Bradford White PDX1-40S6FBN Installation And Operating Instruction Manual page 35

Venting continued-
2" (5.1 cm) VENT CONNECTOR LENGTHS FROM INSIDE WALL FOR
LOW GROUND CLEARANCE INSTALLATIONS
Terminating
(2) 90 Elbows with (1) 90
Elbow
(2) 90 Elbows with (1) 90
Elbow
(2) 90 Elbows with (1) 90
Elbow
3" (7.6 cm) VENT CONNECTOR LENGTHS FROM INSIDE WALL FOR
LOW GROUND CLEARANCE INSTALLATIONS
Terminating (Reduce 4"
to 3") (Reduce 10.1 cm to
7.6 cm)
(2) 90 Elbows with (1) 90
Elbow
(2) 90 Elbows with (1) 90
Elbow
(2) 90 Elbows with (1) 90
Elbow
(2) 90 Elbows with (1) 90
Elbow
(2) 90 Elbows with (1) 90
Elbow
HIGH ALTITUDE INSTALLATIONS FOR ELEVATIONS OVER 2,500
FEET (762 m) ABOVE SEA LEVEL
The capacity of the induced draft blower declines with increasing altitude due to
a reduction in the air density. In order to assure safe and reliable performance
of the water heater, contact the supplier for high altitude kit.
TABLE 7
# of Elbows
(excl. vent
term.)
1
2
3
TABLE 8
# of Elbows
(excl. vent
term.)
1
2
3
4
5
35
Max Straight
Length ft (m)
20 (6.1)
15 (4.6)
10 (3.0)
Max straight
Length ft (m)
40 (12.2)
35 (10.7)
30 (9.1)
25 (7.6)
20 (6.1)
Min straight
Length
ft (m)
5 (1.5)
5 (1.5)
5 (1.5)
Min straight
Length
ft (m)
10 (3.1)
10 (3.1)
10 (3.1)
10 (3.1)
10 (3.1)