32-5035-13
7
User’s Information
For vertical UPFLOW ONLY, a left or right return air
inlet as above (left side shown) requires trimming of
the factory supplied filter to 17" x 25" x 1" for both the
21" and 24-1/2" wide furnaces.
Air filters may also be located outside of the furnace
using a
SIDe FIlTeR FRAme.
upflow/ Horizontal Furnace Filters
The Upflow/ Horizontal furnace when installed hori-
zontally requires a horizontal filter kit. The filters 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 filters.
An upflow/horizontal furnace in horizontal return air
filter application, as shown, features two 16" x 20" x
1" filters in the 17-1/2", 21" and 24-1/2" wide furnace
cabinets.
To replace filters, remove the filter access door, lift the
filter from the lower bracket and shift the filter to the
side to free the top filter from the bracket and slide the
filters out through the filter access door. After cleaning,
replace the filters in the same manner making sure
that the filters are secured in place in both top and bot-
tom filter brackets. Replace filter access door.
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"
** ON UPFLOW 5 TON AIRFLOW MODELS, IF THE AIR-
FLOW REQUIREMENT EXCEEDS 1800 CFM, THESE
MODELS WILL REQUIRE FILTERS ON BOTH SIDES
OR
1 SIDE AND THE BOTTOM,
OR
JUST THE BOTTOM
uPFLOW
ONLy
Airflo
w
DOWNFLOW FILTER
Airflow
uPFLOW/HORIZONTAL WITH FILTER KIT
Airflow
Air filters may also be located outside of the furnace
using a remote filter grille
. The filter grille could be in
a hallway, wall, or in the ceiling. Check with your deal-
er for the exact location of your filter and the method
of changing the filters.
uPFLOW (vertical) FILTER TAbLES
Downflow/ Horizontal furnaces are factory supplied
with 2 standard size permanent 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 return air filter appli-
cation, as shown, features two 14" x 20" x 1" filters in
the 17-1/2" wide furnace cabinets; or two 16" x 20" x 1"
filters in the 21" and 24-1/2" wide furnace cabinets.
