... ,D200/600,D250/600,D315/600,D400/600. Characteristics:Swirl Diffuser Material:Galvanized steel Material thickness:0.8-1.2mm Finish ... screws or clips Product description:Swirl DiffuserThis is a fixed diffuser, offering a high volume flow rate at low sound power ... mix rapidly with the indoor air, hence rapid reduction in jet velocity and temperature differential, making room quite comfortable. Supply air ...