Improving the Energy Efficiency of Existing Windows
You can improve the energy efficiency of existing windows by doing the following:
Adding storm windows
Reduce air leakage and some heat transfer
Caulking and weather stripping
Reduce air leakage around windows
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.
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Financing & Incentives
Find Federal Tax Credits for Energy Efficiency
Energy Savers
