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Because the peak demand and annual energy use is low, sophisticated and expensive central heating systems are not often required.
en.wikipedia.org Central heating with a coal furnace was added in 1930.
en.wikipedia.org The lighting and traffic-light systems were reconstructed with energy-efficient and non-skypolluting lamps, and the central heating and electric power systems were also reconstructed.
en.wikipedia.org The boat has full air conditioning and central heating.
en.wikipedia.org The cathedral was equipped with an independent central heating and a central vacuum cleaning system employing a complex network of pressurized manifolds and valves.
en.wikipedia.org