CapShroud I am also looking for the next unit to replace my failed MarineAir. Installed by the previous owner on a Hunter 35.5 I was waiting for the 12K btu unit to fail as it was undersized and I did not like the installation so I get to start from scratch, the challenge I am facing is where to install given the limited spacing and where I want to give up valuable storage. In my 5 months of searching I have found that Flagship was made by Ocean Breeze up until about 2 years ago. I do not know who is building the Flagship units today however if you compare both manufactures you will see they are identical. It was told to me that Flagship was a small office reselling the units where Ocean Breeze (Quorum Manufacturing) does their own manufacturing in a 60K SF factory they invited me to come down and tour.
Marine Air today is not the same company that made the the 10-15 year old units that a lot of people here have including the 12K btu that I had. Dometic purchased Marine Air and went on a buying spree purchasing *several* of the more successful brands essentially capturing the customer base. However the Marine Air units today are some of the best on the market with their non corrode poly drain pans. King Air has been around for a while and many happy customers, also Arctic Marine Air which looks to be virtually identical to the King Air. There was a post on the Cruiser's forum a boater with a King Air unit replaced it with an Arctic Marine air unit and could not tell the units apart except for the color, King Air is a bit pricey over many of the others. I looked at Mermaid and liked their warranty, after speaking with the sales rep at the factory their units like Marine Air there units are what you see is what you get with no customization. There are a few on the Hunter Owners forum with 35.5's that have gone to Arctic Marine Air and had custom work done for the unit to fit where they wanted it. There are essentially 2 dominant compressor manufactures these AC manufactures are using today, Panasonic (Matsushita) or Tecumseh. Panasonic being a Japanese company I had the Mermaid factory look at their compressor to see where it was made, to his astonishment it was made in Malaysia. Someone told me the Tecumseh compressor they had was made in Brazil, granted these are made to the manufactures specs you can flip a coin and pick your quality the Japanese standards are probably higher. There is also Webasto, a colleague has one of these he is disappointed with plus some nuisances I have found looking at his unit thus they are off my short list.
Most of the manufactures use many of the same components, my choice comes down to the dimensions I need the unit to fit (will one of the out of the box units work for my application), Do I like the design, does the position of the air discharge work for my application (this is a biggie), flexibility of the company to work with me, current demand starting and operating, noise level, is the fan speed variable, does the fan run continuously as long as power is applied or does it shut off when the compressor cycles off (this is the problem with the Webasto my colleague has) and the customer service others have had. For my application I have narrowed my shortlist down to Ocean Breeze 18K Low Profile, 18.5K or their 20K or Arctic Marine Air 19K leaning towards Ocean Breeze. A colleague with a 16K Flagship on a 35' boat wishes he would have gone a little higher on the btu's so I am aiming a little higher, Ocean Breeze will also make a reverse cycle unit if you want which gets you away from the heat strip. The colleague with the Flagship 16K feels the heat strips just knock the edge off when it is cold, he wishes they would output more heat, the heat strips will also mean higher current demand (may require larger breaker) than heating with a reverse cycle system, the flip side of that coin is heat strips do not have a reversing valve to fail. Many considerations, not a one size fits all answer for which unit is best, rather which unit/manufacture is best for your application.