Duct-mounted grilles — air distribution with direct duct mounting

Duct-mounted grilles fix directly onto the ventilation duct — circular or rectangular — without requiring a plenum box or opening in a wall or ceiling. Used in industrial and commercial installations where ductwork is exposed (not concealed), in warehouses, halls and plant rooms. Advantage over wall grilles: no need to create a wall or ceiling opening and connect to ductwork — the grille mounts directly onto the duct with screws or clamps, reducing installation time and execution complexity. Available as supply grilles with blades for uniform downward or lateral air distribution, simple exhaust grilles, and grilles with integrated backdraught shutter. Available for circular (all standard diameters) and rectangular ducts.