Specifications
87D0058
11
SB50HB Series Woodburning Fireplace
If this fireplace is installed on a combustible floor, the floor area 0 inches in front of, and 1 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, or a locally constructed hearth equivalent.
A 0” x 74” piece of galvanized steel should be installed 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 hearth extension should have a thermal conductivity (K factor) of 0.43.
If you do construct a hearth extension, 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 that described above.
12”
Min.
12”
Min.
FP2221
decorative hearth
20”
Min.
8”
Min.
Figure 10
Hearth
Safety Strip is Re-
quired When Unit is
Placed on a Combus-
tible Floor or Platform
Brick or Stone Hearth
Extension - 74” Long
Min.
FP1
12”
74”
12”
20”
FP2222
hearth extension
Figure 12
Minimum Hearth Extension Dimensions
Screened Opening
FP
A hearth extension placed on a
combustible floor must be constructed
with rigid insulation which has a mini-
mum “R” value of 1.16 or a “K” value of
0.43. The insulation must be covered
with a noncombustible covering such as
a tile, stone, marble, or a piece of 0.018
minimum sheet metal which is needed
to protect the insulation. Follow instruc-
tions provided with the for all other
specifications and directions for proper
installation of the fireplace and hearth
extension.
FP2247
finishing front
12/20/01 djt
Do not
place finishing materials
beyond these edges or
cover air inlets
Screen
Rail
Hearth
FP1168
Figure 11