Frame The Fireplace; Secure And Level The Fireplace - Heatilator A36C Installation Manual

D. 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 2 in. (51 mm), if you want
a higher raised hearth the fireplace must be placed on a
platform.
The fireplace will fit a framed opening of:
A36: 41-1/2 in. (1054 mm) tall and 43 in. (1092 mm) wide,
A42: 41-1/2 in. (1054 mm) tall and 49 in. (1245 mm) wide.
WARNING! Risk of Fire!
ances specified.
• A minimum 3/4 in. (19 mm) air clearance must be
maintained at the back and 3/4 in. (19 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.
WARNING! Risk of Fire!
minimum air space clearances to combustibles. DO NOT
pack required air spaces with insulation or other materi-
als.
Figure 3.5 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. (No recess above standoffs.)
2 in. (51 mm)
min. air space
clearance
from chimney.
C
Figure 3.5
Heatilator • A36/42C, A36/42CH • Installers Manual • 4017-262 • Rev D • 10/07/13
12
Comply with all minimum clear-
You must comply with all
A
B
Framing the Fireplace
The finished cavity depth must be no less than 23 in.
(584 mm) from the finished backwall to the outside of front
wall framing. Framing must extend straight up all the way
to the ceiling.
CAUTION! Risk of Cuts/Abrasions. Wear protective gloves
and safety glasses during installation. Sheet metal edges
are sharp.
E. Secure and Level the Fireplace
This fireplace may be placed on either a combustible or
noncombustible continuous flat surface. Follow the in-
structions for framing in Section 3. Slide the fireplace into
position. Be sure to provide the minimum 3/4 in. air clear-
ance at the sides and 3/4 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.
WARNING! Risk of Fire!
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.
Fireplace must be set out
1/2 in. (13 mm) in front of
1/2 in.
the face of the framing
(13 mm)
material.
Header MUST NOT be notched!
D = extra space needed for outside air connection.
If outside air duct has no bend, this dimension may be
reduced as long as minimum clearances are met.
D
Model # A
in. 43
A36
mm 1092
in. 49
A42
mm
1245
* If interior of chase will be drywalled, add the thickness to
this measurement.
** Adjust header height for a raised floor under fireplace.
Prevent contact with sagging,
B* C** D
23 41 1/2 8
584 1054 203
23 41 1/2 8
584 1054 203