TABLE 21
NOTE - 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 - 4500 ft
Maximum Allowable Intake or Exhaust Vent Length in Feet
Number Of 90°
Elbows Used
2” Pipe 3” Pipe
Model Model
040 060 080 040 060 080
1 44
2
71 127
4 29 122
24 117
41 19 112
7 14 107
102
9 41 97
10 21 92
Standard Termination at Elevation 4501 - 6000 ft
Number Of 90°
Elbows Used
2” Pipe 3” Pipe
Model Model
040 060 080 040 060 080
1 41 100
2 29 100
71 24 90
4 19 90
21 14
9
7 11
70
70
9 41
10
Standard Termination at Elevation 6001 - 7500 ft
Number Of 90°
Elbows Used
2” Pipe 3” Pipe
Model Model
040 060 080 040 060 080
1 29 24 100
2 24 19 100
71 19 14 90
4 14 9 90
9
7 70
70
9 41
10
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