Thermal Performance and Energy Efficiency Analysis of a Natural Gas Boiler Under Variable Load Conditions. Journal of Technology and Policy in Energy and Electric Power, [S. l.], v. 2, n. 2, 2026. DOI: 10.33322/h9qp5xnd. Disponível em: https://jurnal-puslitbangpln.id/index.php/jtpeep/article/view/143. Acesso em: 13 jul. 2026.