The Helios FK‑Ü 100/200 adapter facilitates the transition from a DN 100 mm round pipe to a flat duct measuring 200 x 50 mm. It is part of the underfloor duct system crafted from galvanized steel sheet, specifically developed for domestic ventilation applications. This adapter provides an effective and corrosion-resistant solution for concealed air duct installations, ensuring optimal air distribution in modern building designs.