New Invention Heating Water with Cold Water

One inventor in  San Diego has developed a way to heat a home’s hot water by using the excess heat from cold water.

Most homes use three to four times as much cold water as warm water, with the temperature of the cold water averaging over 70ºF throughout the year—about 15º to 20ºF degrees warmer than necessary.

To take advantage of this extra heat, the prototype system uses a small water-to-water heat pump to extract the excess heat from the cold water and deliver it to a conventional 50-gallon water heater.

During the tests, this device was able to improve water heating efficiency by up to 50 percent over conventional heaters.  This invention is already patented by the inventor  and the inventor is now seeking funds and a manufacturer.