Yes, window air conditioners push air outside. Window air conditioners are designed to cool the indoor air by removing heat and humidity from the room. They do this by blowing indoor air over a set of cold evaporator coils, where the heat is absorbed, and the air is cooled. The cooled air is then blown back into the room, creating a comfortable environment.
At the same time, window air conditioners expel hot air and moisture outside the room through an exhaust system. The hot air is the result of the heat removed from the indoor air, and it needs to be vented to the outside to maintain the cooling process. The exhaust system typically consists of a vent or a set of vents at the back or sides of the unit.
For window air conditioners to work efficiently, it's essential to ensure that the exhaust vents are not obstructed. The hot air needs a clear path to be expelled outside the room. Some window air conditioners have extendable side panels to cover any gaps around the unit and provide a better seal, preventing warm air from coming back into the room.
To summarize, window air conditioners both cool the indoor air by pushing cold air back into the room and expel hot air and moisture outside to maintain the cooling process.