AERCO Esteem Boiler with EZ-Set Controller - Manual (Page 23)

GF-135
Esteem 399 Low NOx Boiler Chapter 2
OMM-0089_0A
Installation, Operation & Maintenance Manual Combustion Air/Venting
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.
Page 23 of 188 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0089_0A
MC1 06/19/14 Ph.: 800-526-0288