MartinLogan VENT-FREE FIREPLACE SYSTEMS 33ISDG - Manual (Page 13)

23D8036 13
Combustible
Material
Non-combustible
Material
5"
1”
CLEARANCES and HEIGHT REQUIREMENTS
The gas log heater must be installed at least 5" above any combustible flooring material, such as carpeting or tile, which is
closer than 14" to the base of the fireplace. See Figure 10.
Figure 10 - Minimum Clearance above Combustible Flooring