## 3 Results  
### Analysis of the Data Obtained by Monitoring  
During the study period, a total of 103,680 readings were taken for each of the analysed parameters. An hourly analysis was carried out to understand the global behaviour of the church, analysing the data every 15 min in the most detailed analyses. The results obtained from monitoring can be seen in Figure 5. The church tends to stabilise the temperature variations that occur outside, and an ascending pattern is exhibited, reaching the maximum \begin{table}
\begin{tabular}{c c c c} \hline \hline  & **Model** & **Measuring Range** & **Accuracy** \\ \hline Humidity/temperature/CO\({}_{2}\) probe & Testo 435-2 & \(-\)20\(\rightarrow\)70 \({}^{\circ}\)C & \(\pm\)0.3 \({}^{\circ}\)C \\  & & +10\(\rightarrow\)100\% HR & \(\pm\)2\% HR \\ Humidity/temperature/CO\({}_{2}\) DataLogger & Testo 160 IAQ & 0\(\rightarrow\)50 \({}^{\circ}\)C & \(\pm\)0.5 \({}^{\circ}\)C \\  & & 0\(\rightarrow\)100\% HR & \(\pm\)2\% HR \\  & & 0\(\rightarrow\)5000 ppm CO\({}_{2}\) & \(\pm\)50 ppm CO\({}_{2}\) \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Summary of measuring instruments and their characteristics. indoor temperature during the month of August. The temperature inside the church is above the maximum temperatures collected outside from 1 May to 10 June, from 28 August to 26 September, and from 19 October to 30 October. During the study period, outdoor air temperatures in Valencia city were between 13 and 38 degrees Celsius, with temperatures inside the church between 23 and 30 degrees. The internal temperature starts to drop through the night, although this drop does not occur fast enough to ensure a comfortable internal temperature at the beginning of the next day. At the start of the day, the energy released from the stone structure, the solar gain from the windows of the presbytery, and the heat from the visitors (to a lesser extent) cause the temperature to rise again, usually from a higher starting temperature than the previous day. The variation in relative humidity inside the church was smaller in range when compared to outside measurements. The relative humidity in the church was between 50% and 70%, while outside, the city recorded a humidity between 25% and 90%. In this case, there was a small increase in the relative humidity, but the church, as with the temperature, does not reproduce the external trend. The church reproduces the pattern of ups and downs in outdoor relative humidity but is not able to increase and decrease the percentage at the same rate as is shown outside. This limitation in the variation in relative humidity, which has its origin in a lack of ventilation, has a positive and a negative side. The positive side is that the church does not reflect the extreme values that are collected outside, but on the other hand, it does not reflect the decreases that occur in the external climate and that can be beneficial for the conservation of heritage. A more detailed analysis of the church's behaviour can be seen in Figures 6 and 7, which show interior monitoring data during the period between 13 July and 27 July. These figures show a comparison of the interior conditions of the church in terms of temperature, relative humidity, CO\({}_{2}\) concentration, and visitor capacity and the exterior conditions. External variations in temperature only affect interior temperatures positively, and the church is not able to reduce outdoor temperature during the night period, in which the outside temperatures drop, as shown in Figure 6. It should be noted that in this period, the outside temperature in the city of Valencia did not fall below 25 \({}^{\circ}\)C, an unusual situation according to the geographical location of the city and the official climate records. The third variable monitored was the concentration of CO\({}_{2}\) inside the church. In this case, a comparison must be made with the visitor capacity as there is a direct relationship between the concentration of CO\({}_{2}\) in the church and the number of visitors.