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Energy Tax Credit
Renewal by Andersen® windows and patio doors with High-Performance™ Low-E4™ glass can reduce energy bills by 25% in the summer and 10% in the winter*. If you purchased and installed qualifying Renewal by Andersen® windows and doors after December 31, 2006 and before January 1, 2008, you may be eligible to claim a Federal tax credit of up to $500 on your 2007 tax return. Click here for more details.
Energy Efficient Windows
Poor-performing windows can lose up to 40 percent* of heating energy in winter. With the high cost of energy, that’s a lot of money going right out the window! Even worse (and often overlooked), poor-performing windows can lose up to 50 percent* of a home’s cooling energy in summer. It’s expensive to have worn-out or inefficient windows.
*Windows & Doors - MN Dept. of Commerce Energy Information
Shopping for energy efficient replacement windows can be confusing, but an important factor to keep in mind is whole window performance. Renewal by Andersen’s outstanding whole window performance is the result of our patented Fibrex® framing material, Andersen High-Performance™ Low-E4™ double pane glass, and professional installation.

Together, these elements will keep your home 35% more energy efficient in winter and 41% more efficient in summer*. Depending on where you live, that can cut your energy bills by up to 25%**
What’s the easiest and most accurate way to compare the energy efficiency of windows? Be sure the window displays an NFRC label. This label means the entire window unit has been tested, not just the center of the glass or part of the frame. The U-Factor is a better indicator of window performance than R-value. The lower the U-Factor the better the insulation properties.
For more information about energy efficient window performance, see also:
Components To Energy Efficient Glass
Questions To Ask About Framing Material
* 35% more energy efficient in winter and 41% in summer, as compared to ordinary dual pane glass.
**A study of identical homes comparing Low-E4™ glass to ordinary glass showed a 25% savings on cooling bills, 10% on heating. Savings may vary geographically.
The NFRC logo is a registered trademark of the National Fenestration Rating Council.
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