Lennox EL296DFV Series Unit Information page 45

Size intake and exhaust pipe length separately. Values in table are for Intake OR Exhaust, not combined total. 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 1-1/2" Pipe
Of 90°
Model
Elbows
045 070
Used
1 15 10
2 10
3
4
5
6 n/a
n/a
7
8
9
10
Number 1-1/2" Pipe
Of 90°
Model
Elbows
045 070
Used
1 15 10
2 10
3
4
5
6
n/a
n/a
7
8
9
10
Maximum Allowable Intake or Exhaust Vent Length
Concentric Termination at Elevation 0 - 4500 ft
2" Pipe
Model
090 110 045 070
63 48
58 43
53 38
48 33
43 28
n/a n/a
38 23
33 18
28 13
23 8
18 3
Concentric Termination Elevation 4501 - 10,000 ft
2" Pipe
Model
090 110 045 070
63 48
58 43
53 38
48 33
43 28
n/a n/a
38 23
33 18
28 13
23 8
18 3
TABLE 21 CONT.
2-1/2" Pipe
090 110 045 070
32 12 95 95
27 7 90 90
22 2 85 85
17 80 80
12 75 75
7 70 70
2 n/a 65 65
60 60
n/a 55 55
50 50
2-1/2" Pipe
090 110 045 070
32 95 95
27 90 90
22 85 85
17 80 80
12 75 75
n/a
7 70 70
2 65 65
60 60
n/a 55 55
50 50
Page 45
Model
090 110 045
79 44 111
74 39 106
69 34 101
64 29 96
59 24 91
54 19 86
49 14 81
44 9 76
39 4 71
34 n/a 66
Model
090 110 045
79 44 111
74 39 106
69 34 101
64 29 96
59 24 91
54 19 86
49 14 81
44 9 76
39 4 71
34 n/a 66
3" Pipe
Model
070 090 110
111 104 104
106 99 99
101 94 94
96 89 89
91 84 84
86 79 79
81 74 74
76 69 69
71 64 64
66 59 59
3" Pipe
Model
070 090 110
111 104 94
106 99 99
101 94 94
96 89 89
91 84 84
86 79 79
81 74 74
76 69 69
71 64 64
66 59 59