I am in the process of installing a system on my 2004 Beneteau 331. I am putting in a Flagship Marine 12,000 BTU unit. I am about 75% done and about to start working on it again. If installed by a dealer they would use a 12,000 BTU Cruiseair unit. I tried to purchase one but could not get a dealer to sell me one. There are a few brands available in this size but unit size is the main consideration. The Cruiseair and Flagship units were the only two that fit in the cabinet.