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. Although the Blueair Classic 280i is small and can be easily moved around the house, don't be fooled by its size: the quality is excellent and the surface area of the filter is large. The Classic 280i is perfect for compact spaces such as bedrooms and smaller apartments.   HEPASilent particle filter Classic 280i 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 280i SM SmokeStop Filter with activated carbon for best results.   Built-in sensors With the intelligent air sensors in Blueair 280i, you can measure, control and be aware of indoor air quality. The sensors detect air pollution such as airborne particles, gases, volatile organic compounds and carbon dioxide. You can also receive real-time information about temperature and humidity on your smartphone/tablet. The sensors measure: - Temperature - Humidity - Hundreds of different types of ultra-small particles in the air (PM 2.5) - Volatile organic pollutants (VOC) such as paint solvents, perfumes, detergents, formaldehyde and benzene - Carbon monoxide (CO²) (equivalent based on VOC level) Quiet in use By using a unique combination of electrostatic and mechanical filtration, Blueair filters can use less dense filter media while maintaining a high level of 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 280i is Wi-Fi compatible for easy remote control via smartphone or tablet.   Blueair Friend app With the Blueair Friend app you control functions on your Blueair Classic 280i 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.   Features of the Classic 280i PA:.