Abstract: An air conditioning apparatus of the type embedded within a ceiling of a room is disclosed which is characterized in that the upper part of the main body to be installed within the ceiling is divided by a partition plate into a suction side passage and a blow-off side passage, a blower and a heat exchanger being contained in the suction and the blow-off side passages, respectively, and that mounted in the lower part of the main body is a chamber block which comprises a suction chamber in communication with the blow-off side passage and a blow-off chamber provided around the suction chamber and in communication with the blow-off side passage, the chamber block being formed of foamed resin, and that an exposed ceiling panel having suction orifices at the middle thereof and in communication with the suction chamber and blow-off orifices provided around the suction orifices and in communication with the blow-off chamber is mounted to the lower part of the chamber block.

Abstract: Described is a cooling/heating and hot water service system making use of a single heat source apparatus. The system includes a heat pump chiller designed to perform cyclic operations of heating and cooling, a heat exchanger unit having a heat exchanger adapted for supplying hot water and a water reservoir. The operating time zone for storage of hot water and the operating time zone for heating and cooling the room are set by a first program timer while the operating time zone for servicing hot water is set by a second program timer.