Alva 3 Ceramic Panel Infrared Gas Heater Large - 3 Ceramic Panels With Variable Heat Settings, Oxygen Depletion Sensor With Flame Failure Protection Device , Heats Up Rooms With Size Up To 50sq/M , Heat Output 1.55kw â 4.2kw , Integrated Piezo Ignition Incorporated Into Gas Control Knob , Positive OFF At Gas Flow Control Valve , Fits All Industrial Cylinder Valves , Uses 9kg Gas Cylinder- Not Included , Retail Box , 1 Year Warranty