Triple-pane windows use IG to deliver top-notch performance. An IG unit consists of two or three panes of glass, held apart and sealed together with spacers to create an airtight barrier. These units often include Low-E coatings, which help block harmful UV and infrared rays, and are filled with inert gases like argon or krypton for better insulation than regular air. Much like an engine powers a car's efficiency and longevity, the IG unit is critical to how well your windows perform. The right IG unit enhances energy efficiency, reduces noise, and ensures lasting comfort in your home. Choosing the right “glass package” can make all the difference in the durability and performance of your new windows.