Question

some sort of special gas or air is filled in between the two glass panes in these windows. It is aimed at perfect insulation that is so advantageous."

Answer 1

Answer:

There might be two possible answers for this answer.

They are:

• See, if you remove the between the windowpanes, ie create a vaccum, you can insulate anything (just like a thermos). Quilts and blankets work on the same principle

• Or, you could fill the windowpanes with Argon gas (symbol Ar and atomic number 18).

{I don't really know how Argon gas works in insulation, so, you might have to search the net for it.}

P.S. while answering the second point I did a little research on www.bing.com