Lennox ML196UHE 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.
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
No. Of
90° Model
El-
030 045 070 090
bows
1 25 20 15
2 20 15 10
3 15 10
4 10
5
n/a
6
n/a
7 n/a
n/a
8
9
10
1-1/2" Pipe
No. Of
90° Model
El-
030 045 070 090
bows
1 25 20 15
2 20 15 10
3 15 10
4 10
5
n/a
6
n/a
7 n/a
n/a
8
9
10
1 Contact your local FTC if more than 85ft of venting is needed for the ML196UH135XE60D.
Maximum Allowable Intake or Exhaust Vent Length in Feet
Standard Termination at Elevation 0 - 4500 ft
2" Pipe
Model
030/
110 135 070
045
81 66
76 61
71 56
66 51
61 46
n/a n/a
56 41
51 36
46 31
41 26
36 21
Standard Termination Elevation 4500 - 10,000 ft
2" Pipe
Model
030,
110 135 070
045
81 66
76 61
71 56
66 51
61 46
n/a n/a
56 41
51 36
46 31
41 26
36 21
TABLE 5
2-1/2" Pipe
030/,
090 110 135 070
045
44 24 115 115
39 19 110 110
34 14 105 105
29 100 100
24 95 95
n/a
19 90 90
14 n/a 85 85
80 80
n/a 75 75
70 70
2-1/2" Pipe
030,
090 110 135 070
045
44 115 115
39 110 110
34 105 105
29 100 100
24 95 95
n/a n/a
19 90 90
14 85 85
80 80
n/a 75 75
70 70
Page 19
Model
030/,
090 110 135 070
045
93 58 138 137
88 53 133 132
83 48 128 127
78 43 123 122
73 38 118 117
n/a
68 33 113 112
63 28 108 107
58 23 103 102
53 18 98
48 13 93
Model
030,
090 110 135 070
045
93 58 138 137
88 53 133 132
83 48 128 127
78 43 123 122
73 38 118 117
n/a
68 33 113 112
63 28 108 107
58 23 103 102
53 18 98
48 13 93
3" Pipe
Model
090 110 135
1
118 118 80
113 113 75
108 108 70
103 103 65
98 98 60
93 93 55
88 88 50
83 83 45
97 78 78 40
92 73 73 35
3" Pipe
Model
090 110 135
1
118 118 80
113 113 75
108 108 70
103 103 65
98 98 60
93 93 55
88 88 50
83 83 45
97 78 78 40
92 73 73 35