Leit í EES-gagnagrunni
Council Directive 91/296/EEC of 31 May 1991 on the transit of natural gas through grids
Council Directive 78/170/EEC of 13 February 1978 on the performance of heat generators for space heating and the production of hot water in new or existing non- industrial buildings and on the insulation of heat and domestic hot-water distribution in new non-industrial buildings