11.09.2006

Drain-Water Heat Recovery



After space heating, water heating is the second most costly energy demand in homes, accounting for 20-30% of energy consumption. Likewise, drain-water is easily one of the largest overlooked sources of energy savings in commercial and commercial enterprises. Approximately $40 billion dollars goes down the drain in North American each year.

When warm water goes down the drain, it carries away valuable energy with it. Ninety percent of the energy used to heat water in a home can be washed out to the sewer. Drain-water heat recovery (DWHR) systems can re-capture some or most of this valuable energy and use it to preheat cold fresh water. There are many ways that DWHR units are deployed in commercial and industrial installations, while there is one primary and simple method for residential installations.

Renewability

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