Lennox EL296DF070XV48B - Page 45

Page 45
TABLE 21 CONT.
Maximum Allowable Intake or Exhaust Vent Length
Size intake and exhaust pipe length separately. Values in table are for Intake OR Exhaust, not combined total. Intake and Exhaust must be same 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.
Concentric Termination at Elevation 0 - 4500 ft
Number
Of 90°
Elbows
Used
1-1/2” Pipe 2” Pipe 2-1/2” Pipe 3” Pipe
Model Model Model Model
045 070 090 110 045 070 090 110 045 070 090 110 045 070 090 110
1 15 10
n/a n/a
63 48 32 12 95 95 79 44 111 111 104 104
2 10
n/a
58 43 27 7 90 90 74 39 106 106 99 99
3
n/a
53 38 22 2 85 85 69 34 101 101 94 94
4 48 33 17
n/a
80 80 64 29 96 96 89 89
5 43 28 12 75 75 59 24 91 91 84 84
6 38 23 7 70 70 54 19 86 86 79 79
7 33 18 2 65 65 49 14 81 81 74 74
8 28 13
n/a
60 60 44 9 76 76 69 69
9 23 8 55 55 39 4 71 71 64 64
10 18 3 50 50 34 n/a 66 66 59 59
Concentric Termination Elevation 4501 - 10,000 ft
Number
Of 90°
Elbows
Used
1-1/2” Pipe 2” Pipe 2-1/2” Pipe 3” Pipe
Model Model Model Model
045 070 090 110 045 070 090 110 045 070 090 110 045 070 090 110
1 15 10
n/a n/a
63 48 32
n/a
95 95 79 44 111 111 104 94
2 10
n/a
58 43 27 90 90 74 39 106 106 99 99
3
n/a
53 38 22 85 85 69 34 101 101 94 94
4 48 33 17 80 80 64 29 96 96 89 89
5 43 28 12 75 75 59 24 91 91 84 84
6 38 23 7 70 70 54 19 86 86 79 79
7 33 18 2 65 65 49 14 81 81 74 74
8 28 13
n/a
60 60 44 9 76 76 69 69
9 23 8 55 55 39 4 71 71 64 64
10 18 3 50 50 34 n/a 66 66 59 59