Safety cabinets of the obverpressure ISO Class 3 are alternatives to cleanrooms, as they are able to create unloaded, particle-free and sterile conditions for materials in the work space. These safety cabinets provide product protection by providing a particle free working area with overpressure from the G3 pre-filter with an efficiency of at least 80% -90% ASHRAE and the H14 HEPA / ULPA filter with an efficiency better than 99.995% MPPS (H14 - EN: 1822 ) Offer.