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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 on this page.
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. If noncombustible material is
less than 12", you must install the fireplace
hood accessory. See Figure 5 for minimum
clearances.
Noncombustible
Material
Distance (A)
12" or more
Between 8" and 12" Install fireplace hood
Less than 8"
Heat Resistant
Material
Figure 5 - Heat Resistant Material (Slate,
Marble, Tile, etc.) Above Fireplace
123220-01C
INSTALLATION
Requirements for Safe
Installation
Noncombustible mate-
rial OK.
accessory (GA6050,
GA6052 or GA6053 see
Accessories, page 35).
Noncombustible mate-
rial must be extended
to at least 8". See
Between 8" and 12",
above. If you cannot ex-
tend material, you must
operate heater with flue
damper open.
(A)
www.desatech.com
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 be-
hind it. Noncombustible material must extend
at least 8" up. If noncombustible material is
less than 12", you must install the fireplace
hood accessory. 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, page 9, for minimum clearances.
IMPORTANT: If you cannot meet these mini-
mum clearances, you must operate heater
with chimney flue damper open. Go to Install-
ing Damper Clamp Accessory for Vented
Operation, page 12.
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
Figure 6 - Minimum Mantel Clearances
Mantel Shelf
10"
8"
6"
2
1
"
/2
(A)
12"
18" 20" 22" 24"
Minimum Non-
Distances to
Combustible
Underside of
Material Height
Mantel
Without Using Hood
Underside of
Mantel Shelf
All minimum
distances are
in inches
Log Set
24"/30"
Models
Top of
Fireplace
Opening
11
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