McGiever wrote:About that 12" above ground statement...might that refer to min. height of where powervent terminates above outside grade???
Yes, letter g below. What is the reason for all these restrictions? Is the exhaust gas flammable?
a. The exit termination of mechanical draft systems shall not be less than 7' above grade when located adjacent to public walkways.
b. A venting system shall terminate at least 3' above any forced air inlet located within 10'.
c. 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 the building. When venting oil fired equipment with a Field Control's CAS-2 series Airboot® kit, the intake air hood can be mounted within 12 inches of the power venter exhaust.
d. The vent termination of a direct vent appliance with an in put of 50,000 BTUs per hour or less shall be located at least 9" from any opening through which vented gases could enter the building. With an input over 50,000 BTUs per hour, a 12" termination clearance shall be required.
e. The vent termination point shall not be installed closer than 3' from an inside corner of an L-shaped structure.
f. The vent termination should not be mounted directly above, or within 3' horizontally from an oil tank vent or gas meter.
g. The bottom of the vent terminal shall be located at least 12" above finished grade.