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This device should be installed in accordance with the National Fuel Gas Code ANSI Z223.1 (See
Requirements Below) and any local codes which are applicable. All individual or multiple appliance vents
must enter the vent system on the inlet side of the venter.
1. The exit terminals of mechanical draft systems shall be not less than 7' above grade when located
adjacent to public walkways.
2. A venting system shall terminate at least 3' above any forced air inlet located within 10'.
3. The venting system of other than a direct vent appliance shall terminate at least 4' below, 4' horizontally
from, or 1' above any door, window, or gravity air inlet into any building.
4. The vent termination of a direct vent appliance with an input of 50,000 BTU per hour or less shall be
located at least 9" from any opening through which vent gases could enter a building, and such an
appliance with an input over 50,000 BTU per hour shall require a 12" vent termination clearance. The
bottom of the vent terminal and any air intake shall be located at least 12" above grade.
5. Power venter should be located as close as possible to the outside wall. Forced draft systems and
all portions of induced draft systems under positive pressure during operation shall be designed and
installed so as to prevent leakage of vent gases into building.
6. The vent termination point shall not be installed closer than 3' from an inside corner of an L-shaped
structure, or not less than 12" above grade.
7. For proper ventilation and for reduction of combustion hazards, Class B type vent pipe is recommended
for gas appliances and Class L type vent pipe for oil appliances.
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