Section J Energy EfficiencySpecification JVa Additional requirementsSpecification JVb Modelling parametersSpecification JVc Modelling profilesPart J0 Energy efficiencyPart J1 Building fabricPart J2 * * * * *Part J3 Building sealingPart J4 * * * * *Part J5 Air-conditioning and ventilation systemsPart J6 Artificial lighting and powerPart J7 Heated water supply and swimming pool and spa pool plantPart J8 Facilities for energy monitoringSpecification J1.2 Material propertiesSpecification J1.5a Calculation of U-Value and solar admittanceSpecification J1.5b Spandrel panel thermal performanceSpecification J1.6 Sub-floor thermal performanceSpecification J6 Lighting and power control devices