HOT WATER SUPPLY SYSTEM

Provided is a hot water supply system in which each of multiple hot water suppliers communicatively connected in series by a communication line includes a first communication unit for communicating with another adjacent hot water supplier on the downstream side via the communication line and a second communication unit for communicating with another adjacent hot water supplier on the upstream side. The controller of each hot water supplier executed a control processing to recognize, based on presence or absence of communication by the first communication unit and the second communication unit, its role as a leader positioned at the most upstream side of a series connection constituting a communication connection and operating to execute a supervisory control for cooperative control; a terminal follower positioned at the most downstream of the series connection constituting the communication connection; or a middle follower located between the leader and the end follower.