It's crystal clear that Crystal Windows & Doors makes windows and doors. The company manufactures energy-efficient vinyl and aluminum windows and aluminum doors for residential and commercial buildings. The company provides related services, including aluminum extrusion and ornamental fencing fabrication; subsidiary Helios Energy Systems designs and installs solar power systems. Crystal sells its products through a network of dealers in some 35 states, largely in the eastern US. Internationally, the company makes and sells window system components in China and provides fenestration system engineering and design services in Asia. CEO and owner Thomas Chen, a Taiwanese immigrant, founded Crystal in 1990.