Lennox EL296DFV Installation Instructions Manual page 19

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 size.
NOTE - Additional vent pipe and elbows used to terminate the vent pipe outside the structure must be included in the total vent length calculation.
Number Of
90° Elbows
Used
045
1 71
2 66
3 61
4 56
5 51
6 46
7 41
8 36
9 31
10 26
Number Of
90° Elbows
Used
045
1 71
2 66
3 61
4 56
5 51
6 46
7 41
8 36
9 31
10 26
Number Of 90°
Elbows Used
045
1 63
2 58
3 53
4 48
5 43
6 38
7 33
8 28
9 23
10 18
Number Of 90°
Elbows Used
045
1 63
2 58
3 53
4 48
5 43
6 38
7 33
8 28
9 23
10 18
Maximum Allowable Intake or Exhaust Vent Length
Standard Termination at Elevation 0 - 4500 ft
2" Pipe
Model
070 090 110
56 34 14
51 29 9
46 24 4
41 19 n/a
36 14 n/a
31 9 n/a
26 4 n/a
21 n/a n/a
16 n/a n/a
11 n/a n/a
Standard Termination Elevation 4500 - 10,000 ft
2" Pipe
Model
070 090 110
56 34 n/a
51 29 n/a
46 24 n/a
41 19 n/a
36 14 n/a
31 9 n/a
26 4 n/a
21 n/a n/a
16 n/a n/a
11 n/a n/a
Concentric Termination at Elevation 0 - 4500 ft
2" Pipe
Model
070 090 110
48 32 12
43 27 7
38 22 2
33 17
28 12
23 7
18 2 n/a
13
8 n/a
3
Concentric Termination Elevation 4501 - 10,000 ft
2" Pipe
Model
070 090 110
48 32
43 27
38 22
33 17
28 12
n/a
23 7
18 2
13
8
n/a
3
TABLE 7
2-1/2" Pipe
Model
045 070 090
105 105 83
100 100 78
95 95 73
90 90 68
85 85 63
80 80 58
75 75 53
70 70 48
65 65 43
60 60 38
2-1/2" Pipe
Model
045 070 090
105 105 83
100 100 78
95 95 73
90 90 68
85 85 63
80 80 58
75 75 53
70 70 48
65 65 43
60 60 38
2-1/2" Pipe
Model
045 070 090
95 95 79
90 90 74
85 85 69
80 80 64
75 75 59
70 70 54
65 65 49
60 60 44
55 55 39
50 50 34
2-1/2" Pipe
Model
045 070 090
95 95 79
90 90 74
85 85 69
80 80 64
75 75 59
70 70 54
65 65 49
60 60 44
55 55 39
50 50 34
Page 19
3" Pipe
Model
110 045 070
48 128 127
43 123 122
38 118 117
33 113 112
28 108 107
23 101 102
18 98 97
13 93 92
8 88 87
3 83 82
3" Pipe
Model
110 045 070
48 128 127
43 123 122
38 118 117
33 113 112
28 108 107
23 103 102
18 98 97
13 93 92
8 88 87
3 83 82
3" Pipe
Model
110 045 070
44 111 111
39 106 106
34 101 91
29 96 96
24 91 91
19 96 86
14 81 81
9 76 76
4 71 71
n/a 66 66
3" Pipe
Model
110 045 070
44 111 111
39 106 106
34 101 101
29 96 96
24 91 91
19 86 86
14 81 81
9 76 76
4 71 71
n/a 66 66
090 110
108 108
103 103
98 98
93 93
88 88
83 83
78 78
73 73
68 68
63 63
090 110
108 108
103 103
98 98
93 93
88 88
83 83
78 78
73 73
68 68
63 63
090 110
104 104
99 99
94 94
89 89
84 84
79 79
74 74
69 69
64 64
59 59
090 110
104 94
99 99
94 94
89 89
84 84
79 79
74 74
69 69
64 64
59 59