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
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6.5.17 Determining Location of Vertical Termination
Locate the vertical vent/air terminations using the following guidelines:
1.
The total length of piping for vent or air must not exceed the limits given in the Section 6.3.
2.
The vent must terminate at least 3 feet above the highest place in which the vent penetrates
the roof and at least 2 feet above any part of a building within 10 horizontal feet.
3.
The vent must terminate in a tee or acceptable rain-cap.
4.
The air piping must terminate in a down-turned 180° return pipe no further than 2 feet from
the center of the vent pipe. This placement avoids recirculation of flue products into the
combustion air stream
5.
The vent piping must terminate at least 1 foot above the air intake. The air inlet pipe and
vent pipe can be located in any desired position on the roof, but must always be no further
than 2 feet apart and with the vent termination at least 1 foot above the air intake.
6.
Locate terminations so they are not likely to be damaged by foreign objects, such as stones
or balls, or subject to buildup of leaves or sediment.
Figure 6-11: Vertical Vent Termination
