Right, Franco, I follow that....and there are a gazillion more ways to achieve that end then to harness a little chip and fan, and to bigger effect. I'm on the board of an Ethiopian mission that drills clean water wells and provides biogas tech to people who normally burn cow poop for fuel and drink from chocolate milk colored water sources...their whole lives. We teach people how to make clean gas...cleaner than wood or manure....fires for cooking and heating, from waste.
I once watched a kid weld a pipe using a wood fire boosted with the air from a car tire innertube. They know about forges. They don't know about the convenience of turning a knob and getting fire and heat.