- The HEPA filter (High Efficiency Particulate Air Filter) ensures the best-possible reduction in pollutants\n- 99.97% of the particles > 0.3 micrometers are trapped by the filter\n- Change once a year. Check the HEPA filter from time to time. Early filter replacement is recommended in the case of obvious discolouration (brown or grey) or visible blockages\n- Easy filter replacemen\n- Use: Air cleaner P2261