- Compatibility: 115115 filter replacement fits models C535, 115115, 5000, 5000B, 5300, 5300-2, 6300, 6300-2, C909, P300, 9000, WAC5300, WAC5500, WAC6300, AM90 - Why you need it: This replacement filter set provides multi layer purification to capture hair, household dust, pet dander and other dirt down to 0.3 microns, and to remove odors from pets, smoking, cooking and more. It helps your family enjoy cleaner, fresher air and increases overall living comfort - True HEPA filtration: The 115115 replacement filters are made of high strength HEPA material to ensure strong performance. They have a higher standard structure than many sub par filters, balancing effective filtration with steady air flow - Package contents and size: Includes 2 pieces 115115 HEPA replacement filters A and 8 pieces activated carbon filters. Dimension: H 16.3" x L 12.6" x W 1.2". This package offers comparable quality to the original at a favorable price when purchasing C535 replacement filters - Replacement tips: It is recommended to replace the H13 true high efficiency filters every 6-12 months and the pre-filters every 3 months to help protect your air purifier - Use scenarios: In a pet household with cooking odors to improve air quality in the living room; in small to medium rooms such as bedrooms or offices to reduce dust and odors; after remodeling or in environments with smoke or strong smells to maintain fresher air