Schueco Unitized System Installation of pre-assembled Schueco Unitized façade panels. Glass Specifications Use of 28mm thick Viracon Low-E glass, type VRE1-46, to enhance thermal efficiency. Spider Glass System Implementation of the Spider glass system to maximize natural light and external views. Aluminum Framed Glass Walls and Doors Construction of aluminum-framed glass walls, doors, and windows for high durability and energy efficiency.