FLOOR CLEARANCE
The gas log heater must be installed at least 13/8" above any combustible flooring material, such as carpeting or tile, which is closer than 14" to the base of the fireplace. The minimum distance must be maintained from the top surface of carpeting, tile, etc. See Figure 11.
OR
The gas log heater may be installed nearer to the floor if a minimum of 14" of noncombustible material such as slate or marble is installed between the base of the fireplace and the combustible flooring. See Figure 12.
Heater in
Fireplace or
Firebox
Combustible
Material
13/8" Minimum
Figure 11 - Minimum Clearance above Combustible Flooring
This Distance May Now Be Less than 13/8"
Heater in
Fireplace or
Firebox
Combustible
Material
14" Minimum 
Figure 12 - Minimum Clearance above Combustible Flooring with
Noncombustible Material Installed at Base of Fireplace
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