I meant the usage of chimneys, but yes, I could imagine how these claims can be extended to that too. Now * How do you expect a group of people unable to affor

I meant the usage of chimneys, but yes, I could imagine how these claims can be extended to that too. Now * How do you expect a group of people unable to afford a stove to afford retrofitting their home with a chimney? * I am from nation with very poor and repressed background, but we managed to do that. For building a functioning oven with a chimney you do not need a lot of fancy material - just bricks, mortar (or can be even made from clay rich earth) and a iron plate. Of course these gadgets are expensive and stupid and this was my original criticism. * Your chimney solution solves none of these problems. * We do not know that as it was not even considered as it seems to me from the article. Instead they tried to sell complicated industrial products.