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// CODE SNIPPET

Section 704 Combined Use of Indoor and Outdoor Air (Condition 1)

2010 Mechanical Code of NY > 7 Combustion Air > 704 Combined Use of Indoor and Outdoor Air (Condition 1)
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704.1 Combination of Air From Indoors and Outdoors

This section shall apply only to appliances located in confined spaces in buildings not of unusually tight construction. Where the volumes of rooms and spaces are combined for the purpose of providing indoor combustion air, such rooms and spaces shall communicate through permanent openings in compliance with Sections 702.3.1 and 702.3.2. The required combustion and dilution air shall be obtained by opening the room to the outdoors using a combination of indoor and outdoor air, prorated in accordance with Section 704.1.6. The ratio of interior spaces shall comply with Section 704.1.5. The number, location and ratios of openings connecting the space with the outdoor air shall comply with Sections 704.1.1 through 704.1.4.

704.1.1 Number and Location of Openings

At least two openings shall be provided, one within 1 foot (305 mm) of the ceiling of the room and one within 1 foot (305 mm) of the floor.

704.1.2 Ratio of Direct Openings

Where direct openings to the outdoors are provided in accordance with Section 703.1, the ratio of direct openings shall be the sum of the net free areas of both direct openings to the outdoors, divided by the sum of the required areas for both such openings as determined in accordance with Section 703.1.2.

704.1.3 Ratio of Horizontal Openings

Where openings connected to the outdoors through horizontal ducts are provided in accordance with Section 703.1, the ratio of horizontal openings shall be the sum of the net free areas of both such openings, divided by the sum of the required areas for both such openings as determined in accordance with Section 703.1.3.

704.1.4 Ratio of Vertical Openings

Where openings connected to the outdoors through vertical ducts are provided in accordance with Section 703.1, the ratio of vertical openings shall be the sum of the net free areas of both such openings, divided by the sum of the required areas for both such openings as determined in accordance with Section 703.1.4.

704.1.5 Ratio of Interior Spaces

The ratio of interior spaces shall be the available volume of all communicating spaces, divided by the required volume as determined in accordance with Sections 702.2 and 702.3.

704.1.6 Prorating of Indoor and Outdoor Air

In spaces that utilize a combination of indoor and outdoor air, the sum of the ratios of all direct openings, horizontal openings, vertical openings and interior spaces shall equal or exceed 1.

Related Code Sections


Section 704 Combustion Air, Combined Use of Indoor and Outdoor Air (Condition 1)
a combination of indoor and outdoor air, prorated in accordance with Section 704.1.6. The ratio of interior spaces shall comply with Section 704.1.5. The ...
2010 Mechanical Code of NY > 7 Combustion Air > 704 Combined Use of Indoor and Outdoor Air (Condition 1)
704.1.4 Combustion Air, Ratio of Vertical Openings
Where openings connected to the outdoors through vertical ducts are provided in accordance with Section 703.1, the ratio of vertical openings shall ...
2010 Mechanical Code of NY > 7 Combustion Air > 704 Combined Use of Indoor and Outdoor Air (Condition 1) > 704.1 Combination of Air From Indoors and Outdoors > 704.1.4 Ratio of Vertical Openings
704.1.5 Combustion Air, Ratio of Interior Spaces
The ratio of interior spaces shall be the available volume of all communicating spaces, divided by the required volume as determined in accordance ...
2010 Mechanical Code of NY > 7 Combustion Air > 704 Combined Use of Indoor and Outdoor Air (Condition 1) > 704.1 Combination of Air From Indoors and Outdoors > 704.1.5 Ratio of Interior Spaces
Section 705 Combustion Air, Combined Use of Indoor and Outdoor Air (Condition 2)
by a combined use of indoor and outdoor air shall be supplied through openings and ducts extending to the appliance room or to the vicinity of the appliance ...
2010 Mechanical Code of NY > 7 Combustion Air > 705 Combined Use of Indoor and Outdoor Air (Condition 2)
705.1 Combustion Air, General
by a combined use of indoor and outdoor air shall be supplied through openings and ducts extending to the appliance room or to the vicinity of the appliance ...
2010 Mechanical Code of NY > 7 Combustion Air > 705 Combined Use of Indoor and Outdoor Air (Condition 2) > 705.1 General
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