Complies in dimensions, design and performance to the Philips Nanoprotect FY2422/30 suitable for the Philips air purifier series 2000 and 200i, AC2889/10, AC2889, AC2887, AC2882 HEPA filter, as the original. Filters particles up to 0.02 µm from the air. Important: Please note: Important: An information about the "service life": your air purifier does not have a sensor for "filter full". After a certain number of hours of operation and depending on the fan speed, your device will display the message "Filter full" - regardless of how full the filter actually is. So if your air purifier "fully displays filter" sooner than expected, either the filter indicator has not been reset properly or it has been used more intensively than the last time. Sincerely, Tecon Shop