Remote Living > Heating
This is what we use to heat our house with.
Frank S:
I thought that I had posted this but like so many things in life thoughts are just that they are never actions
After getting this house many things have required an upgrade. Much of which has been due to the house being left vacant for a number of years.
It came with an Earth Stone wood stove made in the early 90s. First off the chimney pipe was rusted and burned out beyond belief from the transition box through the roof and out was 8" triple pipe making it 12" od ,
But it did not extend above the peak of the roof like it should. It was so rusted out that the center pipe was non existent. What was supposed to be a transition box ws nothing more than a 4" deep 16" diameter metal can also rusted out. Rain had run down the pipe for many years leaving a thick layer of rust on the top of the stove.
SO I removed everything in 2016 we relied on the heat pump for heat the first winter.
I refurbished the stove and painted it with KBS Heat resistant paint.
My wife moving the 300 lb stove on my 2 wheeler
the new transition box 16" x16" x 16" tall hangs down 4 inches under the ceiling and is wrapped with 2 layers of concrete backer board.
If your are thinking that the transition box extends almost to the roof decking you would be correct.
new SS 8" triple pipe installed and bagged
Frank S:
The heat barrier walls behind the stove have a 1" dead air space and 2 layers of 1/4" thick concrete backer board then covered with 3/8" thick ceramic brick tiles
On top of the stove is 200 lbs of ceramic tiles to act as a heat storage mass.
this is a shot of my thermometer mounted in the kitchen 30 feet away from the stove
SparWeb:
You'll have to explain why you bagged the chimney to me... ???
It sure looks cozy now.
Those are ceramic tiles also stacked on top of the stove, too, for extra thermal mass?
Frank S:
I bag the chimney in the late spring and leave it bagged until fall. to prevent the undesirables from building nest in there Not talking about birds either.
Yes the ceramic tiles are there for thermal mass. and have added at least a 40% thermal transfer of heat in the house that otherwise quickly radiated off.
The inside of the stove is lined with fire brick up about 2/3's of the sides these assist greatly in holding in heat for combustion allowing for building much smaller slow burning fires.
I had built a heat recovery exchanger for the flue pipe which did a good job of reclaiming a lot of the heat that normally went straight up the chimney but I was too efficient and pulled too much heat out of the exhaust which allowed buildup in the chimney. This required cleaning after every 5 to 10 fires or it would quit drawing well. It did produce a lot of quick heat but again the fire had to be kept going extremely hot and fast burning leaving the damper open to achieve as full combustion as possible. THe house would become unbearably hot and drop the humidity to near zero the water in the coffee pot on top of the stove would boil away in minutes.
This is why the ceramic tiles are in place and the recovery unit is in the pile of reclaimables
joestue:
--- Quote from: Frank S on November 24, 2018, 10:33:12 PM ---I had built a heat recovery exchanger for the flue pipe which did a good job of reclaiming a lot of the heat that normally went straight up the chimney but I was too efficient and pulled too much heat out of the exhaust which allowed buildup in the chimney. This required cleaning after every 5 to 10 fires or it would quit drawing well. It did produce a lot of quick heat but again the fire had to be kept going extremely hot and fast burning leaving the damper open to achieve as full combustion as possible. THe house would become unbearably hot and drop the humidity to near zero the water in the coffee pot on top of the stove would boil away in minutes.
--- End quote ---
what i did with my folks wood stove (fisher papa bear) was to build a heat exchanger inside the stove. in the upper section there is nearly 20 feet of 1" sch 40 pipe that runs horizontally in 5 loops. it pulls just about the right amount of heat out of the fire. i'm of the opinion that the creosote buildup on the pipes is just about right, once it gets thick enough the heat transfer drops, and the creosote flakes off like scales. my brother is of the opinion that we should burn it off every week.. so we burn it off about every 2 weeks, light a fire getting the pipes red hot.
we have a thermal switch in the chinmney (tungsten Tig rod, stainless steel pipe, lever and microswitch) that turns the pump on and off automatically. 70AH of 12v battery (pump draws about .9 amps) for back up. a 10$ "solar" pump from ebay lasts about a year.
the pipes are like this with about 3/4" between them and 1" between the pipes and the side of the stove.
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for that particular wood stove i would recommend another set of pipes. so it would look like this:
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and i would have them arranged in two parallel streams so you can drain one and burn it out while still collecting the heat from the other coils.
i've been thinking there may be a creative way to build a heat exchanger with vertical plates like this: ||||| but only one third full of water. so to burn the creosote off, you just pull it out and flip it over.
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