Moderately reflective with 47% visible light transmittance, Vistacool Atlantica from PPG Industries features an emerald tint. When paired with conventional clear glass in a 1" insulating glass unit, it has a solar heat gain coefficient of 0.35 and a light-to-solar gain ratio of 1.32. It can also be combined with Solarban 70XL glass or Sungate 500 glass. ppg.com
Jennifer Brite is a design journalist and public-health scientist who writes about new products and sustainable design.