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Part I - Venting Specifications for:
48 Gallon, 65,000 BTU input (181.7 L, 19.1 kW/Hr)
65 Gallon, 65,000 BTU input (246.1 L, 19.1 kW/Hr)
75 Gallon, 76,000 BTU input (283.9 L, 22.3 kW/Hr)
This water heater is a power vented appliance and is designed to vent its
products of combustion through 3” (7.6 cm) or 4” (10.2 cm) diameter Schedule 40
(solid or cellular core) PVC pipe to the outdoors. This water heater may be
either vented through the wall or vertically through the roof. Use a 3” (7.6 cm) to
4” (10.2 cm) reducer to connect to the vent outlet when using 4” (10.2 cm) PVC.
Apply PVC cement at PVC locations. Table 2 lists the maximum vent lengths for
this water heater using 3” (7.6 cm) PVC. If possible, locate the water heater so
that the venting length and number of elbows are kept to the minimum distance
necessary to reach the outside. If the installation requires venting lengths that
exceed the lengths listed for 3” (7.6 cm) PVC in Table 2, then use 4” (10.2 cm)
PVC for the vent connector. Table 3 lists the venting distances allowed with 4”
(10.2 cm) diameter PVC pipe. When venting with 4” (10.2 cm) PVC, use a 4”
(10.2 cm) to 3” (7.6 cm) reducer to exit through the building wall with 3” (7.6 cm)
PVC. Use the 3” (7.6 cm) vent terminal supplied with the water heater to
terminate on the outside of the building. If the length of 3” (7.6 cm) PVC needed
to go through the wall is greater than 14” (35.5 cm), use 4” (10.2 cm) to go
through the wall and reduce to 3” (7.6 cm) PVC immediately after exiting the
outside wall. Refer to the venting illustrations on the following pages. Make sure
the vent pipe terminal elbow fitting is at least 1” (2.5 cm) away from the edge of
the wall.
TABLE 2 - VENT CONNECTOR LENGTHS
FOR 3” (7.6 cm) DIAMETER PVC
Terminating # of 90° Elbows
(excluding vent
terminal)
Maximum
Length
Minimum
Length
Through the Wall 1 40 ft (12.2 m) 2 ft (.6 m)
Through the Wall 2 35 ft (10.7 m) 3 ft (.9 m)
Through the Wall 3 30 ft (9.1 m) 5 ft (1.5 m)
Through the Wall 4 25 ft (7.6 m) 8 ft (2.4 m)
Through the Roof 1 40 ft (12.2 m) 2 ft (.6 m)
Through the Roof 2 35 ft (10.7 m) 3 ft (.9 m)
Through the Roof 3 30 ft (9.1 m) 5 ft (1.5 m)
Through the Roof 4 25 ft (7.6 m) 8 ft (2.4 m)
Venting (Part I) continued-
INTERNET VERSION FOR REFERENCE ONLY