Understanding Visible Transmittance for Replacement Windows: The Importance of a Higher Score and How This Affects Your Home

Understanding Visible Transmittance for Replacement Windows

One of the major performance rating categories listed on an NFRC label is Visible Transmittance (VT). This category measures how well a window is designed to let daylight into a home. The rating score for visible transmittance ranges from zero to one, and most homeowners look for a higher number because this means that their homes will get more natural light.

To give some perspective, think about a tinted window in a car. This kind of window might have a visible transmittance score of 0.1 or lower, whereas crystal-clear, uncoated glass might have a visible transmittance score of as high as 0.9. Most of the energy-efficient replacement windows that are manufactured nowadays have a visible transmittance score of between 0.5 and 0.7—enough to let plenty of sunlight into your home, but not so much that it bleaches the fabric on your furniture and drapes and makes your home overly hot.

Sunrise Windows offers a wide selection of glazing options for their replacement windows so you can choose the level of visible transmittance that is right for you. In addition to gas-filled dual pane glazing systems, we also offer colored and patterned glass options so you can design windows that reflect your personal tastes. All of the glass packages in our replacement windows meet or exceed ENERGY STAR standards and will provide you with the utmost comfort and energy efficiency while allowing your desired amount of sunlight to filter into your home.

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For more information about how a replacement window’s visible transmittance rating can affect your home’s energy performance, click here to locate a Sunrise Windows dealer in your area.

Why Choose Sunrise?
When innovation meets artistry, great things happen

We take a great deal of pride in the quality of our products and the workmanship that goes into them. Our windows won’t just give you an amazing view—they’ll enhance the way you see the world around you.

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From using responsibly sourced materials to recycling vinyl and aluminum scrap created by our manufacturing process, we’re constantly on the lookout for ways to make our products and processes as sustainable as possible.

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Sunrise windows are expertly engineered and meticulously crafted to provide many years of reliable performance. However, if any part of your new windows does not live up to our quality standards, we’ll be happy to replace it.

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A company that honors their warranty! I had their windows since 1996 and the company still honors my warranty. Great windows. Great company. Thank you Sunrise!

Chicago, IL

I had Sunrise Windows installed in my home in 2000. We started noticing some of the wood lament on the windows started peeling. Sixteen years later, Sunrise honored their warranty and replaced every window. This is a stand-up company.

Temperance, MI

Installed 30 replacement windows and 2 sliding glass doors in Raleigh, NC. No leaks, no condensation, nearly perfect inside and out. Some windows were larger than 5x5 and still no problems. No more drafts and lower hvac costs. Real quality. Check with experts who engineer glass, as I did. They look great and visitors actually notice and comment. Just a happy customer. Nice job guys!

Raleigh, NC

As a window salesman who can sell Pella, Marvin, and Andersen windows as well, I can say with confidence that the Sunrise Window is a better option than any of those window brands. Most of the negative reviews I have read about the Sunrise product, is because the homeowner is uneducated on how condensation works, or the fault of the installer. If Sunrise makes a mistake, they will always fix it. Best window company to deal with and best warranty out there.

I purchased Sunrise Windows last year for a house I was flipping. I believe the windows were a big reason the house sold for nearly 100% of the asking price. This is a great company. I would recommend this company's products to anyone.

Toledo, OH

I had ALL my windows and both doors replaced at the same time to my older (built in 1958) home by the folks at Sunrise and am very satisfied with the selection, service and installation! I’d recommend Sunrise to anyone renovating their older home.