BLUEAIR Blue Pure 311 Auto Genuine Replacement Filter, Particle and Activated

BRAND NEW - OPEN BOX COMPATIBLE WITH BLUE PURE 311 AUTO: Blueair Combination Particle + Carbon Replacement Filter compatible with Blue Pure 311 Auto Air PurifierFILTERS BUILT TO LAST: Using a 360-degree air intake and up to 4x the filter surface area the Genuine Blue Pure 311 Auto Particle and Activated Carbon Filter lasts on average 6 months to a year; optimizing air flow and performance over timeAUTOMATED FILTER REPLACEMENT: Subscribe & save up to 10% on auto-delivered filters when replacement is needed; We recommend replacing your filter about every 6 months when used 24 hours a dayREMOVES EVEN TINIEST AIRBORNE PARTICLES DOWN TO 0.1 MICRON: Particle filter removes airborne particles such as pollen, pet dander, bacteria, mold, viruses, and dust from your indoor environment* ideal for everyday use. top-grade materials and excellent craftsmanship ensure long-lasting durability.