The worst thing young adults can do is go to graduate school because they aren't sure what else to do or they can't find jobs. Grad school, after all, is often an extremely long commitment. A Ph.D., for example, can take six years.
The average lifespan for an air conditioner is 10 to 15 years. Some air conditioners last up to 20 years. As interesting as these data points may be, they don't tell you the whole story. The issue is that a variety of factors affect the lifespan of an air conditioner.
In a northern state, the ac might be needed for only two to three months. This extra service time, understandably, can affect the life of the unit. Another major factor affecting how long air conditioners last is the amount of service and care that the system receives over the years.