Lennox SLP98UHV Installation Instructions Manual page 15

*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.
Number Of
90° Elbows
Used
070
1 91
2 86
3 81
4 76
5 71
6 66
7 61
8 56
9 51
10 46
Number Of
90° Elbows
Used
070
1 66
2 61
3 56
4 51
5 46
6 41
7 36
8 31
9 26
10 21
Number Of
90° Ebows
Used
070
1 83
2 78
3 73
4 68
5 63
6 58
7 53
8 48
9 43
10 38
Number Of
90° Elbows
Used
070
1 58
2 53
3 48
4 43
5 38
6 33
7 28
8 23
9 18
10 13
Maximum Allowable Intake or Exhaust Vent Length in Feet
Standard Termination at Elevation 0 − 7500'
2" Pipe
Model
090 110 135
69 14
64 9
59
54
49
n/a
44
n/a
39
34
29
24
Standard Termination at Elevation 7501' − 10,000'
2" Pipe
Model
090 110 135
44
39
34
29
24
n/a n/a
19
14
n/a
Concentric Termination at Elevation 0 − 7500'
2" Pipe
Mode
090 110 135
67 12
62 7
57
52
47
n/a
42
n/a
37
32
27
22
Concentric Termination at Elevation 7501' − 10,000'
2" Pipe
Model
090 110 135
42
37
32
27
22
n/a n/a
17
12
n/a
TABLE 5
2−1/2" Pipe
Model
070 090 110
140 93 43
135 88 38
130 83 33
125 78 28
120 73 23
115 68 18
110 63 13
105 58
100 53
n/a
95 48
2−1/2" Pipe
Model
070 090 110
115 68
110 63
105 58
100 53
95 48
n/a
90 43
85 38
80 33
75 28
70 23
2−1/2" Pipe
Model
070 090 110
130 89 39
125 84 34
120 79 29
115 74 24
110 69 19
105 64 14
100 59
95 54
n/a
90 49
85 44
2−1/2" Pipe
Model
070 090 110
105 64
100 59
95 54
90 49
85 44
n/a
80 39
75 34
70 29
65 24
60 19
Page 15
3" Pipe
Model
135 070 090
162 143
157 138
152 133
147 128
142 123
n/a
137 118
132 113
127 108
122 103
117 98
3" Pipe
Model
135 070 090
137 118
132 113
127 108
122 103
117 98
n/a
112 93
107 88
102 83
97 78
92 73
3" Pipe
Model
135 070 090
146 139
141 134
136 129
131 124
126 119
n/a
121 114
116 109
111 104
106 99
101 94
3" Pipe
Model
135 070 090
121 114
116 109
111 104
106 99
101 94
n/a
96 89
91 84
86 79
81 74
76 69
110 135
118 114
113 109
108 104
103 99
98 94
93 89
88 84
83 79
78 74
73 69
110 135
93 89
88 84
83 79
78 74
73 69
68 64
63 59
58 54
53 49
48 44
110 135
114 105
109 100
104 95
99 90
94 85
89 80
84 75
79 70
74 65
69 60
110 135
89 80
84 75
79 70
74 65
69 60
64 55
59 50
54 45
49 40
44 35