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The energy resources, (energy sources) existent in an apartment building (or in any other functional building), are the electricity for the power provision of lighting and operation of the elevator (when present) as well as for heating purposes (Electrical Power, Oil, Natural Gas or/and Geothermal Technology). This thesis, deals through simulation, with the recording of shared energy resources, consumed in an apartment building equipped with oil central heating. More specifically, the system is consisted of a combination of hardware and software (back-end and front-end). The STM32F103C8T6 micro-controller of device records the oil consumption and the boiler activation hours. In addition, since in a real installation, this would be placed in the boiler room area, provisions were taken for a sensor to be also installed in order to monitor the area, for safety purposes. All data collected are stored in the MySQL database, and then are displayed on a website, adapted to the needs of an apartment building. The back-end part of the web application was engineered by the Python programming language and the Flask tool. The front-end part was developed through HTML and Jinja templates as well as CSS, JavaScript and Bootstrap tool. The main goal of the system is to provide complete transparency and immediate information on energy consumption shared issues and finally, through long-term recording, to achieve money savings, wherever is feasible.