Maximum Allowable Exposed Vent Lengths In Unconditioned Space - International comfort products N9MSB Installation Instructions Manual

INSTALLATION INSTRUCTIONS
Table 17
N9MSB &
N9MSE
Winter Design Pipe Length
Furnace
Temp °F (°C) in Ft. & M
Input
20 (-10)
0 (-20)
40,000
-20 (-30)
-40 (-40)
20 (-10)
0 (-20)
60,000
-20 (-30)
-40 (-40)
20 (-10)
0 (-20)
80,000
-20 (-30)
-40 (-40)
20 (-10)
0 (-20)
100,000
-20 (-30)
-40 (-40)
20 (-10)
0 (-20)
120,000
-20 (-30)
-40 (-40)
20 (-10)
0 (-20)
140,000
-20 (-30)
-40 (-40)
56

Maximum Allowable Exposed Vent Lengths in Unconditioned Space

Maximum Length of Uninsulated and Insulated Vent Pipe-Ft (M)
No Insulation
Pipe Diameter − in. (mm)
1 1/2 2 2 1/2 3
(38) (51) (64) (76)
Ft. 48 42 42 N/A
M 14.6 12.8 12.8 N/A
Ft. 25 19 17 N/A
M 7.6 5.8 5.2 N/A
Ft. 14 7 5 N/A
M 4.3 2.1 1.5 N/A
Ft. 7 0 0 N/A
M 2.1 0.0 0.0 N/A
Ft. 30 61 61 54
M 9.1 18.6 18.6 16.5
Ft. 30 31 30 23
M 9.1 9.4 9.1 7.0
Ft. 24 17 15 7
M 7.3 5.2 4.6 2.1
Ft. 15 8 5 0
M 4.6 2.4 1.5 0.0
Ft. 20 70 78 70
M 6.1 21.3 23.8 21.3
Ft. 20 42 41 33
M 6.1 12.8 12.5 10.1
Ft. 20 25 23 14
M 6.1 7.6 7.0 4.3
Ft. 20 14 12 3
M 6.1 4.3 3.7 0.9
Ft. N/A 25 99 89
M N/A 7.6 30.2 27.1
Ft. N/A 25 55 46
M N/A 7.6 16.8 14.0
Ft. N/A 25 34 24
M N/A 7.6 10.4 7.3
Ft. N/A 23 20 11
M N/A 7.0 6.1 3.4
Ft. N/A N/A 15 99
M N/A N/A 4.6 30.2
Ft. N/A N/A 15 51
M N/A N/A 4.6 15.5
Ft. N/A N/A 15 28
M N/A N/A 4.6 8.5
Ft. N/A N/A 15 14
M N/A N/A 4.6 4.3
Ft. N/A N/A 10 90
M N/A N/A 3.0 27.4
Ft. N/A N/A 10 61
M N/A N/A 3.0 18.6
Ft. N/A N/A 10 35
M N/A N/A 3.0 10.7
Ft. N/A N/A 10 20
M N/A N/A 3.0 6.1
International Comfort Product, LLC S PO Box 128 S
Lewisburg, TN 37091 USA
Specifications subject to change without notice.
3/8-in. (9.5 mm) Insulation
Pipe Diameter − in. (mm)
4 1 1/2 2 2 1/2 3
(102) (38) (51) (64) (76)
N/A 50 122 111 N/A
N/A 15.2 37.2 33.8 N/A
N/A 50 75 66 N/A
N/A 15.2 22.9 20.1 N/A
N/A 50 52 45 N/A
N/A 15.2 15.8 13.7 N/A
N/A 50 38 31 N/A
N/A 15.2 11.6 9.4 N/A
N/A 30 135 163 142
N/A 9.1 41.1 49.7 43.3
N/A 30 113 100 85
N/A 9.1 34.4 30.5 25.9
N/A 30 81 70 57
N/A 9.1 24.7 21.3 17.4
N/A 30 61 52 40
N/A 9.1 18.6 15.8 12.2
60 20 70 175 183
18.3 6.1 21.3 53.3 55.8
21 20 70 132 111
6.4 6.1 21.3 40.2 33.8
1 20 70 94 77
0.3 6.1 21.3 28.7 23.5
0 20 70 71 56
0.0 6.1 21.3 21.6 17.1
78 N/A 25 110 233
23.8 N/A 7.6 33.5 71.0
33 N/A 25 110 145
10.1 N/A 7.6 33.5 44.2
11 N/A 25 110 103
3.4 N/A 7.6 33.5 31.4
0 N/A 25 95 77
0.0 N/A 7.6 29.0 23.5
86 N/A N/A 15 100
26.2 N/A N/A 4.6 30.5
38 N/A N/A 15 100
11.6 N/A N/A 4.6 30.5
14 N/A N/A 15 100
4.3 N/A N/A 4.6 30.5
0 N/A N/A 15 85
0.0 N/A N/A 4.6 25.9
99 N/A N/A 10 90
30.2 N/A N/A 3.0 27.4
47 N/A N/A 10 90
14.3 N/A N/A 3.0 27.4
21 N/A N/A 10 90
6.4 N/A N/A 3.0 27.4
NA N/A N/A 10 90
NA N/A N/A 3.0 27.4
Gas Furnace: N9MSB, N9MSE
1/2-in. (12.7 mm) Insulation
Pipe Diameter − in. (mm)
4 1 1/2 2 2 1/2 3
(102) (38) (51) (64) (76)
N/A 50 144 130 N/A
N/A 15.2 43.9 39.6 N/A
N/A 50 90 79 N/A
N/A 15.2 27.4 24.1 N/A
N/A 50 64 55 N/A
N/A 15.2 19.5 16.8 N/A
N/A 50 48 40 N/A
N/A 15.2 14.6 12.2 N/A
N/A 30 135 191 166
N/A 9.1 41.1 58.2 50.6
N/A 30 135 120 101
N/A 9.1 41.1 36.6 30.8
N/A 30 98 85 70
N/A 9.1 29.9 25.9 21.3
N/A 30 75 64 51
N/A 9.1 22.9 19.5 15.5
154 20 70 175 215
46.9 6.1 21.3 53.3 65.5
89 20 70 157 133
27.1 6.1 21.3 47.9 40.5
57 20 70 113 94
17.4 6.1 21.3 34.4 28.7
38 20 70 86 70
11.6 6.1 21.3 26.2 21.3
265 N/A 25 110 235
80.8 N/A 7.6 33.5 71.6
117 N/A 25 110 173
35.7 N/A 7.6 33.5 52.7
79 N/A 25 110 124
24.1 N/A 7.6 33.5 37.8
55 N/A 25 110 94
16.8 N/A 7.6 33.5 28.7
219 N/A N/A 15 100
66.8 N/A N/A 4.6 30.5
130 N/A N/A 15 100
39.6 N/A N/A 4.6 30.5
88 N/A N/A 15 100
26.8 N/A N/A 4.6 30.5
62 N/A N/A 15 100
18.9 N/A N/A 4.6 30.5
210 N/A N/A 10 90
64.0 N/A N/A 3.0 27.4
153 N/A N/A 10 90
46.6 N/A N/A 3.0 27.4
104 N/A N/A 10 90
31.7 N/A N/A 3.0 27.4
75 N/A N/A 10 90
22.9 N/A N/A 3.0 27.4
440 01 4101 03
4
(102)
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
181
55.2
107
32.6
71
21.6
50
15.2
229
69.8
140
42.7
97
29.6
70
21.3
250
76.2
156
47.5
108
32.9
79
24.1
210
64.0
183
55.8
128
39.0
94
28.7