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D. Outside Air
Figure 4.12
Inlet Cover part#
1-10-08542
Figure 4.13
Direct Vent Wall Pass-through Kit
(part #1-00-677077)
Figure 4.14
1 6
Outside air flex
pipe goes here.
Harman® • XXV Installation Manual_R23 • 2004 -___ • 08/13
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.
There is a break-away hole on the rear panel of the XXV
stove which must be removed before connecting the flex pipe.
Figure 4.12. 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. If a longer run is needed the size must
be increased to 3". The Inlet cover should be used to keep
birds, rodents, etc. out of the pipe Figure 4.13.
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 4.14.
3-90-00684i
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