## 2 Methodology
### Developed Methodology
\begin{table}
\begin{tabular}{c c c} \hline \hline
**Installations** & & **Equipment Description** \\ \hline Heat generators & \(\bullet\) & (One unit) DAIKIN VRF Inverter with heat recovery, model REYQ32T, nominal power 90 kW in cooling and 100 kW in heating, COP/EER 4,02/3,52. \\  & \(\bullet\) & (One unit) DAIKIN VRF Inverter with heat recovery, model REYQ34T, nominal power 95.4 kW in cooling and 106.5 kW in heating, COP/EER 4.06/3.41. \\ Heat generators & \(\bullet\) & (One unit) DAIKIN VRF Inverter with heat recovery, model REYQ36T, nominal power 101 kW in cooling and 113 kW in heating, COP/EER 3.87/3.22. \\  & \(\bullet\) & (Three units) DAIKIN VRF Inverter with heat recovery, model REYQ22T, nominal power 61.5 kW in cooling and 69 kW in heating, COP/EER 4.29/3.75. \\  & \(\bullet\) & (Two units) DAIKIN VRF Inverter with heat recovery, model REYQ30T, nominal power 83.9 kW in cooling and 94 kW in heating, COP/EER 4.12/3.43. \\ \hline Distribution networks & \(\bullet\) & Underfloor heating made of polyethylene pipe model COBRAPEX of the TIEMME brand, on an insulating panel of expanded polystyrene with graphite with relief for pipe fixing (pitch 50 mm), complying with standard EN 13163. \\ Distribution networks & \(\bullet\) & Refrigerant. A three-pipe system through which the refrigerant circulates to the recovery boxes from where it is distributed to two pipes (liquid and gas) to each of the air conditioning units; it is made of copper insulated with an Armaflex-type tube. \\  & \(\bullet\) & Air ducts. A network of galvanized sheet metal ducts, insulated internally, connected to the air conditioners for the supply of ventilation to each of the classrooms and rooms treated in the building. They have been dimensioned with a maximum velocity, vertical ducts of 8 m/s, and floor ducts of 4 m/s, considering an equivalent pressure drop per meter of duct of 0.1 mm.c.w. \\ \hline Heat equipment & \(\bullet\) & Two-way and three-way linear discharge diffusers with built-in plenums. \\ Heat delivery equipment & \(\bullet\) & Supply air swirl diffusers, as well as micro-nozzle plates. \\  & \(\bullet\) & Double deflection discharge grilles with regulation and a metal mounting frame. \\  & \(\bullet\) & Fixed louvers return grilles with filters of different dimensions. \\ Heat delivery equipment & \(\bullet\) & Motorized variable flow regulation boxes for outside air supply and extraction to the different rooms. \\  & \(\bullet\) & System for VRF indoor units. \\  & \(\bullet\) & Air Handing Unit (AHU) system air brand with a rotary recuperator connected to the VRF system. \\ \hline Lighting & \(\bullet\) & LED lighting system with an installed lighting power of 76,761 W. \\ \hline Ventilation & \(\bullet\) & The system measures the CO\({}_{2}\) concentration, regulates the airflow, and estimates flow rates. \\  & \(\bullet\) & Basement floor 466 (l/s), ground floor 12,841 (l/s), 1 st floor: 12,841 (l/s), 2 nd floor: 6022 \\  & (l/s), 3 rd floor: 3546 (l/s), and total 35,718 (l/s). \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Main energy-consuming installations in B2. The specific electricity consumption of the VRF system \(\left(e_{VRFE}^{2022}\right)\) was directly measured through dedicated energy meters installed on the VRF units, providing real-time consumption data for analysis. This measurement adheres to the test methodologies described in UNE-EN 14825 [40], ensuring compliance with standardized operational points and realistic load conditions. The \(SCOP_{year}^{2022}\) is calculated by weighting the \(SCOP_{month}^{2022}\) values with the monthly heat demand for 2022 \(\left(D_{H(month)}^{2022}\right)\). The \(\left(SCOP_{month}^{RCZ}\right)\) and \(\left(SCOP_{year}^{RCZ}\right)\) values are determined for the typical climatic year of the area, utilizing climate data from 2022, and subsequently generalized using climate data from the typical climatic year of the area. This generalization process involves calculating the Correction Factor (CF) (Equation (2)).