AERCO Esteem Boiler with EZ-Set Controller - Manual (Page 22)

GF-135
Esteem 399 Low NOx Boiler Chapter 2
OMM-0089_0A
Installation, Operation & Maintenance Manual Combustion Air/Venting
3.5.1 INDOOR COMBUSTION AIR
Openings used to connect indoor spaces shall be sized and located in accordance with
Figure 3-1.
Figure 3-1: All Combustion Air from Adjacent Indoor Spaces Through Indoor
Combustion Openings
Each opening shall have a minimum free area of 1 sq. in./1000 Btu/hr. of the total input rating of
all gas utilization equipment in the space, but not less than 100 sq. inches. One opening shall
commence within 12 inches of the top, and one opening shall commence within 12 inches of the
bottom of the enclosure. The minimum dimension of air openings shall be not less than 3
inches.
Combining spaces in different stories. The volumes of spaces in different stories shall be
considered as communicating spaces where such spaces are connected by one or more
openings in doors or floors having a total minimum free area of 2 sq. in./1000 Btu/hr. of total
input rating of all gas utilization equipment.
Page 22 of 188 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0089_0A
MC1 06/19/14 Ph.: 800-526-0288