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If you have ever tried to make sense of the energy labels on new windows, you know it can look a bit intimidating. What do all those letters and numbers really mean? Luckily you have come to the right source. These ratings are important if you want to find the best replacement windows in Highland Park, IL. So here is what you need to know about the NFRC ratings.
What is the NRFC Label?
In 1994 the National Fenestration Rating Council (NFRC) came up with a system to provide accurate and fair ratings for all exterior products. For windows and doors to receive an Energy Star label the must meet a specific standard set by the NFRC. That way homeowners and builders would know which products are the most energy efficient and will work best for the region.
This rating is for how well the window blocks non-solar heat transfer. It is also the inverse of the R-value, a measurement for the resistance to heat flow used for other products, like insulation. The ratings go from .20 to 1.20. The closer this rating is to zero, the better the insulation from outside in, and inside out.
- Solar Heat Gain Coefficient (SHGC)
This is another important measurement for energy efficiency. It is similar to the U-factor, except this one accounts for solar radiation, specifically heat transferred inside through the glass. You might notice that certain rooms in your home heat up during different parts of the day. This is because of radiation from the sun. The SHGC rating shows how well the window blocks this kind of heat. The measurement is between 0 and 1, and again, the closer to zero, the more your replacement windows block the heat.
- Air Leakage
This measurement references how much air is gained and lost through the small cracks in the window casings and assembly. The numbers fall between 0.1 and 0.3, and measures cubic feet per square foot. Lower ratings mean less air getting in and out. However, many manufactures do not post this measurement because it is not a requirement.
- Visible Transmittance
This number measures the amount of sunlight that makes it through the glass. If you enjoy a lot of natural light, then you will want to pay attention to this reference. The rating goes between 0 and 1, and if you want a higher potential for daylighting, look for a higher VT number.
- Condensation Resistance
Moisture buildup on the inside of your windows is a bad sign. So, with the condensation resistance measurement you want the highest number possible between 0 and 100.
- Low-E Coatings
Clear glass has an emissivity level of 0.84, and Low-E glass ranges from 0.35 to 0.05. So these ratings show the window transmits light, but reflects unwanted heat.
Call Scientific Home Services for the Best Replacement Windows
So now that you know what to look for, time to test your knowledge on some products. Call (847) 752-0370 or stop by 7240 Saint Louis Ave., Skokie, IL 60076. We will provide the best products on the market and find you the perfect replacement windows for Highland Park, IL and the surrounding area.