12
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.
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
0453__X*
415*
415*
480
576
---
---
---
0704__X*
---
---
636*
636*
672
768
0905__X*
---
---
---
826*
826*
826*
960
1155__X*
---
---
---
875*
875*
875*
960
600
800
1000
1200
1400
1600
2000
0704__X*
---
---
634*
634*
672
768
---
0905__X*
---
---
---
819*
819*
819*
960
115__X*
---
---
---
860*
860*
860*
960
In
put
_
_
A
ir
fl
o
w
UP FLO W
CO OL ING AIRFLO W REQUIREM ENT (CFM )
COUNTERFLO W
CO OL ING AIRFLO W REQUIREM ENT (CFM )
In
put
Ai
rf
lo
w
Cabinet
W idth
(in.)
Nominal
Filter Size
(in.)
Approx.
Flow Area
(in
2
)
Cabinet
W idth
(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
Side Re turn Ope ning(s)
Bottom Re turn Ope ning
