Thom,
I'm using a basic window air conditioning unit, freon-22, capillary tube
instead of expansion valve.
The conversion to water cooled allowed me to use a cheap window unit without
hacking a hole in my cabin. I got the idea after getting a good look at
ground source heat pumps, which essentially get heat in the winter and dump
heat in the summer to ground water. I thought, I got plenty of water to do
that, and I don't even have to drill a well! If I get ambitious, I might
even add a reversing valve and extract heat from the bay to heat my cabin in
the Fall. But that's for another day.
Scout

"Thomas Stewart" wrote
The mist is slowly rising, maybe? Are you still using the Freon system
with the Evap. and expansion valve? If so, Why the conversion?
A Confused,
Ole Thom