摘要:A scientific project focused on the development of a methodology for assessing energy efficiency classes of industrial facilities identified the primary research problems. The first and most important of them is the absence of a categorical and conceptual apparatus in the field of energy efficiency in industry, both in the Russian Federation and at the global level. This fact limits the definition of the system of indicators in the diagnosis of energy consumption. The study analyzed the definitions of an industrial facility contained in the current legislative and regulatory documents, as well as related assessment categories, such as: an industrial building and an industrial enterprise. The lack of unity in the definition of the identified categories, and in some cases their contradiction, demanded clarification of the category “industrial facility” as an object of diagnostics of energy consumption in industry, within the framework of an expert survey with the involvement of Russian and foreign experts in the field of energy. The practical significance of the results of the study is that the clarification of the category “industrial facility” is an integral attribute of the process of developing a methodological framework for assessing energy efficiency in industry, affecting its substantive part.