All installations and services must be performed by qualified service personnel.
NOTICE:
If exterior sidewall building materials are subject to degradation from contact with flue gases or
moisture, a minimum 24-inch diameter shield shall be fabricated from stainless steel or UV-resistant
plastic sheet. The protective shield shall be installed around the vent pipe on the outside wall.
2. The exhaust vent termination elbow shall be installed in accordance with these instructions and
any applicable local codes. Refer to Figures
2 and 3 for typical examples of proper terminations.
a. The exhaust vent termination must be installed in the same atmospheric pressure zone (i.e.
on the same wall) as the air intake termination.
b. The bottom edge of the vent termination elbow must be installed at least 12-inches above the
outlet of intake termination elbow.
c. The horizontal distance between the inlet and exhaust terminations should be minimized,
when possible, and should never exceed 24-inches.
d. The vent and intake systems should utilize the same numbers of elbows and approximately
the same length of straight pipe to reach the outside termination.
Figure 3: 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 4 for a depiction of the required minimum 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,
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