I still can't figure exactly how the thing works, but man that does look awesome. Pellet fuel is pretty economical depending where you live, too
It is just a rocket stove (pic8.co) that uses pellets as a burn medium v.s. wood. The feed is just a gravity system with steep walls in the hopper. It has three trays, the first catches the whole pellets and as they heat they shrink then fall into the next that is a 1/2 burn tray they smolder a little and then fall into the burn tray that lets the ash fall through to the bottom. Really amazing engineering going on in this thing. The only thing I would add would be some kind of steel heat sinks to the outside of the burn tunnel to help disperse the heat outwards. Like a passive stove pipe heat exchanger. (thedoityourselfworld.com) You can always just throw a fan at it as well I suppose.
How much fuel does the hopper hold? Approx burn time I mean
60 pounds, a bag of pellets is 40. On the lowest setting it will run for 36 hours and on the highest for about 12. A bag of pellets is 4-6 dollars.
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