Thanks both. I had a look on the suggested site. Lectrician - would this one be suitable?
http://www.allaboutelectrics.co.uk/doc/12/vid/1754/VENT_AXIA_4INCH_INLINE_TIMER_FAN.html
Thanks again :D
I’m looking to get a fan for our bathroom at home. There is no window in the room and I’m worried about the quality of the air…I have no idea where to start looking for a fan or what kind of fan I need…any advice would be appreciated!!