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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
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:
Cabinet
W idth
(in.)
All
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.
12
Side Re turn Ope ning(s)
Approx.
Nominal
Flow Area
Filter Size
2
(in.)
(in
16 x 25 x 1
400
600
0453__X*
415*
0704__X*
---
0905__X*
---
1155__X*
---
600
0704__X*
---
0905__X*
---
115__X*
---
*Minimum filter area dictated by heating airflow requirement.
Disposable Minimum Filter Area (in
[Based on a 300 ft/min filter face velocity]
Upflow Filters
Cabinet
W idth
(in.)
)
17-1/2
21
24-1/2
UP FLOW
COOLING AIRFLOW REQUIREM ENT (CFM )
800
1000
1200
1400
415*
480
576
---
636*
636*
672
---
---
826*
826*
---
---
875*
875*
COUNTERFLOW
COOLING AIRFLOW REQUIREM ENT (CFM )
800
1000
1200
1400
---
634*
634*
672
---
---
819*
819*
---
---
860*
860*
Bottom Re turn Ope ning
Approx.
Nominal
Flow Area
Filter Size
(in.)
(in
14 x 25 x 1
350
16 x 25 x 1
400
20 x 25 x 1
500
1600
2000
---
---
---
768
826*
960
875*
960
1600
2000
768
---
819*
960
860*
960
2
)
2
)
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