For me, the most efficient place for an AC blower is the highest arms length level of the shortest user from the controls and air flow directed to the users' bed. This way, similar to car ACs, the users get direct cool air immediately, bringing down the body temp faster leaving the rest of the hotspots of the room to cool down on their own time.

Quote Originally Posted by Archerfish View Post
The only reason I know why they put those air conditioning units near the ceiling is to maximize the cooling effect. Hot air has always the tendency to go up while cold air settles down.

But then again, some would say it is better to place it through the windows. Should you require to pull it out, it should be easy.