Potential of WASTE WATER HEAT RECOVERY in reducing the EU's energy need

Pavel Sevela, Johannes Frenger, Jürgen Schnieders & Rainer Pfluger
After extensive research, Waste-Water Heat-Recovery (WWHR) technology was identified as the most promising technology to unlock the under-addressed potential in reducing the energy need for water heating. Particularly interesting application of WWHR is for showering, which accounts for about 70 to 82 % of the daily residential hot water tapping profile. Shower-wise installed heat-exchangers offer a cost-effective way of utilizing otherwise wasted heat for preheating cold fresh water, thus reducing the temperature span covered by...
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