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There is the idea that the way to fight against heat is to add air conditioning to every single building. This would be true, if we were in Dubai and the temperature never went below 20°c at night, but in Europe it very often does. This means that a mosquito net is more interesting than air conditioning, and far cheaper.

Air conditioning is great when you deal with heat for weeks or months, without the opportunity to get rid of that heat at night. In Europe, nights are usually cool enough to lower the temperature inside buildings. As I write this I have the balcony door opened fully, trying to vent residual heat from this Minergie building.