T&T: "the best" AC system?

[Pascal Gademer]

Chilled water systems are usually for larger boats, 80 and up. teh 
compressors are in the ER and send chilled water to air handlers thruout the 
boat.

an alternative is to use remote split systems where you have the compressors 
in the ER and send the freon to air handlers in the living quarters.  It 
cost a little more than compact units but the loudest components 
(compressors) are in the ER, not under your bed.... :-)  Running the two 
copper lines to the air handlers is no worst than running the water line and 
it keeps all the water lines inside the ER where it belongs. no pumps, sea 
cocks, strainer, discharges outside the ER.

as to capacity, i doubt you will get away with just one 18k BTU on a 42 
footer. teh saloon in my 53 isn't that big (narrowish beam and wide side 
decks) and it takes 2x16k units to cool it in summer.

pascal
miami,fl
70 hatteras 53MY
live helmcam @ www.sandbarhopper.com