Keeping your home comfortable and energy efficient
Insulation performance is measured to determine how effectively a window keeps heat in a home. Better insulation in windows means lower energy costs, and just as important: improved comfort on cold winter days. Insulation performance is measured in U-values. The U-value is a measure of heat loss through a window; therefore a lower U-value means better insulation performance. In the past windows typically had U-values of around .48. Gilkey System 10 Windows (with R10 insulation) are truly energy efficient, offering glass that is 64% better at keeping winter heat in your home compared to Soft Coat Low-E with argon gas. This superior performance will make your home more energy efficient and comfortable. The chart below compares the insulating performance of different glazing products.
You should select a window with lower U-values if:
- Reducing heating costs is a factor in your window investment.
- Your home has large areas of glass.
- Improving the insulating value of your windows may be necessary to comply with local energy codes.
- You sit near your windows in the winter.
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