Floor Protection - MHSC SB44SS Installation, Operation And Maintenance Manual

SB44SS Outdoor 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 exten-
sion. This hearth extension may be either minimum 6-inch thick stone or brick as shown by Figure
10, an H068 hearth extension kit or a locally constructed equivalent to the H068.
The H068 hearth extension kit consists of sufficient insulation board to cover the floor area with
1/" inch layer of insulation. A 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 H068 hearth extension has a thermal conductivity (K factor) of 0.43. If
you do construct a hearth extension equivalent to the H068, 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/" covering provided by the H068.
Figure 12
Hearth
12"
Min.
Safety Strip is
Required When
Unit is Placed on a
FP38
Combustible Floor
or Platform
Figure 13
Top view
Fireplace and hearth
extension
1
Alternate brick or stone hearth ex-
tensions for use with the SB44SS
Series fireplace when placed
over a combustible floor without
insulation board protection.
12"
Min.
Brick or Stone Hearth Extension
- 68" Long Min.
FP2238
SB5400 dec hearth
12"
Screened Opening
68" Min.
Minimum Hearth Extension Dimensions
FP2239
SB5400
hearth protection
Figure 14
20" Min.
6" Min.
CauTION:
place finishing materi-
als beyond these edges
or cover air inlets.
FP39
12"
20"

FLOOr prOTeCTION

Do not
CauTION:
Only brick or other noncombustible materials
may be placed in front of, or in contact with
FP1168
the black face of the fireplace.
finishing front
12/20/01 djt
NOTe: A hearth extension placed on a com-
bustible 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 noncombustible cover-
ing such as a tile, stone, marble, or a piece of
0.018 minimum sheet metal which is needed to
protect the insulation. Follow instructions pro-
vided with the for all other specifications and
directions for proper installation of the fireplace
and hearth extension.
Screen Rail
Hearth
FP1168
87D0059