Hartwell Vineyards - Napa, CA

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Wine Cave Mold Reduction Study - Summary:

A clinical study of the AiroCide PPT™ airborne pathogen killing technology was conducted in the wine barrel storage cave of Hartwell Vineyards, a boutique winery in the Stag's Leap district of Napa, CA. 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 cave of 72.3% in 23 days.


The cave used in this study was approximately 65,000 ft3 in volume . The AiroCide PPT™ system in the study consisted of three (3) ACS-100 units located throughout the caves.

The test period consisted of 21 days in July and August 2005. Baseline air samples were taken in the cave without the AiroCide™ units operating and were compared to Active On samples taken in the same locations after 48, 72 and 96 hours of AiroCide™ use as well as after 23 days of AiroCide™ use.

Air samples were taken with a slit air sampler (similar to the Anderson N6 sampler) on 15 x 100 mm plastic petri dishes. All samples were cultured on Potato Dextrose Agar plate by Aerotech Laboratories in Phoenix, AZ, and the results were measured in colony forming units (CFU) per cubic meter of air. All agar plates were exposed to 28.3 l/m of air for 3 minutes.


The table below shows overall airborne mold reduction inside the cooler of 72.3% in 23 days.

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