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E. Combustible Mantel
• See Figure 11.11.
• A combustible mantel may be positioned no
lower than 12 in. (305 mm) above the top of the
fi replace opening.
• A combustible mantel may have a maximum
depth of 12 in. (305 mm).
• Combustible trim and materials cannot be placed
within 6 in. (152 mm) of the fi replace opening
(top or sides).
• Combustible materials projecting more than
1-1/2 in. (38 mm) shall not be placed within
12 in. (305 mm) from the top of the fi replace
opening.
• Combustible trim must not cover the metal
surfaces of the fi replace.
• Mantel clearance is in accordance with Section
7-3.3.3 of ANSI/NFPA211.
6 ft (1829 mm
MINIMUM
base of fireplace
to ceiling
Combustible Wall
2 x 4 stud wall
Standoffs
Measured from top of fireplace opening
12 in./305 mm MAXIMUM
12 in.305 mm MINIMUM
Combustible Decorative Facing
Noncombustible
Decorative Facing
Seal joint with
noncombustible
sealant
Figure 11.11 Clearances to Mantels or other Combustibles above Fireplace
F. Sidewalls/Surrounds
• Adjacent combustible sidewalls must be located
a minimum of 12 in. (305 mm) from the fi replace
opening.
• Combustible or noncombustible mantel legs,
surrounds and stub walls may be constructed
per Figure 11.12.
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 11.12 Mantel Leg or Wall Projections (acceptable on both sides of opening)
Model #
A
Fireplace Opening
B
Outside Dimensions
A36
in. 36 42
mm 914 1067
A42
in. 42 48
mm 1067 1219
Heatilator • A36C & A42C • 28396 • Rev AG • 11/08
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