Details: These windows have two options: Impact Level D windows, which are HVHZ certified and Impact level C windows for non-coastal areas. The windows have high-performance laminated glass, with three panes of glass and a protective interlayer and a low-E coating and argon gas fill. The corners of the thick-walled vinyl frame are fused together at high temperatures and it also has multiple internal chambers for insulative properties. Other features include a delta lock to secure sashes, foam inside the frame and a double-walled sill dam extended inside the window mainframe. The Energy Star-certified windows are available in double- and single-hung models with tilt-in sashes, lift-out sliding windows, casements and awning models, and picture windows.
Best-selling Features: Both Barcelona Level C and Level D impact windows exceed the threshold DP50 rating and also achieve an air infiltration rating of .01.