50K - 200K BTU Propane Convection HeaterThe Dyna Glo 200,000 BTU Portable Convection Tower Propane Heater boasts a 360 heat radius and 3 heat settings to effectively warm areas up to 4,700 sq. ft. The one hand piezo ignition allows for a speedy startup, while the auto safety shut off and non slip base ensure safe and stable operation. With variable heat settings of 50,000, 120,000, and 200,000 BTUs hour, this heater can keep you warm and comfortable in any situation. It can run for 43 hours