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) Balancing / Regulating Dampers UV Products Iris Dampers Drop Plenum Diffusers 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