035-15241-003 Rev. A (201)
Unitary Products Group
3
FURNACE SPECIFICATIONS
* All models are supplied with 3” vent connections. An installer supplied transition to 4” or 5” diameter must be used where necessary.
** Upflow / Horizontal applications only.
FIGURE 1: FURNACE DIMENSIONS AND SPECIFICATIONS
BTUH
INPUT
BTUH
OUTPUT
NOMINAL
CFM
FURNACE
WIDTH
A
BLOWER
WHEEL
SIZE
TEMP.
RISE
°F
MAX
OUTLET
TEMP. °F
MOTOR
HP
VENT
DIA.
DOWNFLOW
SUB-BASE
50,000
40,000
1200
17-1/2
10 x 8
30-60
160
1/3
3”
1FB0318
75,000
60,000
1200
17-1/2
10 x 8
35-65
165
1/3
4”
1FB0318
75,000
60,000
1600
21
10 x 10
30-60
160
1/2
4”
1FB0319
100,000
80,000
1600
21
10 x 10
40-70
170
1/2
4”
1FB0319
100,000
80,000
2000
24-1/2
(2) 10 x 6
35-65
165
3/4
4”
1FB0320
125,000
100,000
2000
24-1/2
(2) 10 x 6
40-70
170
3/4
5”
1FB0320
150,000**
120,000**
2000
24-1/2
(2) 10 x 6
40-70
170
3/4
5”
NA
MODEL
A
B
C
D
E
F
G
H
J
50/40/1200
75/60/1200
17-1/2
16-1/2
20-3/8
20
16
14-1/2
18-5/8
15-1/8
19
75/60/1600
100/80/1600
21
20
20-3/8
20
19-1/2
18
18-5/8
18-5/8
19
100/80/2000
125/100/2000
24-1/2
23-1/2
20-3/8
20
23
21-1/2
18-5/8
22-1/8
19
DOWNFLOW
UPFLOW
A
A
B
E
D
BOTTOM VIEW
F
G
29-3/4
29-3/4
C
31-1/2
31-1/2
14
BOTTOM VIEW
H
J
16-1/4
