Allied A97UH2E - Page 32

508433-01Issue 2345Page 32 of 70
Maximum Allowable Intake or Exhaust Vent Length in Feet
Standard Termination at Elevation 0 - 4,500 ft
Number
of 90°
Elbows
Used
1-1/2” Pipe 2” Pipe 2-1/2" Pipe 3" Pipe
Model Model Model Model
030
045
70 90 110
030
045
70 90 110
030
045
70 90 110
030
045
70 90 110
1 25 20
n/a n/a
76 61 39 19 110 110 88 53 133 132 113 113
2 20 15 71 56 34 14 105 105 83 48 128 127 108 108
3 15 10 66 51 29 9 100 100 78 43 123 122 103 103
4 10
n/a
61 46 24
n/a
95 95 73 38 118 117 98 98
5
n/a
56 41 10 90 90 68 33 113 112 93 93
6 51 36 14 85 85 63 28 108 107 88 88
7 46 31 9 80 80 58 23 103 102 83 83
8 41 26
n/a
75 75 53 18 98 97 78 78
9 36 21 70 70 48 13 93 92 73 73
10 31 16 65 65 43 8 89 87 68 68
Standard Termination at Elevation 4,501 - 10,000 ft
Number
of 90°
Elbows
Used
1-1/2” Pipe 2” Pipe 2-1/2" Pipe 3" Pipe
Model Model Model Model
030
045
70 90 110
030
045
70 90 110
030
045
70 90 110
030
045
70 90 110
1 25 20
n/a n/a
76 61 39
n/a
110 110 88 53 133 132 113 113
2 20 15 71 56 34 105 105 83 48 128 127 108 108
3 15 10 66 51 29 100 100 78 43 123 122 103 103
4 10
n/a
61 46 24 95 95 73 38 118 117 98 98
5
n/a
56 41 19 90 90 68 33 113 112 93 93
6 51 36 14 85 85 63 28 108 107 88 88
7 46 31 9 80 80 58 23 103 102 83 83
8 41 26
n/a
75 75 53 18 98 97 78 78
9 36 21 70 70 48 13 93 92 73 73
10 31 16 65 65 43 8 88 87 68 68
*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 13A.