Ozone-free: Air purifiers avoid using UV-C light, which is an air cleaning method that may produce harmful ozone and secondary pollution according to research. High performance: You can enjoy fresh air in a few minutes by using the air purifier. Using VortexAir technology and 360 air inlet, it can clean up to 547 square feet in 30 minutes and 219 square feet in 12 minutes (CADR: 141 cfm/240 m/h). Only products weighing more than 6 pounds (about 2.7 kilograms) can be equipped with such a powerful