The best air purifier you can buy today is the BlueAir Blue Pure 211+ Auto. It is the best choice for a large room, as it reduces particles by 0.3 microns at 18.0% (ambient) and 26.4% (clean) in Auto mode, and 6.5% (ambient) and 7.2% (clean) in Silent mode. In Dark plus Auto mode, with its primary PECO purification system turned off and its fan at the equivalent of a medium setting, it reduces them by 21.3% (ambient) and 18.0% (clean). The Levoit air purifier is also a great option, as it has a three-stage filtration system that includes a true HEPA filter, helping capture even the smallest airborne contaminants in rooms up to approximately 400 square feet.
It also has a precision laser sensor that accurately monitors particles in the room and automatically adjusts fan speeds as needed. Plus, it works at only 24 dB, making it incredibly quiet for bedrooms. It also has intelligent capabilities, including the Levoit app, which allows you to monitor air quality in real time, view filter life, and set schedules. The Coway-AP-1512HH air cleaner is another great choice, as it has sensors that can adjust fan speed to keep the air clean and an Eco Mode that turns off the air purifier when air pollution is low.
It also has a color coding system on top of the device that shows a blue light when the air is clean, purple to indicate pollution and red for high pollution. This air purifier is suitable for small room spaces up to 361 square feet, making it suitable for smaller spaces and bedrooms. The Blue Pure 221 was consistently better than all the other air purifiers we tested, despite its lack of Smart technology. At a level 6 setting, we found that the purifier removed 98% of particles smaller than 0.3 microns, 72% of particles smaller than 2.5 microns, and 73% of particles smaller than 10 microns.
At a level 10 setting, we found that the purifier captured 95% of particles smaller than 0.3 microns, 96% of particles smaller than 2.5 microns, and nearly 100% of particles smaller than 10 microns. The Levoit H132 is an affordable and compact size air purifier product for someone who wants to try their first air purifier at home. It is suitable for small to medium sized rooms and captures 99.7% of particles smaller than 0.3 microns, 99.5% of particles smaller than 2.5 microns, and 100% of particles smaller than 10 microns in a Level 2 setting; and 99.9% of particles smaller than 0.3 microns, 99.6% of particles smaller than 2.5 microns, and 100% of particles smaller than 10 microns in a Level 3 setting. Finally, the KOIOS EPI810 is the smallest air purifier we've ever reviewed and is lightweight enough to take on the road. While it doesn't have all the features of a smart air purifier, it absorbs an impressive 99% of particles measuring 10 microns but only 52% of particles smaller than 2.5 microns.