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Bluezone is Science that keeps your spaces safer and your foods fresher. Bluezone by Middleby is air purification that finally works. Bluezone uses the precise balance of ultraviolet-enhanced oxidation between 185nm and 254nm to destroy airborne contaminants, such as odors, mold, bacteria, and viruses. Bluezone does not rely on mechanical filtration. Instead, Bluezone scientists have maximized the flow rates and residence time through the Bluezone unit in order to get kill rates between 99.9% and 99.9995% depending on contaminant and unit type.