VERTICAL TERMINATIONS (175,000+ BTU/HR)
For inputs of 175,000 BTU/Hr or greater, all termination pip- ing and fittings are 3”. Do not reduce before penetrating the wall.
The vertical inlet air termination requires a return bend or two short or long sweep radius 90° elbows to keep the inlet downward and prevent entry of rain. These elbows are con- sidered part of the termination and should not be included when calculating the maximum allowable vent pipe length. Refer to figure 9B for the proper location of the air inlet with respect to the exhaust outlet termination. The vertical exhaust outlet termination is a 3 inch pipe which terminates at least 12 inches above the inlet air termination.
The air inlet and exhaust outlet terminations must be at least 12 inches above the roof line or anticipated snow levels as shown in figure 9B below.
Note: See “Venting Additional Polaris® Units” below if installing more than one Polaris® gas water heater.
Figure 9B: Vertical Termination (175,000+ BTU/Hr models)
*100 Gallon Model Shown. |
Venting Additional Polaris® Units (175,000+ BTU/Hr Models)
When using two (2) Polaris® units, install vent terminations using either Method A or Method B below:
When using three or more Polaris® units, install vent terminations per Method C or Method D:
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