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System doors and windows will replace ordinary doors and windows to become the future development trend

System doors and windows will replace ordinary doors and windows to become the future development trend

2018-12-20

As early as the 1980 s, Europe developed high-performance system doors and windows, and its energy-saving performance, safety performance, and comfort far exceed ordinary doors and windows. The 2003 European door and window standard requires that the K value is not more than 1.4. High-performance system doors and windows are more popular. At present, the market application has reached 70% of the total number of doors and windows, while the average K value of doors and windows in China is about 3.5 (heat preservation). The current highest standard in China-Beijing door and window standard is the K value 2.8, which is only the 1984 European door and window K value standard. According to calculations, according to China's existing urban construction area of about 43 billion square meters, if the implementation of European

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