![Energies | Free Full-Text | District Energy Systems: Challenges and New Tools for Planning and Evaluation | HTML Energies | Free Full-Text | District Energy Systems: Challenges and New Tools for Planning and Evaluation | HTML](https://www.mdpi.com/energies/energies-13-02967/article_deploy/html/images/energies-13-02967-g001.png)
Energies | Free Full-Text | District Energy Systems: Challenges and New Tools for Planning and Evaluation | HTML
![Energies | Free Full-Text | District Energy Systems: Challenges and New Tools for Planning and Evaluation | HTML Energies | Free Full-Text | District Energy Systems: Challenges and New Tools for Planning and Evaluation | HTML](https://www.mdpi.com/energies/energies-13-02967/article_deploy/html/images/energies-13-02967-g002.png)
Energies | Free Full-Text | District Energy Systems: Challenges and New Tools for Planning and Evaluation | HTML
![Erneuerung der Heizung in 2020 - e-con GmbH - e-con I Die Partner für Energieeffizienz, Planung und Erneuerbare Energien Erneuerung der Heizung in 2020 - e-con GmbH - e-con I Die Partner für Energieeffizienz, Planung und Erneuerbare Energien](https://www.e-c-o-n.de/wp-de/wp-content/uploads/2020/02/BAFA-Foerdung-Heizungtausch-2020.png)
Erneuerung der Heizung in 2020 - e-con GmbH - e-con I Die Partner für Energieeffizienz, Planung und Erneuerbare Energien
![Energies | Free Full-Text | District Energy Systems: Challenges and New Tools for Planning and Evaluation | HTML Energies | Free Full-Text | District Energy Systems: Challenges and New Tools for Planning and Evaluation | HTML](https://www.mdpi.com/energies/energies-13-02967/article_deploy/html/images/energies-13-02967-g003.png)