Maximum Allowable Exposed Vent Lengths - International comfort products B Series Installation Instructions Manual

INSTALLATION INSTRUCTIONS
Table 17
Winter
Design
Pipe
Furnace Temp
Length in
Input °F (°C)
Ft. & M
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) (102)
FT 25 42 42 N/A
M 7.6 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 N/A
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 18.3
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 23.8
Ft. N/A 25 55 46
M N/A 7.6 16.8 14.0 10.1
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 26.2
Ft. N/A N/A 15 51
M N/A N/A 4.6 15.5 11.6
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 30.2
Ft. N/A N/A 10 61
M N/A N/A 3.0 18.6 14.3
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 Products 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
(38) (51) (64) (76) (102) (38)
N/A 25 115 111 N/A
N/A 7.6 35.1 33.8 N/A
N/A 25 75 66 N/A
N/A 7.6 22.9 20.1 N/A
N/A 65 52 45 N/A
N/A 19.8 15.8 13.7 N/A
N/A 49 38 31 N/A
N/A 14.9 11.6 9.4 N/A
N/A 30 135 163 142
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
6.1 21.3 53.3 55.8 46.9
21 20 70 132 111
6.4 6.1 21.3 40.2 33.8 27.1
1 20 70 94 77
0.3 6.1 21.3 28.7 23.5 17.4
0 20 70 71 56
0.0 6.1 21.3 21.6 17.1 11.6
78 N/A 25 110 233
N/A 7.6 33.5 71.0 80.8
33 N/A 25 110 145
N/A 7.6 33.5 44.2 35.7
11 N/A 25 110 103
3.4 N/A 7.6 33.5 31.4 24.1
0 N/A 25 95 77
0.0 N/A 7.6 29.0 23.5 16.8
86 N/A N/A 15 100
N/A N/A 4.6 30.5 66.8
38 N/A N/A 15 100
N/A N/A 4.6 30.5 39.6
14 N/A N/A 15 100
4.3 N/A N/A 4.6 30.5 26.8
0 N/A N/A 15 85
0.0 N/A N/A 4.6 25.9 18.9
99 N/A N/A 10 90
N/A N/A 3.0 27.4 64.0
47 N/A N/A 10 90
N/A N/A 3.0 27.4 46.6
21 N/A N/A 10 90
6.4 N/A N/A 3.0 27.4 31.7
NA N/A N/A 10 90
NA N/A N/A 3.0 27.4 22.9
Gas Furnace: N9MSB
1/2-in. (12.7 mm) Insulation
Pipe Diameter − in. (mm)
4 1 1/2 2 2 1/2 3
(51) (64) (76) (102)
N/A 25 115 130 N/A
N/A 7.6 35.1 39.6 N/A
N/A 25 90 79 N/A
N/A 7.6 27.4 24.1 N/A
N/A 25 64 55 N/A
N/A 7.6 19.5 16.8 N/A
N/A 25 48 40 N/A
N/A 7.6 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
6.1 21.3 53.3 65.5
89 20 70 157 133
6.1 21.3 47.9 40.5
57 20 70 113 94
6.1 21.3 34.4 28.7
38 20 70 86 70
6.1 21.3 26.2 21.3
265 N/A 25 110 235
N/A 7.6 33.5 71.6
117 N/A 25 110 173
N/A 7.6 33.5 52.7
79 N/A 25 110 124
N/A 7.6 33.5 37.8
55 N/A 25 110 94
N/A 7.6 33.5 28.7
219 N/A N/A 15 100
N/A N/A 4.6 30.5
130 N/A N/A 15 100
N/A N/A 4.6 30.5
88 N/A N/A 15 100
N/A N/A 4.6 30.5
62 N/A N/A 15 100
N/A N/A 4.6 30.5
210 N/A N/A 10 90
N/A N/A 3.0 27.4
153 N/A N/A 10 90
N/A N/A 3.0 27.4
104 N/A N/A 10 90
N/A N/A 3.0 27.4
75 N/A N/A 10 90
N/A N/A 3.0 27.4
440 01 4102 01
4
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