## 2 Materials and Methods
### Daylighting Analysis  
Analysis of the daylighting within the school was performed using Daysim. As was mentioned earlier, by using Daysim, a set of indices was calculated. Daylight autonomy (DA) is a daylight availability metric that corresponds to the percentage of occupied time when the target illuminance at a point in a space is met by daylight. The continuous daylight autonomy is the fraction of time in an annual simulation that an analysis point meets or exceeds a specified illuminance level, with proportional credit given for daylight contributions that partially meet this level. Energy Plus meteorological data files were imported into Daysim. Figure 4 shows the modelling of the entire building carried out in SketchUp. The calculation grid was set with a step of 0.50 m and placed 0.80 m from the floor in order to know the values on the workplace. Figure 3: Load distribution. Figure 2: Ground floor plan distribution. Table 1 shows the values set for the simulation concerning the reflection coefficients of the building envelope materials. The reflection coefficient of the glass was set equal to 10%, while the transmittance was set equal to 90%. The calculation points set in SketchUp were used by the Daysim software to calculate the average DA\({}_{\text{av}}\) (average of daylight autonomy), DA\({}_{\text{min}}\) (minimum value of daylight autonomy), and cDA (continuous daylight autonomy) for each room. Table 2 shows for each room on the ground floor the net area, the number of calculation points set, and the resulting values of DA\({}_{\text{av}}\) (average of the DA values), DA\({}_{\text{min}}\), and cDA\({}_{\text{av}}\) (average of the cDA values). The same values for the second and third floors are shown in Appendices A.1 and A.2. The values of DA\({}_{\text{av}}\) were different for each room, ranging from a minimum of 0% to a maximum of 96.27% and varying for each floor. The DA\({}_{\text{av}}\) was zero in rooms where there were no windows. Indeed, as it is possible to see, the rooms and the libraries had the highest daylight contributions, while the closets and the bathroom had the lowest daylight contribution. The rooms in bold below will be highlighted as s. \begin{table}
\begin{tabular}{c c} \hline \hline \multicolumn{3}{c}{**Reflection Coefficients**} \\ \hline Ceiling & 86.1\% \\ \hline Walls & 86.1\% \\ \hline Floor & 70.3\% \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Reflection coefficients of the opaque materials. \begin{table}
\begin{tabular}{c c c c c c} \hline \hline \multicolumn{1}{c}{**Spaces**} & \multicolumn{1}{c}{**Area (m\({}^{2}\))**} & \multicolumn{1}{c}{N\({}^{\circ}\)**Calculation Points**} & \multicolumn{1}{c}{**DA\({}_{\text{av}}\) (\%)**} & \multicolumn{1}{c}{**DA\({}_{\text{min}}\) (\%)**} & \multicolumn{1}{c}{**cDA\({}_{\text{av}}\) (\%)**} \\ \hline Room 1 & 47.4 & 48 & 90.29 & 70 & 95.60 \\ \hline Room 2 & 46.8 & 42 & 92.02 & 89 & 96.45 \\ \hline Room 3 & 46.8 & 42 & 91.29 & 85 & 95.83 \\ \hline Room 4 & 46.8 & 42 & 91.86 & 86 & 96.26 \\ \hline
**Room 5** & **47.4** & **48** & **90.65** & **72** & **95.81** \\ \hline Room 6 & 42.14 & 45 & 78.98 & 34 & 90.47 \\ \hline Storage area & 36.45 & 38 & 78.67 & 40 & 98 \\ \hline Disabled bathroom & 6.12 & 8 & 73.63 & 54 & 88.13 \\ \hline Women’s bathroom & 11.9 & 12 & 36.92 & 0 & 47.75 \\ \hline
**Men’s bathroom** & **18.02** & **24** & **47.58** & **0** & **72.08** \\ \hline
**Library 1** & **31.2** & **31** & **86.23** & **78** & **93.90** \\ \hline Library 2 & 61.8 & 61 & 87.54 & 81 & 94.44 \\ \hline Closet 1 & 6.01 & 6 & 0 & 0 & 7.5 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Daylighting of the ground floor. Figure 4: School representation realized in SketchUp.