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6 USSC
NOTE: These are guidelines only. Proper venting is accomplished by design and common sense. In most
installations 3” inch diameter venting is adequate. If it does not vent properly you will have to change it
to 4”.
DO NOT CONNECT TO ANY AIR DISTRIBUTION DUCT OR SYSTEM
GUIDELINES FOR EXHAUST VENTING SYSTEMS DESIGN
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A UL listed 3” or 4” type “PL” pellet vent exhaust system must be used for installation and attached to the pipe connector
provided on the back of the stove. Use a 3” to 4” adapter for 4” pipe. A cap must be used at the termination of type “L”
vent chimneys. 4” PL is required for elevations above 2,500 feet above sea level.
Do not terminate vent in any enclosed or semi-enclosed area, such as; carports, garage, attic, crawl space, under a
sundeck or porch, narrow walkway or close area, or any location that can build up a concentration of fumes such as a
stairwell, covered breezeway etc.
Vent surfaces can get hot enough to cause burns if touched by children. Noncombustible shielding or guards may be
required.
Do not install a flue damper in the exhaust vent of this unit.
Termination must exhaust above air inlet elevation. Installation MUST include three (3) vertical feet of pellet vent pipe.
This will create some natural draft to prevent the possibility of smoke or odor during appliance shutdown and to keep
exhaust from causing a nuisance or hazard from exposing people or shrubs to high temperatures. Do not connect
this unit to a chimney flue serving another appliance. Do not connect directly to a masonry chimney.
Distance from doors and windows, gravity or ventilation air inlet into building:
Not less than 4 ft./1.2m below, 4ft./1.2m horizontally from, 1ft./305mm above(This does not apply if the
windows are non-opening or have been fixed so they cannot open.)
Distance from bottom of termination and grade-1ft./305mm minimum. This is conditional upon the plants and nature of
grade surface. The exhaust gases are not hot enough to ignite grass, plants or shrubs located in the vicinity of the
termination. The grade surface must not be a lawn. Distance from bottom of termination and public walkway is 7ft./
2.1m minimum.
Distance to combustible materials-2ft./610mm. This includes adjacent building, fences, protruding parts of the struc-
ture, roof overhang, plants and shrubs, etc.
The installation must include a cleanout tee to enable collection of fly ash and to permit periodic cleaning of the exhaust
system. 90
°
elbows accumulate fly ash and soot thereby reducing exhaust flow and performance of the stove. Each
elbow or tee reduces draft potential by 30% to 50%.
Total length of horizontal vent must not exceed 48”(4ft.)/1,200mm. All joints in the vent system must be fastened by at
least 3 screws, and all joints must be sealed with RTV silicone sealer to be airtight.
The “PL” vent or single wall stainless exhaust system must be installed so as to be GAS TIGHT! The vent manufacturer’s
installation procedures must be followed. In addition, pipe connections, joints and all pipe seams within the home
should be sealed with high temperature RTV silicone sealer.
The area where the vent pipe penetrates to the exterior of the home must be sealed with silicone or other means to
maintain the vapor barrier between the exterior and the interior of the home.
It is recommended that only an authorized installer install your pellet/corn stove, preferably an NFI certified
specialist. The following installation guidelines must be followed to ensure conformity with both the safety listing of this
stove and to local building codes.
INSTALL VENT AT CLEARANCES SPECIFIED BY THE VENT MANUFACTURER.