Low flow fume hood

Patent · Mon Dec 31 23:00:00 EST 2001

OSTI ID:874633

Bell, Geoffrey C ^[1]; Feustel, Helmut E ^[2]; Dickerhoff, Darryl J ^[3]

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1. Pleasant Hill, CA
2. Albany, CA
3. Berkeley, CA

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.

• Research Organization: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA
• DOE Contract Number: AC03-76SF00098
• Assignee: The Regents of the University of California (Oakland, CA)
• Patent Number(s): US 6428408
• OSTI ID: 874633
• Country of Publication: United States
• Language: English

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