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This heater has been an absolute lifesaver! Being a student I have lived in some pretty cold flats/houses and this bad boy has kept my heart from circulating blood slushy. The heater has a range of power settings to allow you to use it at most temperatures. It is also wall mountable, therefore a great buy to put into a room that lacks enough heating power from a regular radiator. I purchased mine at the price of £30 and I have never looked back since then. 2 years on from buying it, it still works just as good. With a correctly used plug timer I kept my, what would have been, damp cold room warm enough to work and live. In terms of running the heater, the costs are quite low, even considering I use EDF energy's pay card system, which is slightly pricey.
A great buy at around £20 if you need a heater.