2x4 44W Selectable RAB SWISH AIR Air-Return TrofferThe RAB SWISH AIR 24 replaces both the standard LED troffer and the separate HVAC return air grille in drop ceiling T bar grids cutting ceiling clutter, reducing installation coordination, and delivering a cleaner, more professional look in open offices, classrooms, retail spaces, and anywhere ceiling appearance matters. One Fixture, Two Jobs: Built in vents route HVAC return air directly through the fixture body, integrating with the ceiling plenum