| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a hot water supply system causing small temperature change when switching a hot water supply heat source so as to suppress a running cost.SOLUTION: A hot water supply system includes: a hot water supply device 1 as a main water heater A; a hot water storage tank 2 for storing hot water; a control part 5 for controlling hot water storage and hot water supply actions of the main water heater; and an auxiliary water heater 4 for heating hot water from the hot water storage tank 2 or tap water, separately from the main water heater A, and compensating hot water supply load. When switching hot water supply to hot water load from the main water supply heater A to the auxiliary water heater 4, part of hot water from the main water heater A is previously supplied to an auxiliary water heater 4 side, hot water is supplied to a hot water load 17 side by using a water supply and hot water supply passage from both the main water heater A and auxiliary water heater 4, and hot water supply to the hot water supply load 17 thereafter is performed from the auxiliary water heater 4, or hot water supply is performed from both the main water heater A and auxiliary water heater 4 by making a hot water supply ratio from the auxiliary water heater 4 large.</p> |
