Black Oil Filled RadiatorAn oil-filled radiator is an electrical heater that makes use of diathermic oils to warm the air around it. It takes longer than an electric radiator to warm up, however it can hold heat for much longer and is more energy efficient.
Black oil radiators can be easily moved around and are simple to use. They also include a thermostat and heat settings. The timer lets them be switched off at specific times throughout the night.