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h. Do not locate the exhaust directly under roof overhangs to prevent icicles from forming.
i. Provide 4 feet clearance from the inside corner of vertical walls, chimneys, etc., as well as
horizontal corners created by roof overhangs.
2. DETERMINE AIR INTAKE VENT LOCATION
a. Provide 1 foot clearance from the bottom of the intake air vent and the level of maximum snow
accumulation. Snow removal may be necessary to maintain clearances.
b. Do not locate intake air vent in a parking area where machinery may damage the pipe.
c. When venting with a two pipe system, maximum distance between intake air vent and exhaust
vent is 6 feet (1.8 m). Minimum distance between exhaust vent and intake air vent on single water
heater is 10” (0.255 m) center-to-center. Minimum distance between exhaust vents and intake air
vents on multiple water heaters is 10” (0.255 m) center-to-center.
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