Saw a guy pimping rocket mass heaters, for 3k.
It looked pretty simple, nice but way over priced.
Rocket mass heater - Wikipedia
en.m.wikipedia.org
Anyone have experience with these?
Might try building one, or buying, for next year
Reading that wiki, this thing sounds pretty stupid except for a hipstery functional show off piece. Good wood stoves have secondary combustion tubes and are pretty god damn efficient. Would love to see some impartial numbers, but even if they were twice as efficient i'm not sure that's worth buttfucking a whole room to build one.
edit: also looking like you can only feed smaller pieces of wood into it, which can't be efficient
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