9
FLOOR PROTECTION
If this fireplace is installed on a combustible floor, the floor area 20 inches in front of, and 12 inches either side
of the fireplace opening must be protected by an insulating noncombustible hearth extension. This hearth
extension may be either minimum 6-inch thick stone or brick as shown by Figure 10, a H2074 hearth exten-
sion kit or a locally constructed hearth equivalent to the H2074.
The H2074 hearth extension kit consists of sufficient insulation board to cover the 20" x 74" floor area with ˚
inch layer of insulation. A 20" x 74" piece of galvanized steel is included in the kit to cover the insulation before
a finishing layer of noncombustible material of stone, brick, tile, etc., is applied to finish the hearth extension.
The insulation used in the H2074 hearth extension has a thermal conductivity (K factor) of 0.43. If you do
construct a hearth extension equivalent to the H2074, be sure the insulation you use has enough compressive
strength to support the weight of the covering materials and persons standing on it, and insulating qualities
equal to or better than the 1/2" covering provided by the H2074.
FIGURE 10
FIGURE 11
SCREENED
OPENING
FIREPLACE AND HEARTH EXTENSION AND TOP VIEW
SB6000 MINIMUM HEARTH EXTENSION DIMENSIONS
NOTE: A hearth extension placed on a combustible
NOTE: A hearth extension placed on a combustible
floor must be constructed with rigid insulation which
floor must be constructed with rigid insulation which
has a minimum "R" value of 1.16 or a "K" value of
0.43. The insulation must be covered with a
non-combustible covering such as a tile stone,
marble, or a piece of 0.018 minimum sheet metal
which is needed to protect the insulation. Follow
instructions provided with the fireplace for all other
specifications and directions for proper installation
of the fireplace and hearth extension.
20"
12"
12"
74"
12"
(MIN.)
20"
(MIN.)
6"
(MIN.)
ALTERNATE BRICK OR STONE
HEARTH EXTENSIONS FOR USE
WITH THE SB6000 FIREPLACE
WHEN PLACED OVER A COM-
BUSTIBLE FLOOR WITHOUT
INSULATION BOARD PROTECTION
SB6000
FIREPLACE
HEARTH
BRICK OR STONE HEARTH
EXTENSION - 74" LONG MIN.
SAFETY STRIP IS REQUIRED WHEN
UNIT IS PLACED ON A COMBUSTIBLE FLOOR
OR PLATFORM.
12"
(MIN.)
53D9027. Rev 1 03/03
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