Exhaust And Intake Air Vent Pipe Location; Determine Exhaust Vent Location; Determine Air Intake Vent Location - Pioneer PHR100-55 Instruction Manual

C. EXHAUST AND INTAKE AIR VENT PIPE LOCATION

1. DETERMINE EXHAUST VENT LOCATION

Both exhaust and intake air vents must exit from the same side of the building to assure correct appliance
operation.
a. The vent piping for this water heater is approved for zero clearance to combustible
construction.
b. See illustration within this section of clearances for location of exit terminals of direct-vent
venting systems.
c. This water heater vent system shall terminate at least 3 feet (0.9 m) above any forced air intake
located within 10 ft (3 m). Note: this does not apply to the combustion air intake of a direct-vent
appliance.
d. Provide a minimum of 1 foot distance from any door, operable window, or gravity intake into
any building.
e. Provide a minimum of 1 foot clearance from the bottom of the exhaust above the expected
snow accumulation level. Snow removal may be necessary to maintain clearance.
f. Provide 4 feet horizontal clearance from electrical meters, gas meters, gas regulators, relief
equipment, exhaust fans and inlets. In no case shall the exit terminal be above or below the
aforementioned equipment unless the 4 foot horizontal distance is maintained.
g. When adjacent to a public walkway, locate exit terminal at least 7 feet above grade.
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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