Patent ID: 7432845

Claim:
A hot-water supply system, comprising: a water heater; and a remote controller for remotely controlling the water heater that has a display section for indicating a physical quantity concerning the operation of the water heater, wherein the hot-water supply system has: a unit selection switch for selecting the unit for indicating said physical quantity on said display section from among a plurality of kinds of units previously set through the operation of a user; indication unit switching means for indicating said physical quantity on said display section in the unit selected by the unit selection switch; and an out-of-bathroom remote controller provided outside a bathroom and an in-bathroom remote controller provided in the bathroom as said remote controller, said out-of-bathroom remote controller has first communications means for communicating with said in-bathroom remote controller, a first calling switch manipulated by a user, first alarm means, and first call processing means that transmits a first calling signal to said in-bathroom remote controller when the first calling switch is manipulated, and makes said first alarm means issue an alarm when a second calling signal transmitted from said in-bathroom remote controller is received, and said in-bathroom remote controller has second communications means for communicating with said out-of-bathroom remote controller, a second calling switch manipulated by a user, second alarm means, and second call processing means that transmits said second calling signal to said out-of-bathroom remote controller when the second calling switch is manipulated, and makes said second alarm means issue an alarm when said first calling signal transmitted from said out-of-bathroom remote controller is received.