​​​​How do I know if the fume hood in my labortory is working correctly?

Safety is the primary function of fume hoods.  Proper performance and use of the fume hood is essential in providing safety to the user and other laboratory personnel.  They exhaust toxic, flammable, noxious, or hazardous fumes and vapors by capturing, diluting, and exhausting these materials through the ductwork.  If used correctly fume hoods also provide spill containment and physical protection against fire and explosion.  

Environmental Health and Safety (EHS) evaluates and certifies laboratory fume hoods used at Texas A&M University. To be certified by EHS, fume hood’s average face velocity, the overall condition of the hood, and the types and quantities of chemicals used in the hood are evaluated.  Requirements for certification may vary according to hood design and use.​

EHS uses the ANSI/AIHA Z9.5-2012 standard for certification of fume hoods ac​ross Texas A&M University campus. 

Fume hoods are evaluated and certified annually.  ​They may also need certification at other times. Examples of such instances include:

  • After major ​​lab renovations or fume hood repair ​​work 
  • Newly installed fume hoods
  • After relocation of the fume hood to a different building/room in the same builidng.
  • If you smell vapors or fumes when working in the hood

When should I contact EHS?

If any or all of the follwoing is noticed please contact EHS at ehsd-fumehood@tamu.edu​​

  • ​If the Kim-wipe test fails (please see below)
  • If the light in the fume is not working
  • If you do not hear the fume hood running
  • If you smell fumes or vapours when working in the hood
  • If the hood has been relocated
  • If you have a new hood in your lab
  • If the white inspection sticker is missing but the hood is not tagged out of service 

How do I know my fume hood PASSED the certification test?

​Fume hoods that PASS the certification will have a white sticker (as shown below) found on the right hand side of the sash​. A valid certification sticker should have the date of inspection, inspectors' intials and the average face velocity. If you notice the sticker is missing or torn out but the fume hood is not tagged out of service please contact Alvin Walker at ehsd-fumehood@tamu.edu​. ​

Fume hood inspection sticker.JPG

How do I know my fume hood FAILED the certification test?​


Fume hoods that FAIL the certification are tagged Out of Service. The following sign is posted on the sash of the failed hoods. Please do not remove this sign and use the fume hood tagged out of service untill repairs are complete and the hood is recertified by EHS. ​​It is the responsibility PI and laboratory personnel to ensure the ​fume hood is working properly ​by making sure the hood has a certification sticker or if it was tagged out of service, to submit a work order through Aggie Works.

 failsign FH.jpg

Kim-Wipe Test

As a daily practice, fume hood performance should be checked by the user by simply holding a Kim-wipe in front of the hood with the sash slightly open to verify the hood’s operation. if the air flow is within acceptable range the Kim-wipe should be drawn toward the hood.