Here's a thing that sounds awesome! It's a different way of constructing a fire place that gives off more heat but only uses 1 tenth the wood. You can find YouTube videos on people using them, but this kick starter shows you how to build them!!
paul wheaton is raising funds for Rocket Mass Heaters 4-DVD Set on Kickstarter! The absurdly efficient, ridiculously cheap, surprisingly comfortable way to heat your home
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