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Know Your Windows: Deciphering the Energy Label

Make Sure You Get Energy Efficient Windows

Energy efficient replacement windows are a very important necessity for eco-conscious Oklahoma City homeowners. Windows like the EnviroView line we carry at Community Builders of Oklahoma City are more than capable of meeting that necessity and then some. Their proven excellence in energy efficiency is evident in the fact that they carry the coveted blue Energy Star® label. This is a telltale sign that a product has met and surpassed government standards for energy efficient qualification. However, some homeowners want to dig deeper into a windows energy efficient specification. That’s why the NFRC label is present on all North American windows. This label provides detailed ratings for the four aspects of your window’s efficiency.

What Does it All Mean?

  • U-Factor: The U-Factor tells how well a window retains the heat in your home and its ability to protect against heat transfer. Ratings on the lower side of a range between .20 – 1.20 are ideal.
  • Solar Heat Gain Coefficient (SHGC): A window’s ability to block radiant heat generated by the sun is rated with the SHGC number. A lower SHGC number between 0 and 1 is better.
  • Air leakage: This tells you how much air can potentially leak through the hardware of the window. A lower number means there’s less potential for air leakage, which equals less energy loss. This is measured in a range of .1 to .3.
  • Visible Transmittance (VT): The potential for “daylighting” is indicated by the VT rating. “Daylighting” is the potential for illumination of the interior with natural lighting through the window. A higher number between 0 and 1 means that more natural lighting can get through.

Window Ratings Save You Grief & Money

Now that you have a bit more knowledge about the NFRC label and how to read it, you are that much closer to being a window expert capable of making the best decision for your home. At Community Builders of Oklahoma City, our window experts would also like to provide you with expert window knowledge and assistance with choosing the perfect replacement windows. Our professionals are readily available to help you learn more about energy efficiency and decide on the proper window style. Take advantage of our amazing window expertise and services in Oklahoma City by contacting us today to schedule your free consultation.

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