912SE: Product Data
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
8
MAXIMUM ALLOWABLE EXPOSED VENT LENGTH
Maximum Allowable Exposed Vent Lengths in Unconditioned Space Insulation Table - Ft.
Maximum Allowable Exposed Vent Length in Unconditioned Space - Meters
Winter
Design
Temp °F
Unit Size
40,000
*
BTUH
*. Not all model families have this size.
60,000 BTUH
Uninsulated
3/8-in.
Insulation
1/2-in.
Insulation
Uninsulated
3/8-in. Insulation
1/2-in. Insulation
Pipe Dia.
in.
1 ½
2
2 ½ 1 ½
2
2 ½ 1 ½
2
2 ½
1 ½
2
2 ½ 3
1 ½
2
2 ½
3
1 ½
2
2 ½ 3
20
20
20
20
20
50
45
20
60
50 20
30
30
25
20
75
65
60
20
85
75
65
0
10
5
5
20
25
20
20
30
25 15
15
10
10
20
40
30
25
20
45
40
30
-20
5
20
15
10
20
20
15 10
5
20
25
20
15
20
30
25
20
-40
15
10
5
15
15
10 5
20
15
15
10
20
20
15
10
Winter
Design
Temp °F
Unit Size
80,000 BTUH
Uninsulated
3/8-in. Insulation
1/2-in. Insulation
Pipe Dia. in. 1 ½
2
2 ½
3
4
1 ½
2
2 ½
3
4
1 ½
2
2 ½
3
4
20
15
40
40
35
30
15
50
90
75
65
15
50
70
70
70
0
15
20
15
10
5
15
50
45
35
30
15
50
50
40
35
-20
15
10
5
15
35
30
20
15
15
40
30
25
15
-40
10
5
15
25
20
15
5
15
30
25
20
10
Winter
Design
Temp °F
Unit Size
100,000 BTUH
120,000 BTUH
Uninsulated
3/8-in. Insulation
1/2-in. Insulation
Uninsulated
3/8-in. Insulation 1/2-in. Insulation
Pipe Dia.
in.
2 2 ½ 3
4
2 2 ½ 3
4
2 2 ½ 3
4
2 ½
3
4
2 ½
3
4
2 ½
3
4
20
20 50 40 35 20 80 95 80 20 80 105 90 10
50
40
10
75
95
10
75
105
0
20 20 15 10 20 55 45 35 20 65 55 45 10
20
15
10
55
45
10
65
50
-20
15 10
5
20 35 30 20 20 45 35 25 10
10
10
35
25
10
45
30
-40
10
5
20 25 20 10 20 30 25 15 10
5
10
25
15
10
30
20
Winter
Design
Temp °C
Unit
Size
40,000
*
BTUH
*. Not all model families have this size.
60,000 BTUH
Uninsulated
3/8-in.
Insulation
1/2-in.
Insulation
Uninsulated
3/8-in. Insulation
1/2-in. Insulation
Pipe
Dia. mm 38
51
64 38
51
64 38
51
64
38
51
64 76
38
51
64 76
38 51
64 76
-7
6.1 6.1 6.1 6.1 15.2 13.7 6.1 18.3 15.2
6.1 9.1 9.1 7.6 6.1 22.9 19.8 18.3 6.1 25.9 22.9 19.8
-18
3.0 1.5 1.5 6.1 7.6 6.1 6.1 9.1 7.6 4.6 4.6 3.0 3.0 6.1 12.2 9.1 7.6 6.1 13.7 12.2 9.1
-29
1.5
6.1 4.6 3.0 6.1 6.1 4.6 3.0 1.5
6.1 7.6 6.1 4.6 6.1 9.1 7.6 6.1
-40
4.6 3.0 1.5 4.6 4.6 3.0 1.5
6.1 4.6 4.6 3.0 6.1 6.1 4.6 3.0
Winter
Design
Temp °C
Unit
Size
80,000 BTUH
Uninsulated
3/8-in. Insulation
1/2-in. Insulation
Pipe
Dia. mm
38
51
64
76
102
38
51
64
76
102
38
51
64
76
102
-7
4.6
12.2
12.2
10.7
9.1
4.6
15.2
27.4
22.9
19.8
4.6
15.2
21.3
21.3
21.3
-18
4.6
6.1
4.6
3.0
1.5
4.6
15.2
13.7
10.7
9.1
4.6
15.2
15.2
12.2
10.7
-29
4.6
3.0
1.5
4.6
10.7
9.1
6.1
4.6
4.6
12.2
9.1
7.6
4.6
-40
3.0
1.5
4.6
7.6
6.1
4.6
1.5
4.6
9.1
7.6
6.1
3.0
Winter
Design
Temp
°C
Unit
Size
100,000 BTUH
120,000 BTUH
Uninsulated
3/8-in. Insulation
1/2-in. Insulation
Uninsulated
3/8-in.
Insulation
1/2-in.
Insulation
Pipe
Dia.
mm
51
64 76 102 51
64 76 102 51
64 76 102
64 76
102
64
76 102 64 76
102
-7
6.1 15.2 12.2 10.7 6.1 24.4 28.9 24.4 6.1 24.4 32.0 27.4
3.0 15.2 12.2 3.0 22.9 28.9 3.0 22.9 32.0
-18
6.1 6.1 4.6 3.0 6.1 16.8 13.7 10.7 6.1 19.8 16.7 13.7
3.0 6.1
4.6
3.0 16.8 13.7 3.0 19.8 15.2
-29
4.6 3.0 1.5
6.1 10.7 9.1 6.1 6.1 13.7 10.7 7.6
3.0 3.0
3.0 10.7 7.6 3.0 13.7 9.1
-40
3.0 1.5
6.1 7.6 6.1 3.0 6.1 9.1 7.6 4.6
3.0 1.5
3.0
7.6
4.6 3.0 9.1
6.1
