Lennox 95G2UHV Installation Instructions Manual page 20

1-1/2" Pipe
Number
of 90°
Capacity
Elbows
Used 45 70 90
1 20 15
2 15 10
3 10
4
5
n/a
6
n/a
7
n/a
8
9
10
1-1/2" Pipe
Number
of 90°
Capacity
Elbows
Used
45 70 90
1 20 15
2 15 10
3 10
4
5
n/a
6
n/a
7 n/a
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 20 of 58
Maximum Allowable Intake or Exhaust Vent Length in Feet
Concentric Termination at Elevation 0 - 4,500 ft
2" Pipe
Capacity
110 135 45 70 90
68 53 37
63 48 32
58 43 27
53 38 22
48 33 17
n/a n/a
43 28 12
38 23 7
33 18
28 13
n/a
23 8
Concentric Termination Elevation 4,501 - 10,000 ft
2" Pipe
Capacity
110 135 45 70 90
68 53 37
63 48 32
58 43 27
53 38 22
48 33 17
n/a n/a
43 28 12
38 23 7
33 18
28 13 n/a
23 8
2-1/2" Pipe
Capacity
110 135 45 70 90
17 100 100 84
12 95 95 79
7 90 90 74
85 85 69
80 80 64
n/a
75 75 59
70 70 54
n/a
65 65 49
60 60 44
55 55 39
2-1/2" Pipe
Capacity
110 135 45 70 90
100 100 84
95 95 79
90 90 74
85 85 69
80 80 64
n/a n/a
75 75 59
70 70 54
65 65 49
60 60 44
55 55 39
Table 5B.
Issue 1933
3" Pipe
Capacity
110 135 45 70 90
49 116 116 109
44 111 111 104
39 106 106 99
34 101 101 94
29 96 96 89
n/a
24 91 91 84
19 86 86 79
14 81 81 74
9 76 76 69
n/a 71 71 64
3" Pipe
Capacity
110 135 45 70 90
49 116 116 109
44 111 111 104
39 106 106 99
34 101 101 94
29 96 96 89
n/a
24 91 91 84
19 86 86 79
14 81 81 74
9 76 76 69
n/a 71 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
109 100
104 95
99 90
94 85
89 80
84 75
79 70
74 65
69 60
64 55
507266-05