Harman® • PF-120 Installation Manual_R1 • 2014 -___ • 03/14
16
3-90-08121i
Direct Vent Wall Pass-through Kit
(Part #1-00-677177)
Figure 4.9
Inlet Cover part#
1-10-09542
Figure 4.8
H. Outside Air Installation
Per national building codes, consideration must be given to
combustion air supply to all combustion appliances. Failure
to supply adequate combustion air for all appliance demands,
may lead to back-drafting of those and other appliances.
When the appliance is side-wall vented: The air intake is best
located on the same exterior wall as the exhaust vent outlet
and located lower on the wall than the exhaust vent outlet.
When the appliance is roof vented: The air intake is best
located on the exterior wall oriented towards the prevailing
wind direction during the heating season.
The outside air connection will supply the demands of the
pellet appliance, but consideration must be given to the
total house demand. House demand may consume some
air needed for the stove, especially during a power failure. It
may be necessary to add additional ventilation to the space in
which the pellet appliance is located. Consult with your local
HVAC professional to determine the ventilation demands for
your house.
To install outside air use 3" non-combustible flex pipe Figure
4.8. There is a break-away hole on the rear panel of the PF-
120 stove which must be removed before connecting the flex
pipe. The pipe should be run outside and terminate to the
side or below the vent pipe outlet so the flue outlet is more
than 12" from the inlet cover. The maximum length run of this
pipe is 15 feet. The Inlet cover should be used to keep birds,
rodents, etc. out of the pipe Figure 4.8.
You may choose to use the optional Direct Vent Wall Pass-
through Kit which incorporates the venting pass-through and
outside air inlet into one component. Figure 4.9.
