Hepa Filters

@article{First1998HepaF,
  title={Hepa Filters},
  author={Melvin W. First},
  journal={American Biological Safety Association Journal},
  year={1998},
  volume={3},
  pages={33 - 42}
}
  • M. First
  • Published 1 March 1998
  • Environmental Science
  • American Biological Safety Association Journal
The high efficiency particulate air (HEPA) filter has become an indispensable item in the maintenance of biological safety and is also used as a means of preserving cultures from contamination originating in the surrounding air. HEPA filters originated with military requirements for protection against chemical, biological, and radiological warfare agents and to avoid emissions from nuclear weapons production facilities. Everything about these filters was classified "secret" during WWII and for… 

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References

SHOWING 1-2 OF 2 REFERENCES
Aging of Hepa Filters in Service and in Storage
HIGH EFFICIENCY PARTICULATE AIR (HEPA) FILTER: A throwaway, extended/pleated medium, dry-type filter with: (1) rigid casing enclosing the full depth ofthe pleats; (2) minimum particulate removal of
Testing of Nuclear Air-Cleaning Systems, American National Standard, ASME N510-1989
  • 1989