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American Standard Noncondensing Gas Furnaces User's Information Manual Page 17

American standard noncondensing gas furnaces user's information guide.
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FACTORY SUPPLIED UPFLOW FURNACE
RETURN AIR FILTERS
UPFLOW FURNACE RETURN AIR FILTERS
CABINET
QTY*
WIDTH
BOTTOM FILTER
14-1/2"
1
14" X 25" X 1"
17-1/2"
1
17" X 25" X 1"
21"
1
20" X 25" X 1"
24-1/2"
1
24" X 25" X 1"
*NOTE - On 5 or 6 ton airflow models, if the airflow
requirement exceeds 1800 CFM, these models will require
filters on both sides; OR 1 side and the bottom; OR just the
bottom.
WARNING:
unit before removing the blower door. Failure to
follow this warning could result in property damage,
personal injury or death.
Downflow Furnace Filters
Downflow/Horizontal furnaces use 2 standard size perma-
nent type air filters which may be located remote to the
furnace or in the return air duct. Check with your dealer
for the location of your filters.
A downflow/horizontal furnace vertical return air filter
application, as shown, features two 14" x 20" x 1" filter in
the 14-1/2" wide furnace cabinets; or two 16" x 20" x 1" filter
in the 17-1/2", 21", and 24-1/2" wide furnace cabinets.
DOWNFLOW FILTER
Pub. No. 32-5034-02
CABINET
CABINET
SIDE FILTER
17-1/2" X 25" X 1"
17-1/2" X 25" X 1"
17-1/2" X 25" X 1"
17-1/2" X 25" X 1"
Disconnect power to the
A downflow/horizontal furnace with horizontal return air
filter application, as shown, features two 14" x 20" x 1"
filter in the 14-1/2" wide furnace cabinets; or two 16" x 20"
x 1" filter in the 17-1/2", 21", and 24-1/2" wide furnace
cabinets.
DOWNFLOW/HORIZONTAL FILTER
DOWNFLOW FILTER TABLE
REQUIRED FILTERS - DOWNFLOW
CABINET WIDTH
14-1/2"
17-1/2"
21"
24-1/2"
FILTER QUANTITY & SIZE
2 - 14" X 20" X 1"
2 - 16" X 20" X 1"
2 - 16" X 20" X 1"
2 - 16" X 20" X 1"
Page 5

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