507962-01G / 31-5000654
Page 19 of 51
Issue 2149
Maximum Allowable Intake or Exhaust Vent Length in Feet
Concentric Termination at Elevation 0 - 4,500 ft
Number of
90° Elbows
Used
1-1/2” Pipe
2” Pipe
2-1/2" Pipe
3" Pipe
Capacity
Capacity
Capacity
Capacity
070
090
110
070
090
110
070
090
110
070
090
110
1
n/a
n/a
n/a
43
27
7
90
74
39
106
99
99
2
38
22
n/a
85
69
34
101
94
94
3
33
17
80
64
29
96
89
89
4
28
12
75
59
24
91
84
84
5
23
7
70
54
19
86
79
79
6
18
n/a
65
49
14
81
74
74
7
13
60
44
9
76
69
69
8
n/a
55
39
n/a
71
64
64
9
50
34
66
59
59
10
45
29
61
54
54
Concentric Termination at Elevation 4,501 - 10,000 ft
Number of
90° Elbows
Used
1-1/2” Pipe
2” Pipe
2-1/2" Pipe
3" Pipe
Capacity
Capacity
Capacity
Capacity
070
090
110
070
090
110
070
090
110
070
090
110
1
n/a
n/a
n/a
43
27
n/a
90
74
39
106
99
99
2
38
22
85
69
34
101
94
94
3
33
17
80
64
29
96
89
89
4
28
12
75
59
24
91
84
84
5
23
7
70
54
19
86
79
79
6
18
n/a
65
49
14
81
74
74
7
13
60
44
9
76
69
69
8
8
55
39
n/a
71
64
64
9
n/a
50
34
66
59
59
10
45
29
61
54
54
*Size intake and exhaust pipe length separately. Values in table are for intake OR Exhaust, not combined total. Both Intake and
Exhaust must be same pipe size.
Table 7B.