## 3 Case Study: Campulung Town Hall Building
### Energy Analysis--A Pre-Intervention, Non-Invasive, Multicriterial Study
#### 3.3.1 The Energy Audit  
Part of the building issues presented were identified by studying the building's annual energy consumptions, as the annual heat consumption for space heating (discontinuous heating) is determined according to the Mc001/PII.1 Romanian methodology. The calculation temperature considered the fact that we have a daily variation, so the equivalent internal temperature was calculated to be 20 \({}^{\circ}\)C. Finally, the values based on which the building will  
Figure 5: Image displaying the uninsulated attic.  
be classified from an energetic point of view were determined. Adding up the entire energy consumption presented above results in a total annual energy consumption for heating of 714.7 MWh/year and a specific consumption of 326.7 kWh/m2 year, respectively.  
It can be observed in Table 1 above that the building's main elements do not meet the requirements needed for proper thermal insulation; thus, rehabilitation and thermal energy modernization solutions are needed in order to achieve appropriate thermal insulation and energy saving according to current requirements. It can also be observed that in this case, for example, even if the walls of the building are massive, they do not perform thermally as needed so as to form an optimal indoor climate. This highlights once again the importance of the project team's research before intervention to ensure that the right solutions have been selected in order to extend the building's (i.e., the Town Hall's) lifespan calculations.  
The highest consumptions are related to heating and, secondly, to the lighting system, thus, the energy efficiency measures tackled these parts (see Table 2). In Romania, within the legislation, the building is compared to a reference building (same architecture) but enhanced in terms of thermal resistance and systems. The reference building in this case is calculated as in Table 3.  
It must be mentioned that for historic buildings, there is no clear delimitation for reference buildings, and exterior walls are forbidden to be thermally insulated with external insulation. In this situation, the purpose is not to reach the reference values--this would be impossible--but rather to find the best solutions to the problem of reducing energy consumption while keeping the architectural value of the building.  
\begin{table}
\begin{tabular}{c c c c} \hline \hline
**Construction Element** & **R’ [m2K/W]** & **R’min [m2K/W]** & **Meeting the Thermal** \\  & **(Calculated)** & **(Standard Value)** & **Insulation Requirements** \\ \hline Exterior wall & 17.1 & 1.7 & No \\ Floor slope over basement/terrain & 1.36 & 2.5 & No \\ Floor slope terrace/Sky parlor/Attic & 0.28 & 4 & No \\ Exterior window frame & 0.38 & 0.5 & No \\ \hline \hline \end{tabular}
\end{table}
Table 1: Results of a study conducted on the main construction elements of the studied heritage building in order to identify the current thermal resistance and determine if they meet the thermal insulation requirements for a building of this typology.  
\begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Consumption** & **Heating** & **Domestic Hot Water** & **Lighting** & **Total** \\ \hline Annual consumption [MWh/year] & 714.7 & 1.6 & 50.6 & 766.9 \\ Specific consumption & 326.7 & 0.7 & 23.1 & 350.6 \\ CO2 emissions [kgCO2/m2/year] & 78.4 & 0.2 & 18.1 & 96.7 \\ Energy class-Romanian legislation & E & A & A & **D** \\ \hline \hline \end{tabular}
\end{table}
Table 2: Energy consumption calculations—building Town Hall.  
\begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Consumption** & **Heating** & **Domestic Hot Water** & **Lighting** & **Total** \\ \hline Annual consumption [MWh/year] & 208.0 & 1.4 & 60.8 & 275.6 \\ Specific consumption & 95.1 & 0.7 & 22.0 & 120.2 \\ CO2 emissions [kgCO2/m2/year] & 22.8 & 0.2 & 21.8 & 46.7 \\ Energy class-Romanian legislation & B & A & A & **A** \\ \hline \hline \end{tabular}
\end{table}
Table 3: Energy consumption calculations—reference Town Hall.