NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
11
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 32°F (0°C).
Figure 10B
Framing, Facing and Mantel
The construction of the framing, facing, and
mantel must be in accordance with the standards
and the following illustrations:
(
see
Figures 10B. 11, 13, 14 and 15
)
:
1.
Frame the fi replace using 2 x 3 or heavier
lumber.
2. WARNING:
Combustible materials cannot
be used in the space directly above the
fi replace (except for framing on the front
facing). This area must remain empty for
a height of 6’8" (2032 mm) measured
from the base of the appliance.
3.
Frame the fi replace with vertical studs at
the sides of the fi replace running from fl oor
to ceiling (see
Figure 10
)
.
If combustible facing is to be used, posi-
tion the studs back, from the front edge
of the fi replace, a space the thickness of
the facing material so that the facing can
be installed fl ush with the fi replace facing.
Frame headers between the vertical studs
only as follows:
• Place 2 x 3 or 2 x 4 headers, only
along the upper part of the front, side
and back faces. Do not put wood or
any combustible material within the
area above the fi replace except on
the front facing.
• Place headers only as required to
support the facing and mantel.
The fi replace cannot be in contact with the
house insulation material. Cover the insula-
tion with drywall panels or any rigid material
around the fi replace.
Hearth Extension Requirements
The WRT4826WH fi replace may be installed
directly on a combustible fl oor. The supplied
safety metal strip must be positioned as follows:
One half under the front of the fi replace and the
other half must extend on the fl oor over which the
hearth extension will be built (see
Figure 10A
).
* The safety metal strip must cover the entire
width of the fi replace
The combustible fl oor in front of the fi replace
must be covered with a non-combustible mate-
rial (tile, marble, stone, etc). See
Figure 10B
.
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 fi replace is being installed in a cold
climate, it is especially important to seal all
cracks around the fi replace and wherever cold
air could enter the room with noncombustible
material.
Hearth
Extension
Mantel
WARNING: THE HEARTH EXTEN-
SION IS TO BE INSTALLED ONLY
AS ILLUSTRATED.
The crack between the fi replace
and the hearth extension must be
sealed with a non-combustible
material such as sand-cement
grout.
Hearth extension of an elevated fi replace
must respect the same minimal dimen-
sions as a fi replace installed directly on
the fl oor.
Safety Metal Strip
Hearth Extension
Non-Combustible
Finish Material
Floor
Figure 10A - Hearth Extension Requirements
Fireplace
1/2”
13mm
Elevated fi replace installations
require a special “Z” Metal
Safety Strips (fi eld provided),
in place of the safety metal strip
shown above. The safety strip
should extend the full width of
the fi replace. When more than
one safety strip is used they must
overlap by a minimum of 1”.
Platform
2”
Fireplace
Elevated Fireplaces
12" Max.
Area where
wood mantel
can be
installed
24"
45°
17"
18"
38"
*54"
Non-combustible Material
* The shelf may be lowered to 48 inches if
the upper panel is blocked by the panel for
clean face option (BPCF) and that hot air
gravity ducts are used (7B30ZK-1).
