## 3 Results and Discussion in General
### Results
#### 3.1.2 The Prototype of the Prefabricated House IDA I  
Based on the fundamental principles of the ISOMAX system [1], we modified and added a high-end heat/cooling source and the end elements of the transfer systems to the prefabricated house IDA I prototype to ensure the heating/ventilation system would operate reliably. The design and construction of the IDA I prefabricated house prototype are discussed in this section as a synthesis of the knowledge discovered through scientific analysis and data transformation. The panel house IDA I prototype is located in the Panelaren Vrakuna, a.s. plant in Bratislava, Slovakia, Figure 20. The building is used as an administration; it has two above-ground floors, and the second floor is an attic [13]. From a structural perspective, it is a prefabricated longitudinal load-bearing system, with load-bearing side walls and one central wall built of reinforced concrete panels. A perpendicular ridge to the front facade is on the gabled roof. There are offices, a restroom, and a hallway on the ground floor. The attic has a hallway, offices, and a bathroom. The layout and construction solution is clearly shown in the photographic documentation in Figures 21-24 [13]. \begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \(\text{d}_{\text{T}ext}\) (m) & 0.075 & 0.100 & 0.125 & 0.150 & 0.175 & 0.200 & 0.250 & 0.300 & 0.400 \\ \hline U (W/(m\({}^{2}\cdot\)K)) & 0.167 & 0.150 & 0.137 & 0.125 & 0.115 & 0.107 & 0.093 & 0.083 & 0.068 \\ R (m\({}^{2}\cdot\)K/W) & 5.802 & 6.478 & 7.154 & 7.829 & 8.505 & 9.181 & 10.532 & 11.883 & 14.586 \\ \(\theta_{\text{TB}}\) (C\({}^{\circ}\)C) & –0.190 & 1.860 & 3.540 & 4.930 & 6.100 & 7.110 & 8.730 & 10.000 & 11.830 \\ \hline \(\text{d}_{\text{T}ext}\) (m) & 0.500 & 0.600 & 0.700 & 0.800 & 0.900 & 1.000 & 1.500 & 2.000 & 3.000 \\ \hline U (W/(m\({}^{2}\cdot\)K)) & 0.057 & 0.05 & 0.044 & 0.039 & 0.035 & 0.032 & 0.022 & 0.017 & 0.012 \\ R (m\({}^{2}\cdot\)K/W) & 17.289 & 19.991 & 22.694 & 25.397 & 28.099 & 30.802 & 44.316 & 57.829 & 84.856 \\ \(\theta_{\text{TB}}\) (C\({}^{\circ}\)C) & 13.090 & 14.02 & 14.73 & 15.28 & 15.74 & 16.11 & 17.29 & 17.92 & 18.58 \\ \hline \end{tabular}
\end{table} 
Table 1: Parameters during heating. \begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \(\text{d}_{\text{T}ext}\) (m) & 0.075 & 0.100 & 0.125 & 0.150 & 0.175 & 0.200 & 0.250 & 0.300 & 0.400 \\ \hline U (W/(m\({}^{2}\cdot\)K)) & 0.167 & 0.150 & 0.137 & 0.125 & 0.115 & 0.107 & 0.093 & 0.083 & 0 Figure 21: Completion of the ground floor assembly. (Photo archive: [PERSON]) [13]. Figure 23: View of the realization of the wooden truss. (Photo archive: [PERSON]) [13]. Figure 20: Location of the prototype of the prefabricated house IDA I. within Bratislava, Slovak Republic. ([[https://www.google.com/maps](https://www.google.com/maps)]([https://www.google.com/maps](https://www.google.com/maps)), accessed on 17 August 2022). Figure 22: Mounting the attic (Photo archive: [PERSON]) [13]. Solar energy is absorbed by the energy roof \"1\" and stored in a medium temperature ground heat storage \"3\" (GHS-MT), which maintains a temperature range of 30 to 50 \({}^{\circ}\)C. This heat source is used for heating, ventilation, and hot water preheating. As a peak heat source \"17\", it is suggested that a fireplace with a hot-water heat exchanger and an electric heating insert in the heating water storage tank be used to compensate for heat losses. The heating water storage tank (short-term heat storage) \"2\" and the ground heat storage tank (long-term heat storage) \"3\" are both connected to the fireplace hot-water heat exchanger, Figure 25.  
The heating system includes underfloor heating circuits \"6\", and a thermal barrier \"4\" is built into the exterior perimeter walls.