## 3 Results and Discussion
### Comparison between Vasari Corridor and La Specola
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{**Parameter**} & **Point of** & **Average** & \multicolumn{2}{c}{**Percentile**} & \multicolumn{2}{c}{**Mean \(\pm\) 10\% *} & **Reference Value** \\  & **Monitoring** & **Yearly Value** & **7** & **93** & \(-\)**10** & **+10** & **(D.M. 10.05.2001)** \\ \hline \multirow{4}{*}{T [\({}^{\circ}\)C]} & Lungarno (A) & 19.2 & 8 & 30 & - & - & 19 \(\div\) 24 \\  & Ponte Vecchio (B) & 19.2 & 7 & 31 & - & - & 19 \(\div\) 24 \\  & Room X & 19.9 & 9 & 32 & - & - & 19 \(\div\) 24 \\  & Room XXII & 21.9 & 15 & 30 & - & - & 19 \(\div\) 24 \\ \hline \multirow{4}{*}{RH [\%]} & Lungarno (A) & 54.7 & 40 & 74 & 45 & 65 & 35 \(\div\) 50 \\  & Ponte Vecchio (B) & 50.4 & 34 & 68 & 40 & 60 & \\ \cline{1-1}  & Room X & 58.6 & 38 & 76 & 49 & 69 & \\ \cline{1-1}  & Room XXII & 43.1 & 34 & 52 & 33 & 53 & 50 \(\div\) 65 \\ \hline \hline \end{tabular}
* This range is foreseen by the standard UNI EN 15757:2010 [17] only for relative humidity.  
\end{table} 
Table 6: Values of average T and RH by historical climate. \begin{table}
\begin{tabular}{c c c} \hline \hline \multirow{2}{*}{**Parameter**} & **Point of Monitoring** & \multicolumn{2}{c}{**Yearly Value**} & **Yearly Value** \\  & **(D.M. 10.05.2001)** & **(Historical Climate)** \\ \hline \multirow{4}{*}{\(\Delta\)T\({}_{24\max}\) [\({}^{\circ}\)C]} & A & 5.1 & 5.1 \\  & B & 4.5 & 4.5 \\ \cline{1-1}  & X & 2.3 & 2.3 \\ \cline{1-1}  & XXII & 2.8 & 2.8 \\ \cline{1-1}  & A & 32.0 & 32.0 \\ \cline{1-1}  & B & 23.0 & 23.0 \\ \cline{1-1}  & X & 9.1 & 9.1 \\ \cline{1-1}  & XXII & 7.5 & 7.5 \\ \cline{1-1}  & A & 18.0 & 18.0 \\ \cline{1-1}  & B & 29.0 & 29.0 \\ \cline{1-1}  & X & 29.0 & 29.0 \\ \cline{1-1}  & XXII & 33.0 & 33.0 \\ \cline{1-1}  & A & 16.0 & 16.0 \\ \cline{1-1}  & B & 52.0 & 52.0 \\ \cline{1-1}  & X & 51.0 & 51.0 \\ \cline{1-1}  & XXII & 74.0 & 74.0 \\ \cline{1-1}  & A & 19.0 & 86.0 \\ \cline{1-1}  & B & 15.0 & 84.0 \\ \cline{1-1}  & X & 19.0 & 87.0 \\ \cline{1-1}  & XIII & 19.0 & 84.0 \\ \cline{1-1}  & A & 37.0 & 86.0 \\ \cline{1-1}  & B & 39.0 & 87.0 \\ \cline{1-1}  & X & 36.0 & 88.0 \\ \cline{1-1}  & XXII & 16.0 & 86.0 \\ \hline \hline \end{tabular}
\end{table} 
Table 7: Maximum yearly gradient and PI values of hygothermal parameters in the four analyzed zones: A and B in Vasari Corridor and rooms X and XXII in La Specola museum. T and RH conditions were not reasonably acceptable for the preservation of the kind of artworks exhibited during the majority of the monitored period. In spring and autumn, the indoor T and RH are within the recommended range, while, in the extreme conditions of summer and winter, the temperature is above or below the limits, respectively. As expected, due to monitored indoor T and RH values outside the recommended range, the yearly PI\({}_{\text{T}}\) ranges from 15% (position B) to 19% (position A, room X and XXII), and the yearly PI\({}_{\text{RH}}\) ranges from 16% (room XXII) to 39% (position B). In particular, for room XXII, this PI\({}_{\text{RH}}\) low value is due to the low RH values characteristic of the room, which is less affected by the external climate. On the contrary, considering the reference values calculated on the basis of the historical climate, according to UNI EN 15757 [17], for both museums, the yearly PI values are quite high, with PI\({}_{\text{T}}\) ranging from 84% (position B and room XXII) to 87% (room X), and PI\({}_{\text{RH}}\) ranging from 86% (position A and room XXII) to 88% (room X). To assess the thermal energy behavior of buildings with respect to the climatic stresses and to compare the performance of the two analyzed museum buildings, the difference between indoor and outdoor values of temperature and relative humidity was also evaluated. Figure 28 shows the trend of average monthly temperature differences for the Vasari Corridor and La Specola.