Comprehensive technologies for increase of reliability and energy efficiency of medium capacity PTVM and KVGM hot-water boilersRakhimzhan Orumbayev, Andrey Kibarin, Arman Kassimov, Tatyana Khodanova and Maxim KorobkovMATEC Web Conf., 260 (2019) 03003DOI: https://doi.org/10.1051/matecconf/201926003003