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Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev G • 06/29/15
D. Sidewalls/Surrounds
• Locate adjacent combustible sidewalls a minimum of
24 in. (305 mm) from the fireplace opening.
• Mantel legs, surround, stub wall, whether combustible
or non-combustible, may be constructed as shown in
Figure 6.9.
18 1/2 in. [470 mm]
19 3/4 in. [500 mm]
4 in.
[102 mm]
50° angle
39° angle
24 in.
[610 mm]
BRICK
FRONT
FLUSH
FRONT
24 in.
[610 mm]
22 3/8 in. [568 mm]
52-7/8 in. (1343 mm)
42 in.
[1067 mm]
Note: Grid depicts 1 inch squares.
Figure 6.9 Mantel Leg, Surround or Wall Projections (accept-
able on both sides of opening)
7 ft (2134 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
1 1/2 in./38 mm
maximum
Mantel
22 in./559 mm
minimum
Combustible
Decorative Facing
Seal joint with
non-combustible
sealant
6 in./152 mm
minimum
12 in./305 mm
minimum
Grid represents
1 in. squares
Non-combustible
Decorative Facing
such as:
Steel, iron, brick,
tile, concrete, slate,
glass, plasters.
E. Mantel and Wall Projections
A combustible mantel may be positioned no lower than
63-3/4 in. (1619 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.
Figure 6.10 Mantel Specifications
