They are available in several powers depending on the type.
Regarding the latter, the individual air conditioning systems may nevertheless be limited to a single annual visit if he cleans regularly (once per quarter), its filters and verifies that the outdoor unit is not blocked by leaves or other objects. The devices that are reversible are fabulous. In addition, they heat a house perfectly, and that in less than an hour. Maintaining the filters is very easy: you just have to vacuum clean, and then you can use clean water.