The objective of the work is the application of Evogy’s IoT platform, called Simon, on the Humanitas healthcare “Il Fiordaliso”, located in Rozzano (MI). Through Simon functionalities, consumptions, which are divided into two main categories (air handling unit and polyvalent pump) and internal variable trends (temperature, humidity and CO2 level) have been monitored. Then, by analysing constraints of the building and data obtained, more efficient algorithms of functioning have been implemented. Furthermore, the study can be divided into four main parts: 1.??The first one, which contains the initial three chapters, describes not only the European strategies to reduce energy usage in buildings, especially in heating and cooling, with a more detailed review on the Italian policies but also, illustrates Simon functionalities by describing how it works, which devices are needed and how a new algorithm can be executed; 2.??The second part, which includes the fourth and fifth chapters, starts with the plant description to understand where and which sensors have been installed.