Mantel And Wall Projections; Finishing The Hearth Extension - Quadra-Fire 7100FP-GD-B Installation Manual

C. Mantel and Wall Projections
A combustible mantel may be positioned no lower than 60
in. (1524 mm) from the base of the fireplace.
Refer to Section 3 for reduced mantel height allowances.
The combustible mantel may have a maximum depth of
12 in. (305mm). Combustible trim pieces that project no
more than 3/4 in. (19 mm) from the face of the fireplace
can be placed no closer than 6 in. (152 mm) from the top
or side of the decorative front. Combustible trim must not
cover:
• the metal surfaces of the fireplace
• where the non-combustible board is placed over the
metal surfaces
• the space between the metal face of the fireplace and
framing members
Mantel
Trim
60 in.
(1524 mm)
48 in.
(1219 mm)
Figure 7.2 Mantel Specifications - Combustible Mantel
A noncombustible mantel may be positioned no lower
than 46 in. (1168 mm) from the base of the fireplace.
Noncombustible framing materials must be used above
the fireplace to a height of 84 in. (2134 mm) or to the
ceiling from the base of the fireplace for all construc-
tion materials, framing members, sheeting, and all finish
materials.
Clearances are from
bottom of appliance to
Noncombustible lower edge of mantel
or trim
Mantel
All construction materials, framing
members, sheeting and finish
materials MUST be noncombustible.
46 in.
(1168 mm)
Figure 7.2 Mantel Specifications - Non-Combustible Mantel
Ceiling/enclosure
36 in. (914 mm)
Clearances are from
bottom of appliance to
lower edge of mantel
or trim
Quadra-Fire • 7100 FP • 433-3610 Installation Manual • Rev G • 5/27/14
D. Finishing the Hearth Extension
WARNING! Risk of Fire!
bers or other burning material falling from the fireplace
may ignite flooring or concealed combustible surfaces.
• Protective metal hearth strips MUST be installed.
• Hearth extensions MUST be installed exactly as
specified.
A hearth extension must be installed with all fireplaces to
protect the combustible floor in front of the fireplace from
both radiant heat and sparks.
• You MUST use a hearth extension with this fireplace.
• Refer to Figure 7.4 for minimum dimensions.
• This fireplace has been tested and approved for use with
a hearth extension insulated to a minimum R value of
2.06.
• The hearth extension material MUST be covered with
tile, stone or other non-combustible material.
• Manufactured hearth materials will usually have a
published R value (resistance to heat) or k value
(conductivity of heat). Refer to the formula in Table 7.1
to convert a k value to an R value,
• Refer to Table 7.2 for hearth extension insulation
alternatives.
Table 7.1
R = 1/k x inches of thickness
Table 7.2
Hearth Extension Insulation Alternatives, R Value = 2.06
Material
Hearth & Home HX3, HX4
USG Micore 300™
USG Durock™ Cement Board
Cement Mortar
Common Brick
Ceramic Tile
Armstrong™ Privacy Guard Plus
Marble
High temperatures, sparks, em-
Minimum
k per inch r per inch thickness
thick thick required
0.49 2.06
0.49 2.06
1.92 0.52
5.0 0.20 10 1/2 in.
5.0 0.20 10 1/2 in.
12.50 0.08 25 3/4in.
0.46 2.18
14.3-20.0 0.07-0.05 29 1/2 - 41 1/4 in.
1 in.
1 in.
4 in.
1 in.
37