A storage unit 37 of a control apparatus 31 stores the first temperature set in advance and the second temperature set to be lower than the first temperature, for each space 2. An operation device 34 of the control apparatus 31 controls at least one of an amount of heating of a fluid by a heat source unit 21 and an amount of flow of the fluid into a radiator 13 so that when a human body is detected by a human detection sensor 12, a temperature to be measured by a room temperature sensor 11 becomes the first temperature, and when no human body is detected by the human detection sensor 12, the temperature to be measured by the room temperature sensor becomes the second temperature.