Hearth and Home Technologies AK-225 Installation Instructions

Leave this manual with party responsible for use
and operation.
The Hearth Technologies AK-225 Air Kit is used to bring in
outside make-up and combustion air to Heat & Glo solid
wood fuel fi replaces and some gas fi replaces. Check the
fi replace instructions.
The air that is drawn into the fi re chamber from outside
the home or unheated area helps relieve the demand for
combustion air being drawn into the fi replace from inside
the home.
CAUTION! Risk of Cuts or Abrasions. Wear protective
gloves and safety glasses during installation. Sheet metal
edges are sharp.
CAUTION! Do not install damaged components. If you
received components that are damaged, contact your
dealer for assistance.
Kit Contents:
(1) Duct Termination
(2) Side Collars
(1) Flex Duct
(4) 1-1/2 Inch Truss Head Screws
(3) 1/2 Inch Bit Tip Screws
(2) Plastic Tie Straps
For reference, see Figure 1.
NOTE: 4-inch Class 1 ducting material or metal duct may
be used with AK-225.
INSTALLATION PRECAUTIONS
The duct termination should be located so it is exposed to
an outdoor opening at least 100 square inches. If the duct
termination must be located in a crawl space or basement,
be sure the termination area has 100 square inches of
ventilation opening to outside air.
Hearth & Home Technologies • AK-225 Outside Air Kit Instructions • 200-900L Rev. B • 11/13
AK-225
Installation Instructions
DUCT TERMINATION
SCREWS
(QTY 4)
Figure 1. Kit Contents
The duct termination must be located so it does not com-
pete for air fl ow with exhaust fans, gas vent hoods or
other air consuming devices or appliances. It must not
be obstructed by rafters, insulating materials, or other
obstructions. The less restrictive the air supply, the better
the AK-225 will perform.
WARNING! Risk of Explostion! DO NOT install duct ter-
mination into area that cold contain fl ammable liquids or
fumes, such as an attic space or garage.
INSTALLATION INSTRUCTIONS
Determine the location of the fi replace as described in the
fi replace installation manual. Then plan the location of the
duct termination and the route of the duct run between the
fi replace and the duct termination.
The duct run must be limited to a maximum distance of 40
feet from the fi replace pipe collar to duct termination. This
will provide the least restriction to air fl ow. No more than
four 90 degree elbows can be used. The duct run may be
horizontal, vertical inclined or any combination of these for
all models. Vertical duct runs must be at least three (3)
feet below the fi replace chimney fl ue exit. See Figure 2.
SCREWS
(QTY 3)
PLASTIC TIE STRAPS (2)
SIDE COLLAR (2)
FLEX DUCT
1