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Air filter is a device made of fibers or porous materials that can remove solid particles such as dust, pollen, mold, and bacteria from the air, and filters containing adsorbents or catalysts can also remove odors and gaseous contaminants.

Surveys have shown that office air pollution is 2 to 5 times higher than that of the outdoors, and 800,000 people die every year from office pollution. The sources of office air pollution can be divided into three parts: first, pollution from office equipment, such as computers, photocopiers, printers, etc.; second, from the office decoration materials, such as coatings, paints, plywood, particleboard, composite boards, etc.; Third, pollution from the body's own activities, including the pollution of smoking and the pollution generated by the body's own metabolism.

The national standard GB/T 18801-2022 <Air Purifier> was released on Oc. 12, 2022, and will be implemented on May 1, 2023, replacing GB/T 18801-2015 <Air Purifier>. The release of the new national standard puts forward higher requirements for the quality of air purifiers, and also plays an important role in the development of the air purification industry and the standardization of related enterprises’ production. The following will analyze the changes between the old and new national standards to help you quickly understand the main revisions of the new national standards.