For optimal performance, we recommend replacing every 6 months. made a bar of light on the blue air, hazy with incense, one tenth of a mile long. The built-in LED warning system glows red when it's time for a change. 411 portico, pushed aside the heavy leathern curtain at the entrance. Some air purifiers have rules for placement, freely place anywhere in the room without compromising performance with the large 360° air intake. Remove household odours and gaseous pollutants such as smoke, VOCs, exhaust, smog, odours and airborne chemicals with activated carbon filters.įorget about adjusting settings and knobs - a single button controls it all and lets you know when it's time to replace the filter. Blueair Blue Pure 411 Vs Levoit Core 300 - Comparison 37,429 views 332 Dislike Share Save Air Purifier First 4.34K subscribers Clash of the similar air purifiers, but only one of. Removes 99.97% of airborne particles down to 0.1 microns - including pollen, dust, pet dander, mould, smoke, bacteria, microplastics and more with HEPASilent™ filtration technology. Blueair 211+ Vs Blueair 411 - Comparison (Smoke Box Test) Air Purifier First 5. Noise-levels no louder than a whisper on the lowest speed (17 dB) and equivalent to the noise level of a library on the highest setting (46 dB). *The Clean Air Delivery Rate, or CADR, is the amount of 100% clean air delivered by an air purifier every hour, showing how effectively it cleans the air, measured in cubic metres per hour (m³/h). It is usually tested with tobacco smoke (0.1-1 μm), dust (0.5-3 μm) and pollen (5-11 μm) to show the performance across a range of particulate sizes.