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Mantel
A wood mantel, if installed, must be at least
48" (1.2 m) above the base of the fireplace (see
Figure 7A). There is no restriction regarding
the length or the width of the mantel.
Hearth Extension Requirements
(refer to Figures 7A and 7B)
A non-combustible hearth extension must
be built in front of the fireplace and extend
out on both sides. Hearth extensions must
be constructed according to the following
guidelines:
1. A layer of sheet metal 0.018" (0.45mm) thick
or 3/8" (9mm) thick insulating board or any
other material (tiles, marble, granite) with
equivalent heat resistance may be used.
Check with the local building authorities
before installing to determine what other
materials are acceptable in your area.
2. The hearth extension should be secured to
the floor. The gap between the fireplace and
the hearth extension must be sealed. The sup-
plied safety metal strip must be positioned
as follows: One half under the front of the
fireplace and the other half must extend on
the floor over which the hearth extension will
be built (see Figure 7A).
* The safety metal strip must cover the entire
width of the fireplace.
3. On a raised base or raised hearth, a "Z" shape
piece of metal must be fabricated to join the
bottom of the fireplace to the floor.
Cold Climate Installations
Climates where temperatures will fall below
32° F (0° C).
The heating performance of the appliance will
vary depending upon the level of insulation,
house design, how the appliance is operated,
etc.
If this fireplace is being installed in a cold
climate, it is especially important to seal all
cracks around the fireplace and wherever cold
air could enter the room with noncombustible
material. Also, the outside air inlet duct should
be wrapped with noncombustible insulation to
minimize the formation of condensation. Do
not place insulation materials directly against
the chimney sections. We recommend that you
use the insulated wall radiation shield since it
will maintain the home's thermal barrier. AC
chimney is NOT recommended in very cold
climates (in areas with temperatures below
0° F (-18° C).
8
Fireplace
The crack between the fireplace
and the hearth extension must be
sealed with a non-combustible
material such as sand-cement
grout.
Elevated Fireplaces
u
Elevated fireplace installations
require a special "Z" Metal
Safety Strips (field provided),
in place of the safety metal strip
shown above. The safety strip
should extend the full width of
the fireplace. When more than
one safety strip is used they must
overlap by a minimum of 1".
Figure 7A - Hearth Extension Requirements
Mantel
48"
Min.
18"
Figure 7B
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
WARNING: THE HEARTH EXTEN-
SION IS TO BE INSTALLED ONLY
AS ILLUSTRATED.
Safety Metal Strip
Hearth Extension
Non-Combustible
Finish Material
Floor
Fireplace
Platform
2"
u
8"
Non-Combustible Material
Hearth
Extension
1"
52"
1/2"
13mm
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