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Thermal Performance – Polaris
About Lesson

Click here to view the thermal performance of Polaris Windows.


The Polaris Windows Thermal Performance page discusses the different factors that affect the thermal performance of windows, such as the U-factor, Solar Heat Gain Coefficient (SHGC), and Visible Transmittance (VT). The page also includes information about how to improve the thermal performance of your windows.

Here are some of the key points from the page:

  • The U-factor is a measure of how well a window insulates. A lower U-factor means a better insulator.
  • The SHGC is a measure of how much solar heat a window lets in. A lower SHGC means less solar heat gain.
  • The VT is a measure of how much light a window lets in. A higher VT means more light.

To improve the thermal performance of your windows, you can:

  • Choose windows with a low U-factor and SHGC.
  • Install storm windows or solar shades.
  • Seal any air leaks around your windows.

By improving the thermal performance of your windows, you can save money on your energy bills and make your home more comfortable.

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