A:Answer Hi A123, thanks for reaching out! When using the air conditioner, the unit will pull air from the room, filter it, and will blow cool air back into the room. Any heat from the unit is then exhausted through the back and to the outdoors. If you have more questions about the function or settings of this unit, we would recommend taking a look at the Owner's Manual. If you have other questions, feel free to let us know. Stay safe. -Michael