508298-01
Page 16 of 55
Issue 2219
Maximum Allowable Intake or Exhaust Vent Length in Feet
Standard Termination at Elevation 0 - 2,000 ft
Number of
90° Elbows
Used
1-1/2” Pipe
2” Pipe
2-1/2" Pipe
3" Pipe
Capacity
Capacity
Capacity
Capacity
045
070
090
110
045
070
090
110
045
070
090
110
045
070
090
110
1
15
15
n/a
n/a
61
46
24
n/a
100
80
43
n/a
127
127
108
108
2
10
10
56
41
19
95
75
38
122
122
103
103
3
n/a
n/a
51
36
14
90
70
33
117
117
98
98
4
46
31
n/a
85
65
28
112
112
93
93
5
41
26
80
60
23
107
107
88
88
6
36
21
75
55
18
102
102
83
83
7
31
16
70
50
13
97
97
78
78
8
26
11
65
45
n/a
92
92
73
73
9
21
n/a
60
40
87
87
68
68
10
16
55
35
82
82
63
63
NOTE - 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.
NOTE - Additional vent pipe and elbows used to terminate the vent pipe outside the structure must be included in the total vent length
calculation.
Table 7A.
Maximum Allowable Intake or Exhaust Vent Length in Feet
Standard Termination at Elevation 2,001 - 10,000 ft
Number of 90°
Elbows Used
2” Pipe
2-1/2" Pipe
3" Pipe
Capacity
Capacity
Capacity
045
070
090
110
045
070
090
110
045
070
090
110
1
35
25
15
n/a
100
73
43
n/a
127
127
108
108
2
30
20
10
95
68
38
122
122
103
103
3
25
15
n/a
90
63
33
117
117
98
98
4
20
10
85
58
28
112
112
93
93
5
15
n/a
80
53
23
107
107
88
88
6
10
75
48
18
102
102
83
83
7
n/a
70
43
13
97
97
78
78
8
65
38
n/a
92
92
73
73
9
60
33
87
87
68
68
10
55
28
82
82
63
63
NOTE - 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.
NOTE - Additional vent pipe and elbows used to terminate the vent pipe outside the structure must be included in the total vent length
calculation.
Table 7B.
Summary of Contents for A96DF1E
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