Open Wide: The 400 Series casement window can be outfitted with a variety of glazing options such as Low-E4 or Low-E4 SmartSun to achieve a U-factor of 0.28 and a solar heat gain coefficient of 0.21. Each window has a pine or primed interior and a low-maintenance exterior cladding that comes in four colors. A variety of art glass, grille patterns, and screens are available. Andersen Corp. 800-426-4261. www.andersenwindows.com.