We have PSC 31 #26 in Daytona Beach, recently moved from Texas. Our A/c system compressor is installed on starboard side of the aft lazarette. The air handler is in the locker next to the chart table. One vent in main salon and one in head. No problem keeping cool in summer and warm in winter.
There isa separate thru hull with strainer in area near raw water intake. The exit is on starboard side well above waterline near the compressor.
Our boat " Patty Ann" is not far from yours in S/A. Let me know if you want any further info since we are nearly neighbors.