What is the definition of a water furnace heat pump? A water furnace heat pump is a device that uses thermodynamic principles to transfer heat from one source to another. This type of heat pump uses a circulating liquid to absorb and release heat, acting as an efficient energy transfer system. The water furnace heat pump can be an excellent choice for both residential and commercial applications due to its high efficiency, cost-effectiveness, and performance. The basic function of a water furnace heat pump is to transfer heat between two sources; the source being the heat source, and the sink being the area where the heat is to be transferred. The pump circulates a liquid such as water, refrigerant, or another fluid, and it creates a pressure difference between the two sources. This pressure difference is what causes the heat to move from one source to the other. The efficiency of the water furnace heat pump is usually determined by its coefficient of performance (COP). The higher the COP, the more efficient the