The Department of Energy recommends homeowners to replace their systems every 10-15 years. Modern systems offer more efficiency than those manufactured 10+ years ago. Some other signs it’s time to replace may include if repair costs are more than half the cost of a new unit, constantly increasing energy bills, unusual smells and sounds, and others. When you’re ready for an HVAC replacement in Cary and the surrounding areas, give AnyDay Heating & Cooling a call.