The COVID-19 pandemic forced the accessibility, social gathering, lifestyle, and working environment to be changed reduce infection. Coronavirus spreads between people in several different ways. Small liquid particles (aerosols, respiratory droplets) from an infected person are transmitted through air surfaces that contact with humans. Reducing transmission modified heating, ventilation, condit...

Ultraviolet germicidal irradiation (UVGI) uses UVC radiation produced by low pressure Hg vapor lamps to control biological air contaminants. Lamp UV output depends on multiple factors, including accumulated operating time (age) and the thermal effects of ambient air temperature and velocity. Additionally, the life of some lamp types depends on the frequency of on-off cycles. Models of lamp life...

The present paper is a review on methods and technologies for air cleaning from micro organisms and viruses, which are applicable with the present HVAC practices. The advantages and the drawbacks of air dilution, filtration (HEPA, ULPA), ultraviolet germicidal irradiation (UVGI), photocatalytic oxidation (PCO), plasmacluster ions and other technologies for air disinfection and purification is c...

Tuberculosis and in some cases, flu, colds other airborne diseases. Since research is one of the biggest concerns causing influenza pandemics, most surrounding aerosol contamination revolves around environmental influences on virus. Many literatures suggest that transmitted primarily through close contact, such as exposure to large respiratory droplets, direct mouth-to-mouth contact short-term ...

The high demand for N95 masks, especially during the COVID (Coronavirus disease)-19 pandemic, has caused shortages worldwide. This study aimed to examine sterilization ability of portable sterilizer prototype masks and its effect on filtration changes in air resistance mask order thrift personal protective equipment (PPE) use a shortage. sample used was an type 1860. contaminated with 0.6-0.8 M...

The global pandemic of coronavirus disease 2019 (COVID-19) has posed a serious threat to human society on both perspectives health and economy. Ultraviolet (UV) been verified capable damage the DNA RNA various microorganisms, including new coronavirus. parabolic reflector, key component upper-room ultraviolet germicidal irradiation (UVGI) device, plays vital role in collating restraining light....