Read Saving 50% Cooking Energy with a Metal Improved Cooking Stove (ICS)
by Sjoerd Nienhuys.
In this Technical Working Papger, he generously shares his experience improving specific technical problems with stoves in Tajikistan, Pakistan and Afghanistan. In this report, he presents and improved pot skirt, stove, and chimney design for street vendors and restaurants. And he considers the multiple challenges faced by poor people in the Himalayas, where it is very cold, and there is very little wood available. This paper includes plans for a modified bread oven that can be used as a space heater in the winter time, as well as carefully considering the many factors that go into building and using the new design.
In addition to the attached paper, Sjoerd has drawings and other information on his web site: http://www.nienhuys.info