I recently shifted to South Korea to pursue higher studies and stay with my sister and niece . My niece is working on a high school project on air pollution and indoor air quality studies . Starting with a write up on air pollution and then indoor air quality and effects on health and the remedies . There is a small section on air purifiers and the latest technology where she has uploaded details about this particular Korean brand which we use at home which has some new technology http://go-clair.com/. She thinks I'm a know it all person and is asking me about details on air purifier fan sizing . This particular air purifier has some e2f filter which is different from the other HEPA air purifier filters I looked up online . Few Korean products are notches above in technology and I need to refer the Korean google/Naver which gives results in Korean and later uses Google translate . Can someone save me this cumbersome process take a look at this website and give me a simplified air purifier fan sizing calculation for this particular Clair air purifier ?