12
102653
Minimum Non-
Combustible
Material
Minimum Non-
Combustible
Material Height
Distances to
Underside of
Mantel
Top of Fireplace
Opening
Underside of
Mantel Shelf
12"
8"
(A)
20"
14"
24
1/2
"
16
3/4
"
27
1/2
"
18
1/2
"
30"
20"
All minimum
distances are
in inches
Log Set
24"/30" Models
18" Model
2
1
/2
"
6"
8"
10"
INSTALLING
Continued
Minimum Noncombustible Material Clearances
If Using Mantel
You must have noncombustible material(s) above the fireplace opening. Noncom-
bustible materials (such as slate, marble, tile, etc.) must be at least 1/2 inch thick.
With sheet metal, you must have noncombustible material behind it. Noncombus-
tible material must extend at least 8 inches up (for all models). If noncombustible
material is less than 12", you must install the fireplace hood accessory (24" and 30"
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 chart below and
Figures 7 and 8 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.
Figure 7 - Minimum Mantel Clearances Without Using Hood
Noncombustible
Requirements for
Material Distance (A)
Safe Installation
12" or more
Noncombustible material OK.
Between 8" and 12"
24" or 30" Models: Install fireplace hood
accessory (GA6050 or GA6052, see
Accessories, page 35).
18" Model: Noncombustible 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.
Mantel Clearances
If you meet minimum clearance between mantel shelf and top of fireplace opening,
a hood is not required (see Figure 7).
Mantel Shelf
If above minimum clearances are not met, you must have a hood. Follow
minimum clearances shown in Figure 8 on page 13 when using hood.
