What Is A Good SHGC Rating For Windows?

Whether you’re getting a sliding patio door, replacing windows and skylights, experts would always advise checking the solar heat gain coefficient (SHGC) ratings of the products you’re getting. This practice allows you to understand how much solar radiation can pass through your home features. Why is this important? Read further to find out.

Understanding SHGC Ratings

SHGC ratings of window products are determined by the National Fenestration Rating Council (NFRC) following the necessary tests they run. The U.S. Department of Energy and the EPA use the SHGC ratings in assessing the energy efficiency of the windows for product certifications and federal incentive and rebate programs. 

These classifications are used to guide people in choosing the right windows from window and door replacement services. Along with other information such as condensation resistance, visible transmittance, and U-factor, these are indicated on product labels so that people can easily refer to them and make comparisons of the different window items.

The Ideal Rating For Your Windows

Note that ratings vary per location. For southern climates that rely on cooling, windows should have an SHGC rating of less than 0.27. In the mixed climates of the south and central regions, windows and skylights should have an SHGC rating of less than 0.30. In the mixed climates of the north and midwest, the SHGC rating for windows and skylights should be below 0.40. On the other hand, in the colder climates of the north, a window’s SHGC rating is not as important as the U-factor. Moreover, if air conditioning is used from time to time, the SHGC rating of windows should be less than 0.40, if not, windows should have an SHGC rating of 0.30 to 0.60.

At Renewal by Andersen® of Rapid City, we believe all our clients deserve the very best, which is why we stand behind every replacement window and patio door we install. If you’re calling for French doors installation, do not hesitate to reach us at (605) 307-5574 or here. We serve clients in South Dakota, including Spearfish, SD.