To effectively use exhaust heat during a cooling operation in an air heat source by switching the heat source to air and water.

In the outdoor machine 30 side of a heat pump type air conditioner, a heat exchanging coil 31 for an air heat source and a heat exchange coil 32 for a water heat source are provided through selector valves 41 and 42. The heat exchange coil 32 is immersed in the hot water of a heat exchanging coil immersing water tank 70 to which the hot water of a bathtub 60 can be circulated A water level sensor 90 is provided in the heat exchange coil immersing water tank 70 to recognize whether or not the hot water in the bathtub 60 is present. When the hot water is present therein, an air conditioning operation is automatically switched from the air heat source to the water heat source based on the instruction of a control panel 100. During the cooling operation of the water heat source, the water of the bathtub 60 is heated by the heat exchanging coil 32. During the heating operation, a heat exchange medium is heated by remaining hot water so that thermal energy is effectively used.