To provide a hot water supply system constituted not to discharge high temperature water retained in a heat exchanger, directly to a bathtub when reheating is started.
The hot water supply system is constituted to reheat hot water in the bathtub 3 by circulating warm water in the bathtub 3 to the heat exchanger 2 in a hot water storage tank 1 to exchange heat with hot water stored in the hot water storage tank 1. A circulating circuit 4 circulating warm water in the bathtub 3 is provided with a by-pass circuit 5 branching from the circulating circuit 4 upstream of the heat exchanger 2 and joining the circulating circuit 4 downstream without passing through the heat exchanger 2 to mix the warm water in the bathtub 3 with high temperature water which has passed through the heat exchanger 2.
ARITA HIROSHI
NISHIGORI MITSUO
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