Abstract The 2050 long-term strategy of the European Union contains an analysis of the actions that need to be taken for the transition to a zero GHG emission economy and to to build a better future for all by 2050. The outlined scenarios envisage ambitious objectives in terms of the energy efficient building improvements, the use of RES and the reduction of climate-changing emission. Following this European vision, EU Member States have developed national long-term strategies and focusing on the building sector, in Italy the Recovery and Resilience Plan is providing financing and national and European investment is expected to enable the renovation of more than 100,000 buildings, with a total upgraded area of more than 36 million square metres. The expected energy saving is about 191 Ktoe/year with a reduction in greenhouse gas emissions of about 667 Kton CO2/year. At the end of 2023, the energy requalification of buildings reached about 12 million square metres. By 31 December 2025, the objective is to ensure the energy requalification of buildings for at least 32 million square metres. The proposed research aims to investigate the effects of the renovation activities related to the Superbonus 110% through a multi-criteria analysis, taking into account the beneficial effects consisting of the energy efficiency improvement. The research has been conducted starting from a database of 1,545 dwellings on the territory of Italy, using a data collection questionnaire to estimate the energy consumption of a dwelling, with an in-house developed calculation code based on a simplified dynamic simulation. The database has been set to satisfy different purposes: to characterize the energy uses of residential utilities and identify flexible loads; to estimate the effects of energy upgrading interventions; to analyse the transformation potential of residential buildings with the introduction of an integrated PV-Heat Pump-Thermal Storage system; to evaluate the best energy upgrading proposal based on the climate zone and building location; to evaluate the cost of energy upgrading interventions. The proposed activity aims to complement the studies carried out by projecting the existing situation into more scenarios congruent with the national and European context; the envisioned scenario interprets the need to increase the building stock efficiency and integrate more renewable energy resources into energy systems. In light of the estimates produced and the results achieved, the research aims to emphasize the reuse of building materials issue, looking at circular reuse, offering a different and broader assessment of interventions aimed at the construction sector and, more specifically, the residential sector.
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