Heatilator Birmingham BIR42-B Installation Manual page 33

E. Mantel and Wall Projections
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Combustible Wall
2 x 4 stud wall
Standoffs
Non-combustible
Decorative Facing
such as:
Steel, iron, brick,
tile, concrete, slate,
glass, plasters.
DO NOT cover any
1 1/2 in./38 mm
air openings in the face
maximum
of the fireplace.
Measured from top of fireplace opening
WARNING:
Seal joint with non-combustible
sealant to prevent heat from being
drawn into the wall cavity.
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Heatilator • Birmingham 42-B Installation Manual • 4059-715 • Rev AD • 06/23
Combustible
7 ft (2134 mm)
Decorative Facing
base of fireplace
Grid represents
1 in. squares
12 in./305 mm
Mantel
22 in./559 mm
minimum
12 in./305 mm
minimum
6 in./152 mm
minimum
Non-Combustible Wall
Metal stud wall
above the fireplace up
to ceiling (7 ft. min.)
Standoffs
Non-Combustible
Decorative Facing
such as:
Steel, iron, brick,
tile, concrete, slate,
glass, plasters.
minimum
to ceiling
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Combustible
7 ft (2134 mm)
Decorative Facing
minimum
base of fireplace
to ceiling
12 in. Max.
(305 mm)
Deep
Non-combustible
Mantel
Metal support to stablize wall and mantel
12 in./305 mm
Non-combustible Non-combustible
22 in./559 mm
mantel or mantel or
non-combustible non-combustible
finishing material finishing material
may be positioned may be positioned
anywhere within anywhere within
the shaded area. the shaded area.
Measured from top of fireplace opening
Seal joint with non-combustible
sealant to prevent heat from being
drawn into the wall cavity.
Non-Combustible
Decorative Facing
to top of standoffs