The Fire Sense 10,000 BTU's Hammer Tone Bronze Tabletop Propane Gas Patio Heater (61322) is the most powerful tabletop patio heater on the market. With an output of 10,000 BTU's, it operates for up to three hours continuously on a standard 1 pound disposable propane tank (not included). Constructed of stylish powder-coated hammered bronze finish, this heavy-duty unit features a piezo ignition system. This superior patio heater is perfect for the serious outdoor entertainer. ETL approved.