The keys to obtain a good portable air conditioner. Calculate between one hundred and 140 BTU per m2. One of its advantages is that it does not require a foundation. In addition, you can change rooms depending on where you need them. It must be placed attached to an opening, which is cooling inside the room, and expelling another part that is not refrigerated outside the house. How do portable air conditioners work? Its articulation is very simple: to suck the hot air from the field, which enters the device to twist some grooves. The hot air circulates inside the appliance and cools thanks to freezes that freeze inside. Subsequently, the air is expelled into the interior of the room and frosted. A part of the air, that does not cool, debit to be banished to the outside, for that reason, it is necessary to have it coupled to a window.