Sidewalls/Surrounds; Frame The Fireplace - Heatilator ST42A Owner's Manual

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.
Figure 3.3
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.
You must maintain
2 in. (51 mm) min. air space
clearance from the
chimney to the
enclosure.
27 in.
(686 mm)
Figure 3.4 Framing the Fireplace
Flush
14-3/8 in.
Front
(365 mm)
50 deg.
12 in.
(305 mm)
Sidewalls and Surrounds
48 in.
(1219 mm)
39-1/8 in. (994 mm)
Heatilator • ST42A • 35038 Rev G • 02/05
Brick
(102 mm)
Front
42 in.
(1067 mm)
(248 mm)
(opening)
48 in.
(1219 mm)
(framing)
12 in.
(305 mm)
12 in. (305 mm) max.
Note: Fireplace
Header cannot be
positioned until after
the fireplace assembly
is in place.
4 in.
9-3/4 in.
37 deg.
11