Heat & Glo HST-48D Owner's Manual page 40

E. Combustible Mantel
Section 7-3.3.3 of ANSI/NFPA211
F. Sidewalls/Surrounds
Figure 11.5 Mantel Leg or Wall Projections (acceptable on both sides of opening)
Non-combustible
Decorative Facing
such as: Steel, iron,
brick, tile, concrete,
slate, tile, plasters
Figure 11.4 Clearances to Mantels or other Combustibles above Fireplace
Gridlines at 1 in. scale
FLUSH
FRONT
11 3/8 in.
[289 mm]
12 in.
[305 mm]
Combustible Wall
2 x 4 stud wall
Standoffs
Seal joint with
non-combustible
sealant
42 in.
[1067 mm]
fireplace opening
47 in.
[1194 mm]
width of fireplace
[305 mm]
Combustible
Decorative Facing
12 in./305 mm
Mantel
12 in./305 mm
minimum
1 1/ 2 in. 6 in./152 mm
minimum
38 mm
maximum
Measured from top of fireplace opening
4 in.
BRICK
[102 mm]
FRONT
9 3/4 in.
[248 mm]
12 in.
7 ft (2134 mm)
minimum
base of fireplace
to ceiling