Ductless Downflow Workstations

HFH Ductless Downflow Workstations utilise advanced carbon filtration technology that offers a safe, high performance alternative to conventional ducted fume hoods for a broad range of applications. Our range of ductless downflow workstations isolate and trap chemical vapors to prevent ecological impact through release into the environment

Carbon filters are available in more than 14 configurations for use with vapours of organic solvents, acids, mercury and formaldehyde. HEPA/ULPA filters can be added for biological safety

Ductless Downflow Workstations from HFH are self-contained and do not require venting to the outside. Many ductless units are portable and may be moved with minimal downtime and without filter changes. Ductless Downflow Workstation set-up, operation and filter maintenance are straightforward

 Because filtered air is returned to the room, no demands are required of the facility HVAC capacity for make-up air improving overall energy efficiency in the facility. 

Facility ductwork, HVAC and construction costs are eliminated because filtered air is returned to the room, no demands are required of the facility HVAC capacity for make-up air. Energy-efficient ebm-papst brand centrifugal blowers promote long life and dependable performance of DWS downflow workstations. Internal systems are isolated from fumes, extending product life. A convenient, strategically placed front cover window shows the installed filter part number and installation date to encourage timely filter replacement in all models of ductless downflow workstations

Unrestricted user access to the front and sides of the workstation also admits ambient illumination and provides an unobstructed view of its contents. The electrostatic pre-filter is accessible from inside the chamber and 91% effective down to 1-3 microns.