When shopping for energy-efficient windows, make sure you understand their energy performances ratings. These are essential in selecting which window units are a perfect fit for your home and for the region where you live. Today’s blog focuses on one of the most important ratings to look out for, which is the solar heat gain coefficient (SHGC).
What Is the SHGC?
The SHGC is an energy performance rating that refers to the ratio of solar radiation passing through the whole window assembly composed of the glazing, window frame and spacers separating the glass panes. It ranges between 0 and 1, with the latter indicating the maximum amount of solar heat allowed.
Why Consider the SHGC Rating?
Knowing how windows behave relative to sunlight and solar heat allows you to choose the most appropriate units for your home, which often depends on the local climate. For instance, windows that allow for a larger amount of solar heat to pass through work well in regions where extra warmth coming from the sun is deemed beneficial.
What’s the Best SHGC Rating for Your Windows?
Discussing the matter of energy performance with your windows installer helps determine the exact SHGC rating for the replacement windows you are going to purchase. Generally speaking, however, an SHGC rating of less than 0.40 is recommended, especially in the Midwest where both heating and cooling are required.
Other factors to consider when determining the most favorable SHGC ratings for your replacement windows include your home’s orientation and external shading. There are other energy performance ratings you should also consider, including the U-factor, air leakage and visible transmittance.
At Renewal by Andersen® of Southwest Missouri, we offer high-quality ENERGY STAR® windows that help slash your energy bills. With features like High-Performance™ Low-E4® glass and Fibrex® framing material, you can enjoy consistent indoor comfort while saving on energy. Call (417) 268-9301, or fill out our contact form to schedule a free consultation.