GB/T 25857-2022
ActiveLow ambient temperature air source multi-connected heat pump（air-conditioning）unit
低环境温度空气源多联式热泵（空调）机组
Application Summary AI generated
This standard specifies technical requirements, test methods, and performance criteria for multi-connected heat pump (air-conditioning) units designed to operate efficiently in low ambient temperatures. It is applied in the design, manufacturing, and performance evaluation of these units used for heating and cooling in residential, commercial, and industrial buildings in cold climate regions. The standard ensures reliable operation and energy efficiency under conditions where outdoor temperatures drop significantly, such as in northern China during winter.
Related Standards
GB 25130-2010
Safety requirements for unitary air conditioners
GB 25131-2010
Safety requirements for water chilling (heat pump) packages using the vapor compression cycle
GB/T 19569-2004
Air conditioning unit for clean operating room
GB/T 18835-2002
Grain chillers
GB/T 18836-2002
Ducted air-conditioning(heat pump) units
GB/T 18517-2001
Terminology of refrigeration
GB/T 7778-2001
Number designation and safety classification of refrigerants
GB/T 7941-1987
Testing of refrigerating systems
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