Heating system

A heating system, comprising:

• a heat source machine which heats a heat medium;
• a plurality of heating terminals which performs a heating using a heat of the heat medium;
• circulation components of the heat medium;
• a circulation circuit which is configured by connecting the heat source machine, the plurality of heating terminals and the circulation components;
• and a bypass passage which is arranged in the circulation circuit to bypass the heat source machine;
• wherein the heat medium heated by the heat source machine and the heat medium of the bypass passage are mixed and circulated, wherein
• the circulation circuit comprises distribution and mixing parts which have a first distribution part for distributing the heat medium heated by the heat source machine, a second distribution part for distributing the heat medium flowing through the bypass passage, and mixing parts for mixing the heat mediums which are distributed by the first distribution part and the second distribution part and correspond to each other.