Wow, great idea, and the manufacturer actually explains it for DIY-ers! It doesn't really heat a whole house, but for a small hut, it could work on cold spring/fall evenings when you don't want to start the wood stove. You could use it in a small room.
Warm a Room with Only a Candle and a Few Terra Cotta Pots.The terra cotta pots concentrate the heat using convection. While you won’t heat a whole house with it, it can definitely warm your hands and make a cold night much more bearable .
Bowen Knife Company are selling this ingenious and stealthy combination of a knife buckle and leather belt. Most knives are annoying to conceal and carry around, this handy Belt Knife Buckle can quickly be removed from the leather belt sheath when ca