Schedule a Free Consultation

ENERGY PERFORMANCE RATINGS: READING THE NFRC LABEL

When choosing replacement windows, the small National Fenestration Rating Council (NFRC) label contains a big message to help you make an informed decision. You should know how to read it properly to determine the most suitable ENERGY STAR®-approved units for your home.

Energy Performance Ratings Reading The Nfrc Label

In today’s post, Renewal by Andersen® of St. Louis talks more about the ratings on the NFRC label:

U-Factor

This measures how well energy-efficient windows prevent heat from transferring from the inside of the room to the outside. Expressed in a range between 0.20 and 1.20, the lower the value, the better the unit is at insulating thermal energy.

Solar Heat Gain Coefficient (SHGC)

This measures how much solar radiation the unit allows inside. Expressed in a range of 0 to 1, the lower the value, the better the window is at reflecting the sun’s infrared light.

All windows installation experts agree that every climate zone demands a unique combination of U-factor and SHGC. In St. Charles County, the maximum U-factor and SHGC ratings every window must have are 0.30 and 0.40, respectively.

Visible Transmittance (VT)

This measures how much daylighting the window provides. Expressed in a range between 0 and 1, the higher the VT value, the more sunshine it allows to pass through the glass.

Air Leakage

This measures how well the window prevents air infiltration. Expressed in a range of 0.1 to 0.3, the lower the number, the less drafty it is. By and large, casement windows are the most leak-resistant of all operating units because their sash presses against the frame when closed.

Condensation Resistance

This measures how much moisture the window allows to accumulate on its surface. Expressed in a range between 0 and 100, the lower the value, the less condensation you’ll see. While this rating is generally optional, it’s imperative to keep it in mind when choosing your new windows.

Renewal by Andersen of St. Louis windows have the best combination of ratings to meet and exceed ENERGY STAR’s standards. Call us at (314) 310-3636 to schedule your consultation, learn more our high-performance products and receive a FREE estimate. We serve St. Charles and other Missouri communities.

Reviews

"This was one of the best experiences I've ever had with a company. I ordered the windows in November and was told they wouldn't be here until July. That kind of delay the new norm so I wasn't a bit upset with the timeline. I was given an early present when they called to say the windows would be in at the beginning of May. We agreed on the week of May 16th to do the installation, there were 30 windows and a sliding door to install. They arrived promptly on their scheduled install date, and got straight to work. By the end of day one, they had all the upstairs windows complete and their work was incredible. Day two came with more of the same, the crew showed up promptly, got straight to work, and when they left they had every window downstairs installed. The third day they again arrived on-time, and got to work installing the door. The door and windows are perfectly installed. The two lads that did the installation did a phenomenal job, and were friendly to boot. I would give them more business if I had any :) The service I received from the company was great. They kept me abreast of anything that was going on with my order. I appreciate my concierge, Christina, she was good at communicating timelines and getting everything scheduled."

Lane Maxwell
Jun 28, 2022

"The two installers were great! They were polite and hard working and they cleaned up all the outside and inside. It was like they were never here. As for the windows, I love them, not only looks great, they are efficient. Now every window in my home has Renewal by Anderson."

Mark Palsgrove
Jun 23, 2022

"We had the pleasure recently of having Andersen replace all of our windows. From the very first interaction with the office personnel through the completion of the project, they have been nothing but professional. From Brian our sales rep to Christina the appointment scheduler, they were a pleasure to interact with. Installers Keith, John, and Evan were fantastic to work with. They went above and beyond to repair an area which was slightly damaged during the removal of a window...caulked and painted it. They took extra precaution to ensure the floors were covered while working inside and cleaned up each day inside and out. We love the look of our new windows and can't wait to enjoy the savings in utilities they'll provide. Thanks so much Renewal by Andersen!!"

Kevin Corrigan
Jun 15, 2022

View All Reviews