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PRODUCT DESIGN
Thermostats:
NOTE: Complete lineup of thermostats can be found in the Thermostat Specification Sheets.
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.
This furnace has provisions for the installation of return air filters at the side and/or bottom return. The furnace will
accommodate the following filter sizes depending on cabinet size:
Cabinet
Width
(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.
COOLING AIRFLOW REQUIREMENT (CFM)
600
800
0453BXA*
388*
388*
0703BXA*
---
647*
0704CXA*
---
---
0904CXA*
---
---
0905DXA*
---
---
1155DXA*
---
---
*Minimum filter area dictated by heating airflow requirement.
Disposable Minimum Filter Area (in
[Based on a 300 ft/min filter face velocity]
10
Upflow Filters
SIDE RETURN
Approx.
Nominal
Flow Area
Filter Size
2
(in.)
(in
)
16 x 25 x 1
400
1000
1200
1400
1600
2000
480
576
---
---
---
647*
647*
672
---
---
583*
583*
672
768
---
863*
863*
863*
863*
---
---
777*
777*
777*
960
---
971*
971*
971*
971*
2
)
BOTTOM RETURN
Cabinet
Nominal
Width
Filter Size
(in.)
(in.)
17-1/2
14 x 25 x 1
21
16 x 25 x 1
24-1/2
20 x 25 x 1
(1) Flanges on bottom return must be unfolded
COOLING AIRFLOW REQUIREMENT (CFM)
600
800
0453BXA*
194*
194*
0703BXA*
---
324*
0704CXA*
---
---
0904CXA*
---
---
0905DXA*
---
---
1155DXA*
---
---
*Minimum filter area dictated by heating airflow requirement.
Permanent Minimum Filter Area (in
[Based on 600 ft/min filter face velocity]
(1)
Approx.
Flow Area
2
(in
)
350
400
500
1000
1200
1400
1600
2000
240
288
---
---
---
324*
324*
336
---
---
291*
291*
336
384
---
432*
432*
432*
432*
---
---
388*
388*
388*
480
---
486*
486*
486*
486*
2
)
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