Windows can have a major impact on the heating and cooling loads of a building. Up to 40 per cent of a home’s heating energy can be lost and up to 87 per cent of its heat gained through windows.

Improving windows’ thermal performance reduces energy costs and greenhouse gas emissions. The increasing propensity for highly glazed skyscrapers, especially, is seeing the increasing consideration of low-e glazing to combat this. The Solar Heat Gain Co-efficient (SHGC) for windows measures how readily heat from direct sunlight flows through a window system….