Philips HEPA + Active Carbon Filter AC4168 for AC4081
Healthy air, always
Healthy air protect alert warns you when to replace filter
Healthy air protect alert warns you when to replace filter Healthy air protect alert warns you immediately when it is time to replace the filter. When one of the filters is almost full and has to be cleaned or replaced, the Healthy air protect alert will remind you to replace or clean filter.
Healthy air protect lock ensures healthy air always
Healthy air protect lock function guarantees you healthy air always. It shuts off the purifier when healthy air can no longer be guaranteed. If the filter is not replaced promptly, the healthy air protect lock will shut off and lock the appliance to prevent secondary contamination due to a dirty filter. We guarantee healthy air always.
Filters out ultrafine particles >20 nanometers*
*In combination with the multi-care filter, the HEPA filter filters out ultrafine particles >20 nanometers including bacteria, dust, allergens and some viruses. According to publications of World Health Organization, the avian influenza, human influenza viruses and Legionella bacterium are larger than 20 nanometers.