HEPA Filter - High Efficiency Particulate Air Filter - An extended-medium, dry-type filter in a rigid
frame when tested at rated airflow having a minimum particle collection efficiency of 99.97% for 0.3-μm
mass median diameter particles of DOP when tested in accordance with MIL-STD-282.
Canopy/...
CETA Application Guide CAG-007
HEPA Filter - High Efficiency Particulate Air Filter - An extended-medium, dry-type filter in a rigid
frame when tested at rated airflow having a minimum particle collection efficiency of 99.97% for 0.3-μm
mass median diameter particles of DOP when tested in accordance with MIL-STD-282.
Canopy/Thimble/Air Gap Connection - A BSC exhaust connection where there are one or more
openings in he connection between the BSC and the external exhaust system.
- Must have an audible and visual alarm
- Must allow proper inflow in the event of an exhaust system failure
Chemical Fume Hood - Enclosure that uses a remote exhaust blower to draw a volume of air into
the front opening. Air is then drawn through the top of the hood and through the exhaust without
filtration.
Chemical Risk Assessment - The process of hazard identification, exposure assessment, dose-
response assessment, risk characterization/risk management of the work being performed inside a bio-
safety.
Class II Biosafety Cabinet Types - - Class II (Type A1, A2, C1, B1, and B2) BSCs are partial barrier
systems that rely on the movement of air to provide personnel, environmental, and product protection.
- When used as designed, the BSC exhaust air may be recirculated to the laboratory (Type A1, A2, and C1
BSCs) or discharged from the building via a canopy connection and remote blower (Type A1, A2, and C1
BSCs)
- Exhaust air from Types B1 and B2 BSCs must be discharged to the outdoors via a sealed connection and
remote blower.
BSC - A partial barrier system that relies on the movement of air to provide personnel,
environmental and Product protection.
Constant Air Volume (CAV) Control Valve - A ventilation system valve designed to maintain a
constant quantity of airflow within its ductwork.
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