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gravity furnace

Posted by Eileen McKee on October 9th, 2002 06:49 PM
In reply to gravity furnace by stewart shaw on August 28th, 2002 03:05 PM [Go to top of thread]

We just moved in to an old home with a gravity furnace and my husband does not want to tear it down but I'm worried about a cold winter and increasing gas prices. By replacing the burner and rewrapping the ducts, how much more efficient a system are we talking about?

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