Heating and hot-water supply apparatus

A heating and hot-water supply apparatus for performing, using a common heating medium, a heating operation by circulating the heating medium through a heating terminal, and a hot-water supply operation of heating service water through heat exchange with the heating medium circulated through a hot-water supply heat exchanger and supplying hot water, the apparatus comprising:

• a heater configured to heat the heating medium;
• a temperature sensor configured to sense a temperature of the heating medium;
• a distribution unit valve configured to change a distribution ratio of the heating medium distributed between the heating terminal and the hot-water supply heat exchanger;
• and a controller configured to control an amount of heat generated by the heater in accordance with the heating operation or the hot-water supply operation, and stop heating with the heater when the temperature of the heating medium reaches a predetermined upper-limit temperature, wherein:
• when receiving a request for the hot-water supply operation during the heating operation with heating the heating medium, the controller sets a regulation period for regulating the amount of heat generated by the heater to less than an amount of heat for the hot-water supply operation;
• and when the controller receives the request, the distribution valve starts changing the distribution ratio, and continues or ends the changing of the distribution ratio within the regulation period.