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- 【PERFECT FIT】: Premium Blue Pure 311 auto replacement fil-ters are compatible with Blueair Blue Pure 311 auto air puri-fier. (20.5 inches machine). NOTE: Not fit for 311 non-auto, not fit for 411 models
- 【2 LAYER FIL-TRATION】: 311 auto replacement fil-ters compatible with blueair 311 auto machine have 2-in-1 fil-tration systems. Particle Fil-ter attaching to up to 99.97% of airborne particles. Activated Carbon fil-ter take in pet odors and VOCs
- 【UPGRADED 311 FIL-TER】: Our 311 fil-ter is exclusively designed for compatible with Blueair Blue Pure 311 auto air puri-fiers. Using a 360-degree air intake and up to 4x the fil-ter surface area as the Genuine Blue Pure 311 auto
- 【SILENT TECHNOLOGY】: We deliver high-quality, durable and long-lasting replacements, allowing the fil-ter to last longer with a collapsible design. Compare to traditional HEPA fil-tration, we have a faster and quieter cleaning effect
- 【EASY TO REPLACEMENT】: 311 true HEPA replacement fil-ter is easy to replace. It is tested for compatibility and service life and suggested to replace your 311 fil-ter regularly about every 6 months when used 24 hours a day to keep its peak performance
