GF-135
Esteem 399 Low NOx Boiler
Chapter 2
OMM-0089_0A
Installation, Operation & Maintenance Manual
Combustion Air/Venting
Page
23
of
188
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
OMM-0089_0A
MC1 06/19/14
Ph.: 800-526-0288
3.5.2 OUTDOOR COMBUSTION AIR
The minimum dimension of air openings for outdoor combustion air venting shall be not
less than 3 inches.
3.5.2.1 Option 1: One Permanent Opening to Outside
Openings used to supply combustion and ventilation air shall be sized and located in
accordance with the following:
•
One Permanent Opening Method. See Figure 3-2.
•
One permanent opening, commencing within 12 inches of the top of the enclosure,
shall be provided. The equipment shall have clearances of at least 1 inch from the
sides and 6 inches from the front of the appliance. The opening shall directly
communicate with the outdoors or shall communicate through a vertical or horizontal
duct to the outdoors or spaces that freely communicate with the outdoors and shall
have a minimum free area of the following:
Figure 3-2:
All Combustion Air from Outdoors Through One Permanent Air Opening
•
1 sq. in./3000 Btu/hr. of the total input rating of all equipment located in the enclosures,
and
•
Not less than the sum of the areas of all vent connectors in the space.
