Steve, I’ve been reading your great site and wanted to ask a few questions/make a few comments. With ventilation systems (including conditioned air)? You don’t seem to use ducted systems, is there any reason for this? In my experience (non-marine), dual 6-inch (15cm) ducts would be adequate for the living area sizes you have. I’m not thinking of round ducts, but more a box section mounted in the ‘eaves’ area. Your thoughts? – Craig