A/C are heat pumps. They pump inside heat to the outside, and any modern A/C that isn't a mobile unit can also reverse its mode of operation and pump heat from

A/C are heat pumps. They pump inside heat to the outside, and any modern A/C that isn't a mobile unit can also reverse its mode of operation and pump heat from outside to inside. Heat, not air, you still need to maintain an healthy air balance inside (CO2, humidity).