Products Architectural Louvers, Dampers, Roof Curbs, Actuators, Grilles, Sunshades and more. VAV Terminals - VAV Terminals: Model:R-650 Retrofit Terminal-Round Ducts APPLICATION The Model R-650 was designed specifically for retrofit projects. This model includes a metal-point cross flow, bell-mouth for smooth laminar flow,and self-adhesive backed flange. R-650 DOCUMENTS - Submittal Sheet - R-650 BIM (REVIT) Drop Plenum Diffusers Balancing / Regulating Dampers UV Products Iris Dampers Louvers Dampers UL Listed Dampers Roof Curbs and Rails Sunshades Architectural Grilles Ventilators Doors Actuators Fans Air Measuring Products VAV Terminals Security Bars & Grilles Plenums Duct Take-Offs Custom Work Manufacturer Cross Referencing System View Now Previous Next