Instead of one layer of glass, double pane models have two layers. These two layers are separated from each other by a thin layer of empty space. The air trapped inside this space serves as the window’s insulation. The air between the two panes of glass traps the outside air temperature inside. As colder temperatures make their way through the first layer of glass, the cold air gets trapped in the middle. In other words, the cold never makes its way through the second layer of glass and helps you enjoy consistent home temperatures. Double-layered windows provide an airtight seal and keep the inside of your home nice and cozy just as you like it. Furthermore, they provide enhanced insulation, protect against energy loss, and keep your utility bills to a minimum. In fact, your savings with a double pane window can be as much as 24% during the winter and 18% during the summer. The double panes also block the outside noise. Double glass windows cost more than single-pane windows, but their features make your investment totally worth it as you will save money in the long run.