(Image: Renewability)
Power pipe is a simple and snazzy heat exchanger. You wrap your bathtub drain pipe with layers of highly conductive copper coils and voila your incoming cold water is heated by your outgoing hot water, reducing your energy bills substantially. While plumbing is never a hot topic around my dinner table we must admit that this pipe is a clever little fellow!
For more on keeping it hot this winter check out Human Heat!
(Spotted on Inhabitat)
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