For a very long time I chose a fan in the bath and I was not mistaken with the choice. I have a odnushka and when I open a window, the fan immediately starts spinning quickly, which indicates a good hood and good bearings in the fan. When it works from the network, the noise is exactly what is needed, so that it is audible but does not bother at all. I advise
My review now features some photos to help you make a more informed decision.