SYSTEM OPERATION
17
X
R
12” MIN
HEIGHT DIFFERENCE
BETWEEN
INTAKE AND VENT
12” MIN TO ROOF OR HIGHEST
ANTICIPATED SNOW LEVEL
90˚
ELBOWS
12"M IN.A BOVE
HIGH ESTA NTICIPATED
SNOW LEVEL
3”-24” BETWEENP IPES
Combustion Air Intake may also be snorkeled to obtain 12” min groun d
clearance.
AlternateVentTerminationAboveAnticipatedSnowLevel
(DualPipe)
If more than one direct vent furnace is to be installed
vertically through a common roof top, maintain the same
minimum clearances between the exhaust vent and air intake
terminations of adjacent units as with the exhaust vent and
air intake terminations of a single unit.
If more than one direct vent furnace is to be installed
horizontally through a common side wall, maintain the
exhaust vent outlets at the same elevation and always
terminate all air intakes at the same elevation.
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