Creating a better home environment. This 4-in-1 Air Cleaning System is more than just a filter. Multiple levels of cleaning include HEPA, UV-C and charcoal to help improve indoor air quality. Why UV-C Light Technology? Hospitals use UV-C light to sanitize. UV-C light is proven to kill germs on surfaces, in the air, and water. It is highly effective at penetrating thin-walled germs and bacteria and altering their genetic structure so they die. Why True HEPA Filtration? Common household allergens can trigger an allergy or asthma attack. HEPA filters trap 99.97% of particles down to .3 microns in size, reducing the airborne allergens in your home. The CADR (Clean Air Delivery Rate) displayed on the product carton may not match the ratings on our website. Please refer to the manufacturer website for the most accurate ratings. In an effort to stay up to date with Energy Star Version 2.0 testing requirements, CADR ratings on the manufacturers website reflect the test results of product manufactured after 10.16.20.