GF-135
Esteem 399 Low NOx Boiler
Chapter 2
OMM-0089_0A
Installation, Operation & Maintenance Manual
Combustion Air/Venting
Page
22
of
188
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
OMM-0089_0A
MC1 06/19/14
Ph.: 800-526-0288
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.
