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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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Efficient Windows Collaborative (EWC) members have made a commitment to manufacture and promote energy-efficient windows. This site provides unbiased information on the benefits of energy-efficient windows, descriptions of how they work, and recommendations for their selection and use.

 

Selecting Windows for New Construction

Window Selection Tool

Selection Process

Design Guidance

Installation

 

New Construction Windows

Replacement Windows

Understanding Windows

Resources & Information

EWC Information