The sturdy aluminum frame mounts on the indoor side of your existing windows or sliding doors. Weatherstripping seals the window to eliminate drafts and create a thermal barrier.
The Advanced Energy Panel frame has two separate surfaces (front and back) of clear glazing material which trap a 7/16" pocket of air between them. A second air pocket is created between the Advanced Energy Panel and your existing window.
This technology triples the insulation value of your windows and can save you as much as 55% on your annual heating bills.