A clinical study of the AiroCide PPT airborne pathogen killing technology was conducted in the wine barrel storage room of Chateau St. Jean. Founded in 1973 and now owned by Foster's Group, Chateau St. Jean is a wine making estate located at the foot of Sugarloaf Ridge in the Sonoma Valley near Kenwood, California. The data supports the hypothesis that airborne mold levels would be lowered after 21 days of continuous operation of the AiroCide PPT system. The results show an average airborne mold reduction inside the storage room of 57% in 23 days.