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Written by Fred Daues on January 23, 2015 in Replacement Windows in St. Louis

Questions about window energy performance?

The National Fenestration Rating Council (NFRC) rates the energy performance of most windows, doors and skylights. If you have questions about window energy performance, you can use these ratings similar to the sticker rating miles per gallon on a car or truck to rate the particular efficiency of a window you are considering buying.

You can:

  1. Compare different widow manufacturers on a apples to apples basis
  2. Confirm that the performance you are being told by the contractor is accurate
  3. Gather information that can assist you on making a decision on a product that will be in your home for many decades

The NFRC is an independent entity and owes no allegiance to any manufacturer. That is why the federal government encourages homeowners to only consider windows rated by the NFRC.

One way to confirm the windows you have purchased have the same rating as what you contracted for is to look for the NFRC label. The label which is usually secured in a corner of the glass of the window you purchased. You can also go to www.windowratings.org where you can:

  1. Search the database to compare windows you are considering
  2. Answers to a lot of questions on NFRC
  3. Submit questions to independent experts at NFRC

The following is an example of an NFRC label and what the ratings mean and how to read the label. Click on the image below to view full document:


The Best Replacement Windows in St. Louis

Masonry & Glass Systems offers the best new replacement windows in St. Louis.
The best windows, at the best prices, with the best window company.

Call us Mon-Fri at 314-535-6515


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St. Louis Double Hung Windows from Masonry & Glass Systems

1. Stunning new Cove-Mould Face on exterior creates a detailed wood-look.

2. World Class robotic construction adds elegance while eliminating air leaks.

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4. Invisible tilt hardware system enables one-touch operation of the tilt-in feature.

Beauty, elegance, energy efficiency and easy function!  Four great reasons to invest in Soft Lite’s Restorations Windows by Masonry and Glass Systems! For more information on new replacement windows in St. Louis, visit our window site at www.mystlwindows.com