NanaWall Systems’ WA67 with argon-filled low-E triple glazing contributes to highly energy-efficient home designs, meets Energy Star requirements, and has a NFRC-certified U-value of 0.17 and a solar-heat-gain coefficient of 0.26. It is also high-water- and air-resistant, and in-swing and out-swing models with a raised sill showed no water leakage at 12 pounds per square foot or 68 miles per hour. It can be specified for openings from 3' to 39' and is available in 50 stacking configurations and 200 aluminum finishes for the exterior and various wood choices (including FSC-certified options) for the interior surfaces.