Air400 Filter Replacement for Bissell Air400, 2 True HEPA and 2 Carbon Filter with 8 Pre-Filter, Compared to Part #2521,2520,3365

Compatible with Bissell Air400 Air Purifier 2479 and 24791 models. | Value Pack Includes 2 H13 HEPA filter(part #2521), 8 pre-filter and 2 activated carbon filter(part #2520). | H13 True HEPA filters out fine particulate, Pre-Filter filters out larger particulate in the air, like hairs, pet fur, lint and prolong the life of HEPA filter. | Activated carbon filters utilize physical adsorption to help reduce common household odors and airborne chemicals, including those from smoke and cooking emissions. | It is recommended to replace the HEPA filter every 6-12 months and to replace the pre-filter and carbon filter every 3-6 months.