What is another word for hot-water furnace?
Pronunciation: [hˈɒtwˈɔːtə fˈɜːnɪs] (IPA) 
Hot-water furnace, also known as a hydronic heating system, is a heating system that uses hot water to circulate heat around a building. Synonyms for hot-water furnace include boiler, heating boiler, hot-water heater, water heater, and heating system. The term "boiler" is commonly used to refer to hot-water furnaces that heat water to steam, which is then distributed throughout a building. A "heating system" is a broader term that encompasses a wide range of heating methods, including hot-water furnaces. "Water heater" is also a popular synonym for hot-water furnace in residential settings. Ultimately, these synonyms refer to the same type of heating system that provides warmth and comfort to buildings and homes.
