EuroLite NFRC Certifications

The National Fenestration Rating Council logo

All EuroLite doors and windows have NFRC certification - the highest certification requirements in the world. We also have the famous 'Energy Star' rating that qualifies homes for local, state and federal rebates and other financial incentives.

The National Fenestration Rating Council (NFRC) Energy Star rating ensures that doors and windows meet the highest energy efficiency standards. The NFRC certifies the U-Factor, Solar Heat Gain Coefficient (SHGC), Visible Light Transmittance (VT), Condensation Resistance (CR) and Air Leakage. This allows buyers to compare the insulation properties of doors and windows. EuroLite doors and windows can achieve the lowest U-Factor of any steel and glass fenestration products - as low as 0.18.

The NFRC also confers Energy Star ratings for each of the four climate zones in the USA. These charts show the required performance needed for Energy Star in your area.

U-factor measures how much heat loss occurs through a window or door and is probably the most important figure to use for comparisons. The lower the U-Factor, the less heat is allowed to escape, which means better insulation and lower energy bills. U-factor values generally range from 0.25 to 1.25 and are measured in Btu/h•ft²•°F .

SHGC is short for solar heat gain coefficient, a number that represents the amount of solar radiation through a window. It's measured between 0 and 1; a lower number means less solar heat transfer.

VT is short for visible light transmittance, the higher the VT, the more light is transmitted. A high VT is desirable to maximize daylight. Select windows with a higher VT to maximize daylight and view. While VT theoretically varies between 0 and 1, most values among double- and triple-pane windows are between 0.30 and 0.70.

CRF is short for condensation resistance factor, which is determined by measuring a windows interior surface temperature at each of the following indoor relative humidity levels 30%, 50% and 70%. CRF’s typically run between 30- 80, again with higher numbers being better.

Condensation between two panes of glass is usually caused by a defect in the seals that hold the insulating gas between the window panes, or improper installation. If you’ve purchased new windows, such a defect is usually noticed right away and would be covered under the company’s warranty. To prevent such defects from happening, the NFRC establishes standards of 'Condensation Resistance’ that ascertain how well a window resists the formation of condensation on the inside surface of the glass. All EuroLite windows have specially designed, integral seals that are engineered to prevent condensation for the lifetime of your windows. EuroLite dual pane steel windows exceed the NFRC 500 standards for condensation resistance.

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Current Certification Status