Air conditioning systems, in a simplified and generalized way are composed of two main components, the Condenser and the Evaporator. The condenser in the domestic applications in question is located in an outdoor unit together with the compressor and the control systems.
The air conditioning systems allow heating and cooling, and since its operation is based on a thermodynamic system, it is possible to obtain EER/COP (Energy Efficiency Ratio/coefficient of performance) values in the order of 3.6 (class A), and some equipment can obtain higher values.