Environmental Health & Safety
CHEMICAL FUME HOOD PERFORMANCE STANDARD
Classical Chemical Fume Hoods Used for Chemical or Radiological Use
- Constant volume chemical fume hoods provide an intake face velocity of approximately 100 linear feet per minute (fpm) across an imaginary vertical plane when the hood's sash opening is approximately 2/3 open.
- Variable air volume (VAV) chemical fume hoods provide an intake face velocity of approximately 100 linear fpm across an imaginary vertical plane regardless of the hood's sash opening.
High-Performance (Low-Flow) Chemical Fume Hoods for Chemical or Radiological Use
- High-performance chemical fume hoods, also known as low-flow chemical fume hoods, operate with a lower intake face velocity. The UofR utilizes the National Institutes of Health (NIH) requirements that these hoods operate at a minimum of 80 linear fpm.
Intake Face Velocity Checks
- The height of the opening is measured from the hood deck for those hoods having deck level air foils.
- During use, the bottom of the sash should be placed even with the arrow on the Air Flow Sticker or lower.
- Chemical fume hoods (used for chemicals) are checked by the Laboratory Safety Unit (extension x5-3241). The date of the test and the result is placed on a sticker (sample shown to the left).
- Chemical fume hoods (used for radioisotope as well as chemicals) are checked annually by Environmental Health & Safety's Radiation Safety Unit (extension x5-3781). The date of the test and the result is placed on a sticker similar to the one shown to the left.
- If there is a problem with a fume hood, please contact Facilities at ext. 3-4567 IMMEDIATELY
Photos of hoods showing proper sash openings for use can be seen in the pdf version of this standard - PDF version.
QUESTIONS or COMMENTS?
Contact EH&S at (585) 275-3241 or e-mail EH&S Questions.
This page last updated 12/7/2015. Disclaimer.