Ruskin Rooftop Systems 510 series concentric diffuser systems are designed to provide a single point air distribution system with the added benefit of having directional air control. The systems may be used with either a "T-Bar" ceiling or a plaster ceiling.
RRS Flush-Mount Concentric Diffuser, Series: 510 Series, 4-Way Deflection, 5600 to 6600 cfm, 18 x 36 in Duct, 47-5/8 in Length, 47-5/8 in Width, 29-1/4 in Height, Aluminum, Finish: Anodized