An air volume sensor is a component used in some advanced Ductless Mini Splits to monitor the speed of the blower fan. It ensures that the Indoor Air Handler is providing the correct amount of CFM for the set mode. If the sensor detects a drop in airflow, it may trigger a "clean filter" light or an error code. This is a key part of the intelligent performance found in our Olivia Series. It helps the system maintain a consistent Delta T across the room. You can find replacement Sensors and other electronics in our online shop. Maintaining high airflow is essential for the comfort and efficiency of your Single-Zone unit. It’s another layer of "smart" tech that sets our systems apart.