Scandinavians do panoramic windows and are freezing?

I'm sure many of you have seen hundreds of times on the internet pictures of Norwegian, and Swedish of Finnish homes and apartments. The most unusual thing that catches your eye - this is no meager interior and panoramic windows.

How did the inhabitants of the north are not afraid to make such huge windows give off heat outside?

Take a look at this picture:

Huge windows in the entire floor should give the street a lot of heat, making the maintenance of the house expensive. So we are used to thinking in Russia, where the quality of production and installation of windows during the day with fire will not find.

But if you look closely Norwegian to the window frame, It becomes clear why the house still warm. Pay attention to the selection:

Note:
in the photo - a double double-glass, and the gap between the chambers reaches 8-10 centimeters, which, moreover, sealed and filled with an inert gas impermeable cold.

To fill the cavities using inert gases argon or krypton.

Double-glass consists of three panes and two chambers, limited by them. In the same window of glass as much as two.

Now it becomes clear why the house cools down due to the huge panoramic windows.

Moreover, coming through the windows solar radiation heats the house on sunny days.

That's the northern adaptability and practicality in house building!