Heating system

A heating system, comprising:

• a heat source having a heating unit configured to heat a fluid;
• a heating terminal of which a plurality can be installed;
• an inflow pipe connected to a fluid inlet of the heating unit;
• an outflow pipe connected to a fluid outlet of the heating unit;
• a branch supply pipe directly or indirectly connected to the outflow pipe and connected to a fluid inlet of the heating terminal;
• a branch recovery pipe connected to a fluid outlet of the heating terminal and directly or indirectly connected to the inflow pipe;
• a plurality of fluid flowing part configured to circulate the fluid by operating;
• and
• control means configured to control operation of the plurality of fluid flowing part,
• wherein the fluid flowing part is provided to the inflow pipe or the outflow pipe and is provided to the branch supply pipe or the branch recovery pipe,
• the fluid flowing part provided to the inflow pipe or the outflow pipe is a pump,
• the fluid flowing part provided to the branch supply pipe or the branch recovery pipe is a pump or an on-off valve,
• the control means repeatedly executes, in a predetermined cycle, a sequence to start the operation of the fluid flowing part,
• the predetermined cycle is divided into a plurality of operation start permitted intervals, and
• each of the operation start permitted intervals has a control configuration in which, among the fluid flowing part, only a specific fluid flowing part determined for each operation start permitted interval is permitted to start operating, and the other fluid flowing part other than the specific fluid flowing part is prohibited from starting to operate.