Lennox ELITE EL296V Installation Instructions Manual page 20

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
045 070 090
Used
15 10
1
10
2
3
4
5
n/a
n/a
6
n/a
7
8
9
10
Number 1-1/2" Pipe
Of 90°
Model
Elbows
045 070 090
Used
15 10
1
10
2
3
4
5
n/a
n/a
6
n/a
7
8
9
10
Maximum Allowable Exhaust Vent Length Using Ventilated Attic or Crawl Space For Intake Air in Feet
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
Of 90°
Model
Elbows
045 070 090
Used
15 10
1
10
2
3
4
5
n/a
n/a
6
n/a
7
8
9
10
TABLE 7 CONT.
Maximum Allowable Intake or Exhaust Vent Length
Concentric Termination at Elevation 0 - 4500 ft
2" Pipe
Model
110 045 070 090
63 48 32
58 43 27
53 38 22
48 33 17
43 28 12
n/a
38 23 7
33 18 2
28 13
23 8 n/a
18 3
Concentric Termination Elevation 4501 - 10,000 ft
2" Pipe
Model
110 045 070 090
63 48 32
58 43 27
53 38 22
48 33 17
43 28 12
n/a
38 23 7
33 18 2
28 13
23 8 n/a
18 3
TABLE 8
Standard Termination at Elevation 0 - 10,000 ft
2" Pipe
Model
110 045 070 090
61 46 24
56 41 19
51 36 14
46 31 9
41 26 4
n/a
36 21
31 16
26 11 n/a
21 6
16 1
2-1/2" Pipe
Model
110 045 070
12 95 95
7 90 90
2 85 85
80 80
75 75
70 70
n/a 65 65
60 60
55 55
50 50
2-1/2" Pipe
Model
110 045 070
95 95
90 90
85 85
80 80
75 75
n/a
70 70
65 65
60 60
55 55
50 50
2-1/2" Pipe
Model
110 045 070
90 90
85 85
80 80
75 75
70 70
n/a
65 65
60 60
55 55
50 50
45 45
Page 20
3" Pipe
Model
090 110 045 070
79 44 111 111
74 39 106 106
69 34 101 101
64 29 96 96
59 24 91 91
54 19 86 86
49 14 81 81
44 9 76 76
39 4 71 71
34 n/a 66 66
3" Pipe
Model
090 110 045 070
79 44 111 111
74 39 106 106
69 34 101 101
64 29 96 96
59 24 91 91
54 19 86 86
49 14 81 81
44 9 76 76
39 4 71 71
34 n/a 66 66
3" Pipe
Model
090 110 045 070
68 33 108 107
63 28 103 102
58 23 98 97
53 18 93 92
48 13 88 87
43 8 81 82
38 3 78 77
33 73 72
28 n/a 68 67
23 63 62
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
090 110
88 88
83 83
78 78
73 73
68 68
63 63
58 58
53 53
48 48
43 43