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Heating systems provides warmth
to the whole interior of a home (or portion of a building) from one point
to multiple rooms.
The whole system may comprise of Heating, Air-Conditioning, Air
Quality and Ventilation.
Central heating differs from local
heating in that the heat generation occurs in one place, such as a furnace or
heater room in a house or a mechanical
room in a large building (though not necessarily at the "central"
geometric point). The most common method of heat-generation involves a heat
pump or the
combustion of gas, propane or oil in a furnace
or boiler. The
resultant heat then gets distributed: typically by forced
air through ductwork, by water circulating through pipes, or by steam fed
through pipes. Increasingly, buildings utilize solar-powered heat sources, in
which case the distribution-system normally uses water-circulation.
In the western and southern
United
States natural-gas-fired central forced-air systems occur most commonly;
these systems and central-boiler systems both occur in the far northern regions
of the USA. Steam-heating systems, fired by coal, oil or gas, feature in the
USA primarily for larger buildings. Electrical
heating systems, far less energy-efficient, occur less commonly.
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