<p>This document contains explanations of the energy system model structure, as well as considered model parameters of the following study: "Energy system modeling for a medium sized neighborhood with focus on heat supply"<br>The development of this document is an ongoing process and was initiated for the creation of an energy system model within the German Federal Ministry of Education and Research (BMBF)-funded project "RessourcenPlan im Quartier (<a href="http://www.fh-muenster.de/r2q">R2Q</a>)". Accordingly, some structural elements and model parameters were adopted, others were updated. </p>