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To: Freeport

He’d get better results if he tried to do the same thing with the waste water from shower, dishwasher and clothes washer drains instead of the incoming water.

However, I have my doubts that the efficiency numbers work out, or enough to justify the cost of the equipment.


5 posted on 04/05/2013 10:42:47 AM PDT by kidd
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To: kidd

I know a guy who installed a drain-water heat-exchanger; from the temperature deltas and flow rates he said he was seeing, I figured he was getting an effective 7kw from it using the warm drain water to preheat the replacement water flowing into the water heater.


7 posted on 04/05/2013 10:47:30 AM PDT by DuncanWaring (The Lord uses the good ones; the bad ones use the Lord.)
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