Ductless downflow workstation is nothing but a greater performance ductless fume hood. A ductless fume hood is an enclosure that draws air across the work zone and its in-built carbon filtration or HEPA/ ULPA particle filtration cleans that air. It guards the person and the vicinity from toxic chemicals so that he can concentrate on his task. Downflow workstation is a ductless tabletop unit withā¦