Bradford-White Corp 238-47707-00E REV 7/12 Through the Wall Venting With Low Ground Clearance

Figure 7C

Through the Wall Venting With Low Ground Clearance:

When venting cannot exit through the wall at a height greater than or equal to 12” (30.5 cm) (and above expected snow level) from the ground, then the installation must be modified as shown below (see Figure 8). Refer to Tables 3 or 4 for maximum venting lengths using 3” (7.6 cm) or 4” (10.2 cm) diameter pipe.

Figure 8

TABLE 3

3” (7.6 cm) EXHAUST VENT OR COMBUSTION AIR INTAKE PIPE LENGTHS FROM INSIDE WALL

FOR LOW GROUND CLEARANCE INSTALLATIONS

Termination		# of Elbows	Maximum Length
(2) 90° Elbows with (1) 90° Elbow	1		30 ft (9.1 m)
(2) 90° Elbows with (1) 90° Elbow	2		25 ft (7.6 m)
(2) 90° Elbows with (1) 90° Elbow	3		20 ft (6.1 m)
(2) 90° Elbows with (1) 90° Elbow		4	15 ft (4.6 m)

TABLE 4

4” (10.2 cm) EXHAUST VENT OR COMBUSTION AIR INTAKE PIPE LENGTHS FROM INSIDE WALL

FOR LOW GROUND CLEARANCE INSTALLATIONS

Termination		# of Elbows	Maximum Length
(2) 90° Elbows with (1) 90° Elbow		1	45 ft (13.7 m)
(2) 90° Elbows with (1) 90° Elbow		2	40 ft (12.2 m)
(2) 90° Elbows with (1) 90° Elbow		3	35 ft (10.7 m)
(2) 90° Elbows with (1) 90° Elbow		4	30 ft (9.1 m)
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