Esspee
*Ro60*. I am assuming this is the type of mini heater you are referring to. They plug in directly without a cable.
They are a complete scam. Do not waste your money.
I purchased a pair of these some three years back, before I moved. I was worried about the boiler in the flat to which I was moving, and was scared at being left without any heating. That turned out fine, boiler was fine and serviced.
So, did not even take these heaters out of their boxes. However, last year I 'donated' them to our flats' Management Cttee, for any meeting that was held in entrance lobby area. We used them for our AGM last March, and I can only say they worked very well. No trailing wires, going directly into leccie points, remote controls for both, and they definitely threw out a lot of heat. Obviously, no idea how much they cost to run. We had both on for a couple of hours and they definitely warmed a large area which had two doors going directly outside.