Exactly how long does refrigerant last in home AC?
If you're trying to figure out how long does refrigerant last in home AC systems, the first thing you need to know is that it's not like the gas in your car's tank. You don't "burn" refrigerant to stay cool, and you shouldn't have to top it off every few years just because it's getting old. In a perfect world, the refrigerant in your air conditioner should last as long as the unit itself—usually about 15 to 20 years. ...