This revolutionary technology developed by NASA is FDA-listed as a Class II Medical Device and is the first filterless technology of its kind. Unlike traditional air filters, Airocide destroys airborne organic matter, instead of trapping them. Airocide even eliminates the smallest of gases that not even the best HEPA filters can tackle. All Airocide units utilize the same NASA developed technology and handle any size room in your home. For best results, Airocide recommends placing a single unit in your master bedroom in order to create a near ideal breathing environment while you sleep. Customer’s comment feeling better, waking up refreshed and breathing easier.