Portable A/C units are used for cooling down small rooms with poor air circulation. These air conditioners are preferable to central air conditioners in many cases, particularly the ones where the existing ductwork is not in good condition. I will find more details on https://www.nyrentownsell.com/blog/apartment-air-conditioner/ now. Portable air conditioners are installed either by a window or by a wall outlet, and can be moved from room to room, depending on necessity.