WARMING SYSTEM

A warming system includes: a first flow path that connects an engine and a first radiator and through which first cooling water circulates; a second flow path that connects a battery and a second radiator and through which second cooling water circulates; a first branch flow path branching downstream of the first radiator and merging upstream of the engine; a first regulating valve routing the first cooling water into the first branch flow path; a second branch flow path branching downstream of the battery and merging upstream of the second radiator; a second regulating valve routing the second cooling water into the second branch flow path; and a first heat exchanger exchanging heat between the first cooling water and the second cooling water.