One of the most important things that needs to be considered is the size of the unit itself. This is not only true of the physical size of the unit, as that is also something that needs to be taken into consideration but you need to make sure that it has enough power to take care of the job. Whether it is a free standing air conditioner or if it is one that cools the entire house, it is going to be rated by BTUs. This is a unit of measurement which shows you how much energy is output by the unit and it can help you to determine how large of a room you can keep cool. Some adjustment may need to be made if this is a secondary unit that has been used in a room that is not quite being kept cool enough to buy the regular house unit.
Something else that needs to be taken into consideration is exactly how portable one of these free standing air conditioners is going to be. Some of them will truly be free standing and will collect the water in a pan that will need to be emptied from time to time. Other units, on the other hand, will need to be attached to the window in order to vent the condensation. If you plan on moving the unit from room to room or do not have close proximity to a window, make sure that it is truly a free standing unit.
Having one of these free standing air conditioners in your home can be an excellent way to keep it a little cooler whenever it is warm outside. They are one of the most convenient ways of doing so, as well, and can easily be moved in most cases when one room in the home into another whenever there is a need.