Patent ID: 7827814

Claim:
A geothermal heat pump water heater system comprising, an open loop system that draws water from an outside water source, a hot water tank, a cold water tank, at least one water-to-water heat pump (WWHP), the water-to-water heat pump comprising one or more heat exchangers that transfer latent heat from water drawn directly from said outside water source, wherein said water is supplied to both the hot water tank and the cold water tank, said heat exchangers comprising a cold water side heat exchanger and a hot water side heat exchanger, wherein water entering the cold water tank is cooled by the cold water side heat exchanger and returned to the cold water tank to be used for domestic or commercial purposes and wherein water entering the hot water tank is supplied to a hot water side heat exchanger, the heated water being returned to the hot water tank to be used for domestic or commercial purposes.