Heatilator • LM42 • Installers Manual • 4087-901 • Rev A • 04/14/16
16
D. Frame the Fireplace
WARNING! Risk of Fire!
Hearth extension design must be
determined before framing and installation of fireplace. Any
installation outside the scope as stated in this manual please
contact your authorized HHT dealer prior to installation.
The fireplace will fit a framed opening of:
LM42/LM42-SS: 60-1/4 in. (1530 mm) tall and 65-1/2 in.
(1664 mm) wide.
Figure 3.6 shows a typical framing (using 2 x 4 lumber) of
the fireplace, assuming combustible materials are used.
WARNING! Risk of Fire!
Comply with all minimum clear-
ances specified.
• Standoffs can be 0 in. to combustibles.
• Chimney sections at any level require a 2 in. (51 mm)
minimum air space clearance between the framing and
chimney section.
•
DO NOT
pack required air space with insulation or other
materials.
All required clearances to combustibles around the fire
-
place must be adhered to. See Figure 3.3. 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 24 in.
(610 mm) from the finished backwall to the outside of front
wall framing.
CAUTION!
Risk of Cuts/Abrasions. Wear protective gloves
and safety glasses during installation. Sheet metal edges
are sharp.
•
DO NOT
install against vapor barriers or exposed
insulation.
• Ensure insulation and vapor barriers are secured in
place with respect to the fireplace and chimney system.
E. Secure and Level the Fireplace
This fireplace may be placed on either a combustible or
noncombustible continuous flat surface.
DO NOT
install
directly on carpeting, vinyl, tile or any combustible mate
-
rial other than wood.
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. Square the
unit and fasten unit nailing flanges to framing using nails
or screws through the nailing tabs.
Some figures in manual show the fireplace installed on the
floor. However, this fireplace can be elevated off the floor
provided that the fireplace is properly supported by framing
materials and the ceiling clearances are maintained.
Figure 3.6 Nailing Tab Locations
NAILING TABS
BOTH SIDES
