The Helios AE-HYGRO-10/45 is a ready-to-install air extract element designed for ducts with a nominal diameter of 125 mm. Made from white polymer, it is suitable for wall and ceiling installation. This element automatically adjusts the airflow according to the relative humidity, maintaining the airflow between set minimum and maximum limits without the need for any electrical connection. This ensures efficient, demand-controlled ventilation that responds to changing indoor humidity levels.