Hearthstone Quality Home Heating Products, Inc
® Green Mountain 40 (Model 8640)
12
Figure 6 Trim and Mantle Clearances
O
UTSIDE
A
IR
S
UPPLY
(Optional Kit #96-53400)
You can connect an outside air source directly to
this stove using an optional outside air kit. The
advantage of providing outside air directly to the
stove is that the air used by the stove for combustion
is taken from outside the residence rather than from
within the room where the stove is located.
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
structural members of the house. The outside air kit
attaches to the underside of the stove. Refer to the
instructions provided with the kit for installation.
*An adaptor for 4” duct is available if needed. KIT
#90-53308
Figure 7 – Outside Air Kit Detail
The International Residential Code (IRC) does not
allow the outside air duct to terminate higher than
the appliance. Some building officials restrict vertical
rise in the duct’s termination. Hearthstone
recommends the termination be at the same level, or
lower than the air intake on the stove.
Locate the termination of the duct on the outside
wall of the home in such a manner to avoid the
possibility of obstruction by snow, leaves or other
material. Screen the termination using ¼” x ¼” mesh
rodent screen and cover it with a rain/wind proof
hood (flex pipe, outside termination, mesh, and hood
supplied by others) Contact your dealer for
availability.
