Return
• RETURN AIR TEMPERATURE MAINTAINED BETWEEN 55°F (13°C) AND 80°F (27°C)
The return ductwork is be installed in accordance with the National Fuel Gas Code 10.3.7.3 and
10.3.7.4. All Comfort Pack units to date are approved for an open bottom return so long as the
unit is installed in accordance with National Fuel Gas Code 10.3.7.3 and 10.3.7.4 as well as local
building and fire codes. If the unit is installed in a utility closet, it is recommended that louvers be in
the door, to allow living space return air. The (DF) slotted filter door option is also recommended
(but not necessary) when using an open return. This alleviates the requirement for a ducted return
and maintains the owner’s warranty. Please check with your code inspector if the DF option is right
for your application.
Proper balance and sealing of the duct system improves the efficiency of the heating and air
conditioning system and improves the indoor air quality of the home by reducing the amount of
airborne pollutants that enter homes from spaces where the ductwork and / or equipment is located.
The manufacturer and the U.S. Environmental Protection Agency’s Energy Star Program recommend
that central duct systems be checked by a qualified contractor for proper balance and sealing.
Installation/Instruction Manual for Architects & Engineers
22.
*example shown has a ducted return
