Abstract
The article is devoted to the study of the evolution of heat meter verification methods as a key element in the system of technical accounting of thermal energy, considered in the context of open technical systems. A comparative analysis of the regulatory approaches to verification operating in the Republic of Kazakhstan has been carried out, their distinctive features and impact on metrological reliability and measurement accuracy have been identified. The necessity of adapting existing methods to changing operating conditions and technology development is substantiated, including through the introduction of artificial intelligence elements for processing and interpreting verification results. Approaches to the modernization of the verification system aimed at improving the efficiency of measuring systems integrated into open power systems are proposed. The results obtained can be used both in verification laboratories and in the development of new regulatory documents, contributing to an increase in accounting accuracy, energy efficiency and sustainability of open energy systems.