Benchmark 1500 - 2000 Boilers
CHAPTER 2 – INSTALLATION
Page 32 of 182 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0097_0E
10/01/2015 Ph.: 800-526-0288 GF-142
For Massachusetts installations, the following companies provide vent systems which conform
to all applicable requirements for installations within the Commonwealth of Massachusetts.
Contact information is as follows:
Selkirk Corporation - Heatfab Division
130 Industrial Blvd.
Turners Falls, MA 01376
Phone: 1-800-772-0739
www.heat-fab.com
33Grove St.
Watertown, MA 02472
Phone: (617) 924-2840
http://www.watertownsupply.com/
1250 Massachusetts Ave.
Boston MA 02125-1689
Phone: (617) 288-0629
44 Riverdale Ave.
Newton, MA 02485
Phone: (617) 527-8178
2.12 COMBUSTION AIR
The AERCO Benchmark Boiler Venting and Combustion Air Guide, GF-2050 MUST be
consulted before any flue or inlet air venting is designed or installed. Air supply is a direct
requirement of ANSI 223.1, NFPA-54, CSA B149.1 and local codes. These codes should be
consulted before a permanent design is determined.
The combustion air must be free of chlorine, halogenated hydrocarbons or other chemicals that
can become hazardous when used in gas-fired equipment. Common sources of these
compounds are swimming pools, degreasing compounds, plastic processing, and refrigerants.
Whenever the environment contains these types of chemicals, combustion air MUST be
supplied from a clean area outdoors for the protection and longevity of the equipment and
warranty validation.
For combustion air supply from ducting, see section 2.13 below and consult the AERCO GF-
2050, Gas Fired Venting and Combustion Air Guide.
Air must be supplied to the unit(s) through two permanent openings. These two openings must
have a free area of not less than one square inch (6.5 cm
2
) for each 4000 BTUs (1.17 kW)
input for each unit. The free area must take into account restrictions such as louvers and bird
screens. For Canada installations, refer to the requirements specified in CSA B149.1-10,
sections 8.4.1 and 8.4.3.
2.13 DUCTED COMBUSTION AIR
For ducted combustion air installations, the air ductwork must then be attached directly to the air
inlet connection on the sheet metal enclosure.
In a ducted combustion air application, the combustion air ducting pressure losses must be
taken into account when calculating the total maximum allowable venting run. See the AERCO
Benchmark Venting and Combustion Air Guide, GF-2050. When using the unit in a ducted
combustion air configuration, the minimum diameter connection at the unit is:
• BMK 1500 – 6 inch (15.2 cm) diameter connection
• BMK 2000 – 8 inch (20.3 cm) diameter connection
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