Earlier quoted context omitted.
The legal temperature limit for what? For paid accommodation, for hotels? What is that limit; what law is it in?
It's Germany, livable space has to be at least 20 degrees Celsius(68F). He has summer blankets in the room with spare blankets and tries to charge 1.5 Euro per extra blanket.
Do you get to demand 20degC at work?
20degC is a bit hot for my liking, 18 degC as a minimum, perhaps - one should expect to wear a jumper in Winter.