Heat pump provides heat energyfrom

A heat pump is a device that provides heat energyfrom a source of heat to a destination called a "heat sink". Heatpumps are designed to move thermal energy opposite to the direction ofspontaneous heat flow by absorbing heat from a cold space and release it to awarmer one, and vice-versa. A heat pump uses some amount of external power toaccomplish the work of transferring energy from the heat source to the heatsink.

While air conditioners and freezers arefamiliar examples of heat pumps, the term "heat pump" is more generaland applies to many HVACdevices used for space heating or space cooling. When a heat pump is used forheating, it employs the same basic refrigeration-type cycle used byan air conditioner or a refrigerator, but in the opposite direction - releasingheat into the air-conditioned space rather than the surrounding environment. Inthis use, heat pumps generally draw heat from the cooler external air or fromthe ground.