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Posted by Sean on November 20, 2007 at 11:06:38:
In Reply to: Re: Preheat boiler return water from stack exhaust? posted by HeatPro on November 20, 2007 at 10:19:58:
So what would happen if you did this as DIY? Cut the line returning water from the radiators, transition to copper and coil the copper line around the outside of the stack going to the chimney, then hook the copper line to the boiler inlet?