【Fully Compatible】: The 311i+ Max filter fully compatible with Blueair Blue Pure 311i+ Max air purifiers, compare to part No. F3MAX+. NOT compatible with Blue Pure 311i Max/ 311 Auto/ 311 (Non-Auto) air purifiers, please confirm your machine model before order. 【HEPA Air Filter】Our 311i+ Max replacement filter made of HEPA air filter and a high-efficiency activated carbon filter for good clean filtration and performance. It's can attach most airborne particles, like dust, pet dander, pollen, household odors from smoking, cooking and pets. 【High Efficiency Filtration】This 311i+ Max air filter are capable of attaching 99.97% of airborne particles 0.3 microns, and the carbon filter helps you solve the problem of unpleasant odors, so no need to worry about any air problems anymore, just enjoy a healthy life with your family. 【Cost-Effective】Package includes 2 Pack F3max+ replacement filter for 311i+max. Keep a close eye on your filter life, it is better to replace filter every 6-9 months for optimal performance depending upon your usage and environment. 【Shop With Confidence】isinlive adhere to provide all customers with the best customer service experience. If you have any quality problem for Blueair 311i+ max replacement filter during usage, please contact isinlive customer service team. Filter made of FSC-Certified paper Compatibility:
Compatible with Blueair Blue Pure 311i+ Max Air Purifiers

Item: 311i+ Max Air Purifier Replacement Filter
Compare to Part No.: F3MAX+

3-in-1 HEPA Filter
1)Pre-filter (Not Included): Attach hair, lint, pet fur and other large particles.
2)HEPA Filter: Attach pollen, pet dander, dust and other particles as small as 0.3 microns.
3)High-Efficiency Activated Carbon Filter: Absorbs household odors from pets, cook, smoke.

Replace Regularly:
It’s better to replace your F3max+ replacement filter for Blueair Blue Pure 311i+ Max air purifier every 6-9 months, to keep at peak performance

What’s in the Box:
311i+ Max Replacement Filter x 2 Pack