Thread maintenance & musings:
Greetings from Japan!
With lots of spare moments here (training that elsewhere takes about 2 months will take 6 months here) I finally found the time to transfer all the photos from the entire thread from photobucket to imgur. Strangely, PB ruined millions of forum threads around the interwebs but mine were still working. Not taking the chance though, so goodbye PB! If by chance anybody finds a bad pic or link let me know and I'll fix it. While changing all the photos I had a chance to revisit the project - I gotta say, I had forgotten just how much work it has been! Still worth it though - lots of fun too.
With some spare time on my hands I have been planning and brainstorming all the work to come. One system that has plagued me (along with most of the boating community) is air conditioning. My old unit was a (pretty good) Flagship Marine 18,500 BTU unit. No reverse cycle but it had an electric heating element. Worked good and was still going strong until the hurricane. If I was just replacing a worn out unit, going back with the same one would be a no-brainer. No need to change any plumbing, ducting or wiring. But . . . . .
Now I have the chance to build a system from the ground up, planned and properly built-in with no compromises to existing structures and such. So here's an outline of the pros and cons of the old a/c:
Plenty powerful, moved lots of air without needing to resort to extra fans in the vee-berth and main salon. However, on hotter days I couldn't move enough air through the aft cabin without setting up a portable fan to help it along. Similarly, the heater worked fine until the temps got below freezing outside, then aux heat was necessary. The a/c was a little noisy but not too bad, maybe a little noisier than some of the newer ones on the market. Plumbing was not intrusive but the ducting took up a lot of space! I ran three 4" ducts along the starboard side (behind all manner of cabinetry) with one reduced to 2 1/2" going forward for the forward head and vee-berth. One 4" duct routed aft for the aft cabin, splitting into two 2 1/2" ducts/vents. Air, taking the path of least resistance, mostly cooled/heated the main cabin. Fair enough, it's the biggest area. And it had to have it's own dedicated 30 amp line.
I had thought over the years of adding a second smaller a/c unit for the aft cabin but space was always an issue there. Now, maybe I can build one in. So now the question is: one big (maybe bigger - 20,000 BTU-ish) unit located in my original location, under the galley, with ductwork snaking to all the cabins,
or:
two units, a 16,000 BTU covering the main cabin and vee-berth, and an additional 6,000 BTU unit for the aft cabin and head,
or (now this is where it gets a little crazy):
A couple of these:
http://www.noriahome.com/
I've been following the development of this a/c unit for about 2 years and they are almost ready to get it on the market. It will be 5,000 BTU, and importantly for us boaters, significantly smaller and lightweight (comparatively). They can be removed and stowed when not in use, and draw a lot less power than existing a/c units. The only info so far states it draws 480 watts (115VAC). I have queries to the manufacturer for exact dimensions, weights and power requirements.
My thought, based on the vague dimensions on their website, is that it
might just slide into the larger portlight openings in the deck (the ones I converted to fixed ports). Maybe I could fab up a way to slide these a/c units into the openings and seal them, then remove them when the boat is underway. I'd probably need three total - two for the main cabin and one aft. The nice thing is one could be used away from the dock based on the stated power draw without a massive generator, inverter, or killing the batteries. A good solar array (planned) could keep the draw under control. Not talking about continuous a/c underway but sometimes it's nice to knock the heat down before bedtime!
I've always got my eye on the ultimate goal, long-term cruising the Pacific, and that big power-hungry a/c unit under the galley becomes a useless appliance without a big generator. Which I don't plan on having. I still want a usable live-aboard boat though, prior to achieving
Escape Velocity.
I'm still looking, or trying to see, all the angles here, but being halfway around the world, all I can do is scheme & dream!
Thoughts? Ideas?
Cheers,
Mark-san