What Does the NFRC Sticker Really Mean?

What Does the NFRC Sticker Really Mean?

May 14, 2018

If you’ve ever gone shopping for replacement windows or doors, you probably noticed a sticker with the NFRC logo in the top corner. NFRC stands for the National Fenestration Rating Council, which is a nonprofit group that independently tests and certifies windows, doors and skylights, then lists the energy performance ratings on a label, the same one that carries the NFRC logo. In this way, consumers are able to understand what they’re buying and have confidence in the products they’re purchasing.

The information listed on a NFRC label can be a little confusing, so here is an explanation from Renewal by Andersen of Northeast PA to help you understand a few of the different components of the NFRC rating system. Three in particular are also used for determining ENERGY STAR certification: Air Leakage, U-Factor and Solar Heat Gain Coefficient.


Air Leakage

This measurement, with a range of 0-1, determines how much outside air leaks inside your home via a closed window. This is an important number to keep an eye on; the lower the number, the less chance a draft is going to make it through the window.


A window’s U-factor is a measurement of how well it regulates the flow of heat into and out of the home. The range is .20-1.20, with lower numbers designating more energy-efficient products that will do well retaining the heat in your home in the winter.

Solar Heat Gain Coefficient

Solar Heat Gain Coefficient, with a range of 0-1, is a measure of how much heat from the sun is blocked. Lower numbers are better if you live in a Middle or Southern climate and want to spend less on your cooling bill in the summer. For those in Northern climates who want to let in more of the sun’s heat, choosing windows or replacement doors on the higher end of the range may be preferable.

The NFRC logo is something you will always see on Renewal by Andersen products. The combination of our exclusive Fibrex® material, High-Performance™ Low-E4® glass and expert installation means our replacement windows have excellent NFRC ratings. To find out more about our superior products, give Renewal by Andersen of Northeast PA a call at [company_phone].

Hear From Our Customers

From George, the salesman giving me a balance of wants and needs to Rosko and his team members doing a fantastic job on the window replacement and install. To the post inspection process and thank you package with additional information for cleaning and maintenance. All was great!

I cannot say any more then I have, everyone that came from Renewal by Anderson has been one of the best experiences I’ve had dealing with a company. A big thank you.

The entire team was excellent, professional, respectful, thoughtful, and was always attentive of our needs. They always asked questions before they started to make sure we were on the same page. We already noticed savings on our electricity. We are so happy we chose Renewal by Andersen.

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