Aeromech make  Class II Bio Safety Cabinet  : Aeromech™ Class II Type B2 cabinets have HEPA filtered down flow air drawn from the laboratory, and exhaust 100% of the inflow and down flow air to the atmosphere after filtration through a HEPA filter. There is no recirculation of air in the cabinet or air returned to the laboratory. Where BSC applications could include work with more than minute quantities of volatile chemicals, or work with chemicals for which the physical properties or hazards are unknown or are known to present special hazards, a Type B2 cabinet is recommended.  These cabinets provide 100% exhaust with no recirculation into the room or BSC. Exhaust from Type B2 cabinets must be interlocked with the blower or building exhaust system to prevent pressurization of the BSC. For applications that require product protection, such as transgenic animal or in vitro work, a chemical fume hood with not offer the necessary product protection.

Aeromech make  Class II Bio Safety Cabinet  : Aeromech™ Class II Type B2 cabinets have HEPA filtered down flow air drawn from the laboratory, and exhaust 100% of the inflow and down flow air to the atmosphere after filtration through a HEPA filter. There is no recirculation of air in the cabinet or air returned to the laboratory. Where BSC applications could include work with more than minute quantities of volatile chemicals, or work with chemicals for which the physical properties or hazards are unknown or are known to present special hazards, a Type B2 cabinet is recommended.  These cabinets provide 100% exhaust with no recirculation into the room or BSC. Exhaust from Type B2 cabinets must be interlocked with the blower or building exhaust system to prevent pressurization of the BSC. For applications that require product protection, such as transgenic animal or in vitro work, a chemical fume hood with not offer the necessary product protection.