The two-barrel stove is sometimes called an Alaska heater. Stotz sold a kit for making them.
The Russian masonry stove was one of the first things thtat one was supposed to be licenced to build properly. You didn't want to have one fail mid-winter! It was based on having brief, hot fires heating the thermal mass, which would provide constant heat without the creosote buildup and waste smoke of an airtight stove.
I'd like to build a wood stove using a car turbocharger to pressurize the firebox. In effect, you'd have a gas turbine with solid fuel. At high pressures, you could get some power out, but even a few PSI to keep the fans turning would let you condense the steam from the smoke for a big efficiency gain, and install a cheap vent instead of a chimney.
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