Lennox A98USMV Installation Instructions Manual page 18

1-1/2" Pipe
Number of
Model
90° Elbows
Used
070 090
1 15
2 10
3
4
5
n/a
6
n/a
7
8
9
10
1-1/2" Pipe
Number of
Model
90° Elbows
Used
070 090
1 10
2
3
4
5
n/a
6 n/a
7
8
9
10
*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.
Page 18 of 74
Maximum Allowable Intake or Exhaust Vent Length (feet)
Concentric Termination at Elevation 0 - 4,500 ft
2" Pipe
Model
110 135 070 090
78 62
73 57
68 52
63 47
58 42
n/a n/a
53 37
48 32
43 27
38 22
33 17
Concentric Termination at Elevation 4,501 - 10,000 ft
2" Pipe
Model
110 135 070 090
53 37
48 32
43 27
38 22
33 17
n/a n/a
28 12
23 7
18
13 n/a
8
2-1/2" Pipe
Model
110 135 070 090
125 84
120 79
115 74
110 69
105 64
n/a n/a
100 59
95 54
90 49
85 44
80 39
2-1/2" Pipe
Model
110 135 070 090
100 59
95 54
90 49
85 44
80 39
n/a n/a
75 34
70 29
65 24
60 19
55 14
Table 6B.
Issue 2346
3" Pipe
Model
110 135 070 090
34 141 134
29 136 129
24 131 124
19 126 119
14 121 114
n/a
9 116 109
111 104
106 99
n/a
101 94
96 89
3" Pipe
Model
110 135 070 090
116 109
111 104
106 99
101 94
96 89
n/a n/a
91 84
86 79
81 74
76 69
71 64
110 135
109 100
104 95
99 90
94 85
89 80
84 75
79 70
74 65
69 60
64 55
110 135
84 75
79 70
74 65
69 60
64 55
59 50
54 45
49 40
44 35
39 30
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