To achieve this second aim, a double-glazed unit with a reflective outer layer is combined with a low-emissivity-coated inner layer to reflect transmitted heat outwards.

• 为达到后者的目的，外侧玻璃带有反射镀层的双层玻璃在内侧玻璃上结合了低发射率镀层，将透射进来的热量反射出去。