22
Outside Air
The outside air kit consists of a flue stub pipe,
fiberglass gasket, silicone gasket, intake box and a
section of flex pipe. See Fig. 47.
An adjustable chimney intake extension, part # 1-00-
674104 is available to be used on masonry chimneys
only. See Fig. 48.
Additional information and diagrams can be found
on pages 23 thru 27, under venting.
To install outside air, use kit part number 1-10-
674080. Follow the installation instructions provided
with the kit.
vent Pipe
Be sure to use approved pellet vent pipe wall and ceil-
ing pass- through fittings to go through combustible walls
and ceilings. Be sure to use a starting collar to attach
the venting system to the stove. The starting collar must
be secured to the flue stub with at least three screws,
and sealed with high temp silicone caulking.
4" stainless steel flex vent piping is only allowed for
use in masonry fireplaces and chimneys or factory built
woodburning fireplaces with class A metal chimneys.
Pellet venting pipe (also known as Type L or PL vent)
is constructed of two layers with air space between the
layers. This air space acts as an insulator and reduces
the outside surface temperature to allow a clearance to
combustibles of only 3 inches. The sections of pipe lock
together to form an air tight seal in most cases; however,
in some cases a perfect seal is not achieved. For this
reason and the fact that the Accentra Insert operates
with a positive vent pressure, we specify that the joints
also be sealed with silicone.
Where passing through an exterior wall or roof, be
sure to use the appropriate pass-through device provid-
ing an adequate vapor barrier. Venting manufacturers
generally provide these pas-through devices.
venting
Fig. 47
100% Outside Air Kit
100% Outside Air
Kit # 1-00-674080
Designed for 3" flex pipe
1/8" Fiberglass Gasket
2 3/8" ID Flex Pipe
1/2" Silicone Gasket
Intake Box
Fig. 48
Adjustable Chimney
Intake Extension
Part # 1-00-674104
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.
Summary of Contents for Harman Accentra Insert
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