Amazon.com: BLUEAIR Blue Pure 411 Auto, 411, 411+ Genuine Replacement Filter, Particle and Activated Carbon, fits Blue Pure 411 Auto, 411 and 411+ Air Purifiers : Home & Kitchen
Blueair 203 HEPA Silent Air Purifier W/O Filter | eBay
Amazon.com: UOUOLONUN 2 Pack 200/300 Replacement Filter for Blueair 200 & 300 Series - Compatible with Blueair Classic 203, 270E, 303, 201, 250E, 215B, 210B, 205, 200/300 Series Filters : Home & Kitchen