HEPA Efficiency Filter is a type of pleated mechanical air filter. It is an acronym for "high efficiency particulate air [filter]" (as officially defined by the U.S. Dept. of Energy). This type of air filter can theoretically remove at least 45% of dust, pollen, mold, bacteria, and any airborne particles with a size of 0.5 microns (µm). The diameter specification of 0.3 microns responds to the worst case; the most penetrating particle size (MPPS). Particles that are larger or smaller are trapped with even higher efficiency. Using the worst case particle size results in the worst case efficiency rating (i.e. 45%~95% or better for all particle sizes).

All air cleaners require periodic cleaning and filter replacement to function properly. Follow manufacturer's recommendations on maintenance and replacement.

To put it simply, medium efficiency filters trap air contaminants in a complex web of fibers. Depending on the size of the particle, this can happen in four different ways: Inertial Impaction, Diffusion, Interception, or Sieving.

Larger contaminants are trapped via inertial impaction and sieving. The particles either collide with the fibers and become trapped or are trapped while attempting to travel through the fibers. Medium sized particles, as they move through the filter, are grabbed by the fibers via interception. Smaller particles are dissipated as they travel through the filter and eventually collide with a fiber and are trapped

1. Low resistance and high effciency
2. Thin frame and light in weight
3. Easy to installation
4. High temperature resistance

1. Suitable for the filtration of paint, viscose, resin dyes, ink and oil products, chemicals and other industries.
2. Intermediate filtration of centralized ventilation and air conditioning system in cleanroom.