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InnovativE®

Your Invisible Barrier

When you consider energy efficiency, perhaps the most critical part of any window is the insulating glass system. It only makes sense: the glass has the largest surface area.

Windows Can Help

To understand how windows can help, you must first understand that energy is lost through windows in three major ways: conduction, convection and radiation.

Conduction

The framing of all Windgate windows is made from vinyl, a natural insulator. To prevent energy loss through conduction, all insulated glass units utilize Duralite© “warm edge” technology. Using a low-conductance spacer, this method assures maximum resistance to energy flow.

Convection

Energy can also be lost through natural convection currents that can form within the insulating glass. That’s why Hawthorne® glass is 3/4″ thick, shown by government testing to be the optimum dimension to prevent these convection currents.

Radiation

Radiation occurs when long wave heat energy moves toward cold areas.

The most effective barrier to radiation is an optimal special Low “E” coating, a standard part of our InnovativE® glass.

This special coating actually reflects the long wave radiation back to its source.

This is important to understand, as radiation affects energy consumption, no matter what part of the country you call home.

Solar Gain vs. Heat Loss

The concerns of home owners in the North are quite different than those in the South.

In the North,where heating is a concern, glass must allow maximum solar gain, while preventing heat loss.

NFRC Ratings with Low E and Argon-Gas Fill

Product Series Operating Style U-Value w/ Low-E & Argon Gas Solar Heat Gain Coefficient Visible* Light Transmission
Hawthorne Double Hung 0.27 0.28 0.53
Hawthorne Double Horizontal Slider 0.27 0.28 0.54
Hawthorne Casement/Awning 0.27 0.27 0.51
Hawthorne Picture Window 0.27 0.30 0.57

*Architectural drawings and structural tests/ratings available upon request

Triple Insulated Glass (TIG) Ratings

Product Series Operating Style U-Value w/ Low-E & Argon Gas Solar Heat Gain Coefficient Visible* Light Transmission
Hawthorne Double Hung 0.24 0.24 0.42
Hawthorne Casement/Awning 0.23 0.23 0.40
Hawthorne Picture Window 0.24 0.26 0.45

*Architectural drawings and structural tests/ratings available upon request

  • Trim-n-Time®

    A revolutionary jamb extension & casing system!

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  • Industry's best warranty.

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  • Performance Values

    U-Value, Solar Heat Gain Coefficient, Visible Light Transmission, and Air Infiltration ratings.

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  • A variety of color options!

    A wide range of interior, exterior and woodgrain options. Learn more.

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Midway Industries, Windows, Chicago, IL