The Blueair Blue Pure 411 air purifier delivers high performance with one-button control and customizable pre-filter colors in a lightweight, compact package. Independently evaluated and third-party tested for performance as part of the AHAM Verifide~ Program for room air cleaners, this air purifier has a Clean Air Delivery Rate (CADR) of 105 cfm for fine smoke particles, 120 cfm for pollen particles, and 120 cfm for dust particles. Recommended for small rooms like nurseries, guest bedrooms, and home offices with a 360~ air intake to completely filters room air about every 12.5 minutes~ (approx. 4.8x an hour at 161 ft~) on the highest speed.~ The 3-step combination particle + carbon filter works with Blueair's HEPASilent~ filtration technology to remove 99.97% of airborne particles down to 0.1 microns, like pollen, pet dander, mold, bacteria, viruses~ and more, while an additional layer of activated coconut carbon traps light household odors.~ ENERGY STAR~ certified to consume less energy than an LED lightbulb (1.5-10 W)~ and quieter than a soft whisper on low speed (17-46 dB).~ Change color in seconds with five fabric pre-filter options. Includes two machine-washable fabric pre-filters in Diva Blue and Dark Shadow, additional colors Buff Yellow, Crystal Pink, Lunar Rock sold separately. The fabric material of the pre-filter catches larger particles and extends the life of the primary filter. Vacuum the fabric or toss it in the washing machine whenever it needs cleaning. At Blueair, our Swedish heritage inspires sustainability and quality at the heart of everything we do. All Blueair purifiers are AHAM Verifide~ for Clean Air Delivery Rate (CADR) and given a recommended room size, certified by ENERGY STAR for energy efficiency and the California EPA Air Resources Board (CARB) for safe ozone emissions. ~Air Changes per Hour (ACH) calculation is a product of recommended room size & average ceiling height over pCADR ~According to ANSI/AHAM AC-1 recommended room size ~This air purifier not been tested against & Blueair does not claim to capture, remove, or kill SARS-COV-2 (COVID19) ~Based on GB/T18801-2015 test standards removal of formaldehyde & VOC ~Tested according to GB/T18801-2015 standard. ""Light bulb"" defined as an LED light bulb with 40 W energy consumption ~Sound pressure according to GB/T18801 & GB4214.1

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