www.desatech.com
116746-01A
12
Rough Opening Dimensions for
Built-in Installation
Front Width
(Inside to
Depth
Model
Inside)
Height (Minimum)
36"
41
1
/
2
"
40
1
/
2
"
20
3
/
4
"
1. Frame in rough opening. The firebox framing
should be constructed of 2 x 4 lumber or heavier.
Use dimensions in Table 1 and rough opening
layout in Figure 8. Adjust framing so that firebox
flushes with finished wall surface. If installing
in a corner, use dimensions in Figures 8 and 9
for rough opening.
2. Install gas piping to firebox location. See
Installing
Gas Piping to Fireplace Location
on page 13 and
Connecting Fireplace to Gas Supply,
page 15.
IMPORTANT:
If installing blower accessory
(circulating models with louvers only), see
Hard-
Wiring Firebox
, page 18.
3. Carefully set firebox in front of rough open-
ing with back of firebox inside wall opening.
IMPORTANT:
If installing a perimeter trim
kit, see instructions included with trim acces-
sory. You must install shoulder screws from
trim kit now.
4. Carefully insert firebox into rough opening.
5. Attach firebox to wall studs using nails or
wood screws through holes in nailing flange
(see Figure 10).
6. If using an optional perimeter trim kit, install
the trim after final finishing and/or painting
of wall. See instructions included with trim
accessory for attaching trim.
7. Install and properly test gas log heater. Fol-
low installation instructions included with
the vent-free gas log heater that is being
installed.
IMPORTANT:
When finishing your firebox,
combustible materials such as wall board, gypsum
board, sheet rock, drywall, plywood, etc. may be
butted up next to the sides and top of the firebox.
Combustible materials should never overlap the
firebox front facing.
WARNING: Do not allow any
combustible materials to overlap
the firebox front facing.
IMPORTANT:
Noncombustible materials such as
brick, tile, etc. may overlap the front facing, but
should never cover any necessary openings like
louvered slots.
WARNING: Do not allow non-
combustible materials to cover
any necessary openings like
louvered slots.
INSTALLATION
Continued
Figure 8 - Rough Opening for Installing
in Wall
Depth
(Minimum)
Width
(Inside to Inside)
Height
37"
41
1
/
2
"
52
11
/
32
"
74"
TOP VIEW
FOR 36"
MODELS
Figure 9 - Rough Opening for Installing
in Corner Wall
WARNING: Use only noncom-
bustible mortar or adhesives
when overlapping the front fac-
ing with noncombustible facing
material.
Figure 10 - Attaching Firebox to Wall
Studs
Nailing
Flange
Nails or
Wood
Screws
