All installations and services must be performed by qualified service personnel.
Figure 8: Typical Relative Locations of Direct Vent Terminations When
Sidewall Venting
3. Exhaust Vent Terminal Location Clearance Requirements
a. The vent terminal shall be located at least 3-feet above any forced air
inlet located within 10-feet. Refer to Figure 9 for a depiction of the
minimum required clearances between vent terminations and building
features according to the National Fuel Gas Code (NFGC).
b. The vent terminal shall be at least 12-inches below, 12-inches
horizontally from, or 12-inches above, any door, window, or gravity air
inlet into a building. The bottom of the vent terminal shall be located at
least 12-inches above grade.
c. The vent terminal shall
not
be located:
•
over public walkways or over an area where wetting of surfaces by
condensate, or water vapor, could create a nuisance or hazard,
•
near soffit vents, crawl space vents, or other areas where
condensate or water vapor could create a nuisance, hazard, or
cause property damage, and
•
where wetting of components by condensate, or water vapor, could
be detrimental to the operation of pressure regulators, relief valves,
or any other equipment.
d. The vent terminal shall be installed a minimum of 14-inches from any
obstruction and 3-feet from an inside corner of an L-shaped structure.
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