Comment by sdeframond

> many Europeans seem to be confusing insulation with inertia

That is true. I heard that many times...

> during a strong heatwave there is no adaptation possible, AC is needed.

At some point, yes, obviously. But in many cases I see people installing an AC without actually trying anything else. And then it is an energy orgy: AC set to 16C with sunlight hitting straight to the middle of the room...