Heat & Glo RH-36 Series Owner's Manual page 39

Model #
in.
RH-36
914
mm
in.
RH-42
1067
mm
4 in. (102 mm)
minimum between
bottom of fireplace opening
and finished surface of hearth extension
C
B
Figure 11.1 Hearth Extension Dimensions
Continuous, non-
combustible sealant
1/2 in. Micore Hearth
Tile, stone or other
Extension (or
non-combustible material
equivalent insulation)
See Table 11.2.
Floor constructed of wood or
other combustible material
Figure 11.2 Hearth Extension Construction
A B C D
36 52 8 16
1321 203 406
42 66 12 20
1676 305 508
A
C
D
Fireplace
Opening
(102 mm) min.
2 in. (51 mm) of the Protective
Metal Hearth Strip is required
under the front of the fireplace
Heat & Glo • RH-36/RH-42 • 4044-153 • Rev AC • 1/11
Raised Hearth Extension Framing
WARNING! Risk of Fire. A raised hearth extension built
flush with the fireplace opening (Figure 11.3) or less than
4 in. (102 mm) below the fireplace opening requires the
fireplace be installed on a non-combustible surface.
The hearth framing must be constructed of non-combus-
tible materials (Figure 11.2) and placed on 1/2 in. Micore,
or equivalent material (Figure 11.4). When creating the
platform, allow for the thickness of the non-combustible
finishing materials (Figure 11.5).
IMPORTANT! Hear th extension design must be
determined before installation of fireplace.
Non-combustible
Finishing Material
Non-combustible
Framing Material
Figure 11.3 Raised Platform Hearth Extension Detail
4 in.
Non-combustible
Framing Material
Figure 11.4 Raised Platform Hearth Extension-Framing Materials
Non-combustible
1/2 in. Micore
Protective Metal
or equivalent
Hearth Strips
insulation
1/2 in. Micore or
equivalent insulation
Material
Floor
39