"I bought the Vent-Axia Centra-T Fan to install in the new bathroom and my main requirement was that it must be quiet enough while not compromising on the extraction rate.
I am very happy with the choice and this was very easy and straight forward to install. The fan has settings to select different speeds and also the times can be adjusted between 1 minute to 30 minutes for the boost.
Accompanying instructions are simple and easy to implement. It can be installed as a stand alone unit or combined with bathroom lights so the boost kicks in as soon as you switch on the lights and keeps going after the lights are switched off for the selected timer setting."