My 3200SCR has never had an AC/Heat Pump in it though Maxum provided a hint as to where their customers thought it belonged - in the stairwell which is why they ran flex tubing from there to the underside of the middle upper galley cabinet. Okey dokey - this is where I would like it to live too. I have searched various forums online respecting how to size an AC properly and decided to use cu. ft. for my calculations. As painstaking as it was
, I measured every space in the cabin (LxWxH) in the bow's berth, from bow berth (galley) to aft cabin opening, the stairwell space, the head and aft cabin and came up with a total of 800 cu. ft. which includes an additional 10% for error I know is present. According to my number, (800 x 14 BTU per cu. ft.), I arrived at 11,200 BTUs and added 1,000 BTU to account for 4 portholes, 3 bomar hatches (exposed to sun), the aft cabin (and the window there) plus the black plexiglass cabin entry door. So, in my view, an AC/Heat pump of 12,000 BTUs would have been what Maxum designed for give or take a few hundred BTUs. I was surprised to find that when I requested quotes, the first one I received included a 16,000 BTU unit. Okay so now what? Before I reach back to the installer about their choice, a few questions I have for other owners who have an AC on their boat is: 1) can you share what size unit is installed 2) how you or another other person measured to decide on the sizing 3) what manufacturer you went with and 4) in terms of functionality, does the size unit you have meet your expectations in terms of climate control (would you have chosen differently) and finally, how do you find the switching on and off of your current unit? About right, not enough, too frequently? I'm thinking that a happy medium might be a 14,000 BTU but as you know this is not a common size. So I am hoping to make the best decision for my 3200SCR with input from others. Thanks in advance for any insights you can offer.