5 cards
District heating (n.) is a city sharing one radiator and arguing about the thermostat.
District heating (n.) is heat as a public utility, which means it goes out all at once and comes back by committee.
District heating (n.) is warmth delivered like mail: on a schedule, to a block, with nobody to call.
District heating (n.) is central heating for people who never get to see the furnace.
District heating (n.) is a system where your warmth depends on a valve three streets away and a man you will never meet.