Technical information

11
PRODUCT DESIGN
Counterflow Filters
Cabinet Width
Filter Area
(in
2
)
Qty
Filter Size
(in)
Dimension "A"
(in)
16 1/2 14.2
20 1/2 13.0
24 1/2 11.3
16 1/2 19.7
20 1/2 18.8
24 1/2 17.7
16 1/2 25.0
20 1/2 24.3
24 1/2 23.4
800 2 20 X 20 X 1
1000 2 25 X 20 X 1
Counterflow Top Return
600 2 15 X 20 X 1
"A"
Min
Return Air
Optional
Access
Door
This furnace has provisions for the installation of return air filters at the counterflow top 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.
Disposable Minimum Filter Area (in
2
)
[Based on a 300 ft/min filter face velocity]
Permanent Minimum Filter Area (in
2
)
[Based on 600 ft/min filter face velocity]
*Minimum filter area dictated by heating airflow requirement. *Minimum filter area dictated by heating airflow requirement.
600 800 1000 1200 1400 1600 2000
045__30 376* 384 480 576 --- --- ---
070__30 --- 564* 564* 564* 672 --- ---
070__40 --- --- 564* 564* 672 768 ---
090__40 --- --- 752* 752* 752* 768 ---
090__50 --- --- --- 752* 752* 768 960
115__50 --- --- --- 940* 940* 940* 960
Cooling Airflow Requirement
(CFM)
GCCA___BX__
Model
(Input__Airflow)
600 800 1000 1200 1400 1600 2000
045__30 188* 192 240 288 --- --- ---
070__30 --- 282* 282* 282* 336 --- ---
070__40 --- --- 260* 260* 336 384 ---
090__40 --- --- 376* 376* 376* 384 ---
090__50 --- --- --- 376* 376* 384 480
115__50 --- --- --- 470* 470* 470* 480
Cooling Airflow Requirement
(CFM)
GCCA___BX__
Model
(Input__Airflow)