Abstract
<jats:p>One of the key areas that should guide Ukraine’s economic development is the implementation of energy-saving technologies. Improving energy efficiency and ensuring energy conservation are among the main priorities of the energy policies of most countries today. Recently, these issues have become particularly relevant due to instability in energy-producing regions, increasing tensions in global fuel and energy markets, and uncertain forecasts regarding future fluctuations in energy prices. The implementation of energy-efficiency measures during the reconstruction of facilities is a crucial direction for shaping Ukraine’s economic development in the context of constantly rising prices for major energy resources and the country’s significant external dependence on suppliers. The development of a building thermal-modernization project is driven by the need to enhance energy efficiency and reduce the specific heat loss through building envelopes. The implementation of a comprehensive set of thermal-modernization measures will bring the building into compliance with current standards and contribute to improved operational and microclimatic conditions. The purpose of the study is to analyze the current state of energy conservation and energy efficiency in Ukraine, assess the factors influencing energy consumption in buildings and economic sectors, and develop recommendations for implementing effective measures to reduce energy use based on a real thermal modernization project. Methodology of the study is based on general research methods, including an analysis of the regulatory framework, statistical and economic analysis, and a systematic approach to evaluating the factors that affect energy efficiency—covering technical, organizational, and economic aspects. Additionally, comparison and modeling methods are used to determine the potential impact of implementing energy-saving measures and modern technologies for controlling the microclimate in buildings. Results of the study show that the level of energy consumption in buildings in Ukraine largely depends on the condition of external building envelopes, outdated equipment, and the insufficient adoption of modern energy-saving technologies. Based on an analysis of energy conservation policies and European standards, a set of comprehensive measures for the thermal modernization of buildings has been developed to improve their energy efficiency and reduce operating costs. The practical implementation of these measures ensures energy savings, enhanced comfort, and an extended service life of the facilities. Practical implications. The practical significance of the study lies in the possibility of applying the developed thermal modernization measures to improve the energy efficiency of existing public and commercial buildings. The use of the research findings makes it possible to reduce operating costs and enhance the comfort and safety of building use. In addition, the results can serve as a methodological basis for planning similar projects in other buildings. Value/originality. The value of the study lies in its comprehensive integration of an analysis of the state of energy conservation in Ukraine, European standards, and practical solutions for the thermal modernization of buildings. This approach enables the development of effective and economically feasible measures to improve energy efficiency that can be applied in construction practice. Furthermore, the research findings contribute to strengthening energy independence and supporting the development of the construction sector.</jats:p>