Indoor air as the source of combustion air
Indoor air as the source of combustion air is acceptable in most
applications if the following guidelines are met:
All provisions for indoor combustion air must meet the
requirements for combustion air indicated in the National Fuel
Gas Code, ANSI Z223.1/NFPA 54 (latest edition), and/or any
applicable local codes.
If indoor combustion air is used, the air supply to the furnace
should not be exposed to the following substances:
Permanent wave solutions
Chlorinated waxes and cleaners
Chlorine-based swimming pool chemicals
Water softening chemicals
Deicing salts or chemicals
Cleaning solvents (such as perchloroethylene)
Printing inks, paint removers, varnishes, etc.
Cements and glues
Antistatic fabric softeners for clothes dryers
Masonry acid washing materials
Chlorinated laundry products
Furnace must be installed and serviced by a
Examples of a qualified person include:
licensed heating personnel,
authorized gas company personnel.
Read and follow all instructions provided for
installation, adjustment, service, alteration, or
Failure to follow these instructions can result in death,
explosion, fire, or carbon monoxide poisoning.
Excessive Weight Hazard
Use two or more people to move and install furnace.
Failure to do so can result in back or other injury.
This furnace is shipped in one package, completely assembled
and wired. The thermostat is shipped in a separate carton when
Check the unit rating plate to confirm specifications are as
Upon receipt of equipment, carefully inspect it for possible
shipping damage. Take special care to examine the unit
inside the carton if the carton is damaged.
If damage is found, it should be noted on the carrier's freight
bill. Damage claims should be filed with the carrier
immediately. Claims of shortages should be filed with the
seller within 5 days.
NOTE: If any damages are discovered and reported to the
carrier, do not install the unit as your claim may be denied.
Plan Vent System
Category I furnaces must be vented vertically or nearly vertically.
Common venting and multistory venting are permitted when
done in accordance with applicable codes, such as local and
The venting system should be designed in accordance with the
"FAN" columns in the venting tables in the latest editions of the
National Fuel Gas Code, ANSI Z223.1/ NFPA 54.
Consult local building codes for installation requirements.
The vent connector should be as short as possible with the
least number of elbows and angles to do the job.
It is recommended that a minimum of 26 gauge galvanized
flue pipe be used. Use of single-wall vent pipe for the vent
connector is permissible only in conditioned space. The vent
material used should be in accordance with the National Fuel
Gas Code, ANSI Z223.1/ NFPA 54 (latest edition) and local
codes. Fan-assisted combustion system Category I furnaces
shall not be vented into single wall metal vents.
NOTE: Use Doublewall Type B vent pipe through
unconditioned space such as attics and crawl spaces.
The vent connector must have an upward slope toward the
chimney on all horizontal runs of at least ¹⁄₄ in. per foot of
horizontal run and should be supported by a sheet metal
strap. The vent pipe connection must be secured to the
induced draft blower outlet.
A factory-built chimney must extend 3 ft above the highest
point where it passes through a roof of a building and at least
2 ft higher than any portion of a building within a horizontal
distance of 10 ft as shown.