Windows & Doors
Tripane with Krypton
Marvin Windows and Doors offers an even more energy-efficient option for several of its window and door collections with Tripane with Krypton, which involves filling insulated glass units with a blend of three gases: krypton, argon, and air. The mix provides a U-factor of just .03. Tripane with Krypton is available on the Ultimate Casement collection, Ultimate Awning, Ultimate Double Hung, Ultimate Double Hung Magnum and Clad Insert Double Hung.