The S. 83 slider door from Panda Windows & Doors is a slim profile aluminum multi-slide glass door with a thermally broken profile and frame. Two separate aluminum extrusions are crimped together using a polyamide iso-bar. The system achieved a 0.29 U-value in simulated testing utilizing a triple pane insulated glass unit. Total panel size may be up to 12 feet in
height and up to 6 feet in width.