This HEPA filter works with your air purifier to filter out allergens and airborne particles in a 177 sqft area 4.8 times per hour. It captures between 99.97% and 99.99% of inanimate allergens and particles such as pollen, household dust, pet dander, dust mite debris, and more down to 0.3 microns in size. PureAir® HEPA filters work with your unit to help freshen the air by capturing airborne particles. The cylindrical filter boasts an enormous surface area which means a larger capacity to capture more particles over time while delivering an exceptionally high volume of air circulation. Change your filters regularly. A delay in filter replacement can limit airflow, causing a reduction in the performance of your air purifier. The Frigidaire Wellbeing App will send alerts, notifying you of the filter status and when it is time for replacement.