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What Is a Good SHGC Rating for Your New Windows?

Solar heat gain coefficient (or SHGC) ratings are often mentioned in discussions about window energy performance. SHGC refers to the amount of solar radiation that is transferred via windows and released as heat inside the home. When choosing new windows for your home, it’s important that you take their SHGC rating into account. The trusted windows and patio doors installation company in the area, Renewal by Andersen® of Long Island expounds on this here.

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Good SHGC Ratings for Windows Depend on Location

When a window has a low SHGC rating, it transmits only a small amount of solar heat. But if it comes with a higher number, the window admits significantly more solar radiation into your home, allowing for a warmer indoor environment. These are either a good or bad thing depending on where you live. For example:

  • In colder regions, windows with a high SHGC rating are the better choice. The Northern regions are generally heating-dominated. Windows with an SHGC rating of about 0.30 up to 0.60 ensure your home can maximize the heat generated by sunlight. Since they help warm your home naturally, these windows can lower your reliance on your heating system, which in turn, allows for reduced energy costs on your next utility bill. To further optimize this, make sure the glass in your exterior patio doors also come with a high SHGC rating.

  • In warmer climates, pick windows with a lower SHGC rating. This is especially important in Southern regions. Because of their predominantly warm climate, it’s important that homes there are kept cooler for longer periods to ensure greater comfort. For those living in the South, make sure to pick windows with an SHGC rating less than 0.27.

What about regions with a mixed climate? 

In the Northeastern and Midwest regions, most homes use both heating and cooling (with cooling being used less often). The best options here are new windows with an SHGC rating less than 0.40. 

And in Southeast New York?

This region, where Long Island is located, also has a mixed climate. Because of the region’s hot, humid summers and cold winters, homeowners living here would do well to choose windows that have an SHGC rating of less than 0.30 since they’ll be more beneficial.

Make the Most of Your Window Upgrade

Renewal by Andersen® of Long Island remains the leading choice for top-tier window replacement services. We also specialize in sliding contemporary and hinged French doors installation. Look no further for high-quality options and superior workmanship that you’d be happy to refer to a friend. Call us today at (631) 843-1713 or fill out this contact form to schedule your window evaluation. We proudly serve Farmingdale, NY, and the rest of the Long Island area. We’d love to hear from you!


"I was very impressed with Renewal by Andersen. They showed up in time and we received several follow up phone calls as the installation was being done as well as the sales representative stopping by to check in on the installation. The delivery/ installer was very professional. I would highly recommend Renewal By Andersen."

February, 18

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