The Window Source of Upstate SC

906A South Broad St. Clinton, SC 29325

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864-923-5548

What is an NFRC Rating?

Each year, the average American household spends $1,500–2,500 on energy bills. 45% of that cost is for heating and cooling. Choosing high-performance windows, doors, and skylights can save you money and keep your home comfortable.

©2020 National Fenestration Rating Council

The NFRC Rating is an Energy Performance Label.

All Window Source products come with voluntary National Fenestration Rating Council (NFRC) labels so that you can compare window products with confidence. You can rely on the labels and forget about all the sales gimmicks that you may hear from companies charging much higher prices. In fact, the United States Environmental Protection Agency (EPA) relies on NFRC data to set its ENERGY STAR guidelines.

The National Fenestration Rating Council is committed to advancing the continuous improvement of windows, doors, and skylights, contributing to making buildings more comfortable and energy-efficient.

The displayed NFRC is based on the 9000 Series Double Hung Window and may vary on size, series, type, and options.

What does the NFRC Label Tell You?

The NFRC label indicates measurable elements of window energy efficiency performance such as U-Factor, Visible Transmittance, Solar Heat Gain Coefficient and

U-Factor measures how well a product can keep heat from escaping from the inside of a room. The lower the number, the better a product is at keeping heat in. 

Range: 0.20-1.20 Look for: Low numbers

Visible Transmittance measures how well a product is designed to effectively light your home with daylight, potentially saving you money on artificial lighting. The higher the number, the more natural light is let in. 

Range: 0-1 Look for: High numbers

Solar Heat Gain Coefficient measures how well a product can resist unwanted heat gain, which is especially important during summer cooling season. The lower the number, the less you’ll spend on cooling. 

Range: 0-1  Look for: Low numbers

Air Leakage measures how much air will enter a room through a product. The lower the number, the fewer drafts you’ll experience. 

Range:  ≤ 0.3  Look for: Low numbers

Call The Window Source of Upstate SC For A Free Estimate!

See What Our Customers Are Saying About Us

“The company to use if your needing window replacement, Fair pricing and honest fast work.”

Tom Reavis, GA

“Fantastic Company and true to their word! The crew was so professional and polite. We had our entire house of windows done and it only took 2 days. The quality of these windows are amazing and we couldn’t be happier! Don’t pay the high price that other companies want. This is the real deal!”

Jennifer Rochester, NH

“The Window Source of Tulsa was recommended to us. We received bids from three window replacement companies. Window source had the best product at the best price. The installation was on time and professional. We were kept informed through out the process. We are very pleased with the final product. About two weeks after the windows were installed I broke the outside pane of one window while mowing the yard. I contacted Window Source and told them what had happened, offering to pay for the replacement. They replaced the window free of charge. They are a pleasure to do business with.”

Alan McIntyre, OK

“Excellent service, product, and less than half the price of the other 2 estimates I had. Installer cleaned up after himself and was very professional.”

Ian Gollahon, OK

“Quality windows at an affordable price. Love our windows! Talked to several companies, but The Window Source offered top notch windows at the best price. Sales and installation crew were very nice, knowledgable and professional. They did a great job.”

M Kinser, OK