Method for controlling a hydronic system

A hydraulic unit for a hydronic system, the hydraulic unit comprising:

• a thermal source inlet;
• a thermal source outlet;
• at least one first load circuit connection;
• at least one second load circuit connection;
• a changeover valve connected to the first load circuit connection and to the second load circuit connection and configured to selectively activate a flow of heat transfer medium through the first or the second load circuit;
• and
• a control device controlling said changeover valve, wherein said control device is configured such that for distributing the required thermal energy to the load circuits by control of the changeover valve in at least one operational condition a duty cycle for the first load circuit is extended, resulting in a shortening of the duty cycle of the second load circuit, and that for compensating this shortening of the duty cycle the temperature and/or flow of the heat transfer medium supplied to the second load circuit are adjusted.