Harman Stove Company P38+ Installation & Operating Manual page 9

Direct Vent Wall Passthrough Kit
(part #1-00-677177)
Vent Configurations:
To reduce probability of reverse drafting during shut-down conditions, Hearth & Home Technologies strongly recommends:
• Installing the pellet vent with a minimum vertical run of five feet, preferably terminating above the roof line.
• Installing the outside air intake at least four feet below the vent termination.
To prevent soot damage to exterior walls of the house and to prevent re-entry of soot or ash into the house:
• Maintain specified clearances to windows, doors, and air inlets, including air conditioners.
• Vents should not be placed below ventilated soffits. Run the vent above the roof.
• Avoid venting into alcove locations.
• Vents should not terminate under overhangs, decks or onto covered porches.
• Maintain minimum clearance of 12 inches from the vent termination to the exterior wall. If you see deposits developing
on the wall, you may need to extend this distance to accommodate your installation conditions.
hearth & home technologies assumes no responsibility for, nor does the warranty extend to, smoke damage caused
by reverse drafting of pellet appliances under shut-down or power failure conditions.
9 PP38+ Pellet Stove
Outside air flex pipe
goes here.
Inlet Cover part#
1-10-08542
venting
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. There
is a break-away hole on the rear panel of the 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.
Inlet cover, part number 1-10-08542 should be used to keep
birds, rodents, etc. out of the pipe.
You may choose to use the optional Direct Vent Wall
Passthrough Kit (part #1-00-677177) which incorporates the
venting passthrough and outside air inlet into one component.
3-90-08422R35_10/13