COR Vision. This aluminum sliding door system boasts modern aesthetics and exceptional thermal performance. Its elegant design relies on ultra-thin profiles, which make up only 9-14% of the entire structure. With the 6esg/16sws/6t esg package, Ug = 1.1 W/(m²K) when argon-filled with an aluminum frame, and Uw = 1.4 W/(m²K)*. This coefficient is calculated for a door measuring 3200 x 2500 mm.