Bluezone® by Middleby offers a patented solution to kill viruses, bacteria, mold, and other contaminants in indoor spaces. Te ... sted and proven by the U.S. Military, it utilizes ultraviolet-enhanced oxidation technology to purify air instead of capturing and concentrating airborne contaminants in a particle filter or activated carbon. Applications include indoor dining and food preservation in walk-in refrigerators or coolers. read more