Image Number 7 for United States Patent #7432845.
To provide an inexpensive hot-water supply system that allows a user to readily select a desired unit for a physical quantity indicated on a display section of a remote controller. A bathroom-installed remote controller 4 is provided with a indication unit switching device that switches the units of hot-water temperature and hot-water amount represented by data transmitted from a water heater and indicated on a display section 20 between Fahrenheit/gallon (shown in FIG. 3(a)) and Celsius/liter (shown in FIG. 3(b)) depending on the presence or absence of long press of an operational switch 32 while the water heater is in a stand-by state.