14
Majestic Biltmore Series • SB100 • 4013-303 Installers Manual • Rev H • 08/20
Use only non-combustible
material below the top of
the front standoffs.
30 1/2 in.*
(772 mm)
61 5/8 in.
(1565 mm)
8 in. (203 mm) extra space
needed (both sides) for outside air
connection. If outside air duct has
no bend, this dimension may be
reduced as long as minimum
clearances are met.
* If interior of chase will be
drywalled, add the thick-
ness to this measurement.
Header will sit
on top of front
stand offs after
fireplace is
installed.
17 in. (368 mm)
framing.
E. Frame the Fireplace
NOTICE:
Hearth extension design must be determined
before installation of fireplace.
If the fireplace is placed on the floor the maximum height
of a finished raised hearth is 8-3/4”, if you want a higher
raised hearth the fireplace must be placed on a platform.
WARNING! Risk of Fire!
You must comply with all
minimum air space clearances to combustibles.
DO NOT
pack required air spaces with insulation or other materi-
als.
WARNING! Risk of Fire!
Comply with all minimum clear-
ances specified.
•
A minimum 1-1/2 in. (38 mm) air clearance must
be maintained at the back and 1-1/2 in. (38 mm)
to the sides of the fireplace assembly.
• Chimney sections at any level require a 2 in. (51 mm)
minimum air space clearance between the framing and
chimney section.
Figure 3.12 shows a typical framing (using 2 x 4 lumber)
of the fireplace, assuming combustible materials are
used. All required clearances to combustibles around the
fireplace must be adhered to. See Figure 3.2. Any framing
across the top of the fireplace must be above the level of
the top standoffs.
The finished cavity depth must be no less than 30-1/2 in.
(772 mm) from the finished backwall to the outside of front
wall framing.
DO NOT
install header until the fireplace is in position.
CAUTION!
Risk of Cuts/Abrasions. Wear protective gloves
and safety glasses during installation. Sheet metal edges
are sharp.
WARNING! Risk of Fire!
Prevent contact with sagging,
loose insulation.
•
DO NOT
install against vapor barriers or exposed
insulation.
• Secure insulation and vapor barriers.
• Provide minimum air space clearances at the sides and
back of the fireplace assembly.
F. Secure and Level the Fireplace
This fireplace may be placed on either a combustible
or noncombustible continuous flat surface. Follow the
instructions for framing in Section 3. Slide the fireplace
into position. Be sure to provide the minimum 1-1/2 in.
air clearance at the sides and 1-1/2 in. at the back of the
fireplace.
The fireplace should be positioned so the face of the non-
combustible material on the fireplace will be flush with the
face of the drywall on the walls.
Level the fireplace and shim as necessary.
Figure 3.12 Framing the Fireplace
1/2 in.
(13 mm)
Fireplace must be set out
1/2 in. (13 mm) in front of
the face of the framing
material.
NOTE: Before framing up the chase, consider where
and how the chimney will run. If there are obstacles
that might be in the way, it may be necessary to make
the chase larger than shown to allow for offsets to be
used. Refer to offset chart on page 17 if needed.
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