Compatible with Bissell Air400 Air Purifier 2479 and 24791 models.
Value Pack Includes 1 H13 HEPA filter(part #2521), 4 pre-filter and 1 activated carbon filter(part #2520).
H13 True HEPA filters out fine particulate, Pre-Filter filters out larger particles 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.
