Quote:
Originally Posted by BigAls87Z28
there is an inert gas sandwiched between the glass
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Not necessarily inert. People like to throw that word around a lot,
usually just a gas without moisture dissolved in it will work, like boil off nitrogen from a liquid storage tank. Regular "air" has too much water in it. Actually a vacuum is better for insulating but more difficult to keep in applications such as these.
BTW I think there is only one or two truly inert gasses, IIRC argon is one of them, I think the window companies like to use nitrogen because it is much cheaper