Fume Hood Performance: Slot Settings and Containment Testing

Reiman, James; Joao, Richard V.; Volin, C. E.; Fernandez, John S.; Party, Esmeralda; Gershey, Edward L.

doi:10.1080/1047322x.1998.10389147

Cited by 6 publications

(12 citation statements)

References 9 publications

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“…Leaving a hood closed when not in use is touted as a method of conserving energy costs as well. These findings and those on aerosol containment reported by us (11) suggest that a hlly closed sash position may not always be advisable.…”

Section: Discussionmentioning

confidence: 48%

Fume Hood Performance: Using a Bypass in Variable Air Volume Systems

Joao

Party

Gershey

1998

Applied Occupational and Environmental Hygiene

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Section: Discussionmentioning

confidence: 48%

Fume Hood Performance: Using a Bypass in Variable Air Volume Systems

Joao

Party

Gershey

1998

Applied Occupational and Environmental Hygiene

Self Cite

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“…Four studies consistently reported that when different tracers, contaminant release rates, or ejectors were used while other conditions were not changed, breathing zone concentrations varied. (4,5,21,29) Three studies (16,42,43) reported increased leakage levels with higher tracer gas volume rates, whereas one study (44) reported no significant effects before an overloading point was reached. The findings for the ejector and tracer source height and the position of a sampling probe were not consistent among the listed studies.…”

Section: Test Methodsmentioning

confidence: 91%

“…(15,39,(45)(46)(47)(48) The lack of good hood design includes nonaerodynamic design of sash edges, sharp bottom horizontal sash track, absence of bottom airfoil, absence of baffle, and flanges with acute angles. Five studies (4,(24)(25)(26)49) consistently found that slot opening adjustment affected hood performance. For good hood performance, the slot opening positions should be properly set -the top slots should be closed or minimally opened and the bottom slots should be fully open.…”

Section: Hood Design Elements and Operating Variablesmentioning

confidence: 91%

“…The authors selected the comparable studies (4,13,(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30)(31)(32)(33)(34) that met all of the following conditions:…”

Section: Methodsmentioning

confidence: 99%

“…Many studies have experimentally investigated the effects of various factors on hood performance using either a tracer gas or aerosols, such as diethylhexyl phthalate (DEHP), (4) potassium iodide (KI), (5) or uranine (6) as the contaminant source. Those studies enhanced the understanding of the characteristics of hood performance under the various tested conditions.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Review of Published Quantitative Experimental Studies on Factors Affecting Laboratory Fume Hood Performance

Ahn¹,

Woskie²,

DiBerardinis

et al. 2008

Journal of Occupational and Environmental Hygiene

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This study attempted to identify the important factors that affect the performance of a laboratory fume hood and the relationship between the factors and hood performance under various conditions by analyzing and generalizing the results from other studies that quantitatively investigated fume hood performance. A literature search identified 43 studies that were published from 1966 to 2006. For each of those studies, information on the type of test methods used, the factors investigated, and the findings were recorded and summarized. Among the 43 quantitative experimental studies, 21 comparable studies were selected, and then a meta-analysis of the comparable studies was conducted. The exposure concentration variable from the resulting 617 independent test conditions was dichotomized into acceptable or unacceptable using the control level of 0.1 ppm tracer gas. Regression analysis using Cox proportional hazards models provided hood failure ratios for potential exposure determinants. The variables that were found to be statistically significant were the presence of a mannequin/human subject, the distance between a source and breathing zone, and the height of sash opening. In summary, performance of laboratory fume hoods was affected mainly by the presence of a mannequin/human subject, distance between a source and breathing zone, and height of sash opening. Presence of a mannequin/human subject in front of the hood adversely affects hood performance. Worker exposures to air contaminants can be greatly reduced by increasing the distance between the contaminant source and breathing zone and by reducing the height of sash opening. Many other factors can also affect hood performance. Checking face velocity by itself is unlikely to be sufficient in evaluating hood performance properly. An evaluation of the performance of a laboratory fume hood should be performed with a human subject or a mannequin in front of the hood and should address the effects of the activities performed by a hood user.

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Sustainable laboratory evaluations: Optimized fume-hood- intensive ventilation and energy efficiency without compromising occupational safety and comfort

Hii

Wong

et al. 2022

Journal of Cleaner Production

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Fume Hood Performance: Slot Settings and Containment Testing

Cited by 6 publications

References 9 publications

Fume Hood Performance: Using a Bypass in Variable Air Volume Systems

Fume Hood Performance: Using a Bypass in Variable Air Volume Systems

A Review of Published Quantitative Experimental Studies on Factors Affecting Laboratory Fume Hood Performance

Sustainable laboratory evaluations: Optimized fume-hood- intensive ventilation and energy efficiency without compromising occupational safety and comfort

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