Found this at Green Building Elements. Could be a nice addition to a low energy consuming environment.., like an Earthship. You can buy these in the States for a meager 30 bucks.., that’s just 20 Euros.., without postage. Or you can try and make one yourself.., it is doable. Luckily, Heat Stick explains how they made them…
Turn a Candle Into a Radiator
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