The Helios AEGB20/75 is an extract element designed for insertion into ducts with a nominal diameter of 125 mm. Made from durable white polymer, it includes a mounting ring for secure installation. This element provides constant airflow across pressure conditions from 40 to 160 Pa. It features a two-step ventilation system allowing for both general and trickle ventilation modes. The high airflow volume can be manually switched on or off using a convenient pull cord. Ideal for both wall and ceiling duct applications.