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Posted by HeatPro on November 24, 2008 at 09:28:55:
In Reply to: Re: Heat recovery posted by Rob Lund on November 24, 2008 at 09:16:15:
Should I close it. Obviously that air is going up the stack.
Not if you don't want the products of combustion to stay in the room with the boiler to kill you.
You are throwing away 60% of the gas fuel used with this old monster and have been doing so for over 50 years. You could have purchased 4 new boilers with the wasted money on fuel.
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