Does anyone know anything about the claims about rocket mass heaters? (See this online tutorial here or the wiki page here.)
I would like to fit one of these into an Arctic cabin to replace a shitty pot bellied stove.
I am particularly interested in the claimed efficiency of these rocket mass heaters. If they are so much more efficient at creating heat from wood as compared to conventional stoves, they would certainly be very useful here as wood is hard to come by.