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D. Mantel and Wall Projections
A combustible mantel may be positioned no lower than
40 3/8 in. (1026 mm) from the base of the fireplace.
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
WARNING! Risk of Fire!
• You must seal around the finishing material to fireplace.
Combustible Wall
2 x 4 stud wall
Standoffs
1 1/ 2 in./38 mm
maximum
Non-combustible
Decorative Facing
such as: Steel, iron,
brick, tile, concrete,
slate, glass, plasters
DO NOT cover any air
openings in the face of
the fireplace.
Seal joint with
non-combustible
sealant to prevent heat
from being drawn into
the wall cavity
►
Figure 7.10 Mantel Specifications
28
Combustible
Decorative Facing
12 in./305 mm
Mantel
6 in./152 mm
minimum
Measured from top of fireplace opening
Heatilator • MHST36D Installation Manual • 4012-086 • Rev D • 03/17
7 ft (2134 mm)
minimum
base of fireplace
to ceiling
12 in./305 mm
minimum
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