

OK, fair point. I was a bit naive. I was looking at it from an European standpoint. The nights are cool here and the houses are all made of bricks and very thick insulation. In those circumstances it is possible to trap the temperature. In my house the inside temperature is currently 22C/71F and outside 34C/93F. No AC needed.








I see portable ACs with a single hose as single room ACs. The room with the AC is cooling and pulling air from the rest of the house. That air is being replaced by outside air in those rooms.
But yeah, passive cooling is always good to do. Even with the best AC.
I have added a second hose to my portable single hose AC. Just a hose that is “hanging” against the input part of the AC so if there is negative pressure, the air will get sucked in directly into the AC.