The Helios SVE 250 is a cost-effective and user-friendly solution for volume control, pressure regulation, and noise reduction in ventilation ductwork. Designed for quick installation by simply sliding it into the duct, it features pre-punched openings for easy and precise adjustment. Made from durable plastic that is both fire-resistant and mould-protected, it complies with emission class M1 and fire class B. In the event of fire, it does not release harmful smoke or toxic gases. Compatible with all types of poppet valves, the SVE 250 ensures safe, quiet, and efficient airflow management.