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16
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 operation. 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
Technologies 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 ap-
pliances. 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, es-
pecially 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 lo-
cal HVAC professional to determine the ventilation
demands for your house.
dO NOT CONNECT ThIS APPlIANCE TO
ANY AIr dISTrIbuTION duCT Or SYSTEm.
venting
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 INSTAll A FluE dAmPEr IN ThE
EXhAuST vENTINg SYSTEm OF ThIS
APPlIANCE.
dO NOT CONNECT ThIS uNIT TO A
ChImNEY FluE SErvINg ANOThEr
APPlIANCE.
ChImNEY CONNECTOr mAY NOT PASS
ThrOugh AN ATTIC Or rOOF SPACE,
ClOSET Or SImIlAr CONCEAlEd
SPACE, Or A FlOOr Or CEIlINg.
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