High-efficiency particulate air filter


Also found in: Medical.

high-efficiency particulate air filter

[‚hī i¦fish·ən·sē pər‚tik·yə·lət ′er ‚fil·tər]
(mechanical engineering)
An air filter capable of reducing the concentration of solid particles (0.3 millimeter in diameter or larger) in the airstream by 99.97%. Also known as HEPA filter.

High-efficiency particulate air filter

(HEPA)
An air filter that captures a high percentage of all particles, including very small particles not caught by other types of filters.
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References in periodicals archive ?
Use a high-efficiency particulate air filter in your bedroom and avoid mowing the lawn or raking leaves, which stirs up pollen.
After they were inoculated with rhinovirus, culture plates were placed at a table where the volunteers sat breathing quietly for 20 minutes in a special chamber outfitted with a high-efficiency particulate air filter that cleared the air of any bacteria prior to the experiments.
They also say to vacuum your home with a high-efficiency particulate air filter bag in the appliance.
A vacuum shield fits over the nozzle and is connected to a high-efficiency particulate air filter, which traps the abrasives and the material removed from the surface.

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