HOT WATER STORAGE TYPE WATER HEATER

摘要

PROBLEM TO BE SOLVED: To reduce the cost and improve the efficiency of an apparatus by supplying hot water at hot water heating target temperature while effectively utilizing hot water stored in a hot water storage tank. SOLUTION: Hot water heating means G is provided for supplying hot water at hot water supply target temperature by mixing water with hot water from a hot water storage tank 1 supplied through a hot water supply passage 6. Operation control means C executes an ordinary hot water supply processing for controlling the hot water supply means G such that water is mixed with hot water from the hot water regenerative tank 1 supplied through the hot water supply passage 6 to supply hot water when hot water supplied from the hot water regenerative tank 1 to the hot water supply passage 6 exceeds heating starting temperature defined taking the hot water supply target temperature as a reference. It further executes a mixing hot water supply processing for mixing hot water derived from an upper portion in the hot water regenerative tank 1 with hot water heated in the heating means 4 and supplying it to the hot water supply passage 6 for hot water supply when hot water supplied from the hot water regenerative tank 1 to the hot water supply passage 6 falls within a mixing temperature range between the heating starting temperature and mixing lower limit temperature lower than the former temperature.