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Old 02-01-2013, 10:26 PM   #1
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Chimney modification


Brand new here. I did a quick search of the forum but didn't see anybody with the same problem. I have a 2-story house built in the 70's. Top floor has a wood fireplace with a glass door. Bottom floor has a round portal into the chimney for what I'm guessing would be a pot belly stove hookup. I would like to cover up the lower floor chimney portal. The metal structure within appears to have venting around the inner flue. Can I just sawzall the metal that prodrudes from the wall, plug the hole, and put an access panel over the opening?
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Old 02-02-2013, 08:43 AM   #2
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Chimney modification


yes, as long as you use an aluminum cap or plug. sounds like it has a B vent chimney but you can use a single wall cap or plug
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Old 02-02-2013, 09:56 AM   #3
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Chimney modification


Thanks for the prompt reply Yuri. Aren't B vent chimneys for venting gas appliances and not rated for extreme heat from wood fireplaces? This chimney vents a wood fireplace.
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Old 02-02-2013, 09:59 AM   #4
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Chimney modification


Yur right, I was just wakin up and drinkin my coffee. You have a A vent which usually has a stainless steel liner. Then you have to get a cap or plug from a woodstove dealer made of the appropriate metal to keep the insurance company happy and not degrade the chimney rating.
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