Division Title

Chemical Fume Hood Testing

The Division of Occupational Health and Safety (DOHS) provides various services regarding certification, maintenance, repair, and decontamination of chemical fume hoods and other specific primary barrier equipment.

Chemical fume hoods and other ventilation systems known as local exhaust ventilation systems or LEVs (down draft tables and sinks, slot hoods, and canopy hoods) are certified when installed and on an annual basis. The certification of these systems includes inspection, verification of air flow velocities and direction, and smoke capture.  Maintenance for these units is done by the Office of Research FacilitiesExit arrowand can be contacted at (301) 435-8000.


Services are provided for other types of primary barrier equipment, such as, vertical and horizontal clean benches, cage change stations, animal racks, animal isolators, and HVAC HEPA filter banks.