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© 2021 United States Stove Company
7
shutdown and keep exhaust from causing a nuisance or
hazard by exposing people or shrubs to high temperatures.
The maximum recommend vertical venting height is 12-
feet for 3-inch type “PL” vent. Total length of horizontal
vent must not exceed 4-feet. This could cause back
pressure. Use no more than 180 degrees of elbows (two
90-degree elbows, or two 45-degree and one 90-degree
elbow, etc.) to maintain adequate draft.
IMPORTANCE OF PROPER DRAFT
Draft is the force which moves air from the appliance
up through the chimney. The amount of draft in your
chimney depends on the length of the chimney, local
geography, nearby obstructions and other factors. Too
much draft may cause excessive temperatures in the
appliance. Inadequate draft may cause backpung into
the room and ‘plugging’ of the chimney. Inadequate draft
will cause the appliance to leak smoke into the room
through appliance and chimney connector joints. An
uncontrollable burn or excessive temperature indicates
excessive draft. Take into account the chimney’s location
to ensure it is not too close to neighbours or in a valley
which may cause unhealthy or nuisance conditions.
PELLET VENT TYPE
A certified 3-inch or 4-inch 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-inch to 4-inch adapter for 4-inch pipe). The connection
at the back of the stove must be sealed using Hi-Temp
RTV. Use a 4-inch vent if the vent height is over 12-
feet or if the installation is over 2,500 feet above sea
level. We recommend the use of Simpson Dura-Vent®
or Metal-Fab® pipe (if you use other pipes, consult your
local building codes and/or building inspectors). Do not
use Type-B Gas Vent pipe or galvanized pipe with this
unit. The pellet vent pipe is designed to disassemble for
cleaning and should be checked several times during the
burning season. The pellet vent pipe is not furnished with
the unit and must be purchased separately.
PELLET VENT INSTALLATION
The installation must include a clean-out tee to enable
collection of fly ash and to permit periodic cleaning of the
exhaust system. 90-degree 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%. All joints in the vent system must be
fastened by at least 3 screws, and all joints must be
sealed with Hi-Temp RTV silicone sealant to be airtight.
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. Vent surfaces can get hot enough
to cause burns if touched by children. Noncombustible
shielding or guards may be required.
PELLET VENT TERMINATION
Do not terminate the vent in an enclosed or semi-enclosed
area, such as; carport, garage, attic, crawl space, under a
sun deck or porch, narrow walkway, or any other location
that can build up a concentration of fumes. Termination
in one of these areas can also lead to unpredictable
pressure situations with the appliance, and could result
in improper performance and/or malfunction. The
termination must exhaust above the outside air inlet
elevation. The termination must not be located where it
will become plugged by snow or other materials. Do not
terminate the venting into an existing steel or masonry
chimney.
VENT TERMINATION CLEARANCES
A. Minimum 4-foot (1.22m) clearance below or beside
any door or window that opens.
B. Minimum 1-foot (0.3m) clearance above any door or
window that opens.
C. Minimum 3-foot (0.91m) clearance from any
adjacent building.
INSTALLATION
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