louvers and Grilles
through a design of louver, grille or screen is known, it shall be used in calculating the size opening required to provide the free area specified ...
2010 Fuel Gas Code of NY > 3 General Regulations > 304 Combustion, Ventilation and Dilution Air > 304.10 Louvers and Grilles
304.10 General Regulations, Louvers and Grilles
through a design of louver, grille or screen is known, it shall be used in calculating the size opening required to provide the free area specified ...
2020 Fuel Gas Code of NYS > 3 General Regulations > 304 Combustion, Ventilation and Dilution Air > 304.10 Louvers and Grilles
304.4.1.2 General Regulations, Louvers and Grilles
area through a design of louver or grille is known, it shall be used in calculating the size opening required to provide the free area specified. If ...
2010 Mechanical Code of NY > 3 General Regulations > 304 Installation > 304.4 Hydrogen-Generating and Refueling Operations > 304.4.1 Natural Ventilation > 304.4.1.2 Louvers and Grilles
304.5.1.2 General Regulations, Louvers and Grilles
area through a design of louver or grille is known, it shall be used in calculating the size opening required to provide the free area specified. If ...
Mechanical Code 2015 of New York State > 3 General Regulations > 304 Installation > 304.5 Hydrogen-Generating and Refueling Operations > 304.5.1 Natural Ventilation > 304.5.1.2 Louvers and Grilles
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