Lennox ELITE Series Installation Instructions Manual page 19

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
No Of 1-1/2" Pipe
90°
Model
Elbows
045 070 090
Used
1 25 20
2 20 15
3 15 10
4 10
5
n/a
6
7 n/a
n/a
8
9
10
No Of 1-1/2" Pipe
90°
Model
Elbows
045 070 090
Usedl
1 25 20
2 20 15
3 15 10
4 10
5
n/a
6
7 n/a
n/a
8
9
10
See concentric terminations next page.
Maximum Allowable Intake or Exhaust Vent Length in Feet
Standard Termination at Elevation 0 - 4500 ft
2" Pipe
Model
110 135 045 070 090
81 66 44
76 61 39
71 56 34
66 51 29
61 46 24
n/a n/a
56 41 19
51 36 14
46 31
41 26 n/a
36 21
Standard Termination Elevation 4500 - 10,000 ft
2" Pipe
Model
110 135 045 070 090
81 66 44
76 61 39
71 56 34
66 51 29
61 46 24
n/a n/a
56 41 19
51 36 14
46 31
41 26 n/a
36 21
TABLE 5
2-1/2" Pipe
Model
110 135 045 070 090
22 115 115 93
19 110 110 88
14 105 105 83
100 100 78
95 95 73
n/a
90 90 68
n/a 85 85 63
80 80 58
75 75 53
70 70 48
2-1/2" Pipe
Model
110 135 045 070 090
115 115 93
110 110 88
105 105 83
100 100 78
95 96 73
n/a n/a
90 90 68
85 85 63
80 80 58
75 75 53
70 70 48
Page 19
3" Pipe
Model
110 135 045 070 090 110 135
58 138 137 118 118 114
53 133 132 113 113 109
48 128 127 108 108 104
43 123 122 103 103
38 118 117 98
n/a
33 113 112 93
28 108 107 88
23 103 102 83
18 98 97 78
13 93 92 73
3" Pipe
Model
110 135 045 070 090 110 135
58 138 137 118 118 114
53 133 132 113 113 109
48 128 127 108 108 104
43 123 122 103 103
38 118 117 98
n/a
33 113 112 93
28 108 107 88
23 103 102 83
18 98 97 78
13 93 92 73
99
98 94
93 89
88 84
83 79
78 74
73 69
99
98 94
93 89
88 84
83 79
78 74
73 69