It is now highly likely that with the rise in fuel, gas and electricity prices, groundwater deposits will become the third primary source of renewable energy, alongside photovoltaic cells and wind turbines. These deposits are characterized by unlimited clean and environmentally friendly energy with constant parameters independent of the fluctuations of wind and solar energy. This paper presents innovative low-carbon solutions for converting groundwater energy into heating and cooling energy in FCH HVAC. A good example of a significant reduction in CO₂ emissions achieved by this technology is a study describing the system implemented in the Integrative Sports and Recreation Center in Łomianki. New installations for the FCH technology in the abovementioned center will reduce the consumption of heating and cooling energy as well as CO₂ emissions by at least 50%. The aim of this article was to present the energy from underground waters and how to use it in HVAC installations. The authors show a new direction for the use of forgotten energy that is not only available in unlimited quantities at all latitudes but also has a very small carbon footprint and can significantly reduce CO₂ emissions.

The direct release of energy from the groundwater under the building of the Sobieski Family Palace in Lublin, Poland, and the obtainment of heat and cooling energy for Heating, Ventilation, and Air Conditioning systems (HVAC) provide an opportunity to reduce electricity and heat consumption and to limit CO₂ emissions by 15–50%. The upgrade to the Sobieski Family Palace and the addition of new educational and administrative functions require state-of-the-art, energy-saving, and environmentally friendly solutions such as Fuel Cells and Hydrogen for Heating, Ventilation, and Air Conditioning (FCH HVAC) systems. As part of the program “Research for high-quality air in architecture and urban studies,” carried out since 2018 at the Institute of Architecture Planning, Department of Contemporary Architecture, Faculty of Civil Engineering and Architecture of the Lublin University of Technology, in 2021, further research was carried out in order to prepare for the potential implementation in 2022 of the project entitled “Development and Upgrade of the Former Sobieski Family Palace in Lublin. The main body of the building—educational and administrative function,” whose chief designer was Architect J. Wrana, Lublin University of Technology, 2021. The objective of this paper is to identify technologies and solutions specifically designed for HVAC systems in upgraded and renovated historic buildings. This paper is also a call for cooperation among institutions, scientists, higher education institutions, as well as an expression of appreciation for the immense energy stored in groundwater. This energy not only has the lowest carbon footprint but also is the only generally accessible large storage source from which we were unable to obtain ecologically pure energy before the introduction of FCH technology.

This paper discusses the application of a new honeycomb FCH HVAC (Free Cooling and Heating System, Heating, Ventilation, and Air Conditioning) ring network technology that reduces the primary energy consumption in existing infrastructure. The aim of the research is to evaluate the cost-environmental viability of upgrading the technical infrastructure and moving from traditional to newly designed green systems built on renewable energy sources. The results show that the energy capacity stored in groundwater is equivalent to 65% of building demand, resulting in a 60% reduction in CO₂ emissions compared to a traditional HVAC system. The solution reduces the consumption of natural resources by using renewable energy sources with horizontal heat exchangers arranged in independent ring configurations.

The article investigates HVAC (heating, ventilation, and air conditioning) technologies aimed at mitigating Primary Energy (PE) consumption in renovated buildings. This research is part of a broader initiative focused on enhancing air quality and reducing the carbon footprint within the fields of architecture and urban planning. Conducted since 2018 by a team from the Institute of Architectural Design at the Department of Contemporary Architecture, Faculty of Civil Engineering and Architecture, University of Technology in Lublin, the study exemplifies the application of these technologies at the historic Marshal Piłsudski’s “Milusin” Manor House in Sulejówek, near Warsaw. The primary objective of this research is to present HVAC solutions, particularly a free cooling and heating system, which are specifically tailored for the renovation of historic structures. This technology effectively recovers thermal energy from groundwater, achieving low energy consumption levels while simultaneously minimizing CO₂ emissions.