2
Unitary Products Group
036-21560-001 Rev. A (0204)
Three elbows (two in vent pipe and one in the air intake pipe) are already accounted for and need not be included in the elbow count
from the Table above.
28-1/2
26-1/2
24-5/8
40
A
26-1/2
25-3/8
C
19-1/4
1-1/4
1-1/4
21-5/8
29
21-7/8
11-11/16
18-1/2
7-1/2
29
21-15/16
21-9/16
18-1/2
9-1/8
8-1/2
5/8
5/8
23-5/8
D
2-1/4
23-1/4
20
B
T’STAT WIRING
7/8” K.O.
HORIZONTAL
CONDENSATE
DRAIN 2” K.O.
7/8” JUNCTION
BOX HOLE
1-1/2” GAS
PIPE ENTRY
CONDENSATE
DRAIN 7/8” K.O.
T’STAT WIRING
7/8” K.O.
HORIZONTAL
CONDENSATE
DRAIN 2” K.O.
7/8” JUNCTION
BOX HOLE
1-1/2” GAS
PIPE ENTRY
CONDENSATE
DRAIN 7/8” K.O.
BOTTOM IMAGE
RETURN END
TOP IMAGE
SUPPLY END
BTUH (kW)
Input/Output
CFM
Cabinet
Size
Cabinet Dimension
A (in.)
A (cm)
B (in.)
B (cm)
C (in.)
C (cm)
D (in.)
D (cm)
60/55 (17.57/16.10)
1200 (33.98)
B
17-1/2
44.4
16-1/4
41.3
15-1/8
38.4
1-3/4
4.44
80/75 (23.42/21.96)
1200 (33.98)
B
17-1/2
44.4
16-1/4
41.3
15-1/8
38.4
1-3/4
4.44
80/75 (23.42/21.96)
1600 (45.31)
C
21
53.3
19-3/4
50.2
18-1/2
47.0
2-1/8
5.40
100/95 (29.28/27.82)
1600 (45.31)
C
21
53.3
19-3/4
50.2
18-1/2
47.0
2-1/8
5.40
100/95 (29.28/27.82)
2000 (56.63)
C
21
53.3
19-3/4
50.2
18-1/2
47.0
2-1/8
5.40
120/112 (35.14/32.80)
2000 (56.63)
D
24-1/2
62.2
23-1/4
59.1
21-7/8
55.6
2-1/2
6.35
COMBUSTION AIR SUPPLY AND VENT PIPING
MAXIMUM ELBOWS AND VENT LENGTHS
Models Input
BTUH (kW)
Pipe Size
Inches (mm)
Maximum Number of Elbows*
Minimum
Length
1 2 3 4 5 6 7 8
60,000 (17.6)
1-1/2 (38)
15
10
N/A
N/A
N/A
N/A
N/A
N/A
1.5
60,000 (17.6)
2 (51)
60
55
50
45
40
35
25
15
1.5
60,000 (17.6)
3 (76)
85
80
75
70
65
60
50
40
10
80,000 (23.4)/1200
2 (51)
60
55
50
45
40
35
25
15
1.5
80,000 (23.4)/1200
3 (76)
85
80
75
70
65
60
50
40
10
80,000 (23.4)/1600
2 (51)
25
20
15
10
N/A
N/A
N/A
N/A
1.5
80,000 (23.4)/1600
3 (76)
85
80
75
70
65
60
50
40
10
100,000 (29.3)
2 (51)
25
20
15
10
N/A
N/A
N/A
N/A
1.5
100,000 (29.3)
3 (76)
80
75
70
65
60
55
45
35
1.5
120,000 (35.1)
3 (76)
55
50
45
40
35
25
15
N/A
1.5
