Cabin Cooling Radiators
I don''t know how well they work. Certainly the boat would need to be insulated and these units probably wouldn''t work as well an any A/C unit. But, since I don''t plan on using marinas and shore power, the whole advantage to me is its low energy draw.
You''re right, Noreaster. I know from snokeling that tropical waters can be quite cool as close as 5''-6'' from the surface. A long intake hose wouldn''t have to go down much further than the keel to bring up the cool water but might require a slightly more powerful pump to suck water through the hose''s length.