CONNECTED HOT WATER SUPPLY SYSTEM

The present invention provides a linked hot water supply system capable of determining clogging of an intake filter, comprising: a plurality of combustion-type hot water supply devices provided in parallel between a water supply pipe and a hot water supply pipe; and a control means for changing the number of hot water supply devices that operate in order to adjust the heating capability in accordance with the amount of hot water supplied. Each of the plurality of hot water supply devices has a flow rate detection means for detecting the flow rate of the tap water introduced from the water supply pipe, and a water inlet filter provided to the introduction part of the tap water from the water supply pipe. The control means controls the flow rate detection means to detect the flow rate of the tap water when the plurality of hot water supply devices operate simultaneously. The clogging of the water inlet filters of the plurality of hot water supply devices is determined by comparing the water passing amounts of t