Outdoor Lifestyles by Hearth & Home Technologies • Montana US-CAN • 4039-156 Rev AA • 10/12/15
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B. Finishing Material
• Combustible Material
Material which is made of or surfaced with wood,
compressed paper, plant fibers, plastics, or any material
capable of igniting and burning, whether flame proofed or
not, plastered or not plastered.
• Non-Combustible Material
Material which will not ignite and burn. Such materials are
those consisting entirely of steel, iron, brick, tile, concrete,
slate, glass or plasters, or any combination thereof.
• Non-Combustible Sealant Material
Sealants which will not ignite and burn: Rutland, Inc.
Fireplace Mortar #63, Rutland 76R, Nuflex 304, GE
RTV106 or GE RTV116 (or equivalent).
After completing the framing and applying the facing material
(drywall) over the framing, a bead of non-combustible seal-
ant must be used to close off any gaps at the top and sides
between the fireplace and facing to prevent cold air leaks.
Large gaps can be bridged with fiberglass rope gasket.
Only non-combustible materials may be used to cover the
black metal fireplace front.
Cat #
A
B
MONTANA-36
36 in./91.4 cm 42 in./106.7 cm
MONTANA-42
42 in./106.7 cm 48 in./121.9 cm
B
A
12 in.
[305 mm]
9 3/4 in.
[248 mm]
12 in.
[305 mm]
10 3/4 in.
[273 mm]
FLUSH
FRONT
4 in.
[102 mm]
BRICK
FRONT
50° angle
39° angle
Grid represents 1 in. scale
Figure 8.5 Sidewalls/Surrounds
Fire Risk
Do NOT obstruct air inlet or outlet grilles.
Do NOT modify grilles.
• Modifying or covering grilles could cause
temperature rise and fire hazard.
Finishing materials must not interfere with:
• Air flow through grilles or louvers
• Operation of louvers or doors
• Access for service
WARNING
Fire Risk
Finish all edges and fronts to clearances and
specifications.
• Metal fireplace front may be covered with
non-combustible material only.
• Do NOT overlap combustible materials onto
fireplace front.
• Install combustible materials up to specified
clearances on top front and side edges.
• Seal joints between the finished wall and
fireplace top and sides using only a 300° F
minimum sealant.
WARNING
C. Mantel
A combustible mantel may be positioned no lower than
12 in. (305 mm) above the top of the fireplace opening. 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 of the
fireplace opening. See Figure 8.4. Combustible trim must
not cover the metal surfaces of the fireplace. This mantel
clearance is in accordance with
Section 7-3.3.3 of ANSI/
NFPA211
.
D. Sidewalls/Surrounds
Adjacent combustible side walls must be located a minimum
of 12 in. (305 mm) from the fireplace opening. If you are us-
ing a decorative surround constructed of combustible ma-
terial, it must be located within the shaded area defined in
Figure 8.5. Short stub walls are also acceptable if they are
contained within the shaded area.
E. Glass Doors
This fireplace has been tested and listed for use with doors
as specified in Section 12.B. Fireplace Components. Please
refer to the manual packed with each set of doors for instal-
lation instructions.
12 in. (305 mm)
min.
12 in. (305 mm)
max.
Top of
Fireplace
Opening
Mantel
1-1/2 in.
(38 mm) max.
6 in. (152 mm) min.
Header
Standoff
6 ft (1829mm) minimum
base of fireplace to ceiling
Figure 8.4 Mantel Specifications
Fire Risk
• Maintain clearances.
• Use only non-combustible material below
standoffs, material such as cement board is
acceptable.
WARNING
• Framing or finishing material used on the front of, or
in front of, the appliance closer than the minimums
listed, must be constructed entirely of noncombustible
materials (i.e., steel studs, concrete board, etc.).
