Water Heat Pump systems uses well water as the heat source.
Water-Water Heat Pump absorb heat energy from water (well, lakes, rivers ) and gives it off to the hot source.
This instrument obtains its heat by first having a well drilled to draw out the heat supply. The supply, in this case groundwater. Ground water is mainly adequate as a heat source for a heat pump because it has a constant temperature of 8 to 12 °C even in case of low outside temperatures. After is drained up and out to deliver its heat onto the pump before going back underground through of a secondary well (return well). This process repeats, making the pump highly rich in required temperature adaptability.
Well-to-well or open loop
The incoming water temperature of an open loop system is about 7°C higher than a closed loop system. Water sources with high levels of chlorides, salt or other minerals can cause untimely system failure or inefficient operation.