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My windows have storm windows. I am looking at replacing these windows with new ENERGY STAR qualified windows, but they don't have a storm window. Does not having a storm window reduce their efficiency? Follow

When installed in combination with older, less efficient windows, storm windows enhance efficiency by creating another barrier between the interior of you home and the weather outside. However, ENERGY STAR certified windows Opens a New Window.  are designed with advanced technologies like multiple panes of glass, insulated frames, special coatings, and inert gas fills which perform better than single pane windows and a clear glass storm window. If you do decide to replace your current windows with ENERGY STAR certified windows, storm windows would not be necessary to achieve a high level of energy efficiency.


Learn more about ENERGY STAR certified residential windows, doors and skylights at www.energystar.gov/windows.


Sometimes replacing windows is not possible due to historic district restrictions or the homeowner cannot afford full replacement costs. To help address this, EPA is working a specification for low-emissivity (low-e) storm windows.  


Learn more about the development of ENERGY STAR certified residential storm windows.

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