- Superior Compatibility: The Classic 400 Series Dual Protection Filter Replacement is designed specifically for BLUEAIR Classic 400 Series Air Cleaner Purifiers, including models 480i, 402, 403, 405, 410, 450E, and 455EB. Please verify your machine model prior to purchase to ensure proper fit. - Enhanced Air Quality: Featuring a True HEPA filter, this replacement effectively captures dust, pollen, pet dander, and other airborne particles, ensuring that you breathe cleaner, fresher indoor air. The activated carbon filter works to eliminate a variety of household odors from pets, cooking, smoking, and volatile organic compounds (VOCs). - Simple Installation: Replacing your filter is straightforward; just remove the old filter and insert the new one. For optimal performance, it is recommended to replace the filter every 8-12 months, or more frequently depending on usage and environmental factors. - Value Package: Each package includes two 400 Series Replacement Filters, crafted from high-quality materials to extend the lifespan of your air purifier, providing long-term value and efficiency. - Practical Use Scenarios: Ideal for homes with pets to minimize dander and odors, for allergy sufferers seeking relief from airborne allergens, or for kitchens where cooking smells linger. This filter replacement ensures your living environment remains clean and comfortable.