DeLonghi EW7507EB Digital OilFilled Radiator The DeLonghi EW7507EB OilFIlled Radiator automatically regulates the temperature by cycling between high, medium, and low. This maintains a constant comfort level, while saving energy. The double function timer allows you to program two different times, so you can set it for the morning and night. This heater automatically turns on when the room temperature drops below the set temperature with antifreeze setting, and if it becomes too warm, it automatically turns off with safety thermal cutoff.