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Relevance of window performance ratings
Living in an energy-efficient home lets you enjoy the comfort and reduced energy costs. An efficient way of realizing this kind of home is by replacing your old and drafty windows with energy-efficient ones. Look for windows that come with the National Fenestration Rating Council (NFRC) seal, which indicates good energy efficiency.


The NFRC is a non-profit organization that helps reassure consumers that they are getting an energy-efficient product. They test, certify, and label various fenestration products, such as windows, doors, and skylights, under this program. While an NFRC label does not mean a recommendation, it will tell you if a window replacement in Columbia, SC, or the local area, will perform according to your expectations.

NFRC Ratings

When shopping for energy-efficient windows in Greenville, SC, or the local area, it is essential that you have an understanding of what the numbers mean.

  • U-Factor – This measures the heat from inside your home that can escape. The lower the number, the better your window is at keeping heat trapped inside.
  • Solar Heat Gain Coefficient (SHGC) – This can be a number between zero and one. The lower the number, the better your window is at reducing solar heat gain, which is essential during summer.
  • Visible Transmittance (VT) – This measures the amount of light that enters your home. The higher the number, the better your window is in letting natural light in.
  • Air Leakage – This measures the amount of air that enters your home. The lower the number, the better your window is at preventing drafts.
NFRC Seal Benefits

We offer replacement windows in Lexington SC, and the local areas, that come with the NFRC seal. This means that you will be getting windows that feature insulating properties that will help increase your home’s comfort levels. We combine advanced materials with modern manufacturing techniques to make our windows energy-efficient. This will keep you from overworking your HVAC units, reducing your energy costs. Furthermore, they are made of low-maintenance frames that will preserve their beauty and function for a long time.

Trust Carolina Gutter Helmet and More to provide you with energy-efficient products that feature the NFRC seal. Call us today for your window replacement needs.