I have the equipment nor the end of November for 109 purchased - which required 149 are now a bad joke! Ultimately make all oil radiators the same - In the heating ribs befindliches special oil is heated and irradiated as heat. The Delonghi 2500 watts and 12 heating ribs has of course due to the higher performance advantage, you want anyway my. For this issue 150, but would definitely be overkill. My advice is, it once with the 2,200 watt device to try by AEG or another, cheap oil radiator. If this is not sufficient, you can try with the DeLonghi it still. To the device itself: The power I felt was rather disappointing. Compared to other radiators it rather slowly heats up and a particularly high heating power, the unit has not actually. In addition, the Delonghi transpires from a nasty chemical smell that is not warped even after more than a week. I have returned the device again.