Why does adding a second pane of glass (double glazing) make such a huge difference, even if your walls etc are the same?
In: Physics
The windows are always the weak spot when it comes to thermal insulation, so the walls staying the same doesn’t matter [in regards to this question, that is – of course, insulation for walls is important as well].
With double glazing, you are trapping a layer of air (and sometimes even vacuum) between the two panes of glass, which helps slow down heat diffusion by quite a bit.
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