Gave this fan three stars only it does a great job in the bathroom yay no more steam. However the back draft vents are rubbish and will fail they are made of cheap plastic and the spring to close them is weak. Also the backdraft blades extend into the ducting and if the ducting is not perfectly straight the blades will jam, I removed my as I have a back draft installed further down the line, Other problem is the five year warranty which is only valid if you get a licensed Electrician to fit it. They advertise the fact this has a cord and standard three pin plug that plugs in a power point and that home handymen can do this. As it was my existing fan was wired to a power point and it was a straight swap for the VMFIL150. But to get an warranty I would a sparky to do the work