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​All LiteZone® insulating glass units have a 25 year warranty.

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LiteZone Glass Inc. provides a 25 year limited manufacturer's warranty on all LiteZone® insulating glass units. In the event a LiteZone® insulating glass unit fails within 25 years of its manufacture date, LiteZone Glass Inc. will provide a replacement glass unit.
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The warranty includes protection against, among other things, seal failures, deterioration in the condition of the suspended films, accumulation of moisture within the glass unit, and against any appreciable deterioration in the thermal performance of the glass unit.
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