Regular maintenance is crucial to ensure the efficiency and longevity of any air conditioning system, and small units are no exception. It is generally recommended that these systems be checked at least once a year by a professional. Maintenance tasks typically include cleaning or replacing filters, checking the refrigerant levels, and ensuring that all components are functioning correctly. Additionally, users can perform simple maintenance tasks such as regularly cleaning the external surfaces and making sure the unit’s intake and outlet vents are not obstructed.