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506725-01Page 16 of 48 Issue 1109
TABLE 7
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.
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
100 80 43
n/a
127 127 108 108
2 56 41 19 95 75 38 122 122 103 103
3 51 36 14 90 70 33 11 7 117 98 98
4 46 31
n/a
85 65 28 11 2 112 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
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
A95DF / 95G1DF and A93DF / 92G1DF