32-5027-13
5
User’s Information
Upfl ow / Horizontal Furnace Filters
The Upfl ow/Horizontal furnace when installed horizontally
requires a horizontal fi lter kit. The fi lters may be located
remote to the furnace or in the return air duct near the fur-
nace. Check with your dealer for the location of your fi lters.
An upfl ow/horizontal furnace in horizontal return air fi lter
application, as shown, features two 16" x 20" x 1" fi lters in
the 17-1/2", 21" and 24-1/2" wide furnace cabinets.
To replace fi lters, remove the fi lter access door, lift the
fi lter from the lower bracket and shift the fi lter to the side
to free the top fi lter from the bracket and slide the fi lters
out through the fi lter access door. After cleaning, replace
the fi lters in the same manner making sure that the fi lters
are secured in place in both top and bottom fi lter brackets.
Replace fi lter access door.
Air fi lters may also be located outside of the furnace using
a remote fi lter grille
.
The fi lter grille could be in a hall-
way, wall, or in the ceiling. Check with your dealer for the
exact location of your fi lter and the method of changing the
fi lters.
UPFLOW FILTER TABLES
REQUIRED FILTERS - BOTTOM
CABINET WIDTH
FILTER QUANTITY & SIZE
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"
REQUIRED FILTERS - SIDE
**
CABINET WIDTH
FILTER QUANTITY & SIZE
14-1/2"
1 - 17" 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"
** ALL 5 TON AIRFLOW MODELS ("960", "961", OR
"972"),
REQUIRE
BOTH SIDES
OR
1 SIDE AND THE
BOTTOM,
OR
JUST THE BOTTOM FOR SUFFICIENT
AIRFLOW
Downfl ow/Horizontal furnaces are factory supplied with
2 standard size permanent type air fi lters which may be
located remote to the furnace or in the return air duct.
Check with your dealer for the location of your fi lters.
A downfl ow/horizontal furnace return air fi lter applica-
tion, as shown, features two 14" x 20" x 1" fi lters in the
17-1/2" wide furnace cabinets; or two 16" x 20" x 1" fi lters
in the 21" and 24-1/2" wide furnace cabinets.
DOWNFLOW FILTER TABLE
REQUIRED FILTERS - DOWNFLOW
CABINET WIDTH
FILTER QTY AND SIZE
14-1/2"
2 - 14" X 20" X 1"
17-1/2"
2 - 16" X 20" X 1"
21"
2 - 16" X 20" X 1"
24-1/2"
2 - 16" X 20" X 1"
UPFLOW/HORIZONTAL WITH FILTER KIT
Airfl ow
DOWNFLOW FILTER
Airfl ow
DOWNFLOW/HORIZONTAL FILTER
Airfl o
w
