Non-commercial Air Purifier—The Effectiveness and Safety

Abstract

(1) Background: On the Internet, we can find the guidelines for homemade air purifiers. One of the solutions includes the use of a low-cost ozone generator to decrease the level of odors and biological contaminants. However, the authors do not notify about hazardous effects of ozone generation on human health; (2) Methods: We elaborated our test results on the bacterial and fungal aerosol reduction by the use of two technical solutions of homemade air purifiers. First, including a mesh filter and ozone generator, second including an ozone generator, mesh filter, and carbon filter. (3) Conclusions: After 20 min of ozone generation, the concentration of bacteria decreased by 78% and 48% without and with a carbon filter, while fungi concentration was reduced in the lower range 63% and 40%, respectively. Based on our test results, we proposed a precise periodical operation of homemade air purifier to maintain the permissible level of ozone for the occupants.

Control technologies to prevent aerosol-based disease transmission in animal agriculture production settings: a review of established and emerging approaches

“…During operation, bioaerosol continues to be sampled at pre-defined intervals of time for assay. The bioaerosol removal rate is reported as a function of time ( 216 – 218 ) and compared to a control test where the same procedure is repeated without the control technology. Such tests are particularly useful in testing upper-room UV devices ( 215 , 217 ), as they do not need to be confined in a duct HVAC system in order to operate.…”