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Most modern windows are relatively energy-efficient thanks to the double-glazed, Low-E window technology developed by Berkeley Lab in the 70s. We’re now taking energy efficiency to the next level in the form of our “super window,” which promises twice as much insulation as other ENERGY STAR®-certified windows.

By creating this “super window”, we aim :

  • To create  well-insulated, tightly sealed windows that raise the standard for air-tightness and a whole-house ventilation system.
  • To minimize the need for heating, which accounts for about 40% of residential energy use and causes seasonal spikes in energy consumption.
  • To create windows that outperform insulated walls in winter. These special custom windows can help you save on winter heating costs in the winter and air conditioning costs in the summer. 

The prototype being developed by Berkeley Lab with Andersen Windows has three components. First, a  layer of thin glass is inserted between the two layers of the double-glazed window. Then a second low-emissivity coating is applied and, finally, argon gas is replaced with krypton gas, which is much more insulating in the narrow space between the panes.

The developers are finding a way to make the window glass the same width and virtually the same weight as existing double-glazed windows. This avoids having to redesign the window sash and frame, which would pose a significant cost obstacle to market penetration. This means that your usual casement or sliding windows will still look and feel the same, but with punched up features like double insulation.

The emergence of the super window is something to look forward to in the near future, with benefits to offer like lowered utility bills and utmost comfort in differing weather conditions. If your current windows are in need of an update, call the experts at Renewal by Andersen of Austin at (866) 842-3370. Ask us for a quote today! We serve Georgetown, TX, and the surrounding communities.


"Renewal by Andersen delivered a superior product with superior customer service, the best construction, experience and all promises completed professionally and in a timely manner. All my windows were replaced in one day"

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