Noun
utility to warm a building
Source: WordNetThe heating system was a farce, depending as it did on registers in the floor wherefrom the tepid exhalations of a throbbing and groaning basement furnace were transmitted to the rooms with the faintness of a moribund's last breath. Vladimir Nabokov
I am a man without a furnace. My windows are insulated by 19 sheets of glass which cost less than installing a heating system. Amory Lovins
the heating system wasn't working Source: Internet
they have radiant heating Source: Internet