Aerodynamics and containment performance of the air-curtain fume hood

designed "air-curtain chemical fume hood" arediagnosed by using the tracer gas concentrationdetection method. It is found that the air curtainproperly setup across the sash opening allowsalmost no sensible exchange of momentum andmass between the flowfields of the cabinet andthe outside environment. Standard SF6 tracergas concentration measurements following theANSIJASHRAE 11 0- 1995 standard and therigorous EN14175 protocol for both the staticand dynamic tests show extra-ordinarilysatisfactory hood performance. The leakage ofthe tracer gas can approach almost null (< 0.001ppm). Particularly, when the hood is installed ina laboratory or building which the draft, humanwalking, and sash movement are severe orunavoidable, the currently developed air-curtainfume hood presents extremely superiorcontainment performance to the conventionalhood.