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120163-01A
10
INSTALLATION
Continued
Heat Resistant
Material
(A)
Figure 5 - Heat Resistant Material (Slate,
Marble, Tile, etc.) Above Fireplace
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"
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
Figures 5, 6 and 7 for minimum clearances.
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).
Determining Minimum Mantel Clearance
When Using a Hood
If minimum clearances in Figure 6 are not met, you
must have a hood. When using a hood there are
still certain minimum mantel clearances required.
Follow minimum clearances shown in Figure 7
when using hood.
Figure 6 - Minimum Mantel Clearances
Without Using Hood
Figure 7 - Minimum Mantel Clearances
When Using Hood
Noncombustible
Requirements for
Material Distance (A) Safe Installation
12" or more
Noncombustible
material OK.
Between 8" and 12"
24" Models:
Install fireplace hood
accessory (GA6050,
GA6052, GA6053, see
Accessories
, page 26).
18" Model: Noncom-
bustible 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 and damper
clamp installed.
Minimum Non-
Combustible
Material
Minimum Non-
Combustible
Material Height
Distances to
Underside of
Mantel
Top of Fireplace
Opening
Underside of
Mantel Shelf
12"
(A)
28"
34
1
/
2
" 38
5
/
8
" 42"
All minimum
distances are
in inches
2
1
/
2
"
6"
8"
10"
Mantel Shelf
Minimum Non-
Combustible
Material
8"
Min.
14
1
/
2
" 18
5
/
8
" 22
1
/
2
"
All minimum
distances are
in inches
26"
2
1
/
2
"
6"
8"
10"
12"
Distances to
Underside of
Mantel
Hood
(GA6050,
GA6052
or GA6053)
Top of Fireplace
Opening
Underside of
Mantel Shelf
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 12.
