Carrier Performance 59TP5A Series Product Data page 9

MAXIMUM EQUIVALENT VENT LENGTH - - FT. (M) (CONTINUED)
Pipe Diameter (in):
Mitered 90º Elbow
Medium Radius 90º Elbow
Long Radius 90º Elbow
Mitered 45º Elbow
Medium Radius 45º Elbow
Long Radius 45º Elbow
Tee
Concentric Vent Termination
Standard Vent Termination
Venting System Length Calculations
The maximum length for each vent pipe (inlet or exhaust) equals the Maximum Equivalent Vent Length (MEVL) from Table 1 or Table 3
minus the number of elbows multiplied by the deduction for each elbow in Table 2.
Standard vent terminations and concentric vent terminations count for zero deductions.
See Vent Manufacturers' data for equivalent lengths of flexible vent piping.
DO NOT ASSUME that one foot of flexible vent pipe is equivalent to one foot of standard PVC vent pipe.
Example
A direct- -vent 60,000 Btuh furnace installed at 2100 ft. (640 M) with 2- -in.(51 mm) vent piping. Venting system includes, FOR EACH
PIPE, (3) 90_ long radius elbows, (2) 45_ long radius elbows and a concentric vent kit.
Maximum Equivalent Vent Length
Deduct (3) 90 long radius
Deduct (2) 45 long radius
No deduction for Concentric Vent Kit
Maximum Vent Length
Table 2 – Deductions from Maximum Equivalent Vent Length - - Ft. (M)
1-1/2
8 (2.4) 8
5 (1.5) 5
3 (0.9) 3
4 (1.2) 4
2.5 (0.8) 2.5
1.5 (0.5) 1.5
16 (4.9) 16
NA 0
0 (0.0) 0
3 x
2 x
2 2-1/2
(2.4) 8 (2.4)
(1.5) 5 (1.5)
(0.9) 3 (0.9)
(1.2) 4 (1.2)
(0.8) 2.5 (0.8)
(0.5) 1.5 (0.5)
(4.9) 16 (4.9)
(0.0) NA
(0.0) 0 (0.0)
= 127 ft.
3 ft. = - 9 ft.
1.5 ft. = - 3 ft.
0 ft. = - 0 ft.
= 115 ft.
9
3 4
8 (2.4) 8 (2.4)
5 (1.5) 5 (1.5)
3 (0.9) 3 (0.9)
4 (1.2) 4 (1.2)
2.5 (0.8) 2.5 (0.8)
1.5 (0.5) 1.5 (0.5)
16 (4.9) 16 (4.9)
0 (0.0) NA
0 (0.0) 0 (0.0)
(From Table 1)
(From Table 2)
(From Table 2)
(From Table 2)
For EACH vent or inlet pipe