Fig. 2—Dimensional DrawingDIMENSIONS (IN.)

UNIT SIZE A D E

024040 17-1/2 15-7/8 16

036040 17-1/2 15-7/8 16

024060 17-1/2 15-7/8 16

036060 17-1/2 15-7/8 16

048060 17-1/2 15-7/8 16

036080 17-1/2 15-7/8 16

048080 17-1/2 15-7/8 16

060080 21 19-3/8 19-1/2

048100 21 19-3/8 19-1/2

060100 21 19-3/8 19-1/2

060120 24-1/2 22-7/8 23

→060140 24-1/2 22-7/8 23

A93023
17 5⁄16"
24 1⁄2"
27 9⁄16"
TYP
27 5⁄8"
29 11⁄16"
TYP
30 13⁄16"
32 5⁄8"
TYP
33 1⁄4"
TYP
CONDENSATE
DRAIN TRAP
LOCATION
(ALTERNATE
UPFLOW)
7
⁄8-IN. DIA
ACCESSORY
POWER ENTRY
7
⁄8-IN. DIA
POWER CONN
CONDENSATE DRAIN
TRAP LOCATION
(DOWNFLOW &
HORIZONTAL LEFT)
26 15⁄16"
24 1⁄2"
22 5⁄16"
2-IN. COMBUSTION-
AIR CONN
1⁄2-IN. DIA
GAS CONN
2-IN. VENT CONN
1⁄2-IN. DIA THERMOSTAT
ENTRY
22 11⁄16"
SIDE INLET
23 1⁄4" TYP
SIDE INLET
11⁄4"
1"
OUTLET
26 15⁄16"
28 1⁄2"
22 5⁄16"
19"13⁄16"
5⁄8"
5⁄16"
1"
39 7⁄8"
22 1⁄4" TYP
11⁄16"
7⁄16"
24 3⁄16"
BOTTOM INLET
18 1⁄4"
22 11⁄16"
2-IN. COMBUSTION-
AIR CONN
1⁄2-IN. DIA
GAS CONN
7⁄8-IN. DIA
POWER CONN
1⁄2-IN. DIA
THERMOSTAT ENTRY
2-IN. VENT CONN
DIMPLE LOCATORS
FOR HORIZONTAL
HANGING
14 1⁄2"
TYP SIDE INLET

NOTES: Minimum return-air opening at furnace:

1.

2.

3.

4.

For 800 CFM--16-In. round or 14 1/2 x 12-In. rectangle.

For 1200 CFM--20-In. round or 14 1/2 x 19 1/2-In. rectangle.

For 1600 CFM--22-In. round or 14 1/2 x 23 1/4-In. rectangle.

For airflow requirements above 1800 CFM, use both side inlets, a

combination of 1 side inlet and the bottom, or the bottom only.

9 7⁄16"
TYP
26 15⁄16" TYP
CONDENSATE
DRAIN LOCATION
(UPFLOW)
30 1⁄2"
9⁄16"
TYP
CONDENSATE
DRAIN LOCATION
(UPFLOW)
E
INLET
11/16"
11/16"
D13/16"
13/16"
OUTLET
A
AIRFLOW 26 1⁄4"
26 1⁄4"
CONDENSATE DRAIN
TRAP LOCATION
(DOWNFLOW &
HORIZONTAL RIGHT)
OR ALTERNATE
1⁄2
-IN. DIA GAS CONN
—2—