Join Date: Jun 2005
Location: Barnegat Bay, NJ
Thanked 70 Times in 65 Posts
Rep Power: 12
For a 30 footer, 12k BTU is more than enough.
Chuck, I've seen a number of theories on sizing AC units for sailboats. When I talked to the Webasto guy at Annapolis last year he thought the 9K might be a little undersized on really hot days and recommended the 12K.
A unique thing on our boat is I have a set of removable companionway doors. That adds a lot of additional glass area compared to hatch boards.
95 Catalina 30 Island Time
“The sail, the play of its pulse so like our own lives: so thin and yet so full of life, so noiseless when it labors hardest, so noisy and impatient when least effective." - Henry David Thoreau