The MinusA3 Air Purifier has a six-stage filtration and deodorization process. It includes the BioGS HEPA filter, which targets the smallest, dirtiest particles through the use of an advanced and proprietary fiber material. An activated carbon filter reduces VOCs and odors, and custom filter options (germ defense, pet allergy, odor remover, and toxin absorber) can tailor the system to specific environmental needs. The intelligent tracking system reminds users to clean and replace the filters. Smart sensors adjust filtration power according to indoor air quality, and the “all lights off” feature reduces light pollution.