Definitions for HEPA
hep·a

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1. HEPA

   HEPA (, high-efficiency particulate air) filter, also known as high-efficiency particulate absorbing filter and high-efficiency particulate arrestance filter, is an efficiency standard of air filters.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) or 99.97% (ASME, U.S. DOE) 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. 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). 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. A HEPA filter is also able to capture floor dust which contains bacteroidia, clostridia, and bacilli. HEPA was commercialized in the 1950s, and the original term became a registered trademark and later a generic trademark for highly efficient filters. 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, homes, and vehicles.

WikidataRate this definition:5.0 / 1 vote

1. HEPA

   High-efficiency particulate air or HEPA is a type of air filter. Filters meeting the HEPA standard have many applications, including use in medical facilities, automobiles, aircraft and homes. The filter must satisfy certain standards of efficiency such as those set by the United States Department of Energy. To qualify as HEPA by US government standards, an air filter must remove 99.97% of 0.3 µm particles. This size constitutes the Most Penetrating Particle Size, which is the most difficult size of particle to filter. Smaller and larger particles are filtered at even greater efficiency. A filter that is qualified as HEPA is also subject to interior classifications.

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1. HEPA

   What does HEPA stand for? -- Explore the various meanings for the HEPA acronym on the Abbreviations.com website.

Anagrams for HEPA »

1. epha

2. HAPE

3. heap

How to pronounce HEPA?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say HEPA in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of HEPA in Chaldean Numerology is: 1

2. Pythagorean Numerology

   The numerical value of HEPA in Pythagorean Numerology is: 3

Examples of HEPA in a Sentence

1. Doug Parker:

   I concur. An aircraft is the safest place you can be, it's true of all of our aircraft — they all have the same HEPA filters and air flow.

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References

1. ^ Wikipedia
   https://en.wikipedia.org/wiki/Hepa
2. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=HEPA