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INSTALLING
Continued
12
Minimum Non Combustible Material Clearances
If Using Mantel
You must have non combustible material(s) above the fireplace opening. Non
combustible materials (such as slate, marble, tile, etc.) must be at least 1/2 inch
thick. With sheet metal, you must have non combustible material behind it. Non
combustible material must extend at least 8 inches up (for all models). If non
combustible material is less than 12", you must install the fireplace hood accessory
(24" model only). Even if non combustible material is more than 12", you may
need the hood accessory to deflect heat away from your mantel shelf. See chart
below and Figures 6 and 7 for minimum clearances.
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 14.
Non-Combustible
Material Distance (A)
12" or more
Between 8" and 12"
Less than 8"
Mantel Clearances
If you meet minimum clearance between mantel shelf and top of fireplace opening,
a hood is not required (see Figure 6).
Minimum Non-
Combustible
Material
Figure 6 - Minimum Mantel Clearances Without Using Hood
If above minimum clearances are not met, you must have a hood. Follow
minimum clearances shown in Figure 7 on page 13 when using hood.
Requirements for
Safe Installation
Non combustible material OK.
24" Model: Install fireplace hood accessory (GA6050
or GA6052, see Accessories, page 29).
18" Model: Non combustible material OK.
Non combustible 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.
Mantel Shelf
10"
8"
6"
1
2
"
/2
(A)
1 /2
12"
20"
24
"
3 /4
8"
14"
16
"
Minimum Non-
Distances to
Combustible
Underside of
Material Height
Mantel
Underside of
Mantel Shelf
All minimum
distances are
in inches
Log Set
1 /2
27
"
30"
24" Models
1 /2
18
"
20"
18" Model
Top of Fireplace
Opening
102783
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