Oil-filled heaters, also called radiators, feature a sealed reservoir filled with special oil. A heating element heats the oil, which can stay warm for a long time after the heating element is turned off. Most of them also include thermostats that turn the unit off when the air reaches desired temperature and back on when it cools down.
Oil-filled radiators are ideal for bedrooms, where they can keep you warm throughout the night. This will allow you to turn off your central heating system overnight and save money on your heating bill.
To learn more about different types of heaters and for hints on how to choose a heater that is right for you, please visit our Space Heaters Information Page.