The Helios BLS 100 is designed for supply and extract ventilation in enclosed spaces requiring protection against the spread of fire and smoke. It ensures continuous air exchange to prevent heat build-up, maintaining safety during fire events. Certified with fire resistance classes from F30 up to F120 according to DIN 4102 standards, this unit operates maintenance- and inspection-free as it contains no moving parts. It is also moisture-resistant and shows strong resistance to oils, petrol, and weak acids. Installation is straightforward, making it ideal for projects with type approval (vBG) on a case-by-case basis.