Lennox EL196UH030XE24B Information page 27

Maximum Allowable Exhaust Vent Lengths With Furnace Installed in a Closet or Basement Using Ventilated
NOTE - Additional vent pipe and elbows used to terminate the vent pipe outside the structure must be included in the total vent length calculation.
1-1/2" Pipe
Number
Model
Of 90°
Elbows
Used
030 045 070
1 20 15 10
2 15 10
3 10
4
5
6 n/a
n/a
7 n/a
8
9
10
1-1/2 Pipe
Number
Model
Of 90°
Elbows
Used
030 045 070
1 20 15 10
2 15 10
3 10
4
5
6 n/a
n/a
7
n/a
8
9
10
Attic or Crawl Space For Intake Air in Feet
Standard Termination at Elevation 0 - 4500 ft
2" Pipe
Model
030
090 110 070
045
71 56
66 51
61 46
56 41
51 36
n/a n/a
46 31
41 26
36 21
31 16
26 11
Standard Termination Elevation 4500 - 10,000 ft
2" Pipe
Model
030
090 110 070
045
71 56
66 51
61 46
56 41
51 36
n/a n/a
46 31
41 26
36 21
31 16
26 11
TABLE 14
2-1/2" Pipe
Model
030
090 110 070
045
34 14 100 100
29 9 95 95
24 4 90 90
19 85 85
14 80 80
9 85 75
4 n/a 70 70
65 65
60 60
n/a
55 55
2-1/2" Pipe
Model
030
090 110 070
045
34 100 100
29 95 95
24 90 90
19 85 85
14 80 80
n/a
9 85 85
4 70 70
65 65
n/a 60 60
55 55
Page 27
3" Pipe
Model
030
090 110 070
045
78 43 118 117
73 38 113 112
68 33 108 107
63 28 103 102
58 23 98 97
63 18 93 92
48 13 88 87
43 8 83 82
38 3 78 77
33 n/a 73 72
3" Pipe
Model
030
090 110 070
045
78 43 118 117
73 38 113 112
68 33 118 107
63 28 113 102
58 23 98 97
53 18 93 92
48 13 98 87
43 8 93 82
38 3 78 77
33 n/a 73 72
090 110
98 98
93 93
88 88
83 83
78 78
73 73
68 68
63 63
58 58
53 53
090 110
98 98
93 93
88 88
83 83
78 78
73 73
68 68
63 63
58 58
53 53