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I Could Be Wrong, But ...

Posted by Jay J on July 17th, 2000 03:15 PM
In reply to Metal Chimney noise / gas fireplaces by UlsterDavy on July 17th, 2000 02:25 PM [Go to top of thread]

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(Interesting name ...) But it could simply be expansion and contraction of the metal. When it contracts, usually a 'side' or part of a side of the metal ducting 'pops'.

The only way that I know of to 'reduce' or eliminate the popping is to get the pipe to be a constant temperature. Also, round ducting doesn't have 'sides' like square or rectangular ducting so it doesn't pop. I wonder if your ducting in the fireplace is double-walled. And is it round? I don't believe you can 'insulate' the ductwork due to fire code issues. I suspect you'll have to get rounded ducting (if you don't have it), and double-walled ducting to boot.

I'm sure others will respond to your post. I'll be listening. My best to ya and hope this helps.

Jay J

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