Low-emissivity Colored Glass

Pittsburgh-based company PPG has come out with three new colors for their insulating glass units (IGUs), Ultra-Clear, Optiblue and Optigray. Two of the IGUs are Solarban 90 low-emissivity glass and they blocks heat gain 15 percent more effectively than the Solarban 70XL. PPG designed this glass to give architects more options when balancing performance and aesthetics for projects. In a standard 1-inch IGU, the Solarban 90 Optigray comes in a warm gray appearance with a high visible light transmittance (VLT) of 36 percent and a solar-heat gain coefficient (SHGC) of 0.20. The Solarban 90 Optiblue has a steely blue look with a VLT of 32 percent and a SHGC of 0.19. The third type, Starphire Ultra-Clear, is the most neutral of the three. However, it is not a low-emissivity glass. It has a low-iron formulation with a VLT of 54 percent and a SHGC of 0.23.

PPG