HEATDAZ Genuine Air Purifier Replacement Filter for HEATDAZ 4866 Air Purifer, Enhanced Version.Different from the standard version, the HEATDAZ enhanced filter is covered with a layer of electrostatic cotton and the activated carbon content in the filter is higher.The service life of the Genuine morento HY4866 air purifier filter is generally 2200 hours,Recommend you to replace the filter each 3-6 months, Please replace the filters according to its service life.