| 摘要 |
PROBLEM TO BE SOLVED: To provide a hot water storage type water heater capable of restricting the whole electric power incoming equipment or the maximum demand electric power while avoiding inequality due to the heat radiation time imbalance of each hot water storage type water heater in a facility where a plurality of hot water storage type water heaters are installed.SOLUTION: A hot water storage type water heater according to the present invention comprises: heating means for producing hot water by heating water; a hot water storage tank for accumulating the hot water by running the heating means; and time zone control means for regularly or randomly changing the time zone of hot water storage operation every day or every a plurality of days. In the time zone control means, one time zone that is orderly or randomly selected from a plurality of time zones, into which one day is divided, is to be the time zone of hot water storage operation. |
