Room heater

A room heater system, comprising:

• a room heater comprising
• a first room-temperature detector;
• and
• a controller configured to control temperature by adjusting an amount of heat to be provided to room air according to a difference between a detected temperature detected by the first room-temperature detector and a predetermined set temperature, and
• a thermostat including a second room-temperature detector provided separately from the first room-temperature detector of the room heater, the thermostat being coupled to the controller,
• wherein the thermostat is configured to output an on-command when a detected temperature detected by the second room-temperature detector becomes a predetermined first reference temperature or below,
• wherein the thermostat is configured to output an off-command when a detected temperature detected by the second room-temperature detector becomes a predetermined second reference temperature or above, or when the thermostat is manually operated to be switched off, the second reference temperature being set higher than the first reference temperature,
• wherein the controller is configured to operate a heating element of the room heater on receiving an on-command from the thermostat,
• wherein the controller is configured to stop the heating element of the room heater on receiving an off-command from the thermostat,
• wherein the controller is configured to calculate an updated set temperature using a detected temperature detected by the first room-temperature detector on receiving the off-command from the thermostat and the set temperature as variables, the updated set temperature being used for controlling temperature when an on-command is received again,
• wherein the controller is configured to, when the off-command is received before passing a predetermined period of time after receiving the on-command, prohibit the updating of the set temperature if the detected temperature detected by the first room-temperature detector is a predetermined minimum lower reference temperature or below, and
• wherein the controller is configured to, when the off-command is received before passing a predetermined period of time after receiving the on-command, perform the updating of the set temperature if the detected temperature detected by the first room-temperature detector is above the predetermined minimum lower reference temperature.