I Finished my A/C install.
I purchased a 16000BTU unit form Flagship marine.
http://www.flagshipmarine.com/
The main reason I picked flagship is for the electric heat option. I like to boat in the late fall and had experience of reverse cycle quitting when the water temp falls below 50F. The controls are HVAC industry standard. You can go to wall-mart and get a thermostat; it is also built in the USA.
The small 2" duct goes to the head.
RiverRatt attached the following image(s):
"The is no dumb-ass vaccine" - Jimmy Buffet