The Helios FK-BA 150 is a floor grille complete with installation housing, sized 150 x 50 mm, crafted from galvanized sheet steel. It is specifically designed for use with underfloor duct systems characterized by a flat, rigid design that is corrosion-resistant and non-combustible. The system features external connecting sleeves that ensure smooth inner duct surfaces, which minimize airflow resistance and reduce dirt buildup, enhancing the overall ventilation efficiency.