This fan was selected and installed by my contractor. Besides being loud and not really that powerful, it is extremely inconvenient to remove 4 screws in order to take the filter and cover down for cleaning. The worst part is trying to put the darn thing back up which would be difficult with an agile, flexible body. Why not use a fastener that doesn't require a screwdriver/drill or gymnastic-level flexibility?   I have lost two screws in the process of trying to reinstall the cover and I don't see any way to obtain replacements.