Nispira 3-In-1 Activated Charcoal HEPA filter replacement compatible with HoMedics Air Purifier AF-20 AP-25 AR-20 Filter Compared to the original part number AF-20FL AP-25CRF AF-25. 2 filter will be included. Dimension: 13.2" x 11.8" x 1.1". Suggest replacing the filter after 6 - 8 months use to optimize the performance. This product meets or exceeds leading national brand' quality. Nispira 2-In-1 True HEPA filter replacement compatible with HoMedics Total Clean AF-20FL Fits AF-20 AP-25 AR-20 Air Purifiers. Compared to the original part AP-T10. Preliminary filter helps extend HEPA filter life span by preventing hair, dust and debris from entering the machine. 2 filters will be included. Dimension: 13.2" x 11.8" x 1.1". Suggest replacing the filter after 6 - 8 months use to optimize the performance. This product meets or exceeds leading national brand' quality