Honeywell HEPA Air Purifier Filters are fully capable of capturing an astonishing 99.97% of airborne particles at 0.3 microns from any air passing through the filter. This HEPA filter is compatible with the HPA020 Series, HPA030 Series, HPA075 Series, HPA080 Series, HPA175 Sereis and HPA180 Series. It is highly recommended that you change this HEPA air filter annually for optimal performance. Establish an unrivaled breathing experience for yourself and your loved ones with Honeywell HEPA Filters.