| Technologies for controlling respiratory disease transmission are analyzed in a model ten story building. Mathematical models of HEPA and high efficiency filters, ultraviolet germicidal irradiation (UVGI), high outside air flowrates, and airstream ozonation are challenged with an array of spores, bacteria, and viruses. A variable air volume system recirculates air with 25% minimum outside air. Performance, annual energy consumption, and life cycle costs are computed and compared.;The airstream ozonation model was developed experimentally and derived theoretically. The bactericidal effects of ozone in air were determined by exposing Escherichia coli and Staphylococcus aureus to high concentrations of ozone. Results showed that high degrees of bacterial inactivation could be achieved rapidly and that they paralleled the action of ozone in water.;Conclusions, guidelines for microbial IAQ limits, HVAC design considerations, implications for nosocomial infections, and a literature review of alternative technologies are summarized and discussed. |
