Rocket stoves burn very hot, are energy efficient using little biomass and are almost smokeless – significant advantages for conserving wood, cooking efficiently and preventing respiratory diseases, a major problem in the two thirds world. Dr. Larry Winiarski shows you makes a clean burning rocket stove using just 16 adobe  bricks. Adobe bricks are lighter as they contain organic matter (chopped straw, rice hulls) and provide  much better insulation than regular bricks. With better insulation  you’ll get a hotter chamber, a cleaner burn and less (or no) smoke. You can make your own or alternatively use conventional fired bricks and coat them in a clay  plaster for even more insulation*. You can build this outdoor cooking stove totally for free.

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Source:permaculture.co.uk