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 .
Building a small Clay Pot Radiator allows you to capture the heat generated from a candle, and slowly build it up inside a makeshift radiator. The heat can be used to heat a small closet during a winter weather emergency.
Candle heater captures the hearts of funders on Indiegogo
Candle Powered Heater - I& been looking a various ways to make these and this guy has by far the best setup. It isn& so much a how-to video. He is just showing what he used to construct his version of the terra cotta pot candle heater.