## 2 Materials and Methods Background
### SCADA Service, Energy Consumption in Existing Buildings  
This is a kind of dispatching system (unique interface) that allows you to keep informed about your projects from anywhere in the world, with a free service to monitor and manage the operation of all technologies that are connected to SCADA. The dispatch interface can then be accessed remotely from multiple devices. SCADA will allow you to maintain an overall view of the system status, respond to timely crisis situations, optimize operations, facilitate problem solving by analyzing historical data, and reduce operating costs due to fewer demands on infrastructure and staff. Furthermore, visualization is known in the building industry as SCADA (Supervisory Control And Data Acquisition-systems for industrial control and data collection). This is software with which it is possible to concentrate all technologies, not only KNX/EIB, into one unit and thus have control over everything that happens or happens in the building. KNX/EIB means an internationally standardized system of programmable electrical installations. It is an open system; any other stand-alone system can be integrated into it. The set of standards dealing with intelligent electrical installation is CSN EN 5009. Therefore, thanks to these and other management skills, we have included it in Figure 4, where it performs functions that support the importance of NZEB. Therefore, smart energy consists of three independent building blocks that must be interconnected and communicate with each other effectively to form a unified \"smart energy system\". These building blocks are made up of (see Figure 5):  
* Block 1, comprising process A, B (DesignBuilder, HOMER);
* Block 2, comprising process C, D (application of PV*SOL and Monte Carlo simulation programs);
* Block 3, comprising process E, F (application of IoT and KNX, PLC Tecomat Foxtrot, ABB-free@home@ control system). Note that: PLC Tecomat Foxtrot is actually a compact modular control and regulation system for small and medium-sized applications of technical equipment in buildings and ABB-free @ home@ is an intelligent wiring system for modern living. Figure 5: IoT with integration of the NZEB control system in the BEM system. Figure 6 shows the procedure of the EPB solution according to the EMB in steps from the input parameters (data) (indicated as 1 in Figure 6) to the simulation software DesignBuilder (DB). DesignBuilder (indicated as \"A\" in Figure 6) is software for complex dynamic building modelling, analysis, and environmental assessment. The main purpose of this software is to calculate the energy consumption of a building. The building model can be imported from other BIM programs. To perform the simulation, two main components of the energy model of buildings need to be created/modified:  
* Building materials and components (walls, floors, ceilings, occupants, and equipment);
* Equipment components (HVAC equipment and other environment-control systems). The input data (indicated as 2 in Figure 6) include: The value of the heat transfer coefficient of the structure and openings, the conductivity ratio of the solar device, and the building occupancy; after simulation, it is possible to obtain building and block output of zonal data (average temperatures, comfort conditions), internal gains, and latent loads. After modelling and calculations, the output data will be obtained as heat loss, solar energy, room temperature, amount of energy needed for heating, ventilation, and air conditioning. Figure 6: EPB Solution Principle as a Unified SES. After adjusting the display of the results, a comprehensive analysis and comparison of the energy characteristics of the building can be performed (see Tables 1 and 2). In the settings, the user can choose which variables are included in the display of the internal boost, fuel degradation, and comfort or fuel graphs, including CO2 values. All this information can be displayed as a graph, table, or summary.