boiler, steam boiler - sealed vessel where water is converted to steam

building, edifice - a structure that has a roof and walls and stands more or less permanently in one place; "there was a three-story building on the corner"; "it was an imposing edifice"

central heating - a heating system in which air or water is heated at a central furnace and sent through the building via vents or pipes and radiators

gas heat - heating system that burns natural gas

panel heating - heating system consisting of wall or floor or baseboard or ceiling panels containing electric conductors or heating pipes

radiator - heater consisting of a series of pipes for circulating steam or hot water to heat rooms or buildings

steam heat, steam heating - a heating system in which steam is generated in boilers and piped to radiators

utility - a facility composed of one or more pieces of equipment connected to or part of a structure and designed to provide a service such as heat or electricity or water or sewage disposal; "the price of the house included all utilities"