Dagli standard nZEB verso gli edifici ad "intelligenza energetica"

An appropriate technological retrofit design starts with a detailed analysis of the technical and structural DNA of the building in which specific performance weaknesses can be identified. In this contribution, the requirements that the building envelope must meet in the light of current regulations (L. 90/2013) are analysed: global average heat exchange coefficient, equivalent solar area, primary energy requirements, efficiency of heating, cooling and domestic hot water systems and, finally, the obligation to integrate renewable sources. However, an open look at the standards given the latest Directive 2018/844/EU issued by the European Union about the energy performance of buildings is indispensable, now just around the corner. In this process of innovation, the new Directive proposes a series of tools that support the designer in order to assess both the critical aspects and the potential of the building-system: an optional system of "Building Renovation Passport", which details the methods and times with which to carry out a deep redevelopment in phases, transforming an existing building into a ZEB; "Smart Readiness Indicator", which will measure the performance of buildings using new technologies and electronic systems to adapt to the needs of the consumer, optimizing its operation and interacting with the network in an increasingly smart way, ensuring maximum well-being with minimum energy consumption; "Building & Automation Control System", in order to improve energy performance and safety.