stricter energy performance requirements / energy performance / energy performance requirements / active control systems / energy efficient buildings / embedded energy efficiency / energy classification / energy subsidies / evaluation software tools / renewable technologies / net zero energy buildings / energy efficiency / energy efficient materials / renewable energy / energy supply / statistical data collection tools / energy performance certificates / low-energy buildings / energy performance certificate / low energy buildings / life cycle energy / renewable energy potential / energy performance indicators / Energy class / renewable energy share / energy classes / low-energy homes / local industry and technology / energy / /