The UFR is designed for applications in a pressurized underfloor air distribution system. Constructed of a highimpact, polycarbonate material, the UFR is a sturdy and long lasting diffuser that can resist heavy foot traffic and exceeds NFPA 90B requirement. With its architecturally appealing face, available in gray or black, the UFR should fit well in any color scheme. The UFR’s matching trim-ring has an extra-wide flange that is designed to prevent carpet from pulling away from the diffuser. Other features of the UFR include: Removable flow regulator(manually operated without removing the core), simple relocation and a dirt/dust receptacle that can be easily removed for cleaning. The UFR can be installed after flooring and carpet installation has been completed.