400 Series

Contoured frame design with integral nailing fin.
Dual-paned glass unit can be ordered with optional Low E glass and an Argon gas fill to maximize energy efficiency.
Insulating glass unit is set ½” into the sash to keep edges warmer.
Frames and sash, welded at the corners, create strong, effective units.
Weatherseals placed at key points around each sash improve performance by reducing air flow.
The U-channel spacer system is
more efficient than conventional box spacers — raising interior glass surface temperature by reducing conduction rates.
Contoured grids are located inside the insulating glass unit for a smooth, easy-to-clean surface.
Available with wood or Quick Trim™ cellular pvc jamb extensions — choose either 4-9/16″ or 6-9/16″ construction — for quicker installation.
Comprehensive warranty.