具有两层low-e涂层和有效气体填充的三层中空玻璃单元被认为是高度绝缘的，玻璃的中心U系数低至0.57 W/m2-K（0.10 Btu/h-ft2-F）。此类装置历来采用玻璃或塑料的中心层建造，这些玻璃或塑料层一直延伸至间隔系统。本文表明，具有非结构中心层的三层玻璃系统（其边缘不形成密封）具有与标准设计一样的热效率，同时可能消除一些阻碍使用三层玻璃的生产和产品集成问题。 单位:双引文:ASHRAE交易，第114卷，pt。2、盐湖城2008

Three layer insulating glass units with two low-e coatings and an effective gas fill are known to be highly insulating, with center-of-glass U-factors as low as 0.57 W/m2-K (0.10 Btu/h-ft2-°F). Such units have historically been built with center layers of glass or plastic which extend all the way through the spacer system.This paper shows that triple glazing systems with nonstructural center layers which do not create a hermetic seal at the edge have the potential to be as thermally efficient as standard designs, while potentially removing some of the production and product integration issues that have discouraged the use of triples.Units: Dual