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MINIMUM NONCOMBUSTIBLE
MATERIAL CLEARANCES
If Not Using Mantel
Note: If using a mantel, proceed to If Using
Mantel. If not using a mantel, follow the infor-
mation below.
You must have noncombustible material(s)
above the fireplace opening. Noncombustible
materials (such as slate, marble, tile, etc.)
must be at least 1/2" thick. With sheet metal,
you must have noncombustible material be-
hind it. Noncombustible material must extend
at least 8" up (for all models). If noncombus-
tible material is less than 12", you must install
the fireplace hood accessory. See Figure 5 for
minimum clearances.
Noncombustible
Material
Requirements for Safe
Distance (A)
Installation
12" or more
Noncombustible material
okay.
Between 8"
Install fireplace hood and
12" accessory (GA6050,
GA6052 or GA6053 see
Accessories, page 27).
Less than 8"
Noncombustible mate-
rial must be extended to
at least 8". See Between
8" and 12", above. If you
cannot extend material,
you must operate heater
with flue damper open.
Heat Resistant
Material
Figure 5 - Heat Resistant Material (Slate,
Marble, Tile, etc.) Above Fireplace
10
INSTALLATION
Continued
If Using Mantel
You must have noncombustible material(s)
above the fireplace opening. Noncombustible
materials (such as slate, marble, tile, etc.) must
be at least 1/2" thick. With sheet metal, you
must have noncombustible material behind it.
Noncombustible material must extend at least
8" up. If noncombustible material is less than
12", you must install the fireplace hood acces-
sory. Even if noncombustible material is more
than 12", you may need the hood accessory to
deflect heat away from your mantel shelf. See
Figures 5 and 6 and Figure 7 on page 11 for
minimum clearances.
MANTEL CLEARANCES
In addition to meeting noncombustible mate-
rial clearances, you must also meet required
clearances between fireplace opening and
mantel shelf. If you do not meet the clearances
listed below, you will need a hood.
Determining Minimum Mantel Clearance
If you meet minimum clearance between
mantel shelf and top of fireplace opening, a
hood is not required (see Figure 6).
Minimum
Noncombustible
Material
(A)
Figure 6 - Minimum Mantel Clearances
Determining Minimum Mantel Clearance
when Using a Hood
If minimum clearances in Figure 6 are not
met, you must have a hood. When using a
hood there are still certain minimum mantel
clearances required. Follow minimum clear-
ances shown in Figure 7, page 11, when
using a hood.
www.desatech.com
Mantel Shelf
10"
8"
6"
2
1
/
"
2
(A)
12"
18" 20"
Minimum
Distances to
Noncombustible
Underside of
Material Height
Mantel
Without Using Hood
Underside
of Mantel
Shelf
All
minimum
distances
are in
inches
22"
24"
Top of
Fireplace
Opening
122493-01C
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