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A95DF / 95G1DF and A93DF / 92G1DF Maximum Allowable Exhaust Vent Length with Furnace Installed in a Closet
Number of 90°
Elbows Used
045
1
51
2
46
3
41
4
36
5
31
6
26
7
21
8
16
9
11
10
6
NOTE: Additional vent pipe and elbows used to terminate the vent pipe outside the structure must be included in the total vent length
calculation.
507271-02
or Basement Using Ventilated Attic or Crawl Space for Intake in Feet
Standard Termination at Elevation 0 - 4,500 ft
2" Pipe
Model
070
090
110
36
14
31
9
26
4
21
16
n/a
11
6
n/a
n/a
Figure 23. Typical Exhaust Pipe Connections
2-1/2" Pipe
Model
045
070
090
85
100
28
80
958
23
75
90
18
70
85
13
65
80
8
60
75
55
70
50
65
n/a
60
55
Table 7B.
Issue 1917
3" Pipe
Model
110
045
070
107
107
102
102
97
97
92
92
87
87
n/a
82
82
77
77
72
72
67
67
62
62
090
110
88
88
83
83
78
78
73
73
68
68
63
63
58
58
53
53
48
48
43
43
Page 19 of 51
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