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Posted by HeatPro on November 20, 2007 at 13:26:39:
In Reply to: Re: Preheat boiler return water from stack exhaust? posted by Boiler Guy on November 20, 2007 at 11:55:04:
Good point. Folks with no clue about physics often think as a DIY, that putting something that looks like it might work with no heat transfer calculations like a coil of no dimensions, is enough to change a boiler output. A decoration of adding paint or wallpaper can make a room 'warmer.'