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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 non-
combustible 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 20" x 74" piece of galvanized steel should be installed
to cover the insulation before a finishing layer of noncom-
bustible material of stone, brick, tile, etc., is applied to finish
the hearth extension.
Figure 10
Hearth
12"
Min.
Safety Strip is Re-
quired When Unit is
Placed on a Combus-
tible Floor or Platform
Figure 12
Top view
Fireplace and Hearth
extension
87D0058
12"
Min.
FP2221
FP2221
decorative hearth
12"
Screened Opening
74"
Minimum Hearth Extension Dimensions
FP2222
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 insulat-
ing qualities equal to or better than that described above.
Figure 11
20"
Min.
CauTION: Do not
place finishing materials
beyond these edges or
8"
cover air inlets
Min.
Brick or Stone Hearth
Extension - 74" Long
Min.
FP2222
12"
20"
SB50HB Series Woodburning Fireplace
CauTION:
Only brick or other noncombustible mate-
rial may be placed in front of, or in contact
with the black face of the fireplace.
FP2247
NOTe: A hearth extension placed on a
finishing front
combustible floor must be constructed
12/20/01 djt
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.
Screen
Rail
Hearth
FP1168
11
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