well I have spent the night calculating wood btu etc. right now I burn 12 pcs of dry fir/hemlock mix, 4 lbs per pcs. is about 250,000 btu input in about 12-14 hours. my stove is rated at 75% so give it 40%, Im getting 100,000 btu into the boat. none at night as I don't wake up enough to feed it. A 250 gallon 1/8" water tank will absorb 250,000 btu going from 50f to 150f. thats 10 pcs of wood. that same tank will radiate app 18,000 btu/h (if painted black) so in 6 hours 108,000 btu, the water would drop to 110f or so. This would give me the night heat I so desire, this would require 5 pcs of wood to replace so about 2 hours and the rest of the days burn 2 hours?? goes into the ship. Consistent heat is better for everything. My humidity downstairs is 54-64% while some heat is on. gets to 76% when cold for a few days. Read somewhere that Ernie and Erica burn 35-40 lbs a day in a 4 burn during the winter, I may yet have even heat and save some wood.
I have tried making a drawing of the build area using google draw, its crude but may explain my plan. It will include all the proper finishing and details not mentioned.
I have been advised by someone who knows (Ernie) that I should not consider the batch unit for this application and best to go with the J unit, that's good enough for me
The heat produced downstairs is transferred up by:
1: the chimney is single wall up to the ceiling, then super pipe,
2: a 12" dia. pcs of pipe inserted in the deck allowing heat to flow upstairs,
3: the stairwell.
The basement and living room insulation is r12 on the walls r20 under the basement floor and in the living room ceiling. The steel deck between the living room and shop can transmit heat to the jointly connected steel hull which sits in 42f water most of the year.
The upper house has 3-3x6 windows, 2-4x6 windows, 1-5x5, 1-5 foot slider, 1-3x4 xo galley window, and 2-1.5x5 panes in the two exterior doors. Like I said a wall of glass, but when you live in this beauty you have to see it!