The Helios SVE 80 is a space-saving and cost-effective solution for managing air volume, reducing noise, and controlling pressure within central ventilation systems. Designed for easy installation, this insert is placed directly into the duct and features pre-punched holes for accurate airflow adjustment. Made from mould-resistant and fire-retardant foam, it meets emission class M1 and fire class B standards, ensuring it releases no toxic gases or smoke in the event of a fire. Compatible with all types of poppet valves, the SVE 80 is ideal for compact ductwork environments requiring reliable and safe airflow control