www.desatech.com
116986-01B
9
INSTALLATION AND CLEARANCES
FOR VENT-FREE OPERATION
WARNING: Maintain the
minimum clearances. If you can,
provide greater clearances from
floor, ceiling and adjoining wall.
INsTallaTIoN
Continued
Carefully follow the instructions below. This will
ensure safe installation into a masonry, UL127-
listed manufactured fireplace or listed vent-free
firebox enclosure.
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
LOG SIZING REQUIREMENTS
Minimum Firebox Size
Log
Size
Height Depth
Front
Width
Rear*
Width
18"
0"
14"
35"
1
/
"
4"
0"
14"
35"
1
/
"
MINIMUM FIREPLACE
CLEARANCE TO
COMBUSTIBLE MATERIALS
Log Size
18" or 4"
Side Wall
16"
Ceiling
4"
Floor
5"
*Measured at 14" depth
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 informa
-
tion below.
You must have noncombustible material(s) above
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"
models only). See Figure 5, page 10, for minimum
clearances.
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. 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, 6 and 7,
page 10, for minimum clearances.
