European Input Data (IMAGE) Estonian Research Council Caption European input data and primary energy factors normalized national nearly zero energy requirements for new apartment buildings with district heating. Estonia was the only country complying with the European commission recommendation marked with EU Nordic. Estonian requirement was followed by Norwegian and Finnish ones while the Swedish one remained to the last position as the less strict in this comparison. Credit Jarek Kurnitski Usage Restrictions The image may only be used with appropriate caption or credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.