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20 December 2009 year (time zone GMT 00:00)  Number of sources in English: 4957
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Gas Boiler and Gas Central Heating Care Summary.

20.12.2009 02:29    heating-care.co.uk
Out of the total warmth produced by gas-fired central heating boilers, around 80% is used as viable energy, which results into adequate warming and
Gas Boiler and Gas Central Heating Care Summary.


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