Proper definitions and comparable test methods for new heaters to tackle the challenge of a sustainable decarbonization of existing residential buildingsCristian Zambrelli, Valentina D’Acunti, Roberta Tomasi and Cristiana BronzoniE3S Web Conf., 523 (2024) 04001DOI: https://doi.org/10.1051/e3sconf/202452304001