From: New and Notable

Combining three panes of glass, a 50/50 blend of argon and krypton gas fill, two SolarControl Plus low-E coatings, and an Intercept spacer system, the Energy Star–qualified Solar Master III triple-glass system offers a U-value of 0.19, and an SHGC of 0.26, says the firm. Double-hung units with Solar Master III carry Green Seal certification. 724.465.1800.