Listed outdoor cooking appliances shall
be installed in accordance with their listing and the manufacturer's
installation instructions.
Unlisted outdoor cooking appliances
shall be installed outdoors with clearances to combustible
material of not less than 36 inches (914 mm) at the sides and
back and not less than 48 inches (1219 mm) at the front. In no
case shall the appliance be located under overhead combustible
construction. [NFPA 54:10.20.2]