GB 29541-2013: Translated English of Chinese Standard. GB29541-2013: Minimum allowable values of the energy efficiency and energy efficiency grades for heat pump water heaters
https://www.chinesestandard.net, 2018 M07 21 - 4 pages
This standard specifies the energy efficiency limit value, energy conservation evaluation value, energy efficiency rating, test method and inspection rules of heat pump water heaters. This standard is applicable to water heater driven by electric motor, using vapor compression refrigeration cycle, using air as heat source and for the purposes of supplying hot water. This standard does not apply to water source type heat pump water heaters.
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Energy efficiency grade
Energy efficiency limit