An oil heater,also often known as a column heater,is a common form of convection heater used in domestic heating. The heat oil conservation is sealed inside the coils of the radiator.Since oil is heated only,never burned,and never to be replaced or refilled makes oil filled radiator heaters very efficient to operate.In addition,some heaters have safety caps to keep children and pets from contact with heating elements that radiate heat.They generally have a lower surface temperature than other heaters,and because of the large surface heater to heat the room at the same speed. Oil Filled Radiator Heater