HearthStone 8012, Owner'S Manual

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the stove is located. With outside air supplied
directly to the stove, drafts within the room and air
infiltration within the building are reduced. Use of
the outside air kit may also improve stove
performance in a particularly air-tight house.
The outside air kit for this stove allows for the direct
connection of the stove's air intake to a minimum 3"
(76 mm) diameter duct (supplied by others) which
leads to the outside of the house. When considering
placement of the duct from the outside of the house
to the hearth, keep in mind the need to avoid wiring
and structural members in the wall.
See the following illustrations for all connection
options. Choose the one most convenient. Locate
the termination of the duct on the outside wall of the
structure in such a manner so as to preclude the
possibility of obstruction by snow, leaves or other
material. Screen the opening against animals and
insects (any screen, duct, clamps, and hood
supplied by others).
Figure 4