Pdx series – Bradford White PDX-75S-70FB-3X User Manual
Page 8
Specifications
Part II-Venting Specifications for:
40 Gallon
50 Gallon
Through the Wall
Terminating
# of
Elbows
(excl. vent
term.)
Maximum
straight
Length ft
(m)
VENT CONNECTOR LENGTHS FOR 2"
(5.1 cm) DIAMETER VENT PIPE
1
30
(9.1)
Through the Wall
2
25
(7.6)
Through the Wall
3
Through the Wall
4
15
(4.6)
Through the Roof
0
35
(10.7)
Through the Roof
1
30
(9.1)
Through the Roof
2
25
(7.6)
Through the Roof
3
20
(6.1)
Vent Tables
Page 8
PDX Series
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)
IMPORTANT
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.
20
(6.1)
Through the Wall
Terminating
# of
Elbows
(excl. vent
term.)
Maximum
straight
Length ft
(m)
VENT CONNECTOR LENGTHS FOR 3"
(7.6 cm) DIAMETER VENT PIPE
1
80
(24.4)
Through the Wall
2
75
(22.9)
Through the Wall
3
Through the Wall
4
65
(19.8)
Through the Roof
5
60
(18.3)
Through the Roof
0
85
(29.9)
Through the Roof
1
80
(24.4)
Through the Roof
2
75
(22.9)
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)
70
(21.3)
Through the Roof
Through the Roof
3
70
(21.3)
65
(19.8)
4
15 (4.6)
15 (4.6)
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