13
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
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.
Disposable Minimum Filter Area (in
2
)
[
Based on a 300 ft/min filter face velocity]
*Minimum filter area dictated by heating airflow requirement.
600
800
1000
1200
1400
1600
2000
0603__XA
---
---
564*
564*
672
768
0805__XA
---
---
---
752*
752*
768
960
1005__XA
1155__XA
---
---
---
940*
940*
940*
960
600
800
1000
1200
1400
1600
2000
0604__XA
---
---
641*
641*
672
768
---
0805__XA
1005__XA
---
---
---
854*
854*
854*
960
In
p
u
t
Ai
rf
lo
w
UPFLOW
COOLING AIRFLOW REQUIREMENT (CFM)
COUNTERFLOW
COOLING AIRFLOW REQUIREMENT (CFM)
In
p
u
t
Ai
rf
lo
w
