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PRODUCT DESIGN
Thermostats:
ComfortNet™ CTK01A* Thermostat Kit
Filters:
Filters are required with this furnace and must be provided by the installer. The filters used must comply with UL900 or
CAN/ULCS111 standards. Installing this furnace without filters will void the unit warranty
Upflow Filters
Return air filters may be installated at the furnace side and/or bottom return openings. The furnace bottom return opening
and side openings will accommodate the following filter sizes depending on cabinet size:
Refer to Minimum Filter Area tables to determine filter area requirement. NOTE: Filters can also be installed elsewhere in
the duct system such as a central return.
Disposable Minimum Filter Area (in
2
)
[Based on a 300 ft/min filter face velocity]
*Minimum filter area dictated by heating airflow requirement.
Cabinet
Width
(in.)
Nominal
Filter Size
(in.)
Approx.
Flow Area
(in
2
)
Cabinet
Width
(in.)
Nominal
Filter Size
(in.)
Approx.
Flow Area
(in
2
)
All 16 x 25 x 1 400 17-1/2 14 x 25 x 1 350
21 16 x 25 x 1 400
24-1/2 20 x 25 x 1 500
Side Return Opening(s) Bottom Return Opening
600 800 1000 1200 1400 1600 1800 2000
0453__X* 415* 415* 480 576 --- --- --- ---
0704__X* --- --- 636* 636* 672 768 --- ---
0905__X* --- --- --- 826* 826* 826* 864 960
1155__X* --- --- --- 875* 875* 875* 875* 960
600 800 1000 1200 1400 1600 1800 2000
0704__X*
0714__X*
--- --- 634* 634* 672 768 --- ---
0905__X*
0915__X*
--- --- --- 819* 819* 819* 864 960
1155__X* --- --- --- 860* 860* 860* 864 960
Input__Airflow
UPFLOW
COOLING AIRFLOW REQUIREMENT (CFM)
COUNTERFLOW
COOLING AIRFLOW REQUIREMENT (CFM)
Input
Airflow