Warm-edge Intercept^® insulated glass reduces thermal transfer around the glass perimeter by utilizing a unique U-shaped channel to separate glass panes and interrupt the natural flow of heat to cold. 

Most spacer systems use four separate pieces of aluminum joined together by corner keys.  Intercept is one continuous piece creating a stronger, more energy-efficient insulated glass unit. Plus it flexes with glass expansion and contraction to ensure a strong seal for the life of the window.