Standard Unit with clear glass, conventional aluminum spacer, and air fill.	UltraShield Insulated Glass unit with Intercept® spacer.
UltraShield Glass keeps you warmer in the winter The overall U-Value (insulating value) of windows with UltraShield glass is about 29% better than standard clear insulating glass. (Lower U-values mean higher insulating performance. R = 1/U)**
	Winter Furnace Heat
	Window U-Value=0.49	Window U-Value=0.28
UltraShield Glass keeps you cooler in the summer UltraShield glass transmits about 46% less solar energy than standard clear insulating glass.* Solar Heat Gain Coefficient (SHGC) is a measure of how much solar heat is transmitted through the glass. (Lower numbers mean less summer heat.)**
	Summer Solar Heat
	SHGC=0.57	SHGC=0.57
UltraShield glass reduces U.V. Energy and allows visible light UltraShield glass is about 72% more effective at reducing fabric-fading ultraviolet (U.V.) energy yet still allows about 88% as much visible light in as standard clear insulating glass.*
	Ultraviolet Energy=58% Visible Light=81%	Ultraviolet Energy=16% Visible Light=71%
*Comparisons are based on center of glass measurements of 3/4" insulating glass units; two 1/8" (3mm) glass panes and a 1/2" (12mm) air space. Actual glass performance may differ silghtly due to glass thickness and glass to frame ratio. **All comparisons performed on a  residential window size: 36" x 60"     UltraShield glass allows natural light to enter freely. In winter, indoor heat energy is reflected back into the home. In summer, outdoor heat energy is reflected back outside. In winter, UltraShield glass transmits the sun's visible light and direct solar shortwave infrared energy into the home. At the same time, it reflects long wave infrared (heat) energy - like that which comes from a home's heating system back into the room, helping to keep homes warmer. Because UltraShield glass also reduce relative heat gain, it can help keep homes cooler in summer. The result is year-round energy efficiency and comfort. Comfort, in fact, is a key benefit of windows with UltraShield glass. In winter, it keeps the roomside glass surface of a window warmer than uncoated glass, helping to eliminate that drafty feeling near windows and sliding glass doors. And, it reduces formation of condensation on the interior perimeter of the glass surface, which can damage window sash. UltraShield glass also reduces transmittance of ultraviolet light, which can degrade and fade fabrics, rugs, draperies and furniture.