Lennox DAVE SIGNATURE SL297UHNV Installation Instructions Manual page 16

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.
Number Of 90°
Elbows Used
040
1 81
2 76
3 71
4 66
5 61
6 56
7 51
8 46
9 41
10 36
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.
Number Of 90°
Elbows Used
040
1 73
2 68
3 63
4 58
5 53
6 48
7 43
8 38
9 33
10 28
TABLE 5
Standard Termination at Elevation 0 - 4500 ft
2" Pipe
Model
060
66
61
56
51
46
41
36
31
26
21
TABLE 5 Continued
Maximum Allowable Intake or Exhaust Vent Length in Feet
Concentric Termination at Elevation 0 - 4500 ft
2" Pipe
Model
060
58
53
48
43
38
33
28
23
18
13
Page 16
080 040
44 138
39 133
34 128
29 123
24 118
19 113
14 108
103
n/a 98
93
080 040
42 121
37 116
32 111
27 106
22 101
17 96
12 91
86
n/a 81
76
3" Pipe
Model
060 080
137 118
132 113
127 108
122 103
117 98
112 93
107 88
102 83
97 78
92 73
3" Pipe
Model
060 080
121 114
116 109
111 104
106 99
101 94
96 89
91 84
86 79
81 74
76 69