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Window Glass Information

Who says you canít do anything about the weather? Cardinal LowE2-272glass (pronounced low E squared 272) delivers year-round comfort, whether itís 20 below or 110 in the shade.

In winter, LowE2-272 reflects heat back into the room. In summer, it rejects the sunís heat and damaging UV rays. Not only is it the clearest, highest performing glass you can buy, thereís no haze or bluish cast.

During cold weather, the insulating effect of your windows has a direct impact on how your rooms feel. Typically, 75% of the exposed surface of a window is glass, and the temperature of the room-side of the glass directly affects the air temperature in the room. The better insulated the window glass, the warmer your room will be.

In fact, the Efficient Windows Collaborative ( suggests that when glass surface temperature falls below 52įF, there is a risk of thermal discomfort. To maintain the best comfort during the winter, select a glass product that produces surface temperatures that will stay above this point during the coldest outdoor conditions.

For more detailed information, please consult our Glass Information Brochure. Also, feel free to browse our vendors website, Cardinal Glass.

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