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2020-2-13 · Until the industrial revolution almost all energy came from renewable sources, but much of it was used inefficiently. Modern technology can capture a lot more of this naturally occurring energy and convert it into electricity or useful heat.
2020-2-2 · Overview. Central heating differs from space heating in that the heat generation occurs in one place, such as a furnace room or basement in a house or a mechanical room in a large building (though not necessarily at the geometrically "central" point). The heat is distributed throughout the building, typically by forced-air through ductwork, by water circulating through pipes, or by steam fed