Avoiding Smoke And Odors - Harman Stove Company P35i Owner's Manual

P35i Fireplace Insert
B. Avoiding Smoke and Odors
Negative Pressure, Shut-down, and Power
Failure:
To reduce the probability of back-drafting or burn-
back in the pellet burning appliance during power
failure or shut-down conditions, the stove must
be able to draft naturally without exhaust blower op-
eration. Negative pressure in the house will resist this
natural draft if not accounted for in the pellet appliance
installation.
Heat rises in the house and leaks out at upper levels.
This air must be replaced with cold air from outdoors,
which flows into lower levels of the house. Vents and
chimneys into basements and lower levels of the house
can become the conduit for air supply, and reverse under
these conditions.
Outside Air:
Harman Home Heating and Hearth & Home Tech-
nologies recommend attaching outside air in all
installations, especially lower level and main floor
locations.
Per national building codes, consideration must be
given to combustion air supply to all combustion appli-
ances. 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.
The outside air kit consists of a flue stub pipe,
fiberglass gasket, silicone gasket, intake box and a
section of flex pipe.
An adjustable chimney intake extension, part # 1-00-
674104 is available to be used on masonry chimneys
only.
To install outside air, use kit part number 1-00-774280.
Follow the installation instructions provided with the
kit.
Save These Instructions
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.
Do not connect this unit to a chimney
flue servicing another appliance.
NOTE: The restriction of not venting more than one appliance
to the same flue applies to the U.S. specifically. While it is not
recommended that you use the same chimney for more than
one appliance, in Canada certain exceptions may be made.
Be sure to contact your building code inspection official to
see if this option is allowed in your area, and to find out the
specific requirements for such an installation.
Do not connect this unit to any air
distribution duct or system.
3-90-775 Pellets or Corn/Pellet Mixture Only
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