[/quote] In my boat the noise of the air conditioning units was more intrusive than the sound of the generator. That will usually be the case as generators are normally in sound-deadening enclosures whereas the ac units are inside the boat with no sound deadening. [/quote]

Hum, the only boat we had with a genset was an older Hunter and I can't remember if it was in an enclosure or not. If it was there is a good chance the cover wasn't put back on right or some of the seals/insulation weren't in good shape. I don't recall the blowers being that noisy but I can see how they could be. Next boat is probably going to be a cat with A/C so I'll pay attention.