The Fire Sense Stainless Steel Commercial Propane Gas Patio Heater (01775) is the most powerful patio heater on the market. With the output of a 46,000 BTU burner, it can operate for up to ten hours continuously on a standard 20-pound propane tank (not included). Constructed of high-grade stainless steel, this heavy-duty unit features an electronic ignition system and wheels for easy mobility. This superior patio heater is perfect for the serious outdoor entertainer. ETL approved.