All the windows which we manufacture,offer and install are filled with 100% pure Argon gas which never contains any water vapor in the first place,unlike air which always does.We make sure that all our sealed in units a fully sealed from the outside elements by using a high quality sealant to seal the units, this also ensures no argon gas is leaked and no air creeps in. Argon gas does not react to the cold or the sunlight so mist and fog will never occur. Air filled doubled glazed units will eventually fail and become foggy and misty between the pane and when this happens they then will require routine maintenance to clear out the mist and fog . Condensation is what causes the mist and fog in air filled double and triple glazed windows it occurs when during the process when air sealed in the units reacts to the sunlight and expands and the then contracts in the heat.This process eventually break the seal around the windows allowing a water vapor filled air to enter.The water vapor air then condense leaving mist and fog. Also air filled double glazed and triple glazed sealed units expand in the summer and expand in the winter this what eventually causes the window seals to break causing the UPVC panels to look warped. Argon gas does not expand in direct sunlight and it does not react to the cold and contract. Unlike Air is why they will last for decades without the need for replacement and maintenance . Argon gas is 100% pure unlike Air with is a mixture containing water vapor,Oxygen and nitrogen.
Air filled windows will eventually fail and once they do they will require routine maintenance work.The procedure to remove mist and fog from lower quality air filled windows requires holes to be drilled into the windows!
Take a look below at the involved and messy process of clearing fog and mist form air filled windows.