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This is awesome! Too bad I can't vote more than once!
From the author, my answer is, it it depends this design burns with almost no smoke. However, this could still produce carbon monoxide. So you probably shouldn't burn this in a totally enclosed area, however, you maybe could in a tent with the windows open. Ventilation is the key. Another thing is that, once this gets going, which only takes from 30 seconds to a minute, it burns with no smoke, but when you first put wood on, or if you put tons of wood on it, it may start smoking, and it will do so quite rapidly, until the smoke ignites, which can take up to 45 seconds, enough time to smoke out your house, and fill it with carbon monoxide. So basically, the answer is no, not in the house. Maybe in a tent.
Side Burner Can Stove
However, wood gas is also made by heating wood in an enclosed container, causing the wood to char (carbonize) and release wood gas.
Also, if you make this, you will notice that the large flame this produces is very even, and it looks like a burner. This is the smoke burning.
You can lookup a diagram, but I will try to explain. The fire in the small can super heats the air between the two cans causing it to rise. The superheated air is then forced through the alternating holes in the small cans, which then ignites the smoke, or, wood gas. That is why this design burns with so little smoke. Wood gasifier stoves burn 10 times more efficiently than an open fire.
DIY Wood Gasifier Camp StoveView Instructable »