ABSTRACT
This article aims to present the efficiency evaluation of the ozone gas concentration generation by the commercial ozone generator for disinfection in residential buildings during the COVID-19 pandemic. The objectives of the research are 1) to evaluate the efficiency of the ozone gas concentration generation by the ozone generator available in the market;and (2) to determine its appropriateness. The 2 gram/hour ozone generator was placed near an air-conditioner for 60 minutes following the instructions of the manufacturer. Then, the ozone concentration measuring devices were developed using the Winsen® ZE14 ozone sensor, which display the results in LCD screen, save them in a micro-SD card in the form of an Excel file (.xlsx). The devices were then placed at 3 positions;4 meters, 8 meters, and 12 meters of the generator. Finally, the data of the ozone concentration collected from each position was processed and analyzed. The results revealed that (1) the 2 gram/hour commercial ozone generator was able to neutralize the pathogens (0.5 ppm in 5 minutes);and (2) the disinfection was appropriate for the 348 m3 room. Using it in larger room reduces its efficiency of disinfection. In conclusion, it is crucial to select the generator by considering its capacity and the size of the room for the highest efficiency according to the standards. The generator can be used assuredly and efficiently to disinfect and reduce the risk of infection. © 2022 IEEE.