Compact air purifier with Wi-Fi connection The new generation of Blueair's incredibly popular and beloved air purifiers in the Classic family is compact and efficient, with an elegant and discreet design. With an elegant and award-winning metal design, Blueair Classic 405 does not require much space to deliver high cleaning power (CADR 510 m3/hour). Classic 405 is perfect for larger bedrooms, compact living rooms and smaller offices.   HEPASilent particle filter Classic 405 PA uses Blueair's unique HEPASilent technology, which captures up to 99.97% of airborne particles up to a size of 0.3 micrometers. This advanced filter captures virtually every particle present in the air: pollen, dust, pet dander, mold spores, allergens, viruses, and bacteria — and 99% of all PM2.5 particles. Enjoy clean, healthy air that is 99.97% pollution-free. Note: The Classic PA comes with a particle filter. If you have problems with odors and gases, we recommend the Classic 405 SM SmokeStop filter with activated carbon for the best results.   Quiet in operation By using a unique combination of electrostatic and mechanical filtration, Blueair filters can use less dense filter media while maintaining high filtration efficiency. This means that less effort is required to push the air through the filter, resulting in high-quality performance at all speeds and near-silent operation. The products are also certified with EnergyStar, which means minimal power consumption.   LED symbols Clear LED symbols allow you to see the status of the Wi-Fi connection, fan speed and when you need to replace the filter (after 6 months of use, or 4,380 hours). Blueair 405 is Wi-Fi compatible for easy remote control via smartphone or tablet.   Blueair Friend app With the Blueair Friend app, you can control functions on your Blueair Classic 405 such as fan speed, LED intensity, child lock and night mode. Blueair Friend can be downloaded for free from the App Store or Google Play.   Best tested The independent Scandinavian testing institute Testfakta rates the Classic 405 with the highest overall score, 8.4 out of 10 for the highest air purification performance at both low and maximum power. The test included 10 air purifiers in Scandinavia, United Kingdom, Germany, Poland and the Netherlands.   Recommended by Asthma Allergy Nordic* Blueair Classic 405 is recommended by Asthma Allergy Nordic for people with asthma, allergies and respiratory problems. The recommendation applies to Classic 405/480i with speed 2, maximum room size 40m2. * Asthma Allergy Nordic is a collaboration between the asthma and allergy organizations in Norway, Sweden and Denmark. A new label that makes it easier for customers to find carefully selected, soft products.   Features of the.