GB 4706.1-2005 "Safety of Household and Similar Electrical Appliances - Part 1: General Requirements": This standard specifies the safety requirements for household and similar electrical appliances, including requirements for electrical safety, mechanical safety, fire safety, and other aspects of household variable frequency heating and cooling units

GB 4706.32-2004 Safety of Household and Similar Electrical Appliances Special Requirements for Heat Pumps, Air Conditioners and Dehumidifier: This standard specifies the safety requirements for household and similar electrical appliances, including the electrical safety, mechanical safety, fire safety and other requirements for household variable frequency cooling and heating units

GB/T 1883-2007 "Indoor Air Quality Standards": This standard specifies the requirements for indoor air quality, including the limit of hazardous substances such as particulate matter, formaldehyde, benzene, etc. in the air

GB 50176-2010 "Code for Thermal Design of Civil Buildings": This standard specifies the thermal design requirements of civil buildings, including requirements for insulation, heat insulation, moisture proof, and other aspects

GB/T 19409-2003 "Technical Specifications for Air Source Heat Pump Water Heater Systems": This standard specifications the technical specifications for air source heat pump water heater systems, including requirements for unit energy efficiency ratio, referent charge rate, and other aspects

GB 19576-2013 "Unit Air Conditioning Functional Efficiency Limits and Energy Efficiency Levels": This standard specifies the energy efficiency limits and levels of unit air conditions to evaluate the energy efficiency performance of the unit

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