Routine maintenance generally includes checking filters, inspecting the heat or enthalpy exchange core, checking fans and accessible air passages, and verifying that supply and exhaust airflow remain appropriate.

The required frequency depends on the model, environment, operating hours, and manufacturer's maintenance instructions. Some cores are washable; others require different care. Do not assume every exchange core can be washed or is maintenance-free.

Professional inspection may be appropriate if airflow drops, abnormal noise develops, or the controller reports a fault.