Allied A97UH2E - Page 33

508433-01 Issue 2345 Page 33 of 70
Maximum Allowable Intake or Exhaust Vent Length in Feet
Concentric 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 20 15
n/a n/a
68 53 37 17 100 100 84 49 116 116 109 109
2 15 10 63 48 32 12 95 95 79 44 111 111 104 104
3 10
n/a
58 43 27 7 90 90 74 39 106 106 99 99
4
n/a
53 38 22
n/a
85 85 69 34 101 101 94 94
5 48 33 17 80 80 64 29 96 96 89 89
6 43 28 12 75 75 59 24 91 91 84 84
7 38 23 7 70 70 54 19 86 86 79 79
8 33 18
n/a
65 65 49 14 81 81 74 74
9 28 13 60 60 44 9 76 76 69 69
10 23 8 55 55 39 n/a 71 71 64 64
Concentric Termination 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 20 15
n/a n/a
68 53 37
n/a
100 100 84 49 116 116 109 109
2 15 10 63 48 32 95 95 79 44 111 111 104 104
3 10
n/a
58 43 27 90 90 74 39 106 106 99 99
4
n/a
53 38 22 85 85 69 34 101 101 94 94
5 48 33 17 80 80 64 29 96 96 89 89
6 43 28 12 75 75 59 24 91 91 84 84
7 38 23 7 70 70 54 19 86 86 79 79
8 33 18
n/a
65 65 49 14 81 81 74 74
9 28 13 60 60 44 9 76 76 69 69
10 23 8 55 55 39 n/a 71 71 64 64
*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 13B.