This is a brief video tutorial on how to use the disposable set “turbine+filter+mouthepiece” for Lung Function testing during COVID-19 pandemic. Since transmission of Corona virus is mostly by contact, during lung function procedures transmission can occur also via aerosolised respiratory secretions (during cough and sneezing). MIR devices have been designed to minimize the risk of infection. This include the implementation of Single Use Disposable items and high bacterial/viral filtration efficiency patient filters.