AC location
My Mermaid 12CH is mounted under the aft seat of the settee on the starboard side. The through hulls are located there as well. The previous owner had that done by the yard. The only problem I have is that I have only one vent blowing aft, which makes the aft berth cool, but the v-berth never cools down enough. Otherwise, the thermostatic control keeps the cabin cool and dry. I have found that if I try to keep the cabin below about 76 degrees, it runs until it freezes, so be aware of trying to keep it too cool. In the heat/humidity of summer, I can run it during the day at a higher temperature, which keeps it comfortably dry.