【PRECISE COMPATIBILITY】Specifically engineered to seamlessly fit for Blueair Blue Pure 211i Max Air Purifier, this replacement filter, coded as F2MAX, guarantees perfect compatibility. Please ensure your model number matches before purchase, as it's exclusive to the 211i Max series and not compatible with 211+ or 211+ Auto models. 【ADVANCED FILTRATION】Certified with H13 True HEPA technology, this filter achieves an impressive 99.97% efficiency in capturing particles as small as 0.1 microns, tackling pet dander, pollen, and dust with precision. Additionally, its activated carbon layer effectively eliminates various household odors, ensuring a fresher indoor environment. 【OPTIMAL LONGEVITY】Maintain peak performance for your 211i Max Air Purifier by replacing the filter within 9 months based on usage. The installation process is straightforward and tool-free, allowing for hassle-free replacement to sustain superior air purification. 【DEDICATED CUSTOMER SUPPORT】At our establishment, we prioritize customer satisfaction. Any queries or concerns regarding our product will be promptly addressed by our dedicated support team within a 24-hour window. We value your trust and aim to deliver both premium quality filters and exceptional service to meet your needs effectively. 【ENSURE PEAK PERFORMANCE】Rely on our top-notch replacement filters to maintain your Blue Pure 211i Max Air Purifier's efficiency, providing you with cleaner, healthier air and a more pleasant living space. Should you require assistance or have inquiries, do not hesitate to contact us – we're here to assist you at any time. 211i Max Replacement Filter Compatible with Blueair Blue Pure 211i Max Air Purifier. Blue Pure F2MAX, 3-in-1 H13 Ture HEPA and High-Efficiency Activated Carbon Filters