**4. Analysis and Discussion**

Through the obtained results, it can be seen that the value of the energy consumed by the IRRHEM solution intervention is less than or equal to the value of the energy consumed without the intervention of this solution, which proves the IRRHEM solution efficiency in many cases, including (Figure 10):

	- Turning off the "air conditioner 6000 BTU" in the parent's room;
	- Turning off the "air conditioner 6000 BTU" in the boy's room;
	- Turning off the "air conditioner 6000 BTU" in the girl's room;
	- Switching off all the electrical equipment in the event of the absence of occupants;
	- Turning off the "air conditioner 6000 BTU" in the rooms of the parents, boy, and girl;
	- Turning off the electric light bulbs in the rooms of the home (except in special cases) and taking advantage of the sunlight coming from outside of the house;
	- When the family members are absent from a room, all electrical equipment is turned off (except in special cases, such as the refrigerator or security equipment);
	- Correcting some negative actions of individuals, such as leaving a device running without it being needed, or forgetting to turn off a working device. In addition, through this solution, a room in the home can be adapted according to the personal preferences of the individuals, and also the similar activities of family members can be grouped together to be conducted at the same time (for example, the activity of eating meals together).
	- Exploiting the external lighting by opening windows and curtains and turning off some (or all) of the lights bulbs;
	- Turning off electrical equipment in the absence of family members. This solution also addresses the case of an individual forgetting or operating equipment without exploiting it. Finally, this solution aggregates the similar activities of family members, simultaneously.
	- Turning off some or all of the light bulbs by taking advantage of the sunlight;
	- In case of the absence of all peoples from a room, the proposed solution take the turning off of electrical appliances (except for some appliances, such as refrigerators and security equipment);
	- Correcting some errors committed in the exploitation of electrical equipment, as well as cases of forgetfulness.

The employment of the IRRHEM solution in different regions results in energy-saving that differs from one region to another. Even if this solution is applied to the same family, we logically obtain different rates of energy consumption; this is due to three main reasons. The first is the climatic factor, which has a great impact on energy saving, thanks to the optimal exploitation of natural resources, such as temperature, lighting, wind. The second factor focuses on home construction that concerns several points, such as home orientation, the quality of the materials used in the construction, and home architecture. Finally, the factor linked to the habits, cultures, and activities of residents also has a significant impact on energy saving. However, for the IRRHEM solution to be universally applied in different regions, a good design of the following elements is necessary:

**Figure 10.** Energy consumption with and without the IRRHEM intervention.


An important point that characterizes this solution concerns the possibility of extending this solution to future works (the flexibility in updating or exporting the ontology of this solution to develop others), due to the use of the ontological approach, where the latter presents one of the main reasons for choosing this approach.
