The answer to 'how often to replace central air' is that most central air conditioning units last 15-20 years with proper maintenance. However, the lifespan can vary depending on factors like usage, climate, and maintenance. As a general guideline, you should plan to replace your central air unit every 15-20 years to ensure efficient and reliable cooling for your home.
Regular maintenance like changing air filters, cleaning coils, and scheduling tune-ups can help extend the life of your central AC system. Signs it may be time to replace your unit include reduced cooling performance, higher energy bills, and more frequent breakdowns or repairs. When your system is over 15 years old, it's a good idea to have an HVAC professional evaluate its condition and provide recommendations.