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Energy and Structural Performance Data

Thermo-Tech Premium Windows and Doors are thoroughly tested for structural and thermal performance according to the most widely recognized national standards, including the American Architectural Manufacturers Association (AAMA) window specifications. The numbers tell the story: every Thermo-Tech product is built for a lifetime of reliable, energy-saving performance.

When you're shopping, compare structural and thermal performance ratings. Look for the performance grade (PG), which measures the window’s resistance to wind and rain. The higher the PG rating, the better. And check out the National Fenestration Rating Council (NFRC) label for an accurate method to evaluate a product’s energy performance and to ensure the windows are Energy Star® compliant in your area. Thermo-Tech windows are Energy Star® rated in all four climate zones.

You also want to check the U-Factor and the Solar Heat Gain Coefficient (SHGC) of the window. U-Factor is a measure of how well a window keeps heat inside a home or building in the winter. The lower the U-Factor, the greater the window's insulating value. SHGC measures how well a window blocks heat caused by sunlight. The lower the window’s SHGC, the less solar heat allowed into the home by the window.

Trust Thermo-Tech for beautiful, energy-efficient windows and doors that measure up to your expectations—and beyond.

Light, Ventilation and Egress

To simplify your planning process, we show the light, ventilation and egress calculations for our standard sizes. Always verify egress requirements with your local building inspector. For more detailed information about Thermo-Tech windows, contact your Thermo-Tech sales representative.

View our Thermo-Tech light, ventilation and egress window data. (PDF 436KB)

Check Out The Performance Data
On Our Popular Window Line


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Available in several Classic Series
and ThermoFit windows styles.


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