4 products in this product line
High-Efficiency Particulate Air (HEPA) filter, also known as a high-efficiency particulate absorbing filter and high-efficiency particle collection filter, is an air purification material. HEPA filters were developed in the early 1940s and were originally used by the Manhattan Project to curb the spread of radioactive pollutants in the air. Over the next decade, HEPA was widely used commercially to eliminate viruses, bacteria, airborne fungi, pollen, human hair, and particulate matter (such as smoke particles, pet dander, and dust) from the air.

The HEPA filter is roughly divided into:
1. PP (polypropylene) high-efficiency filter paper
2. PET filter paper
3. PP and PET composite high-efficiency filter paper
4. High-efficiency glass fiber

Generally, the components of the HEPA filter are mostly made of chemical fiber and glass fiber. However, our filter is made of glass fiber, which is one layer after another of tight and irregular filter screens. After the airflow passes through the filter screen, it intercepts the particles in the air, thereby purifying the air. According to the United States Department of Energy (DOE, United States Department of Energy), the HEPA filter filters at least 99.97% of the airborne particles with a diameter of ≧ 0.3 micrometers (µm) (1/200 of the diameter of a hair). HEPA air filters are used in a variety of applications, including medical devices, automobiles, airplanes, and homes.

In EU(European Union) countries, this technical specification is usually presented as EN 1822:2009.by the European Committee for Standardization. According to the filtration effect of the most easily penetrating particle size(MPPS), the grades of HEPA filters are defined as follows:

Filter class Penetration(overall) Penetration(local)
E10 >85% ---
E11 (H11) >95% ---
E12 (H12) >99.5% ---
H13 >99.95% >99.75%
H14 >99.995% >99.975%
U15 >99.9995% >99.9975%
U16 >99.99995% >99.99975%
U17 >99.999995% >99.9999%