We recently introduced our NEW R5-rated double hung, slider, casement, and picture windows. These triple-pane windows
feature the highest quality glass available, Cardinal LoE 366 with three layers of silver, to keep solar gain at a minimum while
letting visible light in.

Combined with Parco's proprietary manufacturing process, the finished product delivers a superior level of insulation that can reduce heat-loss by up to 40% over common Energy-Star R3 windows.