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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.
FURNACE INPUT
FILTER SIZE
TYPE
45M
160 in
2
permanent
70M
241 in
2
permanent
90M
320 in
2
permanent
115M
400 in
2
permanent
140M
370 in
2
permanent
45M
320 in
2
disposable
70M
483 in
2
disposable
90M
640 in
2
disposable
115M
800 in
2
disposable
140M
738 in
2
disposable
PERMANENT NOMINAL 600 F.M. FACE VELOCITY
DISPOSABLE NOMINAL 300 F.M. FACE VELOCITY
MINIMUM FILTER SIZES
Cabinet
W idth
(in.)
Nominal
Filter Size
(in.)
Approx.
Flow Area
(in
2
)
Cabinet
W idth
(in.)
Nom inal
Filter Size
(in.)
Approx.
Flow Area
(in
2
)
All
16 x 25 x 1
400
14
12 x 25 x 1
300
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 Re turn Ope ning(s)
Bottom Re turn Ope ning
