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INSTALLING
Continued
Minimum Non-Combustible Material Clearances (Continued)
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" up (for all models). If non-combus-
tible material is less than 12", you must install the fireplace hood accessory (24"
and 30" models 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 Acces-
sory for Vented Operation, page 13.
Non-Combustible
Material Distance (A)
12" or more
Between 8" and 12"
Less than 8"
Requirements for
Safe Installation
Non-combustible material okay.
24" or 30" Models: Install fireplace hood accessory
(GA6050 or GA6052, see Accessories, page 33).
18" Model: Non-combustible material okay.
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 Clearances
In addition to meeting non-combustible 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 f'weplace open-
ing, a hood is not required (see Figure 6).
Mantel Shelf Underside of
Mantel Shelf
j m_
MinimumNon- _ i
Combustiblfl ,, (A)
Matedal / 12" 20" 241,2• 271,2•
#
/ 8" 14" 163/4, 181Q"
/
All minimum
distances are
in inches
Log Set
30" _ 24"/30" Models
20" _ 18" Model
Top of Fireplace
_ / Opening
MinimumNon. Distancesto
Combustible Undersideof
MaterialHeight Mantel
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Figure 6. Minimum Mantel Clearances Without Using Hood
Continued _l_
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