Can you use a window air conditioner not in a window?
Can you use a window air conditioner inside a room?
Can I use a window air conditioner through the wall?
Can a portable air conditioner be used without a window?
They also both require ventilation in order to work properly. The big advantage with a portable air conditioner over a window AC unit is the fact you can use it in rooms with or without windows. It is also easier to move from room to room if you have a window and a vent kit.