Compatible Model: Genuine HEPA air purifier filter replacement is ONLY compatible with Blueair Blue Max 3350i and Blue Pure 311i Max air purifiers (Please confirm your machine model before purchasing!).
Value Pack: Package 1 includes a replacement filter pack. Easy to install, snaps into place, no tools required.
Filtration System: A high-efficiency filtration system featuring a high-quality True HEPA filter and a high-efficiency activated carbon filter. The True HEPA filter can capture larger airborne particles such as dust, hair, pet dander, and more. The activated carbon filter can also capture larger airborne particles and absorb peculiar odors such as smoke, pet-specific odors, and more.
Replacement frequency: To ensure efficient operation of the air purifier, it is recommended to replace the filter every 4-6 months. Remove the filter from its plastic packaging and then place it in the air purifier.