Q: Putting fans above beds ok? Reply: 1. From Feng Shui point of view no. So long as the centre mass is not above the chest. 1.1 The rest have more to do with unfounded concerns like the fan will drop down .. etc..etc.. 2.1 Reference resources:
https://www.geomancy.net/forums/topic/14604-any-problem-if-ceilings-fans-are-installed-all-rms/?tab=comments#comment-30493 2.2 Reference:
https://www.geomancy.net/forums/topic/15595-is-ceiling-fan-in-the-bedrooms-ok/?tab=comments#comment-33197 3. A ceiling fan is in theory practically fine as most landed properties have them. But in all bedrooms; try to avoid a ceiling fan each that has drop down e.g. 3 or 5 lights. For all bedrooms, if there is a light below the fan, it has to be circular. 
3.1. If possible, the bulb or the centre weight of the fan, ideally should not be directly above one's stomach when lying on the bed. 
3.2. Do take a pinch of salt if you have visitors in your home and some comment that a fan can drop down and hurt the person or that of Para 3.1. Sometimes all these negative comments may make the meek or one highly worried.  If one can be affected by such comments, then frankly, please don't install the fans.