HOT-WATER SUPPLY SYSTEM

PROBLEM TO BE SOLVED: To provide a hot-water supply system that can exhibit an adding-water function of a water heater properly. SOLUTION: This hot-water supply system includes a bath water heater 30 having a feature of auto filling a bathtub with hot water and a feature of adding water and a hot-water supply connection unit 20 for supplying warm water with a set temperature or the like to the water heater 30 while mixing low-temperature warm water as needed to preheat warm water generated by a solar heat water heater 10. When the heater 30 is set in an adding water mode, the heater 30 starts auto water filling to a bathtub and the unit 20 starts supplying low-temperature warm water to the heater 30 without mixing preheat warm water, and the heater 30 stops the auto water filling to the bathtub at a timing when the amount of water filling to the bathtub has reached the required amount that is calculated based on an inflow water temperature to the heater 30 being detected after a predetermined time has passed since a time point when the auto water filling to the bathtub started. COPYRIGHT: (C)2005,JPO&NCIPI