Climate change is an increasingly significant issue, prompting the European Union to set the ambitious goal of achieving zero emissions by 2050. District heating emerges as a critical technology in this effort to reduce greenhouse gas emissions. However, most existing district heating networks operate at high temperatures, a condition suitable for fossil fuels but suboptimal for renewable energy sources. To facilitate the integration of it is essential to reduce operational temperatures. Achieving lower operational temperatures necessitates an increase in mass flow rates. Nonetheless, this adjustment faces several constraints, as network pressures and velocities, which are closely tied to mass flow rates, must not exceed maximum allowable values.