you did say this was a 17 watt 230V desk fan, right? In other words, UK single phase? At a guess, a 6-7 " dia fan?lol some of the answers are a bit on the paranoid side of the house, almost as if they didn't read the question or aren't sure what Watt means. This desk fan is little more than an AC version of a computer fan, and can be run from 0 to full speed with little or no concern. IMPE, the scr and pot were left out so it cost less.