This is the largest space heater in the range from Clarke the XR160 with a very impressive 160,000Btu heat output. The XR160 model comes on an easily manoeuvrable wheeled stand and has a stainless steel combustion chamber for long life. Safety features include automatic flame failure detection; to shut down the unit should flame failure occur. The large 53 litre fuel tank allows the unit to run for 13 hours continuously. Please note these types of heaters can only be used in well ventilated areas.