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Old 02-08-2011, 02:06 PM   #1
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Insulation around chimney

May I put insulation around a chimney that runs from the furnace in the basement out through my attic? I just want to put it at the opening in the floor boards right around the chimney in the attic, so the walls where it runs through shouldn't be so cold.
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Old 02-08-2011, 02:12 PM   #2
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That depends on the temp of the pipe. Check to see what your effluent gas temp is, then check w/ the pipe manufacturer/local supplier for what temp the pipe will be (assuming double wall pipe). Mineral wool may be what to use; it takes a fairly high temp and is used in your type of situation.
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