About 3 years ago I installed two A/C units on my 42' sloop
. After much research
, I settled on the same units the USCG and Canadian CG use. These are from Flagship Marine
: Marine Air Conditioning Systems - water, air and keel cooled.
I installed a 16,500 BTU unit under the berth in the aft cabin, which cools the aft cabin, the head/shower, and the main cabin. A 12,000 BTU unit was installed under the V-berth forward which cools the forward cabin and the main cabin.
Most moderately hot days, the smaller unit is effective in cooling
the whole boat. The larger unit, by itself, will cool the whole boat on pretty hot days. It's very, very rare that both units are needed; haven't really seen one yet, even the 100 degree dog days.
These units have been flawless. They make a low profile model which might be of interest to you.
One of the principal reasons I went with these units was because I wanted some heating
capability, too, and DID NOT want to do it via the usual reverse-cycle route
(a la CruisAire), with pumps which run all the time and which are inefficient when the water
temp goes toward freezing. The Flagship units have an inexpensive heating
option consisting of a large diameter heating element. This draws about 2,000 watts. Just one of these -- either unit -- keeps my boat warm on all but the very coldest days of winter. For those, or while cruising in cold weather
, I have an Espar D-5L diesel
So....a strong vote for Flagship Marine
S/V Born Free