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Efficient Windows Collaborative


Welcome to the Efficient Windows Collaborative

YOUR GATEWAY TO INFORMATION ON HOW TO CHOOSE ENERGY-EFFICIENT RESIDENTIAL WINDOWS

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This site provides unbiased information on the benefits of energy-efficient windows, descriptions of how they work, and recommendations for their selection and use. The Efficient Windows Collaborative (EWC) is a nonprofit, 501(c)3 organization that partners with window, door, skylight, and component manufacturers, research organizations, federal, state and local government agencies, and others interested in expanding the market for high-efficiency fenestration products. EWC's members have made a commitment to manufacture and promote energy-efficient windows.

Selecting Windows for New Construction

Window Selection Tool

Selection Process

Design Guidance

Installation

Quick Links

What's New

The Window Selection Tool mobile app is currently available and can be downloaded on iTunes.


 

New Construction Windows

Replacement Windows

Understanding Windows

Resources & Information

EWC Information