True HEPA – High Performance and compound HEPA filter net, with removal rate as high as 99.99% and above. Can remove the particles with the diameter of 0.25 microns. It is specialised in dust removal and inhale-able particle absorption up to European standard and has exceeded environmental air quality standard of PM2.5. Excellent dust collection could prevent dust pollution in lungs and remove dust risks. Removes 99.97% allergens and bacteria spread in air, such as dust, smoke, pollen, pet hair, bacteria and mycetic spores. Activated carbon could powerfully absorb and solidify as well as crystallize, further removes toxic substances such as benzene and other peculiar smells. It can also stop secondary pollution caused by thermal desorption of pollutants.