AM Series Boiler & Water Heater User Manual
CHAPTER 6: INSTALL
– VENT & COMBUSTION AIR PIPING
OMM-0100_E
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GF-146
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11/15/2019
Technical Support
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(800) 526-0288
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Figure 6-6: Separate Air Intake and Vent Pipes Sidewall Termination
6.5.12 Sidewall Termination and Fittings
Ensure the following when installing through sidewalls:
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The air termination coupling must be oriented at least 12 inches above grade or snow line
as shown in Figure 6-5.
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Maintain the required dimensions of the finished termination piping shown in Figure 6-5.
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Do not extend exposed vent pipe outside of the building more than what is shown in
Figure 6-5. Condensate could freeze and block vent pipe.
6.5.13 Multiple Vent and Air Terminations
When installing multiple air and vent terminations, ensure the following:
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Terminate each vent/air connection as shown in Figure 6-7.
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All vent pipes and air inlets must terminate at the same height.
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Place wall penetrations to obtain minimum clearance of 12 inches between edge of air
inlet and adjacent vent outlet, as shown in Figure 6-7 for U.S. installations. For Canadian
installations, provide clearances required by CSA B149.1 Installation Code.
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The air inlet is part of a direct vent connection. It is not classified as a forced air intake
with regard to spacing from adjacent appliance vents.
