When I first started using it, it gave off a squeaking noise. It was not too loud so it was tolerable. It would increase and decrease at certain times but still worked. Eventually it got extremely loud and stopped working completely. There is some sort of wire shortage. It will work if I hit the motor housing but only for a few seconds.
If you touch the protective cover of the fan, the fam hits the little bars. I am hoping that can be adjusted somehow but to stop any interference we just did not touch it unless it was off. It looks unique but I am not sure the smaller blades makes a huge difference.