The fan is very good quality and the performance is better than expected. I have set it at the lowest speed and can still hear the flow of air through the extract grill. The fan itself is in the loft and cannot be heard. The sound level is not obtrusive and lower than a standard axial extract fan, but it was my goal to have the fan run as quietly as possible. I am still looking into ways of reducing the level of sound. The fan is probably over specified for the small size of the shower room and I suggest carefully assessing the required performance for the size of room.