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    Double Pane Vs. Tempered Glass

    Tempered glass and double pane glass serve very different purposes because of their different qualities. Double pane glass is better suited for home windows because its insulation properties, due to the double layer of glass, make this glass more energy efficient and good for noise reduction. Tempered glass is more suitable for extreme conditions because it is more heat resistant than normal glass and it breaks into oval pieces which is much safer than glass shards.

    http://greentwindows.com/window-series/