A building structure for crawl space mounted air conditioning apparatus comprises a crawl space defined by at least one crawl space wall including at least one exterior wall within which a ducted condensing unit (DCU) of the air conditioning apparatus is mountable. The crawl space is configured with at least one through-hole opening formed in the at least one exterior wall for enclosing an element of the air conditioning apparatus which is in fluid communication with the DCU.

A building structure for crawl space mounted air conditioning apparatus comprises a crawl space defined by at least one crawl space wall including at least one exterior wall within which a ducted condensing unit (DCU) of the air conditioning apparatus is mountable. The crawl space is configured with at least one through-hole opening formed in the at least one exterior wall for enclosing an element of the air conditioning apparatus which is in fluid communication with the DCU.

An outdoor energy-storage device of a system for air conditioning interior rooms of a building, wherein the outdoor energy-storage device can be arranged outside the building, can be partially sunken in the ground and includes an energy store for energy transmission and energy storage with a liquid reservoir, a water heat exchanger in the liquid reservoir and an air heat exchanger above the liquid reservoir, a heat pump, which is coupled to the water heat exchanger and the air heat exchanger, and an exhaust-air connection, which is intended for exhaust air from the building and is coupled to the energy store and the heat pump so that the exhaust air entering through the exhaust-air connection adjusts the temperature of the heat pump, at least in certain regions, before the exhaust air enters the energy store.

An outdoor energy-storage device of a system for air conditioning interior rooms of a building, wherein the outdoor energy-storage device can be arranged outside the building, can be partially sunken in the ground and includes an energy store for energy transmission and energy storage with a liquid reservoir, a water heat exchanger in the liquid reservoir and an air heat exchanger above the liquid reservoir, a heat pump, which is coupled to the water heat exchanger and the air heat exchanger, and an exhaust-air connection, which is intended for exhaust air from the building and is coupled to the energy store and the heat pump so that the exhaust air entering through the exhaust-air connection adjusts the temperature of the heat pump, at least in certain regions, before the exhaust air enters the energy store.