Should my Class II A2 BSC be thimble connected to the building exhaust system?
For most applications, it is not necessary to connect a Class II A2 BSC to the building ventilation system. Class II A2 cabinets are designed to be “convertible” units and can be connected to the ventilation system using a thimble connection designed with an air gap. This is recommended only in certain situations that merit connection to the HVAC system. Contact OEHS (2-4911) and Facilities Management before having any BSC connected (or disconnected) to the building exhaust system. Can I use a clean bench for biohazardous work? Laminar Flow Cabinets, sometimes referred to as Clean Benches, may be used for work with materials that are non-infectious. No infectious work (human cell lines, infectious microorganisms, toxins, or animal work) should be performed in Laminar Flow Cabinets. They are not recommended as they provide only product protection, and in effect, blow air from the cabinet into the user’s face providing no personnel protection. Should my BSC be hard ducted or thimble conn
