[TEP_Kim_Il_Sung]

So use a rocket stove? Burns too hot and efficient to leave residue.

[yibg]

Yeah, let me just dig the old rocket stove out of the basement and fire it up.

[TEP_Kim_Il_Sung]

They are fairly easy and cheap to construct, plenty of guides for rocket stoves, and rocket mass heaters.

Want to heat an entire garage 24h with a hand full of twigs? An ordinary oven can't cope.