Triple-pane windows (IMAGE) DOE/Pacific Northwest National Laboratory Caption Thin triple-pane windows (right) have three panes of glass filled with an inert gas, krypton, and coated with a low-emission film to enhance energy efficiency. Credit Photo: Lawrence Berkeley National Laboratory Usage Restrictions No restrictions. License Public Domain Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.