www.desatech.com
113101-01E
9
LOG SIzING REQUIREMENTS
Minimum Firebox Size
Log
Front
Rear
Size Height Depth Width Width*
18"
1"
14"
4"
0"
4"
1"
14"
8"
1"
MINIMUM FIREpLACE CLEARANCE
TO COMBUSTIBLE MATERIALS
Log Size
Side Wall
Ceiling
18", 4"
1"
4"
*Measured at 14" Depth
Carefully follow the instructions below. This will
ensure safe installation into a masonry, UL127-
listed manufactured fireplace or certified vent-free
firebox.
Minimum Clearances For Side
Combustible Material, Side Wall and
Ceiling
A. Clearances from the side of the fireplace
cabinet to any combustible material and wall
should follow diagram in Figure 4.
Example:
The face of a mantel, bookshelf,
etc. is made of combustible material and
protrudes 3
1
/
2
" from the wall. This combus-
tible material must be 4" from the side of the
fireplace cabinet (see Figure 4).
Note:
When installing your gas logs into
a manufactured firebox, follow firebox
manufacturer’s instructions for minimum
clearances to combustible materials.
B. Clearances from the top of the fireplace
opening to the ceiling should not be less
than 42".
Figure 4 - Minimum Clearance for
Combustible to Wall
*Minimum 16" from Side Wall
*
Example
INStALLAtION
Continued
NOTICE: Manual control heaters
may be used as a vented product.
If so, you must always run heater
with chimney flue damper open. If
running heater with damper open,
noncombustible material above fire
-
place opening is not needed. Go to
Installing Damper Clamp Accessory
for Vented Operation
, page 12.
Minimum Noncombustible Material
Clearances
If Not Using Mantel
Note:
If using a mantel, proceed to
If Using
Mantel
, page 10. If not using a mantel, follow the
information 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 behind it. Noncombustible material must
extend at least 8" up (for all models). If noncom-
bustible material is less than 12", you must install
the fireplace hood accessory (24" model only). See
Figure 5 for minimum clearances.
Noncombustible
Material
Requirements for
Distance (A)
Safe Installation
1" or more
Noncombustible material okay.
Between 8"
24" Model:
Install fireplace
and 1"
hood accessory (GA050,
GA05 or GA053,see
Accessories
, page 31).
18" Model:
Noncombustible
material okay.
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.
Heat Resistant
Material
(A)
Figure 5 - Heat Resistant Material (Slate,
Marble, Tile, etc.) Above Fireplace
