Blueair Blue Pure 411 Replacement HEPA Carbon Air Filter, 2-in-1, 1-Pack

This 2-in-1 replacement filter is designed for Blueair Blue Pure 411 air purifiers. The H13 True HEPA layer captures 99.97% of airborne particles as small as 0.3 microns, while the integrated activated carbon layer helps reduce unwanted household odors. For best results, replace the filter every 6 months depending on usage and air quality. This product is sold without manufacturer warranty