Krueger's PAC series of portable air cleaners are self-contained, high efficiency particulate air (HEPA) filtration systems designed to easily and economically create a negative pressure isolation room/environment that will meet OSHA and CDC TB (tuberculosis) guidelines. As such, it is a solution for applications where patients are known or suspected of having TB, SARS, COVID-19, or other infectious diseases. Alternatively, these units can be used as a positive pressure, clean air recirculating systems, making them a great choice for schools, conference rooms, clinics, and other confined areas where particulate reduction is required.