A decentralized adaptive solar air conditioning system is presented, which contains usual air-conditioning equipment and a new module, designed with a honeycomb structure, containing phase change material for latent thermal cold and hot energy storage. Heat recovery devices are responsible for higher system efficiency. A low-cost configuration and a multi-function deluxe version are presented,where in the second case a (magnetic) heat pump, a (magnetic) cooling device and an evaporative apparatus are added. Whereas the simple configuration is of medium cost and shows a good energy saving potential, the deluxe version is more expensive, but, on the other hand, is designed to show a higher energy saving potential. It is also expected to yield exquisite indoor hygienic and climatic conditions.