Improving the Energy Efficiency of Existing Windows

Improving the Energy Efficiency of Existing Windows

You can improve the energy efficiency of existing windows by doing the following:

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Adding storm windows

Reduce air leakage and some heat transfer
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Caulking and weather stripping

Reduce air leakage around windows
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Using window treatments or coverings

Reduce heat loss and/or gain

However, if your home has very old and/or inefficient windows, it might be more cost effective to replace them than to make these improvements. New, energy-efficient windows eventually pay for themselves through lower heating and cooling costs, and sometimes even lighting costs.

Improving the Energy Efficiency of Existing Windows
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Content Last Updated: September 12, 2005

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