Credit: EcoDrain
Heating water is a major part of your household energy bill, & a major part of the hot water use is in your shower.
In the shower, heated water exits the shower head, runs down your body & into the drain, taking that heat energy you paid for, with it.
EcoDrain extracts much of the heat energy from the water leaving via the drain, & adds it to the cold water entering the water heater or the cold water tap (depending on how you heat the water at your house).
You may recognise from the description & the diagram that EcoDrain is a heat exchanger. Nothing new about that. What is noteworthy is a relatively inexpensive device which is relatively easy to retrofit, or incorporate into a new installation.
EcoDrain claim a payback period of 2.3 years.
http://www.gizmag.com/ecodrain-drain-heat-exchanger/32858/
http://www.digitaltrends.com/home/ecodrain-recycles-wasted-heat-used-hot-water
Manufacturer's website:
https://ecodrain.com/en/
FAQs:
https://ecodrain.com/en/faq/ / gas electricity electric electrical solar heat heating power energy bill utility solar PV thermal cost plumbing plumbing do it yourself drain /
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