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Solar Heat Gain Coefficient: What It Is and How It Affects Homes

If your doors and windows are old and a bit worn-out, you might be considering replacing them. Making that decision is usually pretty straightforward, but deciding on what replacement windows and entry doors to install is a little more complicated.

Solar Heat Gain Coefficient What It Is And How It Affects Homes

There is a lot to think about, including the solar heat gain coefficient or SHGC of the units you want to get.

What is SHGC? Why Do You Have to Know About It?

The window and door installation industry uses SHGC to determine how much heat from the sun penetrates your home through doors and windows. Infrared rays from the sun can cause passive heating, and excessive heat can lead to not just discomfort for inhabitants but also cause premature deterioration in various materials in a home.

What Should You Look For?

SHGC ratings are usually provided on door and window labels for customer convenience. We recommend looking for products with low values if you want to make sure that your replacement units will help keep passive heating at bay. This will ease your home’s cooling requirements, making it easier for your HVAC system to achieve your desired indoor temperatures and keep you comfortable.

Are There SHGC Requirements in Your Area?

Yes, there are. In fact, ideal SHGC ratings will depend on the climate zone you are in. For instance, Texas requires that all windows, glazed patio doors and skylights have a maximum of 0.40 for climate zone 4 and a maximum of 0.25 for zones 2 and 3.

If you want to know more about SHGC or you are ready to find the best replacement doors and windows for your home, just give Renewal by Andersen of San Antonio a call at (210) 888-9680. Ask us for a quote today! We serve San Antonio and the surrounding communities in Texas.


"We were very pleased with the quality of the Anderson windows and the expert installation. This is our second window purchase from South West Exteriors."

Charles Korbell

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