Where the use of individual meters is not technically feasible or where it is not cost-efficient to measure heat consumption in each building unit, individual heat cost allocators shall be used to measure heat consumption at each radiator unless it is shown by the Member State in question that the installation of such heat cost allocators would not be cost-efficient.
I gcás nach mbeidh úsáid méadar aonair indéanta go teicniúil nó i gcás nach mbeidh sé costéifeachtúil tomhaltas teasa i ngach aonad foirgnimh a thomhas, úsáidfear leithdháileoirí costais teasa aonair chun tomhaltas teasa a thomhas ag gach radaitheoir mura suífidh an Ballstát atá i gceist nach mbeadh suiteáil na leithdháileoirí costais teasa sin costéifeachtúil.