From YouTube:
A way cool Top Lit Updraft Gasifier (TLUD) that requires no power. It is a lightweight, portable natural draft chimney stove designed for both indoor & outdoor use! The ability to cook indoors under shelter is a key advantage over stoves without chimneys.
Envi blocks found at http://bio-div.com/our-products/wood-…
or
http://www.mountainvapure.com/Product…
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