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INLET/OUTLET VENT TERMINATIONS (100,000 - 150,000 BTU/HR)
Standard Horizontal Termination
When 3 inch pipe is used between the water heater and the
outside wall, reduce it to 2 inch pipe before penetrating the
wall. A maximum of 18 inches of 2 inch pipe may be used
between the 3 inch transition and the inside of the wall (see
figure 7A).
The standard horizontal air inlet termination is a 2 inch
pipe which terminates at the exterior wall and utilizes a
coupling to prevent the pipe from being pushed back into the
structure. The standard horizontal exhaust outlet termination
is a 2 inch pipe which terminates 12 inches from the outside
wall. The air inlet must be located with respect to the exhaust
outlet as shown in figure 7A (bottom).
Install a drain tee assembly and trap in the inlet vent as
close to the water heater as possible. This is to drain any
water that may be in the combustion air pipe and prevent
it from entering the blower. Connect the trap drain line to a
suitable drain or downstream of the condensate trap of the
water heater.
Note: See “Venting Additional Polaris® Units” on Page 10
for correct terminations if installing more than one Polaris®
gas water heater.
Alternative Horizontal Termination
The combustion air and exhaust terminations may be raised
up to 24 inches above the wall penetrations if required for
anticipated snow levels (see figure 8A). The two elbows
shown in figure 8A are considered part of the termination
and should not be included when determining the maximum
allowable vent pipe length.
Note: See “Venting Additional Polaris® Units” on Page 10
for correct terminations if installing more than one Polaris®
gas water heater.
Figure 7A: Standard Horizontal Termination (100,000 - 150,000 BTU/Hr Models)
Figure 8A: Alternate Horizontal Termination
(100,000 - 150,000 BTU/Hr Input Models)