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FRAMING AND INSTALLING THE FIREPLACE
STEP 1: Frame the opening for the fireplace using the
dimensions shown in figures 1 & 2.
STEP 2: If the fireplace is to be installed directly on carpeting,
tile (other than ceramic), or any combustible material other
than wood flooring, the fireplace must be installed upon a
metal or wood panel extending the full width and depth of the
fireplace.
STEP 3: Set the fireplace directly in front of this opening and
slide the unit back until the nailing flanges touch the side
framing.
STEP 4: Check the level of the fireplace and shim with sheet
metal if necessary.
STEP 5: Before securing fireplace to prepared framing, the
ember protector (provided), must be placed between the hearth
extension (not supplied), and under the bottom front edge of
the fireplace to protect against glowing embers falling
through. If the fireplace is to be installed on a raised platform,
a Z-type ember protector (not supplied) must be fabricated to
fit your required platform height. The ember protector should
extend under the fireplace a minimum of 1 - 1/2”. The ember
protector should be made of galvanized sheet metal (28-gage
minimum) to prevent corrosion.
STEP 6: Using screws or nails, secure the fireplace to the
framing through flanges located on the sides of the fireplace.
HEARTH EXTENSION
A hearth extension projecting a minimum of 16” in front of
and a minimum of 8” beyond each side of the fireplace
opening is required to protect combustible floor construction
in front of the fireplace. Fabricate a hearth extension using a
material which meets the following specifications: a layer of
non-combustible, inorganic material having a thermal
conductivity of K = 0.84 BTU IN/FT. HR. F (or less) at 1”
thick. For example, if the material selected has a K factor of
0.25, such as glass fiber, the following formula would apply:
Thermal conductivity “K” of materials can be obtained from
the manufacturer or supplier of the non-combustible material.
If the hearth extension is to be covered, use non-combustible
material such as tile, slate, brick, concrete, metal, glass,
marble, stone etc. Provide a means to prevent the hearth
extension from shifting and seal gap between the fireplace
frame and hearth extension with a non-combustible material
(see figure 3).
OPTIONAL OUTSIDE AIR KIT (MODEL AK4 / AK4F)
The installation of an outside air kit should be performed
during the rough framing of the fireplace due to the nature of
its location. Outside combustion air is accessed through a
vented crawl space (AK4F) or through a sidewall (AK4). See
page 10, figure 23 for instructions on how to operate the air
kit.
WARNING
Hearth extension is to be installed only
as illustrated.
Figure 4 OUTSIDE AIR KIT
0.25 x 1.0” = 0.30 thickness required
0.84
Figure 2 CORNER INSTALLATION
Figure 1 FRAMING DIMENSION
Figure 3 HEARTH EXTENSION
