32-5035-08
7
User’s Information
Upfl ow/ Horizontal Furnace Filters
The Upfl ow/ Horizontal furnace when installed hori-
zontally requires a horizontal fi lter kit. The fi lters may
be located remote to the furnace or in the return air
duct near the furnace. 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 bot-
tom 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 hallway, wall, or in the ceiling. Check with your deal-
er for the exact location of your fi lter and the method
of changing the fi lters.
REQUIRED FILTERS - BOTTOM
CABINET WIDTH
FILTER QUANTITY & SIZE
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
17-1/2"
1 - 17" X 25" X 1"
21"
1 - 17" X 25" X 1"
24-1/2"
1 - 17" X 25" X 1"
** O
N
UPFLO
W
5 TO
N
AIRFLO
W
MODELS, IF THE AIR-
FLO
W
REQUIREME
N
T EXCEEDS 1800 CFM, THESE
MODELS
W
ILL REQUIRE FILTERS O
N
BOTH SIDES
OR
1 SIDE A
N
D THE BOTTOM,
OR
JUST THE BOTTOM
UPFLOW
ONLY
Airfl
o
w
DOWNFLOW FILTER
Airfl o
w
UPFLOW/HORIZONTAL WITH FILTER KIT
Airfl o
w
UPFLOW (Vertical) FILTER TABLES
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 appli-
cation, 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.
