Understanding Windows Labels: National Fenestration Rating Council, Energy Star

These labels will help you evaluate which window to buy.


| March/April 2007


Three labels can help you evaluate which window to buy.

1. The National Fenestration Rating Council (NFRC) label isn’t required on all new windows, but it’s valuable for determining which ones are best for your conditions. Through independent testing, the council rates windows for the factors below. Results are available at http://CPD.NFRC.org/pubsearch/psMain.asp.

• U-Factor: Measures how well the window prevents heat from escaping. The lower the number, the better the window insulates.
• Solar Heat Gain Coefficient: Measures how well the window blocks the sun. The lower the number, the less heat.
• Visible Transmittance: Measures how much light comes through. The higher the number, the more light.
• Air Leakage*: Indicated by the cubic feet of air passing through a square foot of window (cfm/sq ft). The lower the number, the less air will pass through cracks in the assembly.
• Condensation Resistance*: Measures resistance to condensation formation on the interior. The higher the number, the better the resistance.

* Not always included on NFRC label.

2. Energy Star, a U.S. government-sponsored energy-efficiency initiative, places its logo on NFRC-rated windows and doors that have optimal U-Factors and Solar Heat Gain Coefficients for each climate zone.

3. The Window Selection Tool at www.EfficientWindows.org can help you compare energy costs and savings between window types. It takes into consideration the regional location of the house, average public utility rates, window frame, Energy Star certification, and whether installation is in new construction or retrofitting. It also provides state-by- state fact sheets with recommended NFRC ratings for each region.





mother earth news fair 2018 schedule

MOTHER EARTH NEWS FAIR

Next: April 28-29, 2018
Asheville, NC

Sit in on dozens of practical workshops from the leading authorities on natural health, organic gardening, real food and more!

LEARN MORE



Subscribe today and save 58%

Subscribe to Mother Earth Living !

Mother Earth LivingWelcome to Mother Earth Living, the authority on green lifestyle and design. Each issue of Mother Earth Living features advice to create naturally healthy and nontoxic homes for yourself and your loved ones. With Mother Earth Living by your side, you’ll discover all the best and latest information you want on choosing natural remedies and practicing preventive medicine; cooking with a nutritious and whole-food focus; creating a nontoxic home; and gardening for food, wellness and enjoyment. Subscribe to Mother Earth Living today to get inspired on the art of living wisely and living well.

Save Money & a Few Trees!

Pay now with a credit card and take advantage of our earth-friendly automatic renewal savings plan. You’ll save an additional $5 and get six issues of Mother Earth Living for just $14.95! (Offer valid only in the U.S.)

Or, choose Bill Me and pay just $19.95.




Facebook Pinterest Instagram YouTube Twitter


Copyright 2018, All Rights Reserved
Ogden Publications, Inc., 1503 SW 42nd St., Topeka, Kansas 66609-1265