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The Blue Pure 211+ Auto air purifier takes a simple approach to air quality with one-touch enabled Auto mode and customizable pre-filters in a lightweight, compact package. AHAM Verifide® for a Clean Air Delivery Rate of 353 cfm smoke, 380 cfm pollen, and 347 cfm dust. The ENERGY STAR® certified air purifier is best for large living and family rooms. Completely filters room air about every 12.5 min¹ (4.8x an hour at 550 ft²) on high.²​ Uses HEPASilent™ technology to deliver more³ clean air and remove 99.97% of airborne particles down to 0.1 μm, like pollen, dust, viruses⁴ and more. An activated carbon layer traps light odors.⁵​ Quieter than a whisper⁶ on low (23 dB), using less energy than a light bulb (4-38 W).⁷​ Fabric pre-filter in Arctic Trail (gray) included; Additional colors available for purchase. ¹Air Changes/Hour calculation is a product of recommended room size & average ceiling height over pCADR​ ²According to ANSI/AHAM AC-1 recommended room size​ ³Based on pCADR using GB/T18801-2015 standards comparing HEPASilent technology (mechanical + electrostatic filtration) vs. only mechanical filtration at same fan speed (RPM) & energy consumption (18.3 W) ⁴Air purifier is not tested against & Blueair does not claim to capture, remove, or kill SARS-COV-2 (COVID19)​ ⁵Based on GB/T18801-2015 test standards removal of formaldehyde & VOC​ ⁶Sound pressure according to GB/T18801 & GB4214.1​ ⁷Tested according to GB/T18801-2015 standard. "Light bulb" defined as a 40W LED light bulb