Eli5: what an “air gap” is in the context of storm windows and how/why it better insulates windows.

Question

PS: Is it still an “air gap” without using “noble gases” and just “air”? Thanks so much!

In: 31

Answer 1

Glass conducts heat well. Air conducts heat reasonably well. The junction between glass and air, however, does not.

So, we add two panes of glass, therefore doubling the number of junctions.

Noble gases and air do the same thing. Noble gases are supposed to be ‘better’. Argon’s standard iirc.