HEPA filter for air purifier Q34P and other similar devices. dimensions: 34.9x20.3x4.2cm filter class: HEPA H13 (filtration efficiency 99.95%) Filter removes: suspended particles PM1, PM2.5, and PM10 – the main component of smog plant pollen particles – i.e., plant allergens mold and fungus spores dust and its mites animal fur – which is the main carrier of allergenic proteins viruses and bacteria