HEPA filter corrugated internal structure and aluminium support along with the description of its functioning principle (interception, impact and diffusion of dust particles through a dense non-woven fiber material)
HEPA (/ˈhɛpə/, high-efficiency particulate air) filter,[1] also known as high-efficiency particulate absorbing filter[citation needed] and high-efficiency particulate arrestance filter,[2] is an efficiency standard of air filters.[3]
Filters meeting the HEPA standard must satisfy certain levels of efficiency. Common standards require that a HEPA air filter must remove—from the air that passes through—at least 99.95% (ISO, European Standard)[4][5] or 99.97% (ASME, U.S. DOE)[6][7] of particles whose diameter is equal to 0.3 μm, with the filtration efficiency increasing for particle diameters both less than and greater than 0.3 μm.[8] HEPA filters capture pollen, dirt, dust, moisture, bacteria (0.2–2.0 μm), virus (0.02–0.3 μm), and submicron liquid aerosol (0.02–0.5 μm).[9][10][11] Some microorganisms, for example, Aspergillus niger, Penicillium citrinum, Staphylococcus epidermidis, and Bacillus subtilis are captured by HEPA filters with photocatalytic oxidation (PCO). A HEPA filter is also able to capture some viruses and bacteria which are ≤0.3 μm.[12] A HEPA filter is also able to capture floor dust which contains bacteroidia, clostridia, and bacilli.[13] HEPA was commercialized in the 1950s, and the original term became a registered trademark and later a generic trademark for highly efficient filters.[14] HEPA filters are used in applications that require contamination control, such as the manufacturing of hard disk drives, medical devices, semiconductors, nuclear, food and pharmaceutical products, as well as in hospitals,[15] homes, and vehicles.
^"GLOSSARY". HEPA Corporation. Archived from the original on 2020-04-20. Retrieved 2021-05-14.
^"HEPA". The Free Dictionary. Archived from the original on 2020-04-20. Retrieved 2021-05-14.
^"Efficiency of the HEPA air filter: HEPA filter quality and bypassing". Air-Purifier-Power. Archived from the original on 2020-04-20. Retrieved 2021-05-14.
^Cite error: The named reference ISO 29463 was invoked but never defined (see the help page).
^European Standard EN 1822-1:2009, "High efficiency air filters (EPA, HEPA and ULPA)", 2009
^American Society of Mechanical Engineers, ASME AG-1a–2004, "Addenda to ASME AG-1–2003 Code on Nuclear Air and Gas Treatment", 2004
^Barnette, Sonya. "Specification for HEPA Filters Used by DOE Contractors — DOE Technical Standards Program". www.standards.doe.gov. Archived from the original on 2020-04-20. Retrieved 2019-06-05.
^Guidance for Filtration and Air-Cleaning Systems to Protect Building Environments from Airborne Chemical, Biological, or Radiological Attacks(PDF). Cincinnati, OH: National Institute for Occupational Safety and Health. April 2003. pp. 8–12. doi:10.26616/NIOSHPUB2003136. Archived (PDF) from the original on February 10, 2020. Retrieved 2020-02-09.
^Godoy, Charlotte; Thomas, Dominique (2020-07-02). "Influence of relative humidity on HEPA filters during and after loading with soot particles". Aerosol Science and Technology. 54 (7): 790–801. Bibcode:2020AerST..54..790G. doi:10.1080/02786826.2020.1726278. ISSN 0278-6826. S2CID 214275203.
^Payet, S.; Boulaud, D.; Madelaine, G.; Renoux, A. (1992-10-01). "Penetration and pressure drop of a HEPA filter during loading with submicron liquid particles". Journal of Aerosol Science. 23 (7): 723–735. Bibcode:1992JAerS..23..723P. doi:10.1016/0021-8502(92)90039-X. ISSN 0021-8502. Archived from the original on 2021-05-16. Retrieved 2021-03-05.
^Schentag, Jerome J.; Akers, Charles; Campagna, Pamela; Chirayath, Paul (2004). SARS: CLEARING THE AIR. National Academies Press (US). Archived from the original on 2021-01-05. Retrieved 2021-03-04.
HEPA (/ˈhɛpə/, high-efficiency particulate air) filter, also known as high-efficiency particulate absorbing filter[citation needed] and high-efficiency...
Kamaka Qapqan Hepa (born January 27, 2000) is an American professional basketball player who last played for Rīgas Zeļļi of the Latvian-Estonian Basketball...
HepaRG cell line is a human hepatic in vitro line used in liver biology research and for assessing liver pathology, hepatotoxicity, and drug-induced injury...
air-compressor part of the gas turbines. High efficiency particulate arrester (HEPA), originally called high-efficiency particulate absorber but also sometimes...
air purifier with a HEPA filter as a way to reduce transmission of COVID-19 virus, saying "Portables with a high-efficiency HEPA filter and sized for...
worker and the surrounding environment from pathogens. All exhaust air is HEPA-filtered as it exits the biosafety cabinet, removing harmful bacteria and...
for two world tours supporting those albums. He has since recorded with Hepa-Titus. 1987 – Taint Pluribus Taint Unum 1989 – Daddy Has a Tail 1990 – Effete...
through fan units containing high-efficiency particulate absorbing filters (HEPA), and/or ultra-low particulate air (ULPA) filters to remove internally generated...
exhaust air. However, studies have shown that even vacuum cleaners featuring HEPA (High Efficiency Particulate Air) filters tend to release a large amount...
than other ratings. For example, often a high-efficiency particulate air (HEPA) filter is impractical in residential central heating, ventilation, and air...
semiconductor wafers, or any particle sensitive materials. Air is drawn through a HEPA filter and blown in a very smooth laminar flow in a narrow vertical curtain...
successfully removed from the air and is used to classify the efficiency of HEPA filters. Ratings range from 1-16 and efficiency increases as the rating increases...
and is claimed to dry the hands in 10 to 12 seconds. The Airblade uses a HEPA filter to remove bacteria and mould from the air. The Dyson Airblade is the...
(used in DICOM, Medical imaging) Most Penetrating Particle Size (used in HEPA) Mandal Parishad Primary Schools State Government Schools of India. This...
Gilukhipa, or more probable Kilu-Hepa in Hurrian language, in the Egyptian language Kirgipa (fl. early 14th c. BCE), was the daughter of Shuttarna II,...
is tested for absence of HIV, HCV, herpes virus, and reovirus. Bayhep B HepaGam B (US market; intravenous preparation) HyperHEP B (US market; intramuscular...
Numatic International Ltd (Founded as Numatic Engineering Limited) is a British manufacturer primarily producing domestic, commercial and industrial cleaning...
children." Damp dusting and vacuum cleaners with sealed bodies and fitted with HEPA filters reduce re-distribution of the dander dust, with associated dust mites...
grandson of Artatama I. His sister Gilukhipa (Gilu-ḫepa in Hurrian) and his daughter Tadukhipa (Tadu-ḫepa in Hurrian) were married to the Egyptian pharaoh...
was sent by Shuttarna II to Egypt to marry the 18th dynasty pharaoh Amenhotep III. Her name is sometimes written as Gilukhipa, Kilu-Hepa, or Kirgipa....
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