Comfortflame.US.com
900563-00NC
11
INSTALLATION
Continued
CAUTION: Do not allow the vent-free gas log heater
to touch or extend beyond the fireplace screen.
NOTICE: Surface temperatures of adjacent walls and
mantels become hot during operation. Walls and
mantels above the firebox may become hot to the
touch. If installed properly, these temperatures meet
the requirement of the national product standard. Fol-
low all minimum clearances shown in this manual.
NOTICE: If your installation does not meet the minimum
clearances shown, you must do one of the following:
• raise the mantel to an acceptable height
• remove the mantel
BUILT-IN FIREBOX INSTALLATION
Built-in installation of this firebox involves installing firebox into a
framed-in enclosure. This makes the front of firebox flush with wall.
Optional brass trim accessories are available (see Accessories, page
18). The brass trim will extend past sides of firebox approximately
1/2". This will cover the rough edges of the wall opening. If installing
a mantel above the firebox, you must follow the clearances shown
in Figure 7. Follow the instructions below to install the firebox in
this manner.
1. Frame in rough opening. The firebox framing should be con-
structed of 2 x 4 lumber or heavier. Use dimensions in Table 1
and rough opening layout in Figure 8a. Adjust framing so that
firebox flushes with finished wall surface. If installing in a corner,
use dimensions in Figures 8b, 8c and 8d for rough opening.
2. Install gas piping to firebox location. See Installing Gas Line, page
12 and Connecting to Gas Supply in log set owner’s manual.
Figure 7 - Minimum Mantel Clearances for Built-In Installation
Supplied
Firebox Hood
Must Be Used
at All Times
Wire-mesh
Screen
Firebox
Noncombustible
Material May
Project Off this
Surface above
the Firebox Hood
Mantel Shelf
Note: Any portion of the
mantel shelf must NOT
extend beyond this profile.
12" 16" 20"
1
1
/
2
"
6
3
/
4
"
12"
Note: All vertical
measurements are
from top of fireplace
hood opening to
bottom of mantel shelf.
These minimum
clearances replace any
other recommended
clearances supplied
with your ANSI Z21.11.2
approved gas logs.
Wall board or facing
material (above
firebox) may be of
combustible material,
including decorative
mantel ornaments or
other similar projec-
tions off of the facing
material.
Framing
Material
Rough Opening Dimensions for
Built-in Installation
Model
Front Width
(Inside to Inside) Height
Depth
(Min.)
32"
34
1
/
2
"
36
5
/
8
" 16
5
/
8
"
36"
41
3
/
8
"
40
1
/
4
" 21
1
/
8
"
42"
48
1
/
4
"
43
3
/
4
" 23
1
/
2
"
Table 1
Depth
(Minimum)
Width
(Inside to Inside)
Height
Figure
8a
55
5
/
8
"
39
3
/
8
"
34
1
/
2
"
27
3
/
4
"
0" CLEARANCE
0" CLEARANCE
*10
1
/
2
"
*10
1
/
2
"
*14
1
/
2
"
50
3
/
8
"
71
1
/
4
"
35
5
/
8
"
41
3
/
8
"
0" CLEARANCE
48
1
/
4
"
82"
58"
*17"
41"
*17"
FOR 32" MODELS
FOR 36" MODELS
FOR 42" MODELS
Figure
8b
Figure
8c
Figure
8d
* These dimensions allow for min. Clearances to a 45° projected
side wall. However, clearances to projected mantel trims and facings
are allowed within a min. Of 16" to a perpendicular wall as shown in
figure 6, on page 10.
Figure 8 - Rough Opening Dimensions
