Single hose portable air conditioners blow the conditioned room air over the hot condenser and then blow it outside. thus, air gets sucked into the room from the rest of your house. and then hot air from outside is sucked into your house. They don’t dehumidify at all and they just cycle hot air through your house.
the twin-hose ones, which seem to be only available online and at midsize capacities and up, are supposed to be much better as they suck outside air in, blow it over the condenser, and then back outside. meanwhile your room air is conditioned inside your room.
