The air conditioner is in the flat. I had a hole made by a professional, although it was a bit expensive. You have to drain the condensation when it's full. The condensation does not evaporate into the colder air. I did the realistic test once. Why is it so dry in winter? Never mind. You have to seal the bedroom, I have the air conditioner in the bedroom, very well. The air conditioner is not a split unit. They're better, but more expensive. Put a little cloth under the air conditioner and tilt it to the front where the lettering is. Then you have 10-12°C less. Do not set the air conditioner to the load limit. After that, you can lower the temperature further. Warmer air wants to get in from the outside. Observe physics. Greetings. Bye.