HEPA filtration

Traps airborne particles

HEPA filtration is an air-cleaning technology that captures extremely small particles—dust, pollen, mold spores, bacteria, and some viruses.

HEPA stands for High Efficiency Particulate Air, and filters meeting the standard must trap at least 99.97% of particles 0.3 microns in diameter.

The technology appears in vacuum cleaners, air purifiers, hospital ventilation systems, and cleanrooms: The allergist recommended an air purifier with HEPA filtration.

Related
  • airGaseous envelope surrounding Earth
  • air qualityPollution level measurement
  • purifierContamination removal device
  • dustFine settled particles
  • dust mitesMicroscopic skin-eating arachnids

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Opposites
filtration effectiveness

HEPA filtrationwindow screen

Mesh barrier for openings

air quality approach

HEPA filtrationnatural ventilation

Airflow without powered fans

open windows · outdoor air

Family

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Familiarity
Top 500,000
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Used worldwide · Timeless · Concrete · Rated G