HOT-WATER HEATING SYSTEM

PROBLEM TO BE SOLVED: To provide a heating system for informing call without providing a communication line exclusively for call separately. SOLUTION: This heating system is provided with a hot-water heating terminal device 30 installed in a toilet T, a hot-water heating heat source machine 10 circulating and supplying hot water to the hot-water heating terminal device 30, an operation remote-controller 20 operating the hot-water heating heat source machine 10 and provided in a kitchen K, and serial interfaces 51, 52 connecting the hot-water heating terminal device 30, the hot-water heating heat source machine 10, and the operation remote-controller 20 so as to communicate. A call operation button 32 for outputting a call signal is provided in an operation part 31 of the hot-water heating terminal device 30. The call signal outputted by pressing the call operation button 32 is sent to the operation remote-controller 20 through the serial interfaces 51, 52 from the hot-water heating terminal device 30 to inform call by utilizing its display part 21 and a sound outputting part. COPYRIGHT: (C)2004,JPO