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If Using Mantel
You must have noncombustible material(s)
above the fireplace opening. Noncombus-
tible materials (such as slate, marble, tile,
etc.) must be at least 1/2" thick. With sheet
metal, you must have noncombustible ma-
terial 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.
IMPORTANT: If you cannot meet these mini-
mum clearances, you must operate heater
with chimney flue damper open. Go to Install-
ing Damper Clamp Accessory for Vented
Operation, page 12.
Noncombustible
Material Distance (A)
12" or more
Between 8"
and 12"
Less than 8"
Heat Resistant
Material
Figure 5 - Heat Resistant Material (Slate,
Marble, Tile, etc.) Above Fireplace
116412-01E
INSTALLATION
Requirements for Safe
Installation
Noncombustible mate-
rial OK.
2 4 " M o d e l s : I n s t a l l
fireplace hood acces-
sory (GA6050, GA6052,
GA6053, see Accesso-
ries, page 27).
18" Model: Noncombus-
tible material OK.
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.
(A)
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Continued
Minimum
Noncombustible
Material
Figure 6 - Minimum Mantel Clearances
Minimum
Noncombustible
Material
Figure 7 - Minimum Mantel Clearances
MANTEL CLEARANCES
In addition to meeting noncombustible mate-
rial 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 clear-
ances required. Follow minimum clearances
shown in Figure 7 when using hood.
Mantel Shelf
10"
8"
6"
2
/
"
1
2
(A)
12"
28" 34
/
" 38
1
2
Minimum
Distances to
Noncombustible
Underside of
Material Height
Mantel
Without Using Hood
12"
10"
8"
6"
2
1
/
"
2
8"
14
1
/
" 18
5
/
2
Min.
Hood
Distances to
(GA6050,
Underside of
GA6052
Mantel
or GA6053)
When Using Hood
Underside of
Mantel Shelf
All minimum
distances
are in inches
/
" 42"
5
8
Top of
Fireplace
Opening
Underside of
Mantel Shelf
All minimum
distances
are in inches
" 22
1
/
"
26"
8
2
Top of
Fireplace
Opening
11
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