## 3 Results  
### Consumption of the Reference Building with Traditional Materials  
This section analyzes the energy losses in the reference building at both locations, as well as the potential for improvement in energy savings. In absolute terms, the energy expenditure due to heating is 30,819.60 kWh (11.68 kWh/m\({}^{2}\)), which is higher than the cooling expenditure of 12,630.92 kWh (4.79 kWh/m\({}^{2}\)) in Seville; while, in Soria, the losses due to heating are 115,076.95 kWh (43.96 kWh/m\({}^{2}\)), higher than the cooling cost of 1453.99 (0.55 kWh/m\({}^{2}\)). The consumptions obtained are low because it is a new building that complies with all the energy and construction requirements established in the regulations. Consumption due to air conditioning (cold and heat) may be due to the transfer of heat by transmission through the enclosure or to changes in air. In this research, the improvement in the energy efficiency of the building is only limited to reducing heat transfer by transmission in the envelope using new materials designed from construction waste. That is why the first step is to know the percentage of energy losses in both cities due to air renewals or heat transfer through the envelope. In Sevilla, the assumption that there was no heat transmission through the building envelope meant that there would always be losses due to air renewals (72%) compared to losses due to heat transfer (28%). For this reason, the energy savings of the building due to air conditioning (cold and heat) is limited to 44% of the total cost. Regarding the behavior of the building depending on the time of year, in the cold months, where the highest consumption of the building occurs, heating consumption is mainly due to energy losses due to air renewals of the ventilation system and infiltrations of air. On the other \begin{table}
\begin{tabular}{c c c c c c} \hline \hline  & & **Recycled Material** & \multicolumn{2}{c}{**Traditional Material**} \\ \cline{3-6}
**Building** & **Application** & & **Thermal** & & **Thermal** \\
**System** & & & **Material** & **Resistance** & **Material** & **Resistance** \\  & & & **[m\({}^{2}\)K/W]** & & **[m\({}^{2}\)K/W]** \\ \hline Facade & Outer coating-Monolayer & Cement mortar with granular & 0.10 & Cement mortar & 0.01 \\ Facade & Exterior Brick Wall & Ceramic brick with sugarcane & & & \\  & & bagasse ash (SBA) & & & \\ Facade & Coating and & Cement mortar with granular & & & \\  & & & & & \\  & & & & & \\ Facade & & & & & \\  & & & & & \\  & & & & & \\  & & & & & \\ \hline \hline \end{tabular}
\end{table} 
Table 5: Traditional materials replaced by recycled materials in the case studies analyzed. hand, in hot months, cooling consumption is due to energy gains due to heat transfer through the building envelope. In addition, the energy losses occur in the same way in the glazing, walls and floor, being around 27% and 28%, while, in the roof, the losses are reduced reaching 18%. On the other hand, in Soria, the results show that under the assumption that there was no heat transfer through the building envelope, there would always be losses due to air renewals (78%) compared to 22% losses due to heat transfer. Therefore, the energy savings of the building due to air conditioning (cold and heat) is limited to 20% of the total cost. Regarding the behavior of the building depending on the time of year, in the cold months where the building's highest consumption occurs, heating consumption is due again to energy losses due to air renewals in the ventilation system and air infiltrations. On the other hand, in hot months, cooling consumption is due to energy gains due to heat transfer through the building envelope. Energy losses occur mainly through the glazing (36%) while in the roof and facade walls (21% and 30%, respectively) the impact is more moderate, dropping considerably on the ground (13%). At present, the implementation of recycled materials from the work for the manufacture of glazing surfaces is complex, and there are no previous studies on the matter.