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					  Abstract:
					
					
					Energy efficiency is a key element of EU plans to reach a 55% reduction of GHG emissions by 2030 and a carbon-neutral economy by mid-century.1 The energy efficiency of buildings is particularly critical to address the climate crisis; as of 2019, buildings were responsible for about a third of European GHG emissions and 40% of the final energy consumption, mostly for heating purposes supplied with fossil fuels.