Allied Air 96G2DFV Installation Instructions Manual page 20

96G2DFV Maximum Allowable Exhaust Vent Length Using Ventilated Attic or Crawl Space for Intake Air in Feet
1-1/2" Pipe
Number
Capacity
of 90°
Elbows
045 070
Used
1 15
2 10
3
4
5
n/a
6
n/a
7
8
9
10
NOTE: Additional vent pipe and elbows used to terminate the vent pipe outside the structure must be included in the total vent length
calculation.
Page 20 of 54
Standard Termination at Elevation 0 - 10,000 ft
2" Pipe
Capacity
090 110 045 070
56 41
51 36
46 31
41 26
36 21
n/a n/a
31 16
26 11
21 6
16 1
11 n/a
Figure 23. Typical Exhaust Pipe Connections
2-1/2" Pipe
Capacity
090 110 045 070
24 85 85
19 80 80
14 75 75
9 70 70
4 65 65
n/a
60 60
55 55
n/a 50 50
45 45
40 40
Table 7C.
Issue 1922
3" Pipe
Capacity
090 110 045 070
63 28 103 102
58 23 98 97
53 18 93 92
48 13 88 87
43 8 83 82
38 3 78 77
33 73 72
28 68 67
n/a
23 63 62
18 58 57
090 110
83 83
78 78
73 73
68 68
63 63
58 58
53 53
48 48
43 43
38 38
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