Here are some advantages and disadvantages of portable and ductless air conditioners.
Portable air conditioners
The main advantage for portable air conditioner is that they can be transported almost anywhere. They are used to cool the air in small apartments and rooms.
Ductless air conditioners
These systems do not have a duct system to regulate temperature. They usually are made from two units, one installed outside and one inside, usually on the wall. They are complex systems and they can be very expensive and also use more energy. But this is why they should be used for bigger areas, like offices and restaurants.