No, air conditioning is not omnipotent, such as a little piece of the hanging air conditioning, at most suitable for twenty to twenty-five flat rooms, then a larger room, not no effect, but the effect is not obvious, if it is a small air conditioning, even if it is a vertical three-horse air conditioning, want it to play a role in a hundred flat space, it is unlikely, cooling and heating will not have an obvious effect.
I don't think it can. There's too much room
Can't, short-term nothing, long-term easy failure, at most 30 square
If it is a small central air conditioning is OK.
No, you need a standing air conditioner for 100 square meters