I'm not sure what you are getting at. Your rebuttal has nothing to do with what I said. I know how it works. There is nothing to open my mind about. It's not a "reactive furnace." It's an impractically designed wood stove. >Since the fire comes out the top it draws in air from the bottom, the hotter it gets the more it pushes air out, and in turn pulls more air in. It's a crude venturi effect. Wow... You mean a wood stove? Who would have ever thought. Thanks for the mind blower.