The Classic 400 Series filters minimize allergy triggers, viruses, and bacteria for a healthier home environment with high filtration efficiency. Together with HEPASilent™ filtration technology, our particle filters remove 99.97% of airborne particles down to 0.1 microns, including pollutants such as pollen, dust, pet dander, mold spores, viruses, bacteria, fine smoke particles and more. This filter is compatible with the following Classic family models: 402, 403, 405, 410, 450E, 455EB, 480i.

• HIGH EFFICIENCY FILTER: The Classic 400 Series Particle filter provides protection against odors, chemicals, gases and 99.97% of airborne pollen, dust and germs.
• HEPASilent™ TECHNOLOGY: HEPASilent™ technology combines electrostatic and mechanical filtration to capture tiny airborne pollutants like pollen, dust and smoke, faster and quieter than traditional HEPA filter.
• PREVENT BACTERIA AND MOLD: Filter fibers resist bacteria and mold growth, to ensure you'll never put bacteria and mold back into the air.
• EASY REPLACEMENT: To replace your filter (about every 6-12 months), start by unplugging the air purifier. Open the back door to remove the old filter and vacuum away any dust on the inside. Insert the replacement filter, close the back door, and plug back in. Easy.
• PREMIUM FILTERS: Unlike generic look-a-likes, genuine Blueair replacement filters are specifically designed to maintain superior performance over time. We recommend changing your filter about once every 6-months when used 24 hours a day.

Compatibility: 400 Classic Series