www.desatech.com
110882-01K
10
MINIMUM NONCOMBUSTIBLE
MATERIAL CLEARANCES
If Not Using Mantel
Note:
If using a mantel proceed to If Using Man
-
tel. If not using a mantel, follow the information
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 inch thick.
With sheet metal, you must have noncombustible
material behind it. Noncombustible material must ex
-
tend at least 8" up (for all models). If noncombustible
material is less than 12", you must install the fireplace
hood accessory (24", 30" and 36" Models Only).
See Figure 5 for minimum clearances.
INSTALLATION
Continued
Heat Resistant
Material
(A)
Figure 5 - Heat Resistant Material (Slate,
Marble, Tile, etc.) Above Fireplace
Noncombustible
Requirements
Material Distance (A) for Safe Installation
12" or more
Noncombustible
material OK.
Between 8" and 12"
24", 30" or 36" Models:
Install fireplace hood
accessory (GA6050,
GA6052 or GA6053
see
Accessories
,
page 42).
18" Model:
Noncombustible
material OK.
Less than 8"
Noncombustible material
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.
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 non
-
combustible material behind it. Noncombustible
material must extend at least 8" up (for all models).
If noncombustible material is less than 12", you
must install the fireplace hood accessory (24", 30"
and 36" Models Only). Even if noncombustible
material is more than 12", you may need the hood
accessory to deflect heat away from your mantel
shelf. See Figure 6 and Figure 7, page 11, for
minimum clearances.
IMPORTANT:
If you cannot meet these minimum
clearances, you must operate heater with chimney
flue damper open. Go to
Installing Damper Clamp
Accessory for Vented Operation
, page 11.
MANTEL CLEARANCES
In addition to meeting noncombustible material
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).
Figure 6 - Minimum Mantel Clearances
Without Using Hood
Minimum Non-
Combustible
Material
Minimum Non-
Combustible
Material Height
Distances to
Underside of
Mantel
Top of
Fireplace
Opening
Underside of
Mantel Shelf
12"
8"
(A)
18"
14"
20"
17"
22"
19"
24"
20"
All minimum
distances are
in inches
Log Set
24"/30"/36"
Models
18" Model
2
1/2
"
6"
8"
10"
Mantel Shelf
