The performance of heat pump water heaters is mainly reflected in energy efficiency, safety, environmental friendliness, applicable environment, and intelligent features.
COP (Coefficient of Performance) is a key indicator for measuring heat pump efficiency, defined as the ratio of output heat (Q) to input electrical energy (W), i.e., COP = Q / W.
A COP value greater than 1 indicates energy saving. For example, a COP of 3.0 means that consuming 1kW of electrical energy can produce 3kW of heat.
Actual COP is affected by ambient temperature:
Above ambient temperature (0℃), COP is typically ≥2.
Under standard operating conditions (ambient temperature 20℃, outlet water temperature 55℃), high-efficiency models can achieve a COP of 3.69.
Under special operating conditions, such as CO₂ heat pumps, the COP can reach as high as 5.77 in specific tests.