Windows, Doors, and Skylights
Energy-efficient windows, doors, and skylights—also known as fenestration—can help lower a home's heating, cooling, and lighting costs.
Learn about their energy performance ratings and how to maximize their energy efficiency in your home:
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Exterior Doors
Select energy-efficient doors or improve the energy efficiency of existing ones.
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Skylights
Select energy-efficient skylights.
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Windows
Select energy-efficient windows or improve the energy efficiency of existing ones.