Portable air conditioners are practical to have especially if you are the type who moves around a lot or go on extended vacations to warm and sunny places. It is also handy to have a spare portable air conditioning unit at home that you can use in any part of the house that needs cooling. You can transport it from the guest room to the patio. It can be used indoors or in a shaded outdoor terrace. When summer gets too hot, you can even use a portable cooling unit to supplement your regular centralized cooling system.