Lennox SIGNATURE SLP99DFV User Manual

Page 18
TABLE 8
Maximum Allowable Intake or Exhaust Vent Length in Feet
*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.
Concentric Termination at Elevation 0 - 4500’
Number
Of 90

Elbows
Used
1-1/2” Pipe 2” Pipe 2-1/2” Pipe 3” Pipe
Model Model Model Model
070 090 110 070 090 110 070 090 110 070 090 110
1 10
N/A N/A
83 67 12 130 89 39 146 139 114
2
N/A
78 62 7 125 84 34 141 134 109
3 73 57
N/A
120 79 29 136 129 104
4 68 52 115 74 24 131 124 99
5 63 47 110 69 19 126 119 94
6 58 42 105 64 14 121 114 89
7 53 37 100 59
N/A
116 109 84
8 48 32 95 54 111 104 79
9 43 27 90 49 106 99 74
10 38 22 85 44 101 94 69
Concentric Termination at Elevation 4501’ - 7500’
Number
of 90
Elbows
Used
1-1/2” Pipe 2” Pipe 2-1/2” Pipe 3” Pipe
Model Model Model Model
070 090 110 070 090 110 070 090 110 070 090 110
1
N/A N/A N/A
58 67
12
105 89
39
121 114 114
2 53 62 100 84 116 109 109
7 34
3 48 57 95 79 111 104 104
N/A
29
4 43 52 90 74 106 99 99
24
5 38 47 85 69 19 101 94 94
6 33 42 80 64
14
96 89 89
7 28 37 75 59 91 84 84
N/A
8 23
32
70 54 86 79 79
27
9 18 65 49 81 74 74
22
10 13 60 44 76 69 69
Concentric Termination 7501’ - 10,000”
Number
of 90
Elbows
Used
1-1/2” Pipe 2” Pipe 2-1/2” Pipe 3” Pipe
Model Model Model Model
070 090 110 070 090 110 070 090 110 070 090 110
1
N/A N/A N/A
33 42
N/A
80 64
N/A
96 114 89
2 28 37 75 59 91 109 84
3 23 32 70 54 86 104 79
4 18 27 65 49 81 99 74
5 13 22 60 44 76 94 69
6
N/A
17 55 39 71 89 64
7 12 50 34 66 84 59
8
N/A
45 29 61 79 54
9 40 24 56 74 49
10 35 19 51 69 44

Lennox SIGNATURE SLP99DFV Specifications

General

Brand	Lennox
Model	SIGNATURE SLP99DFV
Category	Furnace
Language	English