Page 20
TABLE 5 Continued
Maximum Allowable Intake or Exhaust Vent Length in Feet
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Concentric Termination at Elevation 0 - 4500 ft
No.
Of 90°
Elbows
1-1/2” Pipe 2” Pipe 2-1/2” Pipe 3” Pipe
Model Model Model Model
030 045 070 090 110
030
045
070 090 110
030
045
070 090 110
030
045
070 090 110
1 201510
n/a n/a
73 58 42 22 105 105 89 54 121 121 114 114
21510
n/a
68 53 37 17 100 100 84 49 116 116 109 109
310
n/a
63 48 32 12 95 95 79 44 111 111 104 104
4
n/a
58 43 27
n/a
90 90 74 39 106 106 99 99
5 533822 858569341011019494
6 483317 8080642996968989
7 432812 7575592491918484
83823
n/a
70 70 54 19 86 86 79 79
9 3318 6565491481817474
10 28 13 60 60 44 n/a 76 76 69 69
Concentric Termination Elevation 4500 - 10,000 ft
No.
Of 90°
Elbows
1-1/2” Pipe 2” Pipe 2-1/2” Pipe 3” Pipe
Model Model Model Model
030 045 070 090 110
030
045
070 090 110
030
045
070 090 110
030
045
070 090 110
1 201510
n/a n/a
73 58 42
n/a
105 105 89 54 121 121 114 114
21510
n/a
68 53 37 100 100 84 49 116 116 109 109
310
n/a
63 48 32 95 95 79 44 111 111 104 104
4
n/a
58 43 27 90 90 74 39 106 106 99 99
5 533822 858569341011019494
6 483317 8080642996968989
7 432812 7575592491918484
83823
n/a
70 70 54 19 86 86 79 79
9 3318 6565491481817474
10 28 13 60 60 44 n/a 76 76 69 69