Germfree LFGI-4USP - Theory of Operation; HEPA Filtration Principles

Theory
HEPA Filtration
The Laminar Flow Glovebox /Isolator uses HEPA (High Efficiency Particulate Air) filters
to provide the highest level of personnel and product protection. These filters are the
laminar flow supply HEPA filter, which filters all air passing over the entire work area, and
the exhaust HEPA filter that filters all air exiting the Laminar Flow Glovebox /Isolator.
Additionally, there are two HEPA filters located inside the HEPA Purge airlock that filter
the purged air. All filters are rated to remove particulates and aerosols 0.3 micron in size
with a minimum efficiency of 99.99%. These filters are even more effective at removing
particulates both larger and smaller than 0.3 microns as the graph below depicts.
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