| 摘要 |
PROBLEM TO BE SOLVED: To provide a storage water heater capable of carrying out boiling-up operation in consideration of not only the amount of hot water used but also the demand balance of power.SOLUTION: A water heater includes a hot water storage tank 1; a heating means 2 heating hot and cold water in the hot water storage tank; and a control means 3. The water heater has a peak cut operation mode of changing the heating operation of the heating means 2. In an operation mode different from the peak cut operation mode, at least a portion of the amount of hot and cold water to be heated by the heating means 2 in a time zone to limit the operation of the heating operation is heated in a time zone different from the time zone to limit the heating operation in the peak cut operation mode. |
