UNE 100003-2-1:2015 Thermal systems of the building. Criteria for classifying the quality of thermal systems. Part 2-1: Qualification criteria for the quality of the assembly.
2015UNE 100003-2-1:2015 Thermal systems of the building. Criteria for classifying the quality of thermal systems. Part 2-1: Qualification criteria for the quality of the assembly.