If your HVAC system has seen the better part of a decade, it may be time to consider replacing the unit. Most systems are about 12 years old when replaced. It really depends on the usage and maintenance of the unit. Annual tune-ups can extend the life of your system.
Technologies have advanced and there are many energy-efficient systems on the market now. Consider purchasing a unit with the ENERGY STAR label, as these highly efficient systems can save ~20% on your utlilities.
We recommend the following units: