Improve the air quality in your home or office with the Homedics True Hepa Replacement Filter, capable of eliminating airborne allergens as small as 0.3 microns at an impressive rate of up to 99.97%. This filter features a built-in prefilter to capture larger particles and an activated carbon odor filter to help reduce pet smells, household odors. To ensure optimal performance, it's recommended to replace the filter every 12 months. Specifically designed for use with the Homedics Smart Console Air Purifier, Ap-C500.