Skip to Content
Find More Like This
Return to Search

Low flow fume hood

United States Patent

August 6, 2002
View the Complete Patent at the US Patent & Trademark Office
Lawrence Berkeley National Laboratory - Visit the Technology Transfer and Intellectual Property Management Department Website
Energy Efficient Laboratory Fume Hood
A fume hood is provided having an adequate level of safety while reducing the amount of air exhausted from the hood. A displacement flow fume hood works on the principal of a displacement flow which displaces the volume currently present in the hood using a push-pull system. The displacement flow includes a plurality of air supplies which provide fresh air, preferably having laminar flow, to the fume hood. The displacement flow fume hood also includes an air exhaust which pulls air from the work chamber in a minimally turbulent manner. As the displacement flow produces a substantially consistent and minimally turbulent flow in the hood, inconsistent flow patterns associated with contaminant escape from the hood are minimized. The displacement flow fume hood largely reduces the need to exhaust large amounts of air from the hood. It has been shown that exhaust air flow reductions of up to 70% are possible without a decrease in the hood's containment performance. The fume hood also includes a number of structural adaptations which facilitate consistent and minimally turbulent flow within a fume hood.
Bell; Geoffrey C. (Pleasant Hill, CA), Feustel; Helmut E. (Albany, CA), Dickerhoff; Darryl J. (Berkeley, CA)
The Regents of the University of California (Oakland, CA)
09/ 574,711
May 18, 2000
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH This invention was made with government support under Grant (Contract) No. DE-AC03-76SF00098 awarded by The U.S. Department of Energy. The government has certain rights to this invention.