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建筑物在冬季从窗户散失的热量是很大的。据美国统计,建筑物通过窗户散失的能量约占建筑物消耗能量的30%。在瑞典占的比例更大,约70%。我国统计资料表明约占50%。国内外的实践证明,提高建筑物围护结构的保温性能,特别是提高窗户的保温性能是防止建筑物热量散失的最经济、最有效的方法。中空玻璃在建筑上的应用起到了关键的作用。据美国资料报导,高层办公楼采用银灰色中空玻璃每平方英尺每年采暖能耗为5 494kJ,比用单层玻璃窗节能约2/3(单层玻璃窗每平方英尺每年采暖能耗为17 775kJ)。
The heat lost from the window of the building in winter is great. According to U.S. statistics, buildings dissipate about 30% of the building's energy consumption through windows. In Sweden accounted for a larger proportion, about 70%. Our statistics show that about 50%. The practice at home and abroad proves that it is the most economical and effective way to prevent the heat loss of the building from increasing the thermal insulation performance of the building envelope structure, and especially improving the thermal insulation performance of the window. Insulating glass in the construction of the application has played a key role. According to the U.S. data, heating energy consumption per square foot of silver gray glass for high-rise office buildings is 5 494 kJ per year, which is about 2/3 less than that of single-pane glass windows (17 775 kJ / sq ft per year for single-glazed windows) ).