Interesting book on heating

I just came by this free download and wanted to share it. It gives some nice instructions in solar cooker and other interesting designs for cooking on wood.

Contrary to my  former understanding and to my surprise many villagers here in Azerbaijan still cook on fire, even if gas or electric is available. It is to expensive for the villagers ,that they rather gather some wood for their cooking needs and spend their precious manats for something more important. These simple designs can make cooking much more simple and efficient. Reducing fuel consumption with more than 50%. And mane even more important, reduce smoke and by that inhalation of poisonous gases.

Or check out www.rocketstoves.org yourself !