I have spent over £2,000 at B&Q refurbishing my bathroom and the 'pièce de résistance' should have been the Manrose QF100T extractor fan. However, after l had installed the extractor fan and set the overun timer for 30 minutes, my wife had a shower and subsequently myself, in order test the new extractor fan. Having said this, the bathroom was full of steam and condensation running down the freshly painted upper part of the walls onto the newly tiled portion below. Even after 30 minutes, my bathroom was still full of dripping confederation running down the walls. I had to open the bathroom window to vent the steam out. This product is totally a waste of money and not fit for purpose. I have uninstalled it and shall be taking it back to B&Q for a refund.