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Old 06-14-11, 08:01 PM   #47
osolemio
Hong Kong
 
Join Date: May 2010
Location: Hong Kong
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Quote:
Originally Posted by Piwoslaw View Post
Osolemio, could you just heat rainwater for showering through a heat exchanger? The hot mains water wouldn't mix, only give off some of its heat.
Yes, that is one solution. But if you want to keep the comfort of being able to adjust the temperature, not just a fixed one, you would still need to have hot and cold separately.

For me it is no issue, though, as I have so many heat buffers in my system so I could really have a heat exchanger for this purpose. The question is whether or not it is getting too complicated and expensive, to have a parallel heating system, for rainwater ...
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Space heating/cooling and water heating by solar, Annual Geo Solar, drainwater heat recovery, Solar PV (to grid), rainwater recovery and more ...
Installing all this in a house from 1980, Copenhagen, Denmark. Living in Hong Kong. Main goal: Developing "Diffuse Light Concentration" technology for solar thermal.
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