Hearth and Home Technologies A42CH EN - Manual (Page 11)

Heatilator • A36C & A42C • 28396 Rev Y • 10/06 11
C. Sidewalls/Surrounds
Adjacent combustible side walls must be located a minimum of 12 in. (305 mm) from the fi replace opening. See Figure 3.3.
If you are using a decorative surround constructed of combustible material, it must be located within the shaded area de-
fi ned in Figure 3.3. Short stub walls are also acceptable if they are contained within the shaded area.
D. Frame the Fireplace
Figure 3.4 shows a typical framing (using 2 x 4 lumber) of the fi replace, assuming combustible materials are used. All re-
quired clearances to combustibles around the fi replace must be adhered to. See Figure 3.2. Any framing across the top of
the fi replace must be above the level of the top standoffs.
9-3/4 in.
(248 mm)
14-3/8 in.
(365 mm)
12 in.
(305 mm)
4 in.
(102 mm)
Brick
Front
Flush
Front
12 in.
(305 mm)
A
B
50 deg.
39 deg.
Figure 3.3 Sidewalls and Surrounds
23 in.
(584 mm)
41-1/2 in.
(1055 mm)
A
2 in. (51 mm)
min. air
clearance
to the
enclosure.
Note: Fireplace
header cannot be
positioned until
after the fireplace
assembly is in place.
41-1/2 in. (1055 mm)
header height.
Use only noncombustible
material below the top
of the front standoffs.
Figure 3.4 Framing the Fireplace
Model #
A
Fireplace Opening
B
Outside Dimensions
A36
in. 36 42
mm 914 1067
A42
in. 42 48
mm 1067 1219
Model # A
A36
in. 43
mm 1092
A42
in. 49
mm 1245