Let’s clear the air. Blueair genuine filter for Blue Pure 311i Max air purifier. Blueair genuine Blue Pure F3MAX Replacement filter for 311i Max is designed for optimal performance. Not compatible with Blue Pure 311i+ Max and 311 Auto.

The Blue Pure 311i Max SmokeBlock Replacement Filter is the ultimate tool against wildfire season. Additional activated carbon removes 99.99% of wildfire smoke* along with extra protection against other wildfire emissions such as toxic gasses, smog and odors** while also eliminating harmful gaseous pollutants such as volatile organic compounds (VOCs). In addition, advanced polypropylene filter media removes particle pollutants down to 0.1 micron in size from your indoor air, such as pollen, dust, and pet dander. Using a 360-degree air intake and up to 4 times the filter surface area vs. the same models with only mechanical filtration (H13 filter), the Blue Pure 311i Max SmokeBlock filter lasts longer, on average 6 months. Subscribe & save up to 10% on auto-delivered filters when replacement is needed; We recommend replacing your filter about every 6 months depending on usage. ULTIMATE TOOL AGAINST WILDFIRE SEASON: 99.99% wildfire smoke removal based on removal testing of particles 0.4-0.7um in 60min in a 30m3 room. Performance may vary. Also tested on benzene, toluene, nitrogen oxide, sulfur dioxide. FILTERS BUILT TO LAST: Blueair models with HEPASilent's mechanical and electrostatic filtration produced higher CADR, lower noise, and had lower energy consumption vs. the same models with only mechanical filtration (H13 filter).

Genuine Blueair replacement filter compatible with the Blue Pure 211+ and Blue Pure MAX models only. This filter is not compatible with the 211+ Auto model. If used with the Blue Pure 211+ Auto, the clean air delivery rate (CADR) will decline.​ The Combination Particle + Carbon filter protects against both gaseous and particulate contaminates. Advanced polypropylene filter media removes particle pollutants from your indoor air, such as pollen, dust, and pet dander. At the same time, a layer of activated carbon mesh traps light household odors from pets, cooking, smoke, and more. The 360-degree design allows the filter surface area to be over 20 square feet in size. ​ Unlike look-a-likes, authentic Blueair replacement filters are designed to maintain premium performance over time and ensures your warranty remains intact. For optimal performance, replace the filter about once every six months when used 24 hours a day. The twist-and-change filter is easily removed and replaced and is recyclable at the end of its service life. Please check your local recycling facilities for availability.