Rules for air conditioning
Many people want cool air in summer. Split units are very good. But they are hard to build in flats. You need the permission of all neighbors. One neighbor can stop the work. Your landlord must also say yes.
You need permission for the work. Otherwise, you get a lawsuit. There are new rules in Steiermark soon. You only need to report the work then. You still need proof for the noise. New buildings lack air conditioning because of high costs.
Simple help against heat
Shops sell air conditioning for rooms now. These machines cool and heat the air. You can control them with your phone. You can also use simple tricks.
A wet towel at the window helps. Water makes the air cool. The towel must not be too wet. Then the air feels sticky. In hotels, put a towel at the door. This keeps the cool air in the room.