| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a bath device with bathtub washing function capable of executing bathtub washing having a suppressed electricity rate in the case where a sufficient amount of hot water is not left in a hot water storage tank of a hot water storage type water heater, when performing a bathtub washing start operation.SOLUTION: When performing a bathtub washing start operation, in the case where a sufficient amount of hot water is not left in a hot water storage tank of a hot water storage type water heater, bathtub washing is made to stand by until a time zone having an inexpensive electricity rate. When a time zone having a comparatively inexpensive electricity rate comes, a hot water storage operation is operated, and after a sufficient amount of hot water is accumulated in the hot water storage type water heater, bathtub washing is executed.</p> |
