PURPOSE: To control heating while appropriately confirming a heating load and contrive higher comfortability in rise of heating, by controlling the rotating speed of a room fan in consideration of the temperature of a room heat exchanger in accordance with the range of room temperature.

CONSTITUTION: A pipe temperature sensor 14 detects the temperature of the room heat exchanger, and a temperature difference detector 16 detects the temperature difference between a room temperature sensor 13 and a temperature setter 15. In the case of a cooling mode and in the case where room temperature exceeds 18°C, a temperature controlling zone is divided into three zones A, B, C in accordance with the temperature difference between a set temperature and room temperature. In the case of a heating operation under room temperature of not higher than 18°C, temperature controlling zone is divided into three zones A, B, C in accordance with the temperature of the room heat exchanger. A controller 18 receives a signal from the detector 16, then confirms a signal from an operation mode detector 17, and sets the rotating speed of the room fan 19 to a high speed, an intermediate speed and a low speed in correspondence with the zones A, B, C. By making the room heat exchanger temperature and the rotating speed of the room fan correspond to each other, it is possible to eliminate a cold-air feeling in the rise of heating.