507714-01
Page 17 of 52
Issue 1716
GDD95A / GDD92A Maximum Allowable Intake or Exhaust Vent Length in Feet
Table 7A.
Standard Termination at Elevation 0 - 10,000 ft
Number of 90°
Elbows Used
2" Pipe
2-1/2" Pipe
3" Pipe
Model
Model
Model
045
070
090
110
045
070
090
110
045
070
090
110
1
61
46
24
n/a
95
80
43
n/a
127
127
108
108
2
56
41
19
90
75
38
122
122
103
103
3
51
36
14
85
70
33
117
117
98
98
4
46
31
n/a
80
65
28
112
112
93
93
5
41
26
75
60
23
107
107
88
88
6
36
21
70
55
18
102
102
83
83
7
31
16
65
50
13
97
97
78
78
8
26
11
60
45
n/a
92
92
73
73
9
21
n/a
55
40
87
87
68
68
10
16
50
35
82
82
63
63
Concentric Termination Elevation 0 - 10,000 ft
Number of 90°
Elbows Used
2" Pipe
2-1/2" Pipe
3" Pipe
Model
Model
Model
045
070
090
110
045
070
090
110
045
070
090
110
1
53
38
22
n/a
90
70
39
n/a
111
111
104
104
2
48
33
17
85
65
34
106
106
99
99
3
43
28
12
80
60
29
101
101
94
94
4
38
23
n/a
75
55
24
96
96
89
89
5
33
18
70
50
19
91
91
84
84
6
28
13
65
45
14
86
86
79
79
7
23
n/a
60
40
n/a
81
81
74
74
8
18
55
35
76
76
69
69
9
13
50
30
71
71
64
64
10
n/a
45
25
66
66
59
59
*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.
