【Perfect Compatibility】This 511i Max replacement filter is fully compatible with BLUEAIR HEPASilent Air Cleaner, Blue Pure F5MAX, and Blue Pure 511i Max models. Please verify your model before purchase; not compatible with other models. 【High-Efficiency Filtration】The H13 True HEPA filter captures 99.97% of particles as small as 0.1 microns, including smoke, dust, pollen, and pet dander, ensuring fresh air. 【Activated Carbon Filter】The activated carbon layer effectively removes household odors from smoke, pets, and cooking fumes, perfect for families with children and pets. 【Optimal Performance】For best results, replace the filter every 6 months. Easy to install with no tools required, ensuring seamless replacement. 【Long-Lasting Use】This filter combines HEPA and activated carbon for long-lasting performance, providing a healthier and fresher living environment. 【Cost-Effective】The package includes 2 Blue Pure 511i Max filters, offering great value for homes with multiple devices, enhancing air purification efficiency. This 511i Max replacement filter is fully compatible with BLUEAIR HEPASilent Air Cleaner, Blue Pure F5MAX, and Blue Pure 511i Max models. It features an H13 True HEPA filter that captures 99.97% of particles as small as 0.1 microns, including smoke, dust, pollen, and pet dander, ensuring fresh and clean air. The activated carbon layer removes odors from smoke, pets, and cooking fumes, making it ideal for families. With a recommended replacement every 6 months, this filter is easy to install, long-lasting, and cost-effective. The package includes 2 filters, providing excellent value for homes with multiple devices.