Lava Heat Italia - AMAZON-140 - KD Patio Heater - Hammered Black Finish - Propane Configuration Constructed of Stainless Steel with a Hammered Black Finish 360-degree distribution of heat in a 5 ft. radius generating an impressive 56,000 BTUs Weather resistant 4 ft. Borosilicate glass tube is capable of withstanding extremely high temperatures. Coverage Area - Approximately 36 sq. ft Can be used for up to 12 hours with a 20 lb. propane tank. Construction- solid steel, aluminum, and 304 grade stainless steel CSA Certified heater has Lava Heat Italia's signature Tilt Switch Auto-Shutoff for total safety