natural gas boiler into the air in the upper part

Gas central heating boilers and furnaces - How do they work?

Jun 18 2008 · A few hundred years ago people would have given an arm and a leg to have central heating in their homes. Just imagine the inconvenience of having to light a wood and coal fire in every separate room to keep your house warm. The basic idea of central heating is really simple: you have a boiler (an easily controllable furnace fueled by gas) in a handy place like your

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