Lennox SLP98DFV Installation Instructions Manual page 16

*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 90̊ ̊
Elbows
070 090
Used
1 91 69
2 86 64
3 81 59
4 76 54
5 71 49
6 66 44
7 61 39
8 56 34
9 51 29
10 46 24
Number
of 90̊
Elbows
070 090
Used
1 66 69
2 61 64
3 56 59
4 51 54
5 46 49
6 41 44
7 36 39
8 31 34
29
9 26
10 21 24
Number
of 90̊
Elbows
070 090
Used
1 41 44
2 36 39
3 31 34
4 26 29
5 21 24
6 16 19
7 11 14
8
9 N/A N/A
10
NOTE - Table 7 continued on next page with concentric terminations.
Maximum Allowable Intake or Exhaust Vent Length in Feet
Standard Termination at Elevation 0 - 4500'
2" Pipe
Model
110 135
14
9
N/A
N/A
Standard Termination at Elevation 4501' - 7500'
2" Pipe
Model
110 135
14
9
N/A
N/A
Standard Termination 7501' - 10,000"
2" Pipe
Model
110 135
N/A N/A
TABLE 7
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 93 43
110 88 38
105 83 33
100 78
28
95 73 23
90 68
18
85 63
13
80 58
75 53
70 48
2-1/2" Pipe
Model
070 090 110
90 68
85 63
80 58
75 53
70 48
N/A
65 43
60 38
55 33
50 28
45 23
Page 16
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
137 143
132 138
127 133
122 128
117 123
N/A
112 118
107 113
102 108
97 103
92 98
3" Pipe
Model
135 070 090
112 118
107 113
102 108
97 103
92 98
N/A
87 93
82 88
77 83
72 78
67 73
110 135
118
113
108
103
98
N/A
93
88
83
78
73
110 135
118
113
108
103
98
N/A
93
88
83
78
73
110 135
93
88
83
78
73
N/A
68
63
58
53
48