Non-Combustible Sealant Material; Mantel And Wall Projections; Sidewalls/Surrounds - Heatilator FL92 Installation Manual

C. Non-Combustible Sealant Material
After completing the framing and applying the facing
materials over the framing, a bead of noncombustible
sealant must be used to close off any gaps at the top
and sides between the fireplace and hearth.
WARNING! Risk of Fire!
Hearth & Home Technologies is not responsible for
discoloration, cracking or other material failures of
finishing materials due to heat exposure or smoke.
• Choose finishing materials carefully.
D. Mantel and Wall Projections
A combustible mantel may be positioned no lower than
42 1/2 in. (1080 mm) from the base of the fireplace (Fig-
ure 7.10).
The combustible mantel may have a maximum depth of
12 in. (305 mm). Combustible trim pieces that project no
more than 1 1/2 in. (38 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
E. Sidewalls/Surrounds
• Locate adjacent combustible sidewalls a minimum of
12 in. (305 mm) from fireplace opening.
• Mantle leg, surround, stub wall, whether combustible
or non-combustible, may be constructed as shown in
Figure 7.11.
11.92 in.
[303 mm]
FLUSH
FRONT
12 in.
[305 mm]
Figure 7.11 Mantel Leg, Surround or Wall Projection (acceptable on both sides of opening)
36 in.
[914 mm]
(fireplace opening)
40 in.
[1016 mm]
Heatilator • FL92 Installation Manual • 4012-081 • Rev C • 10/03/13
Combustible Wall
2 x 4 stud wall
Standoffs
Non-combustible
Decorative Facing
such as: Steel, iron,
brick, tile, concrete,
slate, tile, plasters
1 1/2 in./38 mm
maximum
Seal joint with
Measured from top of fireplace opening
non-combustible
sealant
Figure 7.10 Mantel Specifications
36 in.
[914 mm]
(fireplace opening
40 in.
[1016 mm]
7 ft (2134 mm)
base of fireplace
Combustible
Decorative Facing
Grid represents 1 in. squares
12 in./305 mm
Mantel
14 1/4 in./362 mm
minimum
12 in./305 mm
minimum
6 in./152 mm
minimum
4 in.
[102 mm]
9 3/4 in.
[248 mm]
BRICK
FRONT
12 in.
[305 mm]
minimum
to ceiling
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