BSC Class II, Type B2: These biosafety cabinets may be exhausted to the room or connected to a facility exhaust system via a “canopy” connection (NSF recommends a canopy connection for cabinets exhausted to the outdoors).


Class II Protection From Particulates From Vapors and Gases
Type B2 Personnel, work area (products) and environment
  • Offers protection to personnel; (offers protection to environment if exhausted to treated system)