ENERGY STAR helps you meet and exceed energy-efficient standards to make your building or renovation purchases easier and long-lasting. Learn how you can save money, energy and the environment with a simple window replacement.

EnergyCore EnergyCore™ is an innovative, patent-pending window system with Fusion Insulated Technology™ that offers superior thermal performance and greater energy savings.
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Argon Gas Reduces Energy Loss
Duralite® insulating glass spacer is designed to trap and retain more argon gas to reduce energy loss and increase efficiency.
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