Chemical Fume Hood Certifications
Hood certifications will be conducted on every fume hood annually, thereafter, or whenever a significant change has been made in its use or location. Chemical Fume Hood certification is determined by the average face velocity, the overall condition of the hood, the types and quantities of chemicals used in the hood. Evaluations will include the quality of the structure, the installation, air flow patterns, and use of the hood. These evaluations will be conducted by SRS.
SRS standards require all chemical hoods to maintain an average face velocity of 100-125 fpm at a sash height of 12 to 16 inches.
A yellow certification sticker will be placed on all hoods that meet SRS standards. The sticker will be placed on the side of the hood with an arrow that shows the maximum safe operating sash height.
If the hood does not meet these requirements, it will be labeled with a red "DO NOT USE" sticker. The hood is not certified for use and may be unsafe. These hoods receive priority maintenance. PPD will send a copy of the form to SRS when the hood is repaired and SRS will re-evaluate the hood prior to employee use.