*2.1. Method Principle*

Using the aforementioned elements, such as the building materials or specific electrical devices, energy savings can be obtained, but they remain insufficient, whether due to the random operation of the devices or to errors made by residents. Therefore, it is very important to include automatic or smart solutions to achieve more energy savings. In this context, this research work proposes an intelligent solution based on the ontology of energy and intelligent reasoning rules. Through the interaction between intelligent reasoning rules and the use of information stored in the knowledge base in the form of concepts (objects). It is possible to regulate the use of household appliances, as well as to make the best use of natural resources. Finally, the home occupants can be alerted to organize simultaneously similar activities. To achieve the main objective, which is the ideal saving of electrical energy consumption, a method has been developed, which includes many steps (Figure 1):

**Figure 1.** The proposed IRRHEM method.
