The answer to 'how often to replace ductless system' is that ductless HVAC systems typically last 10-15 years with proper maintenance. These systems are highly efficient and durable, but like any HVAC equipment, they will need to be replaced eventually as components wear out over time. Regular maintenance by a professional HVAC technician can help extend the lifespan of a ductless system.
Factors that can impact the replacement timeline for a ductless system include the quality of the equipment, how often it is used, and the environment it operates in. Homes with higher cooling or heating demands may see the system wear out faster. With proper care, many ductless systems can operate reliably for well over a decade before needing to be replaced.