Insulated Glass Clear Greenhouse Heatproof Fire Resistant Soundproof Building Curtain Wall Window Glass

Double-pane glass, also called dual pane or insulated glass, is the best way to go. Unlike single pane, double pane glass has an outer layer of glass separated by a half inch of air or gas like argon or carbon dioxide, followed by the second layer of glass. This air pocket helps boost the thermal performance of the window by adding an extra layer of protection. It's the same idea that makes a coffee thermos work so effectively.