I've seen this suggested here a few days ago
now that I'm melting from the heat as a euro rentoid I am seriously considering it
the issue I have is that my window doesn't open enough to make the outside unit pass through, and I don't think they'll let me put anything on the service balcony (don't have access to it)
however
>main room and bathroom have air vents
>bathroom usually colder than main room
>put portasplit between main and bathroom
would this work?