规定了确定单回路空气源热泵热水器能量性能特性的试验条件和试验程序。它既适用于独立热泵热水器，也适用于冷凝器与储水箱集成的热泵。包括根据热泵热水器最低性能要求评估性能的性能测试。

Specifies the test conditions and test procedures for determining the energy performance characteristics of single-circuit air source heat pump water heaters. It applies to both stand-alone heat pump water heaters and heat pumps with the condenser integral with a storage tank. Includes a performance test for assessing performance against minimum performance requirements for heat pump water heaters.