The Helios BLS 200/100 is a robust ventilation system designed for secure supply and extract airflow in rooms requiring fire and smoke protection. It provides consistent air exchange to reduce heat accumulation and is classified under fire resistance class F30 to F120 according to DIN 4102 standards. The unit has no moving parts, ensuring a maintenance-free and inspection-free operation. Built to withstand harsh environments, it is resistant to moisture, oils, petrol, and weak acids. Its user-friendly installation and suitability for project-specific type approval (vBG) make it a reliable solution for fire-protected ventilation scenarios.