With the action "Compute design flows" all the design flows are calculated based on the power and temperature regime of the end units.
In the figure below you see the calculated design flows, regimes and design heat flows on the labels, where H/C stands for heating and cooling.
Notice that the return temperature at the boiler is not 65°C. The return temperature at the boiler is calculated based on the design flows and return temperature of the end units.
You can view this example with the following token: Mjg0fG9DSU4wWGxt