HEPA filter definition

HEPA filter means high-efficiency particulate air filters that are rated to achieve a minimum initial particle-removal efficiency of 99.97 per cent using ASTM F 1471– 93 or equivalent standard;
HEPA filter means a high efficiency particulate aerosol filter that is at least 99.97 per cent efficient in collecting a 0.3 micrometre aerosol;

Examples of HEPA filter in a sentence

  • After January 10, 1989, if the use of a fabric filter creates a fire or explosion hazard, or the Director determines a fabric filter is not feasible, the Director may authorize as a substitute the use of wet collectors designed to operate with a unit contacting energy of at least 9.95 kilopascals (or 40 inches water gage pressure), or use a HEPA filter that is certified to be at least 99.97 percent efficient for 0.3 micron particles.

  • With the HEPA filter and fans within the wet bench, it can become a Class 100 working environment or better.

  • This testing would be comprised of smoke loading a HEPA filter until failure or a dP of 20 in.

  • The test is performed by using a HEPA filter rather than a paint arrestor.

  • The ventilator control system (Stack V-1) shall consist of a fan with a constant flow rate that draws air from the building through a HEPA filter which vents to the atmosphere through a stack.


More Definitions of HEPA filter

HEPA filter means a High Efficiency Particulate Air filter used to remove particles less than one (1) micron in aerodynamic diameter and operates at removal efficiencies of 99.9 percent or greater.
HEPA filter means a high-efficiency particulate air filter, used in respirators and vacuum systems, capable of capturing particles of 0.3 microns with 99.97% efficiency.
HEPA filter means a high efficiency particulate air filter capable of trapping and retaining at least ninety-nine and ninety-seven hundredths percent (99.97%) of all monodispersed particles of three-tenths (0.3) micrometers in diameter or larger.
HEPA filter means a high efficiency particulate air filter certified by the manufacturer to have a collection efficiency of not less than ninety-nine and ninety-seven one hundreths per cent as determined by ASTM D2986-71.
HEPA filter means high-efficiency particulate air filters that are rated to achieve a minimum initial particle-removal efficiency of 99,97 % using ASTM F 1471–93;
HEPA filter means a high efficiency particulate absolute filter capable of retaining 99.97 percent of particles (including fibers) that are greater than 0.3 micrometers in mass median aerodynamic equivalent diameter, with an efficiency designation of 100 in accordance with NIOSH 42 CFR 84, Respiratory Protection Devices.
HEPA filter means a high efficiency particulate air fil- ter that removes particles of 0.3 microns or larger from the air at