Page 17
TABLE 8
Maximum Allowable Intake or Exhaust Vent Length in Feet
*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.
Standard Termination at Elevation 0 - 4500’
Number
Of 90̊̊
Elbows
Used
1-1/2” Pipe
2” Pipe
2-1/2” Pipe
3” Pipe
Model
Model
Model
Model
070
090
110
070
090
110
070
090
110
070
090
110
1
15
N/A
N/A
91
69
14
140
93
43
162
143
118
2
10
86
64
9
135
88
38
157
138
113
3
N/A
81
59
N/A
130
83
33
152
133
108
4
76
54
125
78
28
147
128
103
5
71
49
120
73
23
142
123
98
6
66
44
115
68
18
137
118
93
7
61
39
110
63
13
132
113
88
8
56
34
105
58
N/A
127
108
83
9
51
29
100
53
122
103
78
10
46
24
95
48
117
98
73
Standard Termination at Elevation 4501’ - 7500’
Number
of 90̊
Elbows
Used
1-1/2” Pipe
2” Pipe
2-1/2” Pipe
3” Pipe
Model
Model
Model
Model
070
090
110
070
090
110
070
090
110
070
090
110
1
13
N/A
N/A
66
69
14
115
93
43
137
143
118
2
8
61
64
110
88
132
138
113
9
38
3
N/A
56
59
105
83
127
133
108
N/A
33
4
51
54
100
78
122
128
103
28
5
46
49
95
73
23
117
123
98
6
41
44
90
68
18
112
118
93
7
36
39
85
63
107
113
88
13
8
31
34
80
58
102
108
83
29
9
26
75
53
97
103
78
24
10
21
70
48
92
98
73
Standard Termination 7501’ - 10,000”
Number
of 90̊
Elbows
Used
1-1/2 Pipe
2” Pipe
2-1/2” Pipe
3” Pipe
Model
Model
Model
Model
070
090
110
070
090
110
070
090
110
070
090
110
1
N/A
N/A
N/A
41
44
N/A
90
68
N/A
112
118
93
2
36
39
85
63
107
113
88
3
31
34
80
58
102
108
83
4
26
29
75
53
97
103
78
5
21
24
70
48
92
98
73
6
16
19
65
43
87
93
68
7
11
14
60
38
82
88
63
8
N/A
N/A
55
33
77
83
58
9
50
28
72
78
53
10
45
23
67
73
48
NOTE -
Table 8 continued on next page with concentric terminations.
Summary of Contents for SIGNATURE SLP99DF070V36
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