This study assesses the economic and technical feasibility of the most common heat accounting systems. Coherently with EED, in such cases alternative cost-efficient methods for heat accounting should be adopted, such as indirect methods. The typical configuration of Italian multiapartment buildings implies quite expensive installation costs and sometimes even prevents the installation for technical reasons. Such systems would reflect users actual thermal energy consumption. The energy efficiency directive 2012/27/EU (EED) requires that final users in multi-apartment buildings supplied by common central heating source should be provided by 31 December 2016 with accounting systems, as long as technical feasibility and reasonable costs in relation to the potential energy savings can be demonstrated.
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