Developed by NASA engineers, The AiroClean420 works by continuously processing your contaminated air through a patented Bio-Conversion Reactor. This product is a safe alternative for pesticides! and effectively removes naturally occurring pest such as - Powdery Mildew, Gray Mold/Botrytis, Downey Mildew, Blight, Bacteria, Viruses, Allergens, and VOC's. They are mineralized through the AiroClean 420, in result leaving exit air 99.999987% contaminant free! No..