Renewable Energy Sources in Heating Systems: Practical Applications and Analysis of Scientific ResearchSardor Khamraev, Jobir Kodirov, Laziz Yuldoshov, Rustam Haydarov, Yulduz Jamoliddinova and Nasiba NasimovaE3S Web Conf., 661 (2025) 04005DOI: https://doi.org/10.1051/e3sconf/202566104005