10
PRODUCT DESIGN
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:
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.
Upflow Filters
Disposable Minimum Filter Area (in
2
)
[
Based on a 300 ft/min filter face velocity]
*Minimum filter area dictated by heating airflow requirement.
Permanent Minimum Filter Area (in
2
)
[Based on 600 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
BOTTOM RETURN
(1)
SIDE RETURN
(1) Flanges on bottom return must be unfolded
Thermostats:
NOTE: Complete lineup of thermostats can be found in the Thermostat Specification Sheets.
600
800
1000
1200
1400
1600
1800
2000
0453BXA*
388*
388*
480
576
---
---
---
---
0703BXA*
---
647*
647*
647*
672
---
---
---
0704CXA*
---
---
583*
583*
672
768
---
---
0904CXA*
---
---
863*
863*
863*
863*
---
---
0905CXA*
---
---
863*
863*
863*
863*
864
---
0905DXA*
---
---
---
777*
777*
777*
864
960
1155DXA*
---
---
---
971*
971*
971*
971*
971*
COOLING AIRFLOW REQUIREMENT (CFM)
Inpu
t_
_
A
ir
fl
ow
600
800
1000
1200
1400
1600
1800
2000
0453BXA*
194*
194*
240
288
---
---
---
---
0703BXA*
---
324*
324*
324*
336
---
---
---
0704CXA*
---
---
291*
291*
336
384
---
---
0904CXA*
---
---
432*
432*
432*
432*
---
---
0905CXA*
---
---
432*
432*
432*
432*
432*
---
0905DXA*
---
---
---
388*
388*
388*
432
480
1155DXA*
---
---
---
486*
486*
486*
486*
486*
Input
_
_
A
ir
fl
ow
COOLING AIRFLOW REQUIREMENT (CFM )
