Experimental investigation on the thermal performance of a domestic gas boiler for space heating with different heating load ratioXinwen Zhang, Sang Yeop Kim, Jong Ho Park, Ji Su Choi, Chul Kim, Kyu Nam Rhee and Gun Joo JungE3S Web of Conf., 396 (2023) 03017DOI: https://doi.org/10.1051/e3sconf/202339603017