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See Chinese contents: GB 19577-2024 GB 19577-2024: Minimum allowable values of the energy efficiency and energy efficiency grades for heat pumps and water chillers
This document specifies the technical requirements for the minimum allowable values of the energy efficiency and energy efficiency grades for heat pumps and water chillers, describes the corresponding test methods, and clarifies the implementation of this document. The types of heat pumps and chillers to which this document applies include water chilling (heat pump) packages using the vapor compression, low ambient temperature air source heat pump (water chilling) packages, water-source (ground-source) heat pumps, lithium bromide absorption water chillers (heaters), water-source high temperature heat pumps using the vapor compression cycle, indirect evaporative cooling water chillers, and integrated water chilling (heat pump) packages.
