Crazy as it may sound 99, I’ve just got this thing about vibration noise. The noise from the fan itself won’t bother me that much, but laying in bed 2 floors above and hearing a vibration coming through the house will drive me bonkers. Putting the fan inside an enclosure of some sort is probably the most effective for dealing with fan noise and I may end up doing so one day.
For now, a quick n’ dirty solution that gets the fan as close to the ceiling as possible without concern of it coming down on something (or me) will have to suffice.