Ah, the convenience of having air conditioning. How many of us have thanked the technology that gave so much comfort during the hot, muggy day.
This CNET article covers the basic physics of air conditioners. Any undergraduate student who had taken intro Physics course should know the basic physics of this device when studying thermodynamics and the Carnot cycle. This is essentially a heat pump, where heat is transferred from a cooler reservoir to a warmer reservoir.
But, if you have forgotten about this, or if you are not aware of the physics behind that thing that gives you such comfort, then you might want to read it.