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EcoDrain heat exchanger makes good use of warm waste water

Darren Murph
03.26.09
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File this one directly in the "why didn't I think of that?" folder. As the bathroom gets more and more eco-friendly, the EcoDrain is stepping in to take advantage of all the hot water that goes to waste each time you shower. Put simply, this user-installed heat exchanger transfers heat from hot shower waste water to cold incoming water, essentially cutting water heater usage by as much as 40 percent. Of course, we've never seen a plumbing job that was anything close to simple, but for savings like this, it may just be worth the trouble.

[Via Inhabitat]