2 Pack 411i Max Filter Replacement for Blueair Blue Max 3250i Air Purifier

Compatible Model: This filter replacement is compatible with Blueair Blue Max 3250i / 3250 auto/Blue Pure 411i Max and 411a Max Air Purifier Filter, Part Number# F4MAX. Please confirm your machine model number before purchasing
2-in-1 Filtration System: The 411i Max Filter features an exceptional three-stage filtration system: ① H13 True HEPA Filter ② Activated Carbon Layer. This filter can effectively improve the air quality in your living space and create a healthier daily environment for you.
Excellent H13 True HEPA Filter: The 411i Max Filter HEPA filter can clean up 99.97% of particles 0.3 microns in size. activated carbon filter helps clean up dust, pollen, odors, smoke, cooking smells. H13 True HEPA Filter and Activated Carbon Filter work together to improve your air quality. compared to other filters, our one is higher cost-effectiveness.
Replacement Frequency: To maintain its peak efficiency, It is recommended to replace the filter every 6-8 months, the specific re