SIMPLE ONE-BUTTON CONTROL: Easily adjust fan as-needed with one button to ensure optimal air quality, including lowering fan speed at night for uninterrupted sleep CLEAN AIR IN MINUTES: Blueair's HEPASilent technology, delivers clean air, faster, and much more quietly than traditional HEPA filtration alone; Quickly cleans 540sqft large room in about 12.5 min or up to 2592sqft XL space in 60min, on high ONE OF THE QUIESTEST AIR PURIFIERS: Quieter (31 dB) than whisper on low; ENERGY STAR rated - uses less energy (30W) than an incandescent lightbulb on low COMBAT ALLERGENS: Helps reduce allergens and pollutants that trigger allergy and asthma symptoms REMOVES ODOR & PARTICLES DOWN TO 0.1 MICRON: Ideal for smoke & smog during wildfire season; Removes 99.97% of airborne particles like smoke, dust, viruses and pet dander, while the carbon filter traps light household odors from smoking, pets and cooking MOST AWARDED AIR PURIFIER BRAND IN THE US: Blue Pure 211 plus has won Good Housekeeping – 10 Best Air Purifiers of 2021, Best Overall Air Purifier; Wirecutter Pick - The Best Air Purifier - 2019 - 2022 INDEPENDENTLY TESTED FOR PERFORMANCE & SAFETY, ZERO OZONE: AHAM Verifide for CADR; Ozone Safety Standards Certified by CARB; Zero Ozone Verified (<5 ppb) by Intertek Sustainability Program; Trusted Education Partner of British Health Professional Academy GENUINE FILTERS FOR OPTIMAL PERFORMANCE: Replace your filter every 6 months to ensure proper functionality & only use genuine Blueair filters; Shop 211 plus replacement filter: B073SKH39W; Upgrade to SmokeBlock filter for enhanced removal: B0B453ZDZ6. A 360-degree air intake means you can place the 211+ almost anywhere without compromising performance. Combine this with its compact and lightweight design, and you have an air purifier that is easy to move and place wherever suits you.