04-07-2008, 04:24 AM
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Deity
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Join Date: Jul 2004
Location: Saint Regis Falls, NY, USA.
Posts: 3,402
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purpose of the insulation is to keep the flue warm. without it the air surrounding the flue would be cold. it all has to do with establishing a draft as hot or warm air rises and creates an upward air flow for the exhaust. the workers houldn't cram it in tight but a certain amount of loose tamping is better than really ramming it down.
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