PPG Industries’ low-emissivity Sungate 600 glass helps interiors retain heat in cold, northern climates. An IGU incorporating the glass, which has a pyrolitic coating on the exposed room-side surface, can achieve an insulation value of R5. Capable of blocking 57% of incoming UV energy, Sungate 600 has a solar heat gain coefficient of 0.70 and a visible transmittance of 0.72. • ppg.com