Glazing Options


A. Dual insulated, both lites Clear, DuraLite® Spacer-Lowest Insulating Value

B. Dual insulated Cardinal 270 LoE²-2 layers of LoE Coating (side 2) with argon fill, DuraLite® Spacer -Twice the Insulating Value of Clear

C. Dual Insulated Cardinal 366 LoE³-3 layers of LoE Coating (side 2) with argon fill, with Neat® glass, DuraLite® Spacer

The data shows that the overall U-factor and in turn heat loss are significantly reduced with Cardinal LoE² and LoE³ products over clear IG units.

The Hawthorne Patio Door: Efficient

Dual Glazed 366 Glass Triple Glazed 366 Glass
U Value 0.27 0.26 0.17 0.16
Solar Heat Gain Coefficient (SHGC) 0.32 0.21 0.28 0.19
Air Infiltration 0.09 0.09 0.09 0.09

The InnovativE® Glass Package comes standard with double strength glass, Low E coating, Duralite® spacer and argon gas fill.

Triple glazed doors will have a U-channel steel spacer.

  • Hawthorne Patio Doors

    A high performance door available in two, three and four panel configurations.

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  • Industry's best warranty.

    View and download our warranty information today to learn more.

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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