Certification
The sanitising efficiency of the Block device has been tested and certified.
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Laboratory Tests and Results

Microbiological count reduction test

The tests carried out demonstrate the suitability and absolute effectiveness of UVC ray technology in reducing the bacterial and fungal count in enclosed spaces.
-40%
fungal count
-25%
aerobic micro-organisms
The tests carried out are particularly useful in highlighting the effectiveness of n.a.n.e: devices in contexts such as school classrooms, environments in which the bacterial concentration at the start of the experiment continuously increases due to the presence of a certain number of people.
HOW IS MONITORING CONDUCTED
Environmental microbiological monitoring is carried out by checking both the air and work surfaces. The monitoring methods used to establish the bacterial count on solid and liquid surfaces are able to identify only the metabolically active vital microbial share that can reproduce and form visible colonies. The level of microbial contamination is expressed in terms of Colony Forming Units (CFU) per cubic metre of air.
RESULTS
Microbiological concentration values are lower than they were initially and fall into a very low microbiological pollution category. These percentages would significantly increase if they related to the maximum concentration recorded in a classroom following a day of lessons.
Totem and Mini-Totem are clearly effective, as the devices significantly reduce the number of air-dispersed pollutants, thus improving air quality and reducing the biological risk, also of the new coronavirus.
EXPERT ANALYSIS
“The system developed by Maletti Group is perfectly fit for purpose. Using Totem does not just contain the microbiological count but significantly reduces it. [...] Backing up these results, a recent publication has, for the first time, demonstrated the effectiveness of UVC rays in reducing the viral load of coronavirus dispersed in the air.”
Prof. Cataldo Arcuri, PhD
Department of Experimental Medicine, Università degli Studi di Perugia