Yes, most central air conditioning systems have the ability to recirculate air. Central air conditioners work by cooling the air and then distributing it throughout your home using a system of ducts. When the air is recirculated, it is pulled back into the system, cooled again, and then redistributed.
The recirculation process helps maintain a consistent temperature within your home and can be beneficial in several ways. It allows the air conditioner to continue cooling the air without drawing in additional outside air, which can be helpful in areas with high humidity or outdoor pollutants. It also helps improve energy efficiency since the system doesn't need to work as hard to cool down fresh, hot air from outside.
To enable the recirculation mode on your central air conditioner, you typically need to adjust the settings on your thermostat. The specific method may vary depending on the make and model of your system, so it's best to consult the user manual or contact a professional for guidance if you're unsure how to enable recirculation mode on your particular unit.