22
Venting (Part II) continued-
TABLE 7
2” (5.1 cm) VENT PIPE LENGTHS FROM INSIDE WALL FOR LOW
GROUND CLEARANCE INSTALLATIONS
Terminating #
of
Elbows
Max straight
Length ft (m)
Min straight
Length ft (m)
(2) 90
°
Elbows with Vent Terminal
1 45
(13.7)
2
(.6)
(2) 90
°
Elbows with Vent Terminal
2 40
(12.2)
2
(.6)
(2) 90
°
Elbows with Vent Terminal
3 35
(10.7)
2
(.6)
(2) 90
°
Elbows with Vent Terminal
4 30
(9.2)
2
(.6)
TABLE 8
3” (7.6 cm) VENT CONNECTOR LENGTHS FROM INSIDE WALL FOR
LOW GROUND CLEARANCE INSTALLATIONS
Terminating (Reduce 3” to 2”)
(Reduce 7.6 cm to 5.1 cm)
#of
Elbows
Maximum
Length ft (m)
Minimum
Length ft (m)
(2) 90
°
Elbows with Vent Terminal
1 115
(
35.1)
10
(3.1)
(2) 90
°
Elbows with Vent Terminal
2 110
(33.5)
10
(3.1)
(2) 90
°
Elbows with Vent Terminal
3 105
(
32)
10
(3.1)
(2) 90
°
Elbows with Vent Terminal
4 100
(30.5)
10
(3.1)
(2) 90
°
Elbows with Vent Terminal
5 95
(29)
10
(3.1)
HIGH ALTITUDE INSTALLATIONS FOR ELEVATIONS OVER 2,500
FEET (610 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.
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