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DIY:: Flower Pot Heater ~ Gives a lot of heat, costs about nothing, easy to make and it looks pretty nice, too! Clay/Terracotta pots absorb the thermal energy of the candles and convert it into radiant space heat. Reaches temperatures of 160F to 180F. Heater stays hot for hours. use caution, the inner chamber can reach 500F. Heats a small area very effectively. uses 1 to 3 candles or more. How To @: www.youtube.com/...
a candle powered space heater. It sounds like science fiction, but it really is a simple and green energy device, that could save you a lot of money by only lighting a candle, in the long run. The CO2 output of a candle is too small to mention, and the materials that this device is made of are all here since the Earth exists.