How long does freon last in a residentialcentral air conditioning system?

Freon, or refrigerant, in a residential central air conditioning system can last for many years, typically as long as the system is functioning properly and is not leaking. Under normal conditions, the refrigerant should not need to be replaced. However, if there is a leak or the system is not cooling effectively, it may require a recharge or replacement of the refrigerant. Regular maintenance can help ensure the longevity of the refrigerant and the overall efficiency of the system.