COMFORT-AIRE Century GDD95C Series, Installation Instructions Manual

Page: 16 / 53

507735-03 Page 16 of 53 Issue 1933
Maximum Allowable Intake or Exhaust Vent Length in Feet
Standard Termination at Elevation 0 − 10,000 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 20 15
n/a n/a
61 46 24
n/a
100 80 43
n/a
127 127 108 108
2 15 10 56 41 19 95 75 38 122 122 103 103
3 10
n/a
51 36 14 90 70 33 117 117 98 98
4
n/a
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
Concentric Termination Elevation 0 − 10,000 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 10
n/a n/a
53 38 22
n/a
90 70 39
n/a
111 111 104 104
2 10
n/a
48 33 17 85 65 34 106 106 99 99
3
n/a
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.
Table 7.