Dear Dean >I think it's really neat that a stove can either make bio-char or not by controlling the bottom air so consumers can pick what they want the stove to do.
I second your call for the stoves to be fitted to be able to do either. I have noticed that it is easier to control the power the whole time if at first a stove can make charcoal (which reduces and controls the power) then burns the charcoal (or ½ charcoal) towards the end, again giving a controlled power. This means the fuel can be loaded and not fiddled with for a long time. Several experiments show that such a stove can be refuelled say, when the charcoal is ½ gone, with wood, then put back into char-making mode again. The only trick left is to get a clean burn from all stages/forms of the burn. That is just air control, basically. Regards Crispin
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