Heatilator • LM42 • Installers Manual • 4087-901 • Rev A • 04/14/16
37
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
A
Fireplace
Opening
B
Outside
Dimensions
in.
42
62
mm
1067
1575
LM42
Model #
D. Sidewalls/Surrounds
• Locate adjacent combustible sidewalls a minimum of 12
in. (305 mm) from fireplace opening.
• Mantle leg, surround, stub wall, whether combustible
or non-combustible, may be constructed as shown in
Figure 7.6.
Figure 7.6 Mantel Leg, Surround or Wall Projection (acceptable on both sides of opening)