Odors Eliminated Destoys Viruses, Mold, Mildew and Bacteria Industrial Strength Build - No Plastic ZENTOX PURE AIR: The original PCO patent holder. Invented, Designed and Manufactured in the US PET FRIENDLY: The same harmful airborne viruses and bacteria that affect humans can be harmful to your pets. Zentox Pure Air Systems have shown the ability to mitigate airborne transmission of difficult to disinfect viruses and bacteria. Safe To Use: No Ozone, no harmful air contaminants are emitted. SIMPLE OPERATION: No pairing, no WIFI, no Bluetooth, just turn it on and let it run 24/7 to insure a constant flow of pure air. A continuosly variable speed fan allows an optimum setting. H5N1: Research by the Public Health Agency of Canada has shown that Zentox Pure Air systems have the ability to destroy airborne H1N1 virus, remove variable types of microorganisms, spores, vegetative bacteria, mycobacterium, RSV and negative stranded viruses like H5N1 in a matter of minutes.