Oh 20 celsius isn't that bad. That's like, room temperature, right? It's not unusual for it to hit 40-45°C in the summertime. And that's no exaggeration .-.
Holy crap! And I thought I liked a cold room! 10 is about my breaking point. That's what it got to in my house when the heater broke and it didn't get above freezing for a week. Yeah, that's when I had to make some phone calls xD