The Helios ELS‑D 125 is a two-step fire shut-off device engineered for horizontal installation in ventilation systems. It helps prevent the spread of fire through ductwork to upper or lower building levels. The unit features a space-saving, compact design with an integrated ceiling duct made of galvanized sheet steel.
Both ends are fitted with duct connection spigots that comply with DIN 24145/24147 standards, ensuring reliable integration with standard duct systems. It includes two flexible fixing clips for easy mounting. Certified to fire resistance class K 90 in accordance with DIN 18017, the ELS‑D 125 is approved under certificate number Z‑41.3 – 368, offering dependable fire protection in residential or commercial ventilation installations.