10
103089
INSTALLING
Continued
Minimum Non Combustible Material Clearances
If Not Using Mantel
Note:
If using a mantel, go to page 11. If not using a mantel, follow the informa-
tion on this page.
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). See chart below and Figure 5 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 13.
Heat Resistant
Material
(A)
Figure 5 - Heat Resistant Material (Slate, Marble, Tile, etc.) Above Fireplace
NOTICE
Variable manually-controlled heaters may be used as a vented
product. If so, you must always run heater with chimney flue damper
open. If running heater with damper open, non-combustible material
above fireplace opening is not needed. Go to
Installing Damper
Clamp Accessory for Vented Operation, page 13.
Non-Combustible
Requirements for
Material Distance (A)
Safe Installation
12" or more
Non combustible material okay.
Between 8" and 12"
24" or 30" Models: Install fireplace hood acessory
(GLH100BL or GLH101BR, see
Accessories, page 29).
18" Model: Non combustible material okay.
Less than 8"
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.