The answer to 'how often to replace zone control system' is that zone control systems typically last 10-15 years with proper maintenance. These systems regulate the temperature and airflow in different zones of a home, providing customized climate control. Over time, the components can wear out or become outdated, requiring replacement.
It's important to have a professional HVAC technician inspect your zone control system every 1-2 years to ensure it's operating efficiently. They can identify any issues and recommend when it's time to replace the system to maintain optimal performance and energy savings.