1991
DOI: 10.1080/1047322x.1991.10387865
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Field Results of an In-Place, Quantitative Performance Test for Laboratory Fume Hoods

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Cited by 13 publications
(12 citation statements)
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“…Other research has also shown the impact of room air conditioning (or makeup air) on the performance of fume hood containment (Caplan and Knutson 1982, DiBerardinis, First et al 1991, Altemose, Flynn et al 1998. Altemose et al found that the magnitude of cross draft velocities relative to hood face velocity is an important factor in determining whether a hood will leak.…”
Section: Discussionmentioning
confidence: 99%
“…Other research has also shown the impact of room air conditioning (or makeup air) on the performance of fume hood containment (Caplan and Knutson 1982, DiBerardinis, First et al 1991, Altemose, Flynn et al 1998. Altemose et al found that the magnitude of cross draft velocities relative to hood face velocity is an important factor in determining whether a hood will leak.…”
Section: Discussionmentioning
confidence: 99%
“…Three studies (4,15,49) reported the effects of exhaust volume rate but all resulted in different findings. One study (15) reported that lower hood leakages were measured with increased exhaust airflow rates, but another study (49) found higher breathing zone concentrations with higher flow rates; however, this was not conclusive due to the influence of other confounding factors). The other study (4) did not find any Tracer source height Higher tracer concentrations with increased distance from the hood floor (28,42,45) 3 N o…”
Section: Hood Design Elements and Operating Variablesmentioning
confidence: 93%
“…Measurement values were most frequently reported as the concentration of the tracers used at breathing zone or at the hood face. However, other metrics such as hood index (the negative log of the ratio of the concentration outside a fume hood at breathing zone and the concentration inside the hood at contaminant source); (12) protection factor (the negative log of the ratio of the number value (mg/m 3 ) of breathing zone concentration and the number value (mg/min) of ejector release rate); (13) dilution ratio (the ratio between tracer gas concentration within the fume hood and that in the operator's breathing zone); (14) and leakage percentage (the ratio between the concentration outside the hood or personal exposure and the concentration inside the hood) (15) were also used.…”
Section: Methodsmentioning
confidence: 99%
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“…In another study of VAV hoods, we found adjustment of the middle slot to have no bearing on face velocity and air volume measurements or ASHRAE 110 containment testing. Measurements of sulfbr hexafluoride and DOP release were taken at sash heights of 40, 30, and 20 cm (16,12, and 8 inches).…”
Section: Methodsmentioning
confidence: 99%