It's not quite that hot here in Cologne, although I'm sure the difference is only between 2 and 5°C, but my flat is 18 m² and in my everything-room (kitchen, bed, desk) a PC labours all day, cooking the room air. I can't wait for next weekend when it will hopefully be cooler again and I'll be in my mother's spacious house.

I hate summer.
Luckily, things are supposed to cool down starting in the West.