Floor duct flush with screed with tray made of sheet steel BKW 300x (80-120) mm. Screed-flush installation duct according to DIN EN 50085-1 and DIN EN 50085-2-2, with floor pan, consisting of: duct side profiles made of aluminum, crossbars, screed anchors, floor covering application profiles (0 or 4 mm) made of plastic, leveling clamps with duct connectors and leveling pins, screwed blind covers, suitable for dry-maintained floors, acoustically decoupled, pre-assembled at the factory.