Understanding Glass Performance

NFRC label sampleThe National Fenestration Rating Council (NFRC), a nonprofit organization, has defined labeling requirements for windows and doors. This information is provided to help you choose the best product for your home. Under the program, products are independently tested, certified and labeled, so you can be confident they will perform the way they are advertised. And as you will see, the ENERGY STAR program uses U-Factor, Solar Heat Gain Coefficient and Air Leakage to qualify products for certification.

U-Factor

Measures how well the window prevents heat from entering or escaping the home. Ratings generally fall between 0.2 and 1.25. Windows with a lower U-Factor provide better insulation. U-Factor is important wherever you live, but is a primary concern for homes in colder Northern climates.

 

Solar Heat Gain Coefficient (SHGC)

Measures how much heat from the sun is blocked. This number can range from 0 to 1 where windows with lower numbers reflect more heat. This is particularly important during the summer in hot Southern climates.

 

Visible Transmittance (VT)

Measures how much light comes through the whole window. Ranging from 0 to 1, windows with higher numbers allow more light into the home.

 

Air Leakage

Measures how much outside air comes into the home through a closed window. Rates typically fall in a range between 0.1 and 0.3*. The lower the air leakage number, the lower the potential for draft through the window.

 

Condensation Resistance (CR)

Measures how well the window resists the formation of condensation on the inside of the window. CR is expressed as a number between 1 and 100. The higher the number, the better the window is able to resist condensation.

 

Energy Rating (ER – Canada Only)

Measures the overall energy performance of a window. The Energy Rating is based on the combination of Air LeakageU-Factor and Solar Heat Gain. The higher the ER number, the better the product’s overall energy performance.

 

*As of January 1, 2015, the lowest allowable rating for Air Leakage on the NFRC label for windows and sliding doors is ≤0.3. Sunrise Windows are designed and manufactured to deliver superior air leakage performance. Actual ratings as tested are provided by window type on the following pages.

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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

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

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.

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.