Where will the air conditioner be drawing its excess air from, in the one-hose case? if it’s indoors but outside the bedroom, what are your assumptions about the temperature there?
I plan to open the outside door and window in the apartment’s main room and air it out beforehand, so any infiltration should be outdoor-temperature air. (So e.g. if the neighbor is running an AC, I shouldn’t suck in their cool air.)
Where will the air conditioner be drawing its excess air from, in the one-hose case? if it’s indoors but outside the bedroom, what are your assumptions about the temperature there?