Estimation of Airborne Particle Removal Efficiency in Personal Isolation Room based on Full-scale Experiment

This study investigates the performance of Temporary Isolation Rooms (TIRs) in controlling airborne transmission of aerosols. The study utilized a full-scale experimental chamber with various airflow rates of Fan Filter Units (FFUs) and Air Changes per Hour (ACH). Aerosol removal efficiency and penetration coefficients were evaluated using Di-Ethyl-Hexyl-Sebacate (DEHS) particles and optical particle counters. Results showed that TIR performance varies significantly with aerosol diameters and FFU airflow rates. Larger aerosol diameters and higher airflow rates improved removal efficiency, crucial for controlling smaller aerosols relevant to airborne transmission. However, aerosols with diameters from 0.3 μm to 0.46 μm consistently penetrated the TIR from the room, regardless of airflow rate. This study underscores the importance of optimizing airflow dynamics and understanding aerosol behavior for effective infection control in healthcare settings.