Will New Windows Actually Lower My Energy Bills?
Yes, replacement windows can lower energy bills when they replace old, inefficient, drafty, or poorly performing windows—but the amount varies from house to house. The biggest factors include the condition of the existing windows, the new window’s U-factor and glass package, air leakage, installation quality, the amount of glass in the home, insulation, HVAC efficiency, and homeowner habits. ENERGY STAR reports that upgrading to ENERGY STAR certified windows lowers household energy bills by an average of about 12%, but homeowners should be cautious of anyone promising an exact savings percentage for an individual home.
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