Bradford White PDX Series Service Manual page 8

PDX Series
Part II-Venting Specifications for:
40 Gallon
50 Gallon
The minimum equivalent length for the exhaust portion of the vent is 7 feet. The maximum equivalent vent length for the exhaust is 35 feet
for 2" diameter pipe and 85 feet for 3" diameter pipe. The intake portion of the vent must be equal to or less than the vent length of the
exhaust. The tables below are provided for your quick reference, some installations may require a greater number of elbows. When
calculating equivalent vent length, one 90° elbow is equivalent to 5 feet.
VENT CONNECTOR LENGTHS FOR 2" (5.1 cm) DIAMETER VENT PIPE
Terminating
Through the Wall
Through the Wall
Through the Wall
Through the Wall
Through the Roof
Through the Roof
Through the Roof
Through the Roof
VENT CONNECTOR LENGTHS FOR 3" (7.6 cm) DIAMETER VENT PIPE
Terminating
Through the Wall
Through the Wall
Through the Wall
Through the Wall
Through the Roof
Through the Roof
Through the Roof
Through the Roof
Through the Roof
Through the Roof
8
Vent Tables
IMPORTANT
# of
Maximum
Elbows
straight
(excl. vent
Length ft (m)
term.)
30 (9.1)
1
25 (7.6)
2
20 (6.1)
3
15 (4.6)
4
35 (9.1)
0
30 (9.1)
1
25 (7.6)
2
20 (6.1)
3
# of
Maximum
Elbows
straight
(excl. vent
Length ft (m)
term.)
80 (24.4)
1
75 (22.9)
2
70 (21.3)
3
65 (19.8)
4
60 (18.3)
5
85 (29.9)
0
80 (24.4)
1
75 (22.9)
2
70 (22.3)
3
65 (19.8)
4
Specifications
Minimum
straight
Length ft (m)
2 (.6)
2 (.6)
2 (.6)
2 (.6)
7 (2.1)
7 (2.1)
7 (2.1)
7 (2.1)
Maximum
straight
Length ft (m)
10 (3.1)
10 (3.1)
10 (3.1)
10 (3.1)
10 (3.1)
15 (4.6)
15 (4.6)
15 (4.6)
15 (4.6)
15 (4.6)
Page 8