humidity shouldnt be a problem with modern ventilation and such large cooling surfaces.
I'm honestly shocked how much of a fuss the participants are making over 22-26° rooms. My apartment is almost never below 25°, even in the winter. Are they somehow going to perform better if it's 20° and they freeze? Not to mention fucking loud portable air conditioners are. There's a heatwave going through Sweden right now, and my apartment was up to 30° this afternoon.
Also really defeats the point about not using air-conditioning when all the participants just bring in super-inefficient portable units and then immediately throw them in the trash. I guess it's good for energy efficiency in the long run though for when these buildings become normal apartments.
It’s all in what you’re used to. My house is never that warm, even in summer. I can sleep as warm as 22° in the summer, but always keep it below 20° in the winter.
So, yes, if I have to sleep where it’s 25° or 27° or warmer, I’m probably not sleeping well and we’ll all be happy I’m not an athlete
Condensation shouldn't be an issue as long as you're not cooling below the current dew point.
However, after experiencing one of these underfloor cooling systems once, I can say that the biggest issue is that cold air tends to be heavier and thus stay down. So in order to cool the entire room, not just the layer of air right above the floor, you need something to move the air, which is probably why they're providing fans. Either that or you can just lie on the floor all the time...
Floor heating works because warm air rises. I never understood why 'floor' cooling wasn't piped through the ceiling, instead. There are probably some engineering or heat transfer issues there, though.
Heating/cooling works better with a heat sink, such as concrete. Water is also heavy, so laying it on top of the floor is far easier than suspending it from the ceiling. Also, in many places you will want to both heat and cool, and running heating and cooling in different locations costs up to twice as much. The easiest solution is to move the air, so fans do just fine.
Don't think that's ever been a problem anywhere close to Paris climate. It's not that humid and it's not that hot. The difference between inside and outside climate is not that extreme.
And if humidity is a problem, you are dealing with mold, not actual wet floors. That is if the buildings are not well engineered and it would show in the long run, not during the gamee.