COMPARATIVE ANALYSIS OF ENERGY EFFICIENCY AND ECONOMIC SUSTAINABILITY IN PUBLIC BUILDINGS: A CASE STUDY OF A KINDERGARTEN USING HEAT PUMPS AND PHOTOVOLTAIC SYSTEMS. Natural Resources and Technology, [S. l.], v. 19, n. 1, p. 29–40, 2025. DOI: 10.46763/NRT2519129a. Disponível em: https://js.ugd.edu.mk/index.php/NRT/article/view/7093. Acesso em: 4 may. 2026.