If your split system air conditioner is more than 10 years old, it’s probably worth considering a replacement. Air conditioner technology has improved significantly in the last decade, with today’s inverter air conditioners up to 70% more efficient than an older unit. That’s right – you could run a new air con more than three times as long as your old one for the same cost. For the average home, A new split system air conditioner will pay for itself in less than a year; from then on, it’s savings all the way.