Various homeowners delay their decision to replace their aging heating and cooling equipment. They will often spend thousands of dollars maintaining an outdated, inefficient system as opposed to replacing it. The current lifespan of a typical HVAC system is about 15 years (for units which might be properly installed and have received routine maintenance). If you’re increasingly spending extra income to maintain your heating and cooling system, perhaps it is time to consider a replacement unit. Some air conditioning companies use the rule of 5000 to determine if it’s time to change your A/C or furnace. Take the age of the HVAC equipment and multiply that by the estimated repair cost. If you find that the number is more than $5,000, then you should consider replacing the system. So, a 10-year-old unit which includes a $250 repair cost equals $2,500 (10 times 250). Since the figure is below 5000, it’s okay just to repair the unit. If that figure goes over 5000, a replacement may be your best bet. Another point to consider is long-term utility savings by means of a more energy-efficient unit. Energy Star suggests you must think of replacing your central air conditioner and furnace if ever the system is over ten years of age. Also, if you’re thinking of moving within the next few years, then repairing an older air conditioner is superior to spending thousands for a new system that you really won’t be there to be able to use. So, should you repair or replace? Consider the age of the unit, the time you plan on staying in your home, and the cost/frequency of maintenance. Over time, the scales will typically lean towards replacement as repairing an old system becomes less cost effective.