FAQ

This may be due to cold drafts. Cold drafts occur when air is cooled by a window. The cooled air is heavier than air in the rest of the room...

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Fogging may occur on the outside of the glass. Common causes are: The relative humidity of the location. The higher the humidity, the greater the risk of condensation/fogging...

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Fogging may occur on the inside (room side) of the glass. Common causes are: Poor ventilation, poorly insulated panel...

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The U value, or heat transfer coefficient, indicates how good the thermal insulation of a window is...

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