3. W. WINDOWS

  • Consumers can save up to $150 to $500 a year (depending on local climate) by replacing single-paned windows with windows that have earned the ENERGY STAR (save up to $70-$250 when replacing double-pane clear glass windows).
    Source: Lawrence Berkeley National Laboratory Analysis for U.S. DOE. 2008 ENERGY STAR Windows Revisions — Technical Analysis.

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Updated: December 2012