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Vortex fire box masonry shell heater build in large barn  RSS feed

 
Alan Mikoleit
Posts: 106
Location: Sandpoint, Idaho
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I am well along in building the first of 2 vortex fire box masonry shell heaters in a large barn. There will be a large cook lop over the fire box. The 49 inch high riser is inside a 24" x 29" x 7 feet high shell. The fire channel is in the back left rear comer and makes a 90 degree turn to keep the foot print small 3 feet x 5 feet. There are 2 fire channels going into the riser. The upper smaller one is to keep smoke from building up under the arch top and coming out when the door is opened. I implemented this change on my current heater and performs as designed to. The burn box is quite large and has preheated air coming in through pipes at the 2 top rear corners. I am well along on the outside paver brick facing and bell. In follow up on another post of mine for this build there was no need for insurance or inspections. I just have pictures of the unfinished fire brick lay up. More in about 2 days.
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Alan Mikoleit
Posts: 106
Location: Sandpoint, Idaho
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The concept for my arch top vortex fire box came from watching these videos of conventional wood stoves injecting massive amounts of preheated air.
1.https://www.youtube.com/watch?v=701ydLxZuMQ
2.https://www.youtube.com/watch?v=X0UsdWUzYEU
3.https://www.youtube.com/watch?v=qzSiQ3dkgiw
4.https://www.youtube.com/watch?v=3YxrP_YHwJk
5. https://www.youtube.com/watch?v=U0w2ZmyrrqY

On my first heater there are air inlets at both rear bottom corners. They can get blocked by ash so on my second heater they were moved to the top rear corners. One of them goes directly into the fire channel. On my 3rd and all following heaters the air will come in through 8 holes equally spaced on each side at the bottom edges of the arch top. Like the above stoves I want as much combustion as possible to take place in the fire box. I have included a picture of how a large vortex forms in my arch top fire boxes. The fire goes up one wall over the arch and down the other wall. I will get a better picture of this huge vortex soon. I am also showing a picture of the double vortex in the bottom of the riser. That same picture shows the riser to be perfectly smoke free. To my complete surprise another builder just said my fire boxes were too big, it's impossible for me to have a double vortex, the preheated air was coming in at the wrong places, the riser is too short, smoke would come out of the riser and go back into the fire box, the masonry shell is too small, its impossible to be burning clean or efficient, and I have never seen a RMH performing correctly!

On Tuesday I will post pictures of the finished second heater. We are going to wait 28 days for the masonry shell mortar to cure before testing.
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vortex in fire box
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double vortex in riser and smoke free
 
thomas rubino
Posts: 828
Location: latitude 47 N.W. montana zone 6A
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Nice build allen; Looking forward to more pictures and maybe a diagram of what you have designed.
 
Alan Mikoleit
Posts: 106
Location: Sandpoint, Idaho
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Thomas I will give out exact brick layup build details soon. Pictures of the finished heater will be up tomorrow. The lower end is the fire box, The cook top is not shown, The second opening is for an oven. This is the larger of the 2 heaters.
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Alan Mikoleit
Posts: 106
Location: Sandpoint, Idaho
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This is the finished smaller of 2 heaters in a large barn. This one does not have an oven. The bricks have a white pattern on them and is not mortar. The stove top will be where the tools are sitting. Next I will give out the exact fire brick layup so any one can copy this if they choose to.
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Alan Mikoleit
Posts: 106
Location: Sandpoint, Idaho
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I just did this test on my first heater at my place .I t held a paper towel right above the chimney on the roof . My hands did not even get warm, paper did not burn or discolour.. Just like the tests you see of people holding white cloths up to their tail pipe when running on HHO.
 
Alan Mikoleit
Posts: 106
Location: Sandpoint, Idaho
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This is the fire brick lay up. The arch top sits on level 5. The vortex fire box is 12.5 x 17.5 x 22 deep. In one picture 2 bricks are removed to see the fire channel underneath.
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Alan Mikoleit
Posts: 106
Location: Sandpoint, Idaho
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3 more pictures This arch top form is not here or I would have shown it. Make the arch top like a pizza oven. Don’t cut the bricks. Fill in the tapered gaps between them with cast-able refractory cement
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