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.
Upflow Filters
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:
SIDE RETURN
| Cabinet | Nominal | Approx. |
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| Width | Filter Size | Flow Area |
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| (in.) | (in.) | (in2) |
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| All | 16 x 25 x 1 | 400 |
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BOTTOM RETURN (1)
Cabinet | Nominal | Approx. |
Width | Filter Size | Flow Area |
(in.) | (in.) | (in2) |
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14 x 25 x 1 | 350 | |
21 | 16 x 25 x 1 | 400 |
20 x 25 x 1 | 500 |
(1) Flanges on bottom return must be unfolded
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.
Input__Airflow
| COOLING AIRFLOW REQUIREMENT (CFM) | ||||||
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| 600 | 800 | 1000 | 1200 | 1400 | 1600 | 2000 |
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0453BXA* | 388* | 388* | 480 | 576 | |||
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0703BXA* | 647* | 647* | 647* | 672 | |||
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0704CXA* | 583* | 583* | 672 | 768 | |||
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0904CXA* | 863* | 863* | 863* | 863* | |||
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0905DXA* | 777* | 777* | 777* | 960 | |||
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1155DXA* | 971* | 971* | 971* | 971* | |||
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Input__Airflow
| COOLING AIRFLOW REQUIREMENT (CFM) | ||||||
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| 600 | 800 | 1000 | 1200 | 1400 | 1600 | 2000 |
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0453BXA* | 194* | 194* | 240 | 288 | |||
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0703BXA* | 324* | 324* | 324* | 336 | |||
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0704CXA* | 291* | 291* | 336 | 384 | |||
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0904CXA* | 432* | 432* | 432* | 432* | |||
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0905DXA* | 388* | 388* | 388* | 480 | |||
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1155DXA* | 486* | 486* | 486* | 486* | |||
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*Minimum filter area dictated by heating airflow requirement. | *Minimum filter area dictated by heating airflow requirement. |
Disposable Minimum Filter Area (in2) | Permanent Minimum Filter Area (in2) |
[Based on a 300 ft/min filter face velocity] | [Based on 600 ft/min filter face velocity] |
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