This laboratory uses the air enthalpy difference method and water-side calorimeter method to measure the cooling capacity, heating capacity, low-temperature unsteady-state heating capacity, power consumption, C.O.P., circulating air volume and seasonal energy efficiency ratio of central air conditioners or heat pumps. It can serve as an important testing device and a key means for the design and development of air conditioners and heat pumps. The laboratory conditions comply with relevant national standards.