19
Heatilator • GBST4336I, • 2135-900 Rev. L • 12/15
D. Mantel and Wall Projections
WARNING! Risk of Fire!
Comply with all minimum clear-
ances as speci
fi
ed. Framing or
fi
nishing material closer than
the minimums listed must be constructed entirely of noncom-
bustible materials (i.e., steel studs, concrete board, etc).
GBST4336I Mantel Projection
Note:
All
measurements
in inches.
Figure 5.4 Minimum Vertical and Maximum Horizontal
Dimensions of Combustibles
MEASUREMENTS FROM
TOP EDGE OF THE OPENING
5
10
11
12
2-1/2
13
14
15
16
17
18
19
32
TO CEILING
9
10
11
12
8
7
6
5
4
3
25
18
MAX.
MIN.
MEASUREMENTS FROM
TOP EDGE OF THE OPENING
10
11
12
18
9
8
7
6
1
2
3
4
5
6
12
32
MAX.
MIN.
TO CEILING
GBST4336I Mantel Projection
Note:
All
measurements
in inches.
Figure 5.6 Minimum Vertical and Maximum Horizontal
Dimensions of Non-Combustibles
TOP VIEW
3-1/4 in. Min.
2-3/4
in. Min.
1/2 in.
Min.
Unlimited
1 in.
Max.
FIREPLACE
OPENING
Figure 5.8 Clearances to Combustible Mantel Legs or Wall
Projections (Acceptable on both sides of opening.)
Note: Clearance from
opening to perpendicular
wall.
Combustible Mantel Legs or Wall Projections
Figure 5.9 Non-Combustible Zone
SHEETROCK
AIR SPACE REQUIRED
3-1/4 in.
