Sure Heat VFBC Firebox - Manual (Page 11)

Installation and Instructions
11
Finishing the Fireplace
There are a wide variety of finishing materials
available for your fireplace from formal wall treatments
with marble and mantles to rustic wood paneling, stone
or brick.
IT IS IMPORTANT THAT THE BLACK FACE OF
THE FIREPLACE NOT BE COVERED WITH ANY
TYPE OF COMBUSTIBLE MATERIAL.
Noncombustible facing materials such as marble,
brick or ceramic tile may overlap the black face of the
fireplace up to the opening on either side of the
fireplace. Seal all joints between the black fireplace
face and the wall covering with a heat-resistant
material such as rock wool insulation or mortar. Be
sure to use high temperature adhesive or mortar when
anchoring brick, stone or tile to the face of the
fireplace. Check to see whether man-made brick and
stone are made of noncombustible materials before
using them on the face of the fireplace. Some of these
products contain combustible materials. Combustible
wall coverings such as paneling or wallboard may not
overlap the black face of the fireplace. The space
between the wall covering and the fireplace should be
sealed with a heat-resistant material such as rock wool
insulation or mortar.
NOTE: An “L” shaped steel lintel must be installed
across the top of the firebox opening where facing
materials such as brick or stone are used on the face
of the firebox. It acts as a support/firestop. It should be
attached to the face of the fireplace with screws and
sealed to the fireplace with a heat-resistant sealer.
These vent free fireplaces are not to be
used with any TYPE or MODEL of glass doors.
Fireplace screens must be in
the closed position across the entire hearth
opening prior to the operation of the decorative
room heater.
NOTE: Information on provisions for adequate
combustion and ventilation air are located in the
unvented room heaters installation instructions.
Hearth Extension
An optional hearth extension may be used, but is
not required for these fireboxes.
A raised hearth extension may be used as shown
in Figure 9.
Install Optional Outside Air Kit
The VAK1 Outside Air Kit can be installed to bring
combustion air to the heated room air. The air drawn
into the heated room air from outside the home or
unheated area helps relieve the pressure in the home.
The duct termination should be located so it is
exposed to an out-of-doors opening of at least 100
square inches. If the duct termination must be located
in a crawl space or basement, be sure the termination
area has 100 square inches of ventilation opening to
outside air.
The duct termination must be located so it does
not compete for air flow with exhaust fans, gas vent
hoods or other air consuming devices or appliances. It
must not be obstructed by rafters, insulation materials
or other obstructions. The less restrictive the air
supply, the better the outside air kits will perform.
It is good practice to protect your hands and
eyes during installation by wearing work gloves and
safety glasses.
Do not install termination into a garage
or other area that could contain flammable liquids
or fumes, into a confined attic space or non
ventilated soffit .
Combustible Platform
Combustibles Allowed
(no carpet or vinyl)
Surround
1/2”
Seal with Non-Combustible Material
Hearth Brick
Hearth
Extension
Fig. 9