AERCO Esteem Boiler with EZ-Set Controller - Manual (Page 20)

GF-135
Esteem 399 Low NOx Boiler Chapter 2
OMM-0089_0A
Installation, Operation & Maintenance Manual Combustion Air/Venting
3.2.1 Areas Likely to Contain Contaminating Products
Areas likely to contain potential contaminants are as follows:
• Dry cleaning / laundry areas and establishments
• Beauty salons
• Metal fabrication shops
• Swimming pools and health spas
• Refrigeration Repair shops
• Photo processing plants
• Auto body shops
• Plastic manufacturing plants
• Furniture refinishing areas and establishments
• New building construction - Remodeling areas
• Garages with workshops
3.3 VENTILATION AND COMBUSTION AIR REQUIREMENTS - DIRECT
VENT
A Direct Vent appliance uses uncontaminated outdoor air (piped directly to the appliance) for
combustion.
For Direct Vent installations, involving only the Esteem boiler, in which the minimum service
clearances are maintained (see Recommended Clearances, section 2.4), no ventilation
openings are required.
For Direct Vent, zero clearance installations involving only the Esteem boiler, the space /
enclosure must have two openings for ventilation. The openings must be sized to provide 1
square inch of free area per 1,000 BTUH of boiler input
. The openings must be placed 12
inches from the top of the space and 12 inches from the floor of the space.
For installations where the Esteem 399 Low NOx shares the space with air movers (exhaust
fan, clothes dryers, fireplaces, etc.) and other combustion equipment (gas or oil) the space must
be provided with adequate air openings to provide ventilation and combustion air to all the
equipment. Sizing of the ventilation / combustion air openings must comply with the National
Fuel Gas Code NFPA 54, ANSI Z223.1 for installations in the U.S. or CSA B149.1 and B149.2
for installations in Canada.
Page 20 of 188 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0089_0A
MC1 06/19/14 Ph.: 800-526-0288