UNE-EN ISO 6946:2021 Building components and building elements - Thermal resistance and thermal transmittance - Calculation methods (ISO 6946:2017, Corrected version 2021-12)
2021UNE-EN ISO 6946:2021 Building components and building elements - Thermal resistance and thermal transmittance - Calculation methods (ISO 6946:2017, Corrected version 2021-12)
2012UNE-EN ISO 6946:2012 Building components and building elements - Thermal resistance and thermal transmittance - Calculation method (ISO 6946:2007)