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SHGC and U-Value Ratings: Why They Matter

Today, homeowners can choose from a wide variety of window styles, colors and designs. But apart from appearance, it’s also important to look at the solar heat gain coefficient (SHGC) and U-value of windows. These ratings can affect your home’s energy efficiency, so you have to consider them when making a decision.

SHGC and U-Value

Continue reading to learn more about SHGC and U-value.

What Is SHGC?

SHGC reflects the amount of solar heat that passes through window glass and radiates into your home. It is measured between 0 and 1. A lower SHGC rating means the window glass absorbs less heat into the home. So if you live in an area that receives a lot of direct sunlight, you should get windows with a lower SHGC rating. These windows will prevent excessive heat from penetrating your windows, making it easier for your AC to cool your home. As a result, you can enjoy lower energy bills, especially during summer.

If you live in a cold region, you should consider windows with a higher SHGC rating. These windows allow more heat into the room, so your HVAC system will have an easier time heating the space.

Whether you choose double hung windows or casements, make sure their energy efficiency ratings are appropriate to your local climate.

What Is U-Value?

U-value measures the insulative capabilities of window glass. It refers to the rate windows can transfer nonsolar heat. U-value can go from 0.20 to 1.20. A lower U-value means the window transfers less heat and has better insulative capability, which is crucial in keeping the heat out in summer and the cold out in winter. Generally, you should opt for windows with good insulation, so you can maintain indoor comfort and benefit from energy savings year-round.

For high-quality replacement windows, you can always count on Renewal by Andersen® of Long Island. Our professional team with decades of experience provides excellent window installation services too. Call us at (855) 728-1756 or fill out our contact form to get started.


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