We have five AC units on our Bahia 46 (used
charter version, 4 cabins & 4 heads).
There is a 16000 BTU compressor in the salon, behind the back rest and under the window/hatch. The intake is just in front of it at the foot of the salon seating. The cooling vent sits at an angle on the counter
storage space between backrest and window. The control panel is mounted just below the metal countertop (behind galley sinks) at the end of the salon seating.
Each cabin has a 5000 BTU compressor under the bunk. Each bunk has basically two
storage spaces with a wall separating them. The compressor sits in the smaller storage space, furthest away from where you stand in the cabins. The intake and cool air outflow vent are mounted one on each side of the storage access door at the 'foot' of the beds. This means there is a vent running along each side of the larger storage space but it is not too limiting. The control panel is mounted just above the light switch on the closet wall.
Hope this helps!