China's building energy consumption accounts for about 33% of the country's total energy consumption.Doors and windows as an important part of the building envelope is the wakest link of barrier the outdoor energy.Doors and windows energy loss accounted 50% of building energy consumption,which energy loss through glass accounted 75% of Doors and windows.The solar heat and ground heat into the room through the window in the summer increase 73% cooling energy consumption;in winter the loss of heat through the window to the outside increase 58% Heating energy consumption.Energy-saving glass is the key to building energy efficiency.The passive house glass makes building the minimized need of building heating and air conditioning.
CNG actively participate the preparation of countries and industries standards in building energy -saving products and industry market normative guidance.It is main drafting units of building energy -saving glass,a passive low-energy building glass and other glass standard.CNG passive house glass is is the first one to get industry certification.
Passive house glass key energy-saving targets:Visible light transmittance,Total solar infrared energy transmittance glR,heat transfer coefficient K.
