Ventilation with external air is one of the most effective strategies to eliminate pathogens from indoor environments.The Air Handling Unit (AHU) is the heart of the ventilation system in commercial buildings and it is designed to achieve this goal.

The guidelines for the reduction of the risk of spreading the Sars-CoV2-19 virus have introduced new operating criteria for ventilation systems, which counterbalance a better healthiness of the air in rooms with a higher energy consumption. Unfortunately, there is no standardized and shared approach to date for the designer to use as a starting point to balance these two different needs. Therefore, engineers should be aware of and pay a greater attention to the identific ...