While you might think that air conditioning systems “cool the air,” in actuality ACs remove heat from the indoor air, a feat accomplished primarily by the system’s evaporator coils. Located inside an HVAC system’s air handler, refrigerant in the evaporator coils absorbs heat and humidity from the inside air passing over it. The blower motor then helps push the remaining cooler air back through the interior in an ongoing circulation of the conditioned air. Meanwhile, the heated refrigerant in the evaporator coils is constantly circulated out to the condensing unit’s condenser coils outside of the house, where the heat is released as the cycle continues. This process is essentially reversed in heat pump systems.