Your decisions regarding the type of windows to install will have a significant impact on your home's overall energy use. Your decisions regarding the type of windows to install will have a significant impact on your home's overall energy use. High efficiency windows (double pane, Low-E) can save up to 17% on cooling costs and 2% on heating costs compared to standard single pane windows. For possible available rebates, check with your local electric utility provider.
Appliance Selection Tips
- Look for windows with these energy saving features: double panes; low-e coatings; low conductivity gas-fill between panes; and wood, vinyl or fiberglass frames.
- Consider ENERGY STAR®-qualified windows. They will help keep your home cooler in the summer and warmer in the winter, and can help you save up to 15% on your cooling costs.
- Look for the NFRC (National Fenestration Rating Council)* label as your guide to window energy performance. A window's ability to insulate is given by its U-value, and the lower the U-value, the more efficient the window.
- Select windows with low air leakage ratings–between 0.01 and 0.06 cfm/ft.
- Choose windows with larger, unbroken glazing surfaces.
- To ensure that your new windows perform as well as they should, hire a skilled contractor to install them.
- Low-interest financing may be available for the installation of energy-efficient measures.
Where can I get more information about windows?
- Department of Energy - Energy Efficiency and Renewable Energy at www.eere.energy.gov*
- Efficient Windows Collaborative at www.efficientwindows.org*
The actual energy savings obtained in each instance depend on various factors, including geographic location, weather conditions, equipment installed, usage rates, and so forth. Completing multiple energy saving measures will not necessarily result in cumulative savings. Any rebates provided are subject to satisfaction of applicable qualification rules. Certain rebate programs may be modified by the California Public Utilities Commission (CPUC), and are subject to the availability of funds.