Regarding the price, we work with daily prices. For a certain product, we have several suppliers, which is why a price difference can arise.

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.

Yes it fits, I have also used it

No. The unit can circulate (= clean via the air filter), dehumidify and cool. Of course, you can set up these units outside and pipe the warm exhaust air into the house, but that makes no sense whatsoever in terms of energy.